JP7770514B2 - Culture medium manufacturing method, culture medium manufacturing device, and cultivation system including the culture medium manufacturing device - Google Patents
Culture medium manufacturing method, culture medium manufacturing device, and cultivation system including the culture medium manufacturing deviceInfo
- Publication number
- JP7770514B2 JP7770514B2 JP2024195136A JP2024195136A JP7770514B2 JP 7770514 B2 JP7770514 B2 JP 7770514B2 JP 2024195136 A JP2024195136 A JP 2024195136A JP 2024195136 A JP2024195136 A JP 2024195136A JP 7770514 B2 JP7770514 B2 JP 7770514B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- culture medium
- tank
- culture solution
- value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/20—Reduction of greenhouse gas [GHG] emissions in agriculture, e.g. CO2
- Y02P60/21—Dinitrogen oxide [N2O], e.g. using aquaponics, hydroponics or efficiency measures
Landscapes
- Hydroponics (AREA)
- Fertilizers (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Description
本発明の一実施形態は、重炭酸イオンを含む水から重炭酸イオンを除去する方法、その方法を含む窒素肥料、培養液の製造方法に関する。また、本発明の一実施形態は、重炭酸イオンを含む水を処理して培養液を製造する培養液製造装置、及びその培養液製造装置を含む栽培システムに関する。 One embodiment of the present invention relates to a method for removing bicarbonate ions from water containing bicarbonate ions, and a method for producing nitrogen fertilizer and nutrient solution that includes this method. Another embodiment of the present invention relates to a nutrient solution production device that treats water containing bicarbonate ions to produce nutrient solution, and a cultivation system that includes this nutrient solution production device.
植物の水耕栽培は、窒素、リン、カリウム、カルシウム、マグネシウム、硫黄、ホウ素、鉄、マンガン、亜鉛、モリブデン、ニッケル、銅といった植物の育成に必須の元素を肥料として施用することが必要とされている。水耕栽培ではこれらの必須元素を含む化成肥料を水に溶かしたものを培養液として用いている。培養液の作製に使用される原水に重炭酸イオン（ＨＣＯ３ －）が多く含まれる場合、培養液のｐＨを上昇させるため、煩雑なｐＨ調整や頻繁な培養液の交換が必要となる。そこで、原水のｐＨ値を調整するために前処理として硝酸やリン酸で中和して、重炭酸イオンの濃度を２０～５０ｐｐｍ程度まで低下させておくと良いとされている（非特許文献１、２参照）。 Hydroponic cultivation of plants requires the application of fertilizers containing elements essential for plant growth, such as nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, boron, iron, manganese, zinc, molybdenum, nickel, and copper. In hydroponic cultivation, a chemical fertilizer containing these essential elements dissolved in water is used as the nutrient solution. If the raw water used to prepare the nutrient solution contains a large amount of bicarbonate ions (HCO 3 − ), the pH of the nutrient solution increases, necessitating complex pH adjustments and frequent replacement of the nutrient solution. Therefore, it is considered effective to adjust the pH of the raw water by neutralizing it with nitric acid or phosphoric acid as a pretreatment to reduce the bicarbonate ion concentration to approximately 20 to 50 ppm (see Non-Patent Documents 1 and 2).
水耕栽培において、炭酸アンモニウム、炭酸カリウム、水等に含まれる重炭酸イオンは、ｐＨ値を上昇させるばかりでなく、培養液に含まれるカルシウムイオン等の陽イオンと結合して析出し、培養液の水槽や水路の中での沈着、肥効率の低下、培養液の品質低下、開口部及び配管の目詰まりや閉塞、管理コストの増加の原因となるため前処理が必要とされている。 In hydroponic cultivation, bicarbonate ions contained in ammonium carbonate, potassium carbonate, water, etc. not only raise the pH value, but also combine with cations such as calcium ions contained in the nutrient solution to precipitate, causing sedimentation in the nutrient solution tank or waterway, reducing fertilizer efficiency, degrading the quality of the nutrient solution, clogging or blocking openings and pipes, and increasing management costs, making pretreatment necessary.
従来技術のように、前処理として原水に硝酸やリン酸を添加した場合には、添加された硝酸やリン酸塩の分を差し引いて肥料成分の調製をしなければならず複雑な肥料計算が必要となる。 When nitric acid or phosphoric acid is added to raw water as a pretreatment step, as in conventional technology, the fertilizer components must be adjusted by subtracting the added nitric acid or phosphate, requiring complex fertilizer calculations.
このような問題に鑑み、本発明の一実施形態は、重炭酸イオンを含む水から重炭酸イオンを除去する方法を提供することを目的とする。また、本発明の一実施形態は、炭酸アンモニウム、炭酸カリウム等の炭酸塩を培養液に使用する場合に、培養液の製造に用いる水に重炭酸イオンが含まれていても培養液中に析出物が生成されることを防ぎ、肥料調整の際に複雑な肥料計算を必要としない重炭酸イオンを含む水の処理方法および培養液の製造方法を提供することを目的の一つとする。また、本発明の一実施形態は、炭酸アンモニウム、炭酸カリウム等の炭酸塩を培養液に使用する場合に、培養液を製造する水に重炭酸イオンが含まれている場合でも析出物が生成されることを防ぐことのできる培養液の製造装置を提供することを目的の一つとする。 In light of these problems, one embodiment of the present invention aims to provide a method for removing bicarbonate ions from water containing bicarbonate ions. Another embodiment of the present invention aims to provide a method for treating water containing bicarbonate ions and a method for producing a culture solution that prevents the formation of precipitates in the culture solution even if the water used to produce the culture solution contains bicarbonate ions when carbonates such as ammonium carbonate and potassium carbonate are used in the culture solution, and does not require complex fertilizer calculations when adjusting the fertilizer. Another embodiment of the present invention aims to provide a culture solution production device that prevents the formation of precipitates even if the water used to produce the culture solution contains bicarbonate ions when carbonates such as ammonium carbonate and potassium carbonate are used in the culture solution.
本発明の一実施形態は、炭酸アンモニウム、炭酸カリウム等の炭酸塩を培養液に使用する場合に、原水に重炭酸イオンが含まれていても析出物が生成されることを防ぎ、複雑な肥料計算を必要としない培養液の製造方法であって、重炭酸イオン（ＨＣＯ３ －）及びアンモニアイオンを含む水を硝化させることで、アンモニア態窒素を硝酸態窒素へ変換し、重炭酸イオンを二酸化炭素に変換することを含む。 One embodiment of the present invention is a method for producing a culture solution that prevents the formation of precipitates even when bicarbonate ions are contained in raw water when a carbonate such as ammonium carbonate or potassium carbonate is used in the culture solution, and does not require complex fertilizer calculations. The method includes nitrifying water containing bicarbonate ions (HCO 3 − ) and ammonia ions, thereby converting ammonia nitrogen into nitrate nitrogen and bicarbonate ions into carbon dioxide.
本発明の一実施形態に係る重炭酸イオンを含む水の処理方法は、重炭酸イオン（ＨＣＯ３ －）が含まれる水に炭酸アンモニウム（（ＮＨ４）２ＣＯ３）を添加し、硝化させることで、アンモニア態窒素を硝酸態窒素へ変換し、重炭酸イオンを二酸化炭素に変換することを含む。 A method for treating water containing bicarbonate ions according to one embodiment of the present invention includes adding ammonium carbonate ((NH 4 ) 2 CO 3 ) to water containing bicarbonate ions (HCO 3 − ) and nitrifying the water to convert ammonia nitrogen into nitrate nitrogen and bicarbonate ions into carbon dioxide.
本発明の一実施形態は、炭酸アンモニウム、炭酸カリウム等の炭酸塩が添加された培養液、又は重炭酸イオンが含まれる水を硝化により処理した水（処理水）のｐＨ値を測定し、培養液又は処理水のｐＨ値が４．５未満に低下した場合、培養液又は処理水に、炭酸アンモニウム（（ＮＨ４）２ＣＯ３）と、炭酸カリウム（Ｋ２ＣＯ３）、炭酸カルシウム（ＣａＣＯ３）、および炭酸マグネシウム（ＭｇＣＯ３）等の炭酸塩との少なくとも一方を添加して、培養液又は処理水のｐＨ値を４．５以上６．５以内の範囲内に調整することを含む。重炭酸イオン（ＨＣＯ３ －）及び炭酸アンモニウム（（ＮＨ４）２ＣＯ３）を含む水の硝化は硝化菌を用いて行うことができる。 One embodiment of the present invention involves measuring the pH of a culture solution to which carbonates such as ammonium carbonate or potassium carbonate have been added, or water containing bicarbonate ions, treated by nitrification (treated water), and if the pH of the culture solution or treated water drops below 4.5, adding at least one of ammonium carbonate ((NH 4 ) 2 CO 3 ) and a carbonate such as potassium carbonate (K 2 CO 3 ), calcium carbonate (CaCO 3 ), or magnesium carbonate (MgCO 3 ) to the culture solution or treated water to adjust the pH of the culture solution or treated water to within a range of 4.5 to 6.5. Nitrification of water containing bicarbonate ions (HCO 3 - ) and ammonium carbonate ((NH 4 ) 2 CO 3 ) can be carried out using nitrifying bacteria.
本発明の一実施形態に係る培養液の製造方法は、重炭酸イオン（ＨＣＯ３ －）が含まれる水、又は炭酸カリウム（Ｋ２ＣＯ３）等の炭酸塩が添加された培養液に、炭酸アンモニウム（（ＮＨ４）２ＣＯ３）を添加し、硝化させることで、重炭酸イオンが含まれる水又は炭酸塩が添加された培養液に含まれるアンモニア態窒素を硝酸態窒素へ変換し、重炭酸イオンを二酸化炭素に変換する第１の段階と、第１の段階を経た処理水に、窒素、リン、カリウム、カルシウム、マグネシウム、硫黄、ホウ素、鉄、マンガン、亜鉛、モリブデン、ニッケル、および銅から選ばれた少なくとも１種の元素を含む肥料成分を添加する第２段階と、を含む。 A method for producing a culture solution according to one embodiment of the present invention includes a first step in which ammonium carbonate ((NH 4 ) 2 CO 3 ) is added to water containing bicarbonate ions (HCO 3 − ) or a culture solution to which a carbonate such as potassium carbonate (K 2 CO 3 ) has been added, and nitrification is carried out to convert ammonia nitrogen contained in the water containing bicarbonate ions or the culture solution to which a carbonate has been added into nitrate nitrogen and convert bicarbonate ions into carbon dioxide; and a second step in which a fertilizer component containing at least one element selected from nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, boron, iron, manganese, zinc, molybdenum, nickel, and copper is added to the treated water from the first step.
本発明の一実施形態に係る培養液の製造方法は、硝化処理中の水のｐＨを測定し、処理水のｐＨ値が４．５未満に低下した場合、硝化処理中の水に炭酸アンモニウム（（ＮＨ４）２ＣＯ３）と、炭酸カリウム（Ｋ２ＣＯ３）、炭酸カルシウム（ＣａＣＯ３）、および炭酸マグネシウム（ＭｇＣＯ３）等の炭酸塩との少なくとも一方を添加して、処理水のｐＨ値を４．５以上６．５以内の範囲内に調整することを含む。重炭酸イオン（ＨＣＯ３ －）及び炭酸アンモニウム（（ＮＨ４）２ＣＯ３）を含む水の硝化は硝化菌を用いて行うことができる。 A method for producing a culture medium according to one embodiment of the present invention includes measuring the pH of water during nitrification treatment, and if the pH value of the treated water falls below 4.5, adding at least one of ammonium carbonate ((NH 4 ) 2 CO 3 ) and a carbonate such as potassium carbonate (K 2 CO 3 ), calcium carbonate (CaCO 3 ), or magnesium carbonate (MgCO 3 ) to the water during nitrification treatment to adjust the pH value of the treated water to within a range of 4.5 to 6.5. Nitrification of water containing bicarbonate ions (HCO 3 − ) and ammonium carbonate ((NH 4 ) 2 CO 3 ) can be carried out using nitrifying bacteria.
本発明の一実施形態に係る培養液製造装置は、重炭酸イオン（ＨＣＯ３ －）が含まれる水、又は炭酸カリウム（Ｋ２ＣＯ３）等の炭酸塩が添加された培養液に炭酸アンモニウム（（ＮＨ４）２ＣＯ３）を添加し硝化させることで、処理水に含まれるアンモニア態窒素を硝酸態窒素へ変換し、重炭酸イオンを二酸化炭素に変換する前処理部と、第１の段階を経た処理水に、窒素、リン、カリウム、カルシウム、マグネシウム、硫黄、ホウ素、鉄、マンガン、亜鉛、モリブデン、ニッケル、および銅から選ばれた少なくとも１種の元素を含む肥料成分を添加する調整部を含む。 A culture solution manufacturing device according to one embodiment of the present invention includes a pretreatment unit that adds ammonium carbonate ((NH 4 ) 2 CO 3 ) to water containing bicarbonate ions (HCO 3 − ) or a culture solution to which a carbonate such as potassium carbonate (K 2 CO 3 ) has been added to nitrify the water, thereby converting ammonia nitrogen contained in the treated water into nitrate nitrogen and converting bicarbonate ions into carbon dioxide, and an adjustment unit that adds fertilizer components containing at least one element selected from nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, boron, iron, manganese, zinc, molybdenum, nickel, and copper to the treated water that has undergone the first stage.
本発明の一実施形態に係る培養液製造装置は、前処理部に処理水のｐＨ値を計測するｐＨセンサと、処理水に炭酸アンモニウム（（ＮＨ４）２ＣＯ３）を添加する第１薬剤供給部とが含まれてもよい。また、本発明の一実施形態に係る培養液製造装置は制御部を含み、制御部が、前処理部のｐＨセンサの計測値が４．５未満であるとき、処理水のｐＨ値が４．５以上６．５以下となるように、第１薬剤供給部から炭酸アンモニウム（（ＮＨ４）２ＣＯ３）を添加する機能を有していてもよい。前処理部は、処理水を攪拌する攪拌部及び処理水を曝気する曝気部の少なくとも一方又は両方を含んでいてもよい。 A culture solution manufacturing apparatus according to one embodiment of the present invention may include a pH sensor in the pretreatment unit that measures the pH value of the treated water and a first chemical supply unit that adds ammonium carbonate ((NH 4 ) 2 CO 3 ) to the treated water. The culture solution manufacturing apparatus according to one embodiment of the present invention may also include a control unit that, when the measured value of the pH sensor in the pretreatment unit is less than 4.5, adds ammonium carbonate ((NH 4 ) 2 CO 3 ) from the first chemical supply unit so that the pH value of the treated water is 4.5 or more and 6.5 or less. The pretreatment unit may include at least one or both of an agitation unit that agitates the treated water and an aeration unit that aerates the treated water.
本発明の一実施形態に係る水耕栽培システムは、前処理部と調整部を含む培養液製造装置と植物を栽培する栽培槽とを含み、栽培槽に調整部から培養液が供給される。 A hydroponic cultivation system according to one embodiment of the present invention includes a culture solution manufacturing device including a pretreatment unit and an adjustment unit, and a cultivation tank for cultivating plants, with the culture solution being supplied to the cultivation tank from the adjustment unit.
本発明の一実施形態によれば、重炭酸イオン（ＨＣＯ３ －）が含まれる水、又は炭酸カリウム（Ｋ２ＣＯ３）等の炭酸塩が添加された培養液に炭酸アンモニウム（（ＮＨ４）２ＣＯ３）を添加し硝化することで、ｐＨ値の上昇を抑制し、且つ重炭酸イオンを除去することができる。また、硝化処理された水を培養液に用いる場合に、肥料成分を加えて調整を行っても沈殿物の生成を抑制することができる。 According to one embodiment of the present invention, ammonium carbonate ((NH 4 ) 2 CO 3 ) is added to water containing bicarbonate ions (HCO 3 − ) or to a culture solution to which a carbonate such as potassium carbonate (K 2 CO 3 ) has been added to cause nitrification, thereby suppressing an increase in pH and removing bicarbonate ions. Furthermore, when nitrified water is used as a culture solution, the formation of precipitates can be suppressed even if fertilizer components are added to adjust the solution.
以下、本発明の実施の形態を、図面等を参照しながら説明する。但し、本発明は多くの異なる態様で実施することが可能であり、以下に例示する実施の形態の記載内容に限定して解釈されるものではない。図面は説明をより明確にするため、実際の態様に比べ、各部の幅、厚さ、形状等について模式的に表される場合があるが、あくまで一例であって、本発明の解釈を限定するものではない。また、本明細書と各図において、既出の図に関して前述したものと同様の要素には、同一の符号を付して、詳細な説明を適宜省略することがある。さらに各要素に対する「第１」、「第２」と付記された文字は、各要素を区別するために用いられる便宜的な標識であり、特段の説明がない限りそれ以上の意味を有しない。 Embodiments of the present invention will be described below with reference to the drawings. However, the present invention can be implemented in many different forms, and should not be construed as being limited to the description of the embodiments exemplified below. To clarify the explanation, the drawings may show the width, thickness, shape, etc. of each part schematically compared to the actual form, but these are merely examples and do not limit the interpretation of the present invention. Furthermore, in this specification and each figure, elements similar to those previously described with reference to the previous figures will be given the same reference numerals, and detailed descriptions may be omitted as appropriate. Furthermore, the letters "first" and "second" attached to each element are convenient labels used to distinguish each element, and have no further meaning unless otherwise specified.
［第１実施形態］
図１は、本発明の一実施形態に係る培養液製造装置１００の構成を示す。培養液製造装置１００は前処理部１０２及び調整部１０４を含む。前処理部１０２は窒素肥料（又は培養液）を製造するための水（前処理水１１０）が溜められる前処理槽１０６を有する。調整部１０４は、前処理槽１０６で所定の処理がされた水（前処理水１１０）に肥料成分等が添加されて培養液１１２が生成される調整槽１０８を有する。
[First embodiment]
1 shows the configuration of a culture solution production apparatus 100 according to one embodiment of the present invention. The culture solution production apparatus 100 includes a pretreatment unit 102 and an adjustment unit 104. The pretreatment unit 102 has a pretreatment tank 106 that stores water (pretreated water 110) for producing nitrogenous fertilizer (or culture solution). The adjustment unit 104 has an adjustment tank 108 in which fertilizer components and the like are added to the water (pretreated water 110) that has been subjected to a predetermined treatment in the pretreatment tank 106, thereby producing a culture solution 112.
前処理槽１０６と調整槽１０８とは第１配管１１６で接続されている。第１配管１１６には溶液の流れを制御する第１バルブ１２０が設けられる。前処理槽１０６から調整槽１０８への前処理された水（前処理水１１０）の流れは第１バルブ１２０の開閉により制御される。前処理槽１０６から調整槽１０８への前処理水１１０の給水は、図示されないポンプを介して行われてもよいし、２つの槽の水位の高低差を利用して行われてもよい。培養液製造装置１００は制御部１１４を有し、第１バルブ１２０の開閉は制御部１１４から出力される信号によって行われてもよい。また、第１配管１１６には微粒子を除去するためのフィルタ１１８が設けられていてもよい。 The pretreatment tank 106 and the adjustment tank 108 are connected by a first pipe 116. A first valve 120 that controls the flow of the solution is provided in the first pipe 116. The flow of pretreated water (pretreated water 110) from the pretreatment tank 106 to the adjustment tank 108 is controlled by opening and closing the first valve 120. The supply of pretreated water 110 from the pretreatment tank 106 to the adjustment tank 108 may be performed via a pump (not shown), or may be performed by utilizing the difference in water levels between the two tanks. The culture solution production apparatus 100 has a control unit 114, and the opening and closing of the first valve 120 may be controlled by a signal output from the control unit 114. The first pipe 116 may also be provided with a filter 118 for removing fine particles.
前処理槽１０６には処理水供給部１２２から窒素肥料（又は培養液）を製造するための水（原水：処理を行う前の水）が供給される。処理水供給部１２２から供給される原水に限定はなく、河川水又は地下水をはじめ、生活排水の二次処理水、工場排水等様々な水が使用可能である。処理水供給部１２２から供給される原水には重炭酸イオン（ＨＣＯ３ －）が含まれていてもよい。処理水供給部１２２は図示されない原水を貯留する水槽又はタンクと接続されていてもよい。 The pretreatment tank 106 is supplied with water (raw water: water before treatment) for producing nitrogen fertilizer (or culture solution) from a treated water supply unit 122. There are no limitations on the raw water supplied from the treated water supply unit 122, and various types of water can be used, including river water or groundwater, secondary treated water from domestic wastewater, and industrial wastewater. The raw water supplied from the treated water supply unit 122 may contain bicarbonate ions (HCO 3 − ). The treated water supply unit 122 may be connected to a water tank or tank (not shown) for storing raw water.
処理水供給部１２２と前処理槽１０６とは配管で接続され、配管の経路に第１送水ポンプ１３４、第２バルブ１２８が設けられている。第１送水ポンプ１３４の駆動及び第２バルブ１２８の開閉で処理水供給部１２２から前処理槽１０６への原水の供給が制御される。第１送水ポンプ１３４の動作及び第２バルブ１２８の開閉は制御部１１４で制御される。 The treated water supply unit 122 and the pretreatment tank 106 are connected by piping, and a first water pump 134 and a second valve 128 are provided in the piping path. The supply of raw water from the treated water supply unit 122 to the pretreatment tank 106 is controlled by driving the first water pump 134 and opening and closing the second valve 128. The operation of the first water pump 134 and the opening and closing of the second valve 128 are controlled by the control unit 114.
前処理槽１０６は第１薬剤供給部１２４と接続される。第１薬剤供給部１２４は第１薬剤を前処理槽１０６に供給する機能を有している。本実施形態において、第１薬剤は炭酸アンモニウム（（ＮＨ４）２ＣＯ３）であり、第１薬剤供給部１２４からは炭酸アンモニウム水溶液として供給されてもよい。第１薬剤供給部１２４は、図示されない第１薬剤槽と接続され、第１薬剤槽から第１薬剤を供給する構成を有していてもよい。 Pretreatment tank 106 is connected to first chemical supply unit 124. First chemical supply unit 124 has a function of supplying a first chemical to pretreatment tank 106. In the present embodiment, the first chemical is ammonium carbonate ((NH 4 ) 2 CO 3 ), and may be supplied from first chemical supply unit 124 as an aqueous ammonium carbonate solution. First chemical supply unit 124 may be connected to a first chemical tank (not shown) and may be configured to supply the first chemical from the first chemical tank.
第１薬剤供給部１２４と前処理槽１０６は配管で接続される。配管の経路には第２送水ポンプ１３６、第３バルブ１３０が設けられている。第２送水ポンプ１３６の駆動及び第３バルブ１３０の開閉で第１薬剤供給部１２４から前処理槽１０６への第１薬剤の供給が制御される。第２送水ポンプ１３６の動作及び第３バルブ１３０の開閉は制御部１１４で制御される。なお、炭酸アンモニウム粉体を前処理槽１０６に供給する場合には第２送水ポンプ１３６は省略される。 The first chemical supply unit 124 and the pretreatment tank 106 are connected by piping. A second water pump 136 and a third valve 130 are provided in the piping path. The supply of the first chemical from the first chemical supply unit 124 to the pretreatment tank 106 is controlled by driving the second water pump 136 and opening and closing the third valve 130. The operation of the second water pump 136 and the opening and closing of the third valve 130 are controlled by the control unit 114. Note that the second water pump 136 is omitted when ammonium carbonate powder is supplied to the pretreatment tank 106.
前処理槽１０６には第２薬剤供給部１２６が接続されていてもよい。第２薬剤供給部１２６は第２薬剤を前処理槽１０６に供給する機能を有している。第２薬剤は、植物の肥料となる成分を含んでもよく、例えば、炭酸カリウム（Ｋ２ＣＯ３）、炭酸カルシウム（ＣａＣＯ３）、炭酸マグネシウム（ＭｇＣＯ３）等が含まれ得る。第２薬剤供給部１２６は、一つ又は複数の薬剤の供給系統を有し、炭酸カリウム又は炭酸カリウム水溶液、炭酸カルシウム又は炭酸カルシウム水溶液、炭酸マグネシウム及び炭酸マグネシウム水溶液から選ばれた一種又は複数種の水溶液を前処理槽１０６に供給する。第２薬剤供給部１２６は、図示されない第２薬剤槽と接続され、第２薬剤槽から第２薬剤を供給する構成を有していてもよい。 A second chemical supply unit 126 may be connected to the pretreatment tank 106. The second chemical supply unit 126 has the function of supplying a second chemical to the pretreatment tank 106. The second chemical may contain a component that serves as a plant fertilizer, such as potassium carbonate ( K2CO3 ), calcium carbonate ( CaCO3 ), or magnesium carbonate ( MgCO3 ). The second chemical supply unit 126 has one or more chemical supply systems and supplies one or more aqueous solutions selected from potassium carbonate or a potassium carbonate aqueous solution, calcium carbonate or a calcium carbonate aqueous solution, and magnesium carbonate and a magnesium carbonate aqueous solution to the pretreatment tank 106. The second chemical supply unit 126 may be connected to a second chemical tank (not shown) and configured to supply the second chemical from the second chemical tank.
第２薬剤供給部１２６と前処理槽１０６は配管で接続される。配管の経路には第３送水ポンプ１３８、第４バルブ１３２が設けられている。第３送水ポンプ１３８の駆動及び第４バルブ１３２の開閉で第２薬剤供給部１２６から前処理槽１０６への第２薬剤の供給が制御される。第３送水ポンプの動作及び第４バルブ１３２の開閉は制御部１１４で制御される。 The second chemical supply unit 126 and the pretreatment tank 106 are connected by piping. A third water pump 138 and a fourth valve 132 are provided in the piping path. The supply of the second chemical from the second chemical supply unit 126 to the pretreatment tank 106 is controlled by driving the third water pump 138 and opening and closing the fourth valve 132. The operation of the third water pump and the opening and closing of the fourth valve 132 are controlled by the control unit 114.
前処理槽１０６には硝化菌が加えられる。硝化菌は前処理槽１０６の中に直接的に、硝化菌を含む担体と共に、汚泥、又は土壌の中に含ませて提供される。硝化菌は前処理水１１０との体積比で５～２０％、例えば１０％の割合で加えられる。図１は、前処理槽１０６に硝化菌を含む担体１４６が提供されている態様を示す。前処理槽１０６は、硝化菌を含むことにより前処理水１１０に含まれる重炭酸イオンや炭酸アンモニウムの硝化を行うことができる。すなわち、重炭酸イオンや炭酸アンモニウムが含まれる水を硝化菌により硝化させ、アンモニア態窒素を硝酸態窒素へ、重炭酸イオンを二酸化炭素へ変換して窒素肥料成分とすることができる。 Nitrifying bacteria are added to the pretreatment tank 106. The nitrifying bacteria are provided in sludge or soil directly in the pretreatment tank 106 along with a carrier containing the nitrifying bacteria. The nitrifying bacteria are added at a volume ratio of 5 to 20%, for example 10%, to the pretreated water 110. Figure 1 shows an embodiment in which a carrier 146 containing nitrifying bacteria is provided in the pretreatment tank 106. By containing nitrifying bacteria, the pretreatment tank 106 can nitrify the bicarbonate ions and ammonium carbonate contained in the pretreated water 110. In other words, water containing bicarbonate ions and ammonium carbonate can be nitrified by the nitrifying bacteria, converting ammonia nitrogen to nitrate nitrogen and bicarbonate ions to carbon dioxide, which can be used as nitrogen fertilizer components.
前処理槽１０６には、前処理水１１０の中で硝化菌による反応が進むように攪拌機１４０が設けられる。攪拌機１４０の形式に限定はなく、例えば、プロペラ式の攪拌機用いることができる。攪拌機１４０で前処理水１１０を攪拌することにより、硝化反応を促進することができる。また、攪拌機１４０に代えて前処理槽１０６の中に水中ポンプを設置して、槽内で前処理水１１０が循環するようにしてもよい。 The pretreatment tank 106 is provided with an agitator 140 to promote the reaction caused by nitrifying bacteria in the pretreated water 110. There are no limitations on the type of agitator 140; for example, a propeller-type agitator can be used. By agitating the pretreated water 110 with the agitator 140, the nitrification reaction can be promoted. Alternatively, instead of the agitator 140, a submersible pump may be installed in the pretreatment tank 106 to circulate the pretreated water 110 within the tank.
前処理槽１０６には曝気を行う曝気装置１４２が設置されてもよい。曝気装置１４２は空気を送るエアポンプ１４３とエアストーン又はマイクロナノバブルノズル等の微細孔体１４４で構成される。微細孔体１４４は前処理槽１０６の底部に設置されることが好ましい。曝気装置１４２により前処理槽１０６の底部から空気を送り込むことにより、アンモニア性窒素を硝酸性窒素に変え、重炭酸イオンを二酸化炭素に変え、有機物は水と二酸化炭素に酸化する反応を促進することができる。 The pretreatment tank 106 may be equipped with an aeration device 142 for aeration. The aeration device 142 is composed of an air pump 143 for supplying air and a microporous body 144 such as an air stone or a micro-nano bubble nozzle. The microporous body 144 is preferably installed at the bottom of the pretreatment tank 106. By supplying air from the bottom of the pretreatment tank 106 using the aeration device 142, it is possible to convert ammoniacal nitrogen into nitrate nitrogen, bicarbonate ions into carbon dioxide, and promote the oxidation of organic matter to water and carbon dioxide.
前処理槽１０６には前処理水１１０の状態を検出するセンサが設けられる。図１は、前処理槽１０６に設けられるセンサとして、ｐＨセンサ１４８、ＥＣセンサ１５０、水位センサ１５２が設置される例を示す。ｐＨセンサ１４８は前処理水１１０のｐＨ値を測定するために設けられる。前処理槽１０６の前処理水１１０は継続的な硝化反応を維持するため、ｐＨ値が４．５以上６．５以下の範囲に制御されていることが好ましい。ｐＨセンサ１４８は前処理水１１０のｐＨ値をモニタリングすることで、硝化反応を適切な条件下で行うことができる。ｐＨセンサ１４８の計測値は制御部１１４に出力される。 The pretreatment tank 106 is equipped with sensors that detect the state of the pretreated water 110. Figure 1 shows an example in which the sensors installed in the pretreatment tank 106 are a pH sensor 148, an EC sensor 150, and a water level sensor 152. The pH sensor 148 is installed to measure the pH value of the pretreated water 110. To maintain a continuous nitrification reaction, the pH value of the pretreated water 110 in the pretreatment tank 106 is preferably controlled to a range of 4.5 to 6.5. By monitoring the pH value of the pretreated water 110, the pH sensor 148 allows the nitrification reaction to occur under appropriate conditions. The measurement value of the pH sensor 148 is output to the control unit 114.
ＥＣセンサ１５０は前処理水１１０の電気伝導度を測定するために用いられる。ＥＣセンサ１５０で前処理水１１０の電気伝導度を測定することでイオン濃度を評価することができる。また、硝酸イオンセンサ、アンモニアイオンセンサを設け、硝酸イオン、アンモニアイオンを直接的に計測するようにしてもよい。 The EC sensor 150 is used to measure the electrical conductivity of the pretreated water 110. By measuring the electrical conductivity of the pretreated water 110 with the EC sensor 150, the ion concentration can be evaluated. In addition, a nitrate ion sensor and an ammonia ion sensor may be provided to directly measure nitrate ions and ammonia ions.
水位センサ１５２は前処理槽１０６の水位を検出するために設けられる。水位センサ１５２の計測値は制御部１１４に出力される。原水を前処理槽１０６へ供給する場合には、制御部１１４が水位センサ１５２の信号に基づいて処理水供給部１２２の動作を制御し、所定の水位を超えないようにすることができる。 The water level sensor 152 is provided to detect the water level in the pretreatment tank 106. The measurement value of the water level sensor 152 is output to the control unit 114. When raw water is supplied to the pretreatment tank 106, the control unit 114 controls the operation of the treated water supply unit 122 based on the signal from the water level sensor 152 to prevent the water level from exceeding a predetermined level.
調整部１０４には、調整槽１０８の培養液１１２を攪拌する攪拌機１４１、培養液１１２へ肥料成分を添加する養液供給装置１５４、養液供給装置１５４の動作を制御する養液調整装置１５６、水位センサ１５３が設けられる。養液調整装置１５６は、センサ（ｐＨセンサ１４９、ＥＣセンサ１５１）を含む。養液調整装置１５６は、ｐＨセンサ１４９により培養液１１２のｐＨ値を検出し、ＥＣセンサ１５１により培養液１１２の電気伝導度を検出する。養液調整装置１５６は、これらのセンサの計測値に基づいて養液供給装置１５４から、窒素、リン、カリウム、カルシウム、マグネシウム、硫黄、ホウ素、鉄、マンガン、亜鉛、モリブデン、ニッケル、及び銅等の成分を含む肥料成分を培養液１１２に添加する。調整槽１０８には送水口１５８が設けられ、貯留されている培養液１１２が外部に送水される。 The adjustment unit 104 is provided with an agitator 141 that agitates the culture solution 112 in the adjustment tank 108, a nutrient solution supplying device 154 that adds fertilizer components to the culture solution 112, a nutrient solution adjustment device 156 that controls the operation of the nutrient solution supplying device 154, and a water level sensor 153. The nutrient solution adjustment device 156 includes sensors (pH sensor 149, EC sensor 151). The nutrient solution adjustment device 156 detects the pH value of the culture solution 112 using the pH sensor 149 and detects the electrical conductivity of the culture solution 112 using the EC sensor 151. Based on the measured values of these sensors, the nutrient solution adjustment device 156 adds fertilizer components, including components such as nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, boron, iron, manganese, zinc, molybdenum, nickel, and copper, from the nutrient solution supplying device 154 to the culture solution 112. The adjustment tank 108 is provided with a water supply port 158, through which the stored culture solution 112 is supplied to the outside.
制御部１１４は前処理部１０２及び調整部１０４の動作を制御し、前処理水１１０及び培養液１１２のデータを収集する機能を有する。また、制御部１１４は、収集されたデータに基づいて前処理水１１０の処理条件を制御し、培養液１１２の品質を管理する。 The control unit 114 controls the operation of the pretreatment unit 102 and the adjustment unit 104, and has the function of collecting data on the pretreated water 110 and the culture solution 112. The control unit 114 also controls the treatment conditions for the pretreated water 110 based on the collected data, and manages the quality of the culture solution 112.
本実施形態に係る培養液製造装置１００によれば、前処理部１０２で窒素肥料（又は培養液）の製造に使用する水（原水）を硝化菌で処理することで様々な水質の原水を使用することができる。すなわち、原水に重炭酸イオンが含まれていてもこれを二酸化炭素に変換することができる。また、前処理水１１０に含まれる炭酸アンモニウムを硝酸態窒素へ変換して窒素肥料成分とすることができる。これにより、前処理水１１０のｐＨ値の上昇を抑制し、且つ調整部１０４で培養液に肥料成分を加えて調整を行っても沈殿物の生成を抑制することができる。それにより、培養液１１２のｐＨ値の上昇を抑制し、且つ調整槽１０８の中で析出物が生成し配管等の開口部に沈着し目詰まりや閉塞の発生を防ぐことができる。 In the culture solution production apparatus 100 according to this embodiment, raw water of various qualities can be used by treating the water (raw water) used to produce nitrogenous fertilizer (or culture solution) with nitrifying bacteria in the pretreatment unit 102. This means that even if the raw water contains bicarbonate ions, these can be converted to carbon dioxide. Furthermore, ammonium carbonate contained in the pretreated water 110 can be converted to nitrate nitrogen, which is used as a nitrogenous fertilizer component. This prevents an increase in the pH value of the pretreated water 110 and also prevents the formation of precipitates even when fertilizer components are added to the culture solution in the adjustment unit 104. This prevents an increase in the pH value of the culture solution 112 and prevents precipitates from forming in the adjustment tank 108 and depositing in the openings of pipes, etc., causing clogging or blockage.
［第２実施形態］
本実施形態は、第１実施形態に示す培養液製造装置１００の動作と、この装置を用いた重炭酸イオンを含む水の処理方法、この装置により製造される窒素肥料、及び培養液の製造方法について説明する。
Second Embodiment
This embodiment will explain the operation of the culture solution manufacturing apparatus 100 shown in the first embodiment, a method for treating water containing bicarbonate ions using this apparatus, nitrogen fertilizer manufactured by this apparatus, and a method for manufacturing a culture solution.
培養液製造装置１００は、前処理部１０２で窒素肥料（又は培養液）の製造に使用する水（原水）の処理が行われ、調整部１０４で窒素肥料（又は培養液）の調整が行われる。最初に、処理水供給部１２２から前処理槽１０６へ、水が供給される。前処理層１０６へ供給される水は、窒素肥料（又は培養液）の製造に用いる水である。なお、この水は第１実施形態で説明したように様々な種類の水（排水等）を用いることができ、その水には重炭酸イオンが含まれていてもよい。 In the culture solution production apparatus 100, the water (raw water) used to produce nitrogenous fertilizer (or culture solution) is treated in the pretreatment unit 102, and the nitrogenous fertilizer (or culture solution) is adjusted in the adjustment unit 104. First, water is supplied from the treated water supply unit 122 to the pretreatment tank 106. The water supplied to the pretreatment tank 106 is the water used to produce nitrogenous fertilizer (or culture solution). As described in the first embodiment, various types of water (such as wastewater) can be used as this water, and the water may contain bicarbonate ions.
処理水供給部１２２から原水の供給と同時、又は供給後に、第１薬液供給部１２４から炭酸アンモニウム水溶液を前処理槽１０６へ供給する。前処理槽１０６に導入された炭酸アンモニウム及び重炭酸イオンを含む前処理水１１０に対し、硝化菌、硝化菌を含む担体、硝化菌を含む汚泥、又は土壌を体積比で１０％以上加える。なお、硝化菌、硝化菌を含む担体、硝化菌を含む汚泥、又は土壌は予め前処理槽１０６に入れられていてもよい。 Simultaneously with or after the supply of raw water from the treated water supply unit 122, an aqueous ammonium carbonate solution is supplied to the pretreatment tank 106 from the first chemical liquid supply unit 124. Nitrifying bacteria, a carrier containing nitrifying bacteria, sludge containing nitrifying bacteria, or soil are added in an amount of 10% or more by volume to the pretreated water 110 containing ammonium carbonate and bicarbonate ions introduced into the pretreatment tank 106. The nitrifying bacteria, the carrier containing nitrifying bacteria, the sludge containing nitrifying bacteria, or the soil may be placed in the pretreatment tank 106 in advance.
次に、攪拌機１４０を動作させて前処理水１１０を攪拌して硝化菌による硝化反応を促進する。攪拌に変えて曝気装置１４２による曝気を行ってもよい。曝気装置１４２により前処理水１１０を曝気することで硝化菌による硝化反応を促進することができる。また、前処理水１１０を硝化菌と反応させる処理は、攪拌と曝気を同時に、又は攪拌と硝化を交互に行ってもよい。炭酸アンモニウムと重炭酸イオンを含む前処理水１１０に対し、攪拌又は曝気、若しくは攪拌及び曝気を行い、硝化により前処理水１１０に含まれるアンモニウムイオンを硝酸イオンへ変換し、重炭酸イオンを二酸化炭素に変換することができる。 Next, the agitator 140 is operated to agitate the pretreated water 110, promoting the nitrification reaction by the nitrifying bacteria. Aeration using the aeration device 142 may be performed instead of agitation. Aerating the pretreated water 110 using the aeration device 142 can promote the nitrification reaction by the nitrifying bacteria. Furthermore, the process of reacting the pretreated water 110 with the nitrifying bacteria may involve simultaneous agitation and aeration, or alternating between agitation and nitrification. By agitating or aerating, or both agitating and aerating, the ammonium ions contained in the pretreated water 110 can be converted to nitrate ions and the bicarbonate ions can be converted to carbon dioxide through nitrification.
前処理水１１０のｐＨ値はｐＨセンサ１４８で測定し、ｐＨ値が４．５以上６．５以下の範囲内になるように管理する。ｐＨ値が４．５以下になった場合には、第１薬剤供給部１２４から炭酸アンモニウム水溶液を前処理水１１０に加えてｐＨ値を上昇させる。ｐＨ値が６．５以上になった場合は炭酸アンモニウムの添加を中断する。 The pH value of the pretreated water 110 is measured by the pH sensor 148 and is controlled so that the pH value is within the range of 4.5 to 6.5. If the pH value falls below 4.5, an aqueous ammonium carbonate solution is added to the pretreated water 110 from the first chemical supply unit 124 to raise the pH value. If the pH value rises above 6.5, the addition of ammonium carbonate is discontinued.
前処理水１１０の硝化反応はＥＣセンサ１５０（又は硝酸イオンセンサ、アンモニアイオンセンサ）によりモニタリングしてもよい。前処理水１１０の電気伝導度をＥＣセンサ１５０で測定しながら炭酸アンモニウムの添加を行い、ＥＣセンサ１５０の計測値（ＥＣ値）が所定の値になった場合に炭酸アンモニウムの添加を中断することで前処理水１１０の水質を管理することができる。ＥＣセンサ１５０による電気伝導度の管理水準は培養液に設定されるＥＣ値によって決められる。例えば、培養液１１２のＥＣ値を１．５以上２．０以下とする場合には、前処理槽１０６の前処理水１１０のＥＣ値が０．４ｄＳ／ｍになった時点で炭酸アンモニウムの添加が中断される。 The nitrification reaction of the pretreated water 110 may be monitored using an EC sensor 150 (or a nitrate ion sensor or an ammonia ion sensor). The quality of the pretreated water 110 can be controlled by adding ammonium carbonate while measuring the electrical conductivity of the pretreated water 110 with the EC sensor 150, and interrupting the addition of ammonium carbonate when the measured value (EC value) of the EC sensor 150 reaches a predetermined value. The level of electrical conductivity control using the EC sensor 150 is determined by the EC value set in the culture solution. For example, if the EC value of the culture solution 112 is to be between 1.5 and 2.0, the addition of ammonium carbonate is interrupted when the EC value of the pretreated water 110 in the pretreatment tank 106 reaches 0.4 dS/m.
以上のような処理により、重炭酸イオンが含まれている水から、重炭酸イオンを除去することができる。この水の処理方法では、重炭酸イオンが除去された水のｐＨ値を調整することもできる。別言すれば、重炭酸イオンを除去する水に炭酸アンモニウムを添加する際に、炭酸アンモニウムの添加量が過剰にならないように制御することができる。 By using the above-described process, bicarbonate ions can be removed from water containing them. This water treatment method also allows the pH value of the water from which bicarbonate ions have been removed to be adjusted. In other words, when adding ammonium carbonate to water from which bicarbonate ions are to be removed, the amount of ammonium carbonate added can be controlled so that it is not excessive.
前処理槽１０６の前処理水１１０の水位は水位センサ１５２によりモニタリングする。前処理槽１０６の水位が低下した場合には、処理水供給部１２２から原料となる水（原水）が所定の水位となるまで供給される。 The water level of the pretreated water 110 in the pretreatment tank 106 is monitored by a water level sensor 152. If the water level in the pretreatment tank 106 drops, raw water (raw water) is supplied from the treated water supply unit 122 until the water level reaches a predetermined level.
前処理槽１０６でｐＨ値が４．５以上６．５以下に調整された前処理水１１０は調整槽１０８へ移される。調整槽１０８の水位は水位センサ１５３で測定され、所定の水位以下になると前処理水１１０が供給される。第１バルブ１２０の開閉は制御部１１４から出力される信号によって制御される。前処理槽１０６から調整槽１０８への前処理水１１０の給水は第１配管１１６を通して行われる。前処理水１１０の給水は、例えば、前処理槽１０６と調整槽１０８との水位差を利用して行われる。前処理槽１０６と調整槽１０８と間に水位差がある場合、第１バルブ１２０を開くことで、第１配管１１６を通して前処理槽１０６から調整槽１０８へ前処理水１１０が流れ込む。また、ポンプ（図示されない）を用いて前処理槽１０６から前処理水１１０を汲み出す方式を用いてもよい。調整槽１０８は所定の水位になるまで前処理水１１０が供給される。調整槽１０８の水位は水位センサ１５３によりモニタリングされる。 Pretreated water 110, whose pH value has been adjusted to between 4.5 and 6.5 in the pretreatment tank 106, is transferred to the adjustment tank 108. The water level in the adjustment tank 108 is measured by a water level sensor 153, and pretreated water 110 is supplied when the water level falls below a predetermined level. The opening and closing of the first valve 120 is controlled by a signal output from the control unit 114. The pretreated water 110 is supplied from the pretreatment tank 106 to the adjustment tank 108 through the first pipe 116. The pretreated water 110 is supplied, for example, by utilizing the water level difference between the pretreatment tank 106 and the adjustment tank 108. If there is a water level difference between the pretreatment tank 106 and the adjustment tank 108, opening the first valve 120 causes the pretreated water 110 to flow from the pretreatment tank 106 to the adjustment tank 108 through the first pipe 116. Alternatively, a pump (not shown) may be used to pump the pretreated water 110 from the pretreatment tank 106. Pretreated water 110 is supplied to the adjustment tank 108 until a predetermined water level is reached. The water level in the adjustment tank 108 is monitored by a water level sensor 153.
前処理槽１０６から調整槽１０８へ前処理水１１０を給水する場合には、攪拌又は曝気若しく攪拌及び曝気の処理が５分から１０分程度停止され、前処理水１１０の中に浮遊する固形物が沈殿した後に行われる。すなわち、攪拌又は曝気若しく攪拌及び曝気処理後の前処理水１１０の上澄みが調整槽１０８に移される。第１配管１１６には第１フィルタ１１８が設けられているが、前処理水１１０の浮遊物が沈殿しないまま給水すると第１フィルタ１１８が直ぐに目詰まりするので、前述のように所定時間経過した後に行うことが好ましい。 When pretreated water 110 is supplied from the pretreatment tank 106 to the adjustment tank 108, the stirring, aeration, or stirring and aeration process is stopped for approximately 5 to 10 minutes, and the pretreated water 110 is then supplied after the solids suspended in the pretreated water 110 have settled. In other words, the supernatant of the pretreated water 110 after stirring, aeration, or stirring and aeration process is transferred to the adjustment tank 108. A first filter 118 is provided in the first pipe 116, but if the pretreated water 110 is supplied without the suspended matter settling, the first filter 118 will quickly become clogged, so it is preferable to wait a predetermined time, as described above.
水位が低下した前処理槽１０６には処理水供給部１２２から水（原水）が補充される。補充される水（原水）の量は水位センサ１５２によって制御される。水（原水）が補充された後、前処理槽１０６に溜められる前処理水１１０の水質は、ｐＨセンサ１４８、ＥＣセンサ１５０によってモニタリングされ、必要に応じて第１薬剤供給部１２４から炭酸アンモニウムが添加される。ｐＨ値が４．５以下の場合は第１薬剤供給部１２４から炭酸アンモニアが添加され、ｐＨ値が６．５以上になった時点で炭酸アンモニアの添加が中断される。攪拌又は曝気、若しくは攪拌及び曝気の処理は適宜行われる。 When the water level in the pretreatment tank 106 drops, water (raw water) is replenished from the treated water supply unit 122. The amount of replenished water (raw water) is controlled by the water level sensor 152. After the water (raw water) is replenished, the quality of the pretreated water 110 stored in the pretreatment tank 106 is monitored by the pH sensor 148 and EC sensor 150, and ammonium carbonate is added from the first chemical supply unit 124 as needed. If the pH value is 4.5 or below, ammonium carbonate is added from the first chemical supply unit 124, and the addition of ammonium carbonate is discontinued when the pH value reaches 6.5 or above. Agitation or aeration, or both, is performed as appropriate.
調整槽１０８に移された前処理水１１０には炭酸アンモニウムが硝化されて変換された硝酸態窒素が含まれている。したがって、この水溶液を窒素肥料として、又は窒素肥料の原料として用いることができる。 The pretreated water 110 transferred to the adjustment tank 108 contains nitrate nitrogen, which is formed when ammonium carbonate is nitrified. Therefore, this aqueous solution can be used as nitrogen fertilizer or as a raw material for nitrogen fertilizer.
また、調整槽１０８へ移された前処理水１１０へ肥料成分を添加することで植物の栽培に用いる培養液１１２を製造することができる。培養液１１２のｐＨ値やＥＣ値は、養液調整装置１５６に接続されたｐＨセンサ１４９及びＥＣセンサ１５１により計測される。調整槽１０８への肥料成分の添加は、養液供給部１５４により行われる。肥料成分としては窒素、リン、カリウム、カルシウム、マグネシウム、硫黄、ホウ素、鉄、マンガン、
亜鉛、モリブデン、ニッケル、銅から選ばれた一種又は複数種の成分が含まれる。
Furthermore, a culture solution 112 to be used for plant cultivation can be produced by adding fertilizer components to the pretreated water 110 transferred to the adjustment tank 108. The pH value and EC value of the culture solution 112 are measured by a pH sensor 149 and an EC sensor 151 connected to a nutrient solution adjustment device 156. The fertilizer components are added to the adjustment tank 108 by a nutrient solution supply unit 154. The fertilizer components include nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, boron, iron, manganese,
It contains one or more components selected from zinc, molybdenum, nickel, and copper.
本実施形態に示す培養液製造装置１００を用いることで、重炭酸イオンを含む水に炭酸アンモニウムを添加し、硝化菌により硝化することで炭酸アンモニウムを硝酸態窒素に変換し、重炭酸イオンを二酸化炭素に変換し、ｐＨ値を４．５から６．５の範囲内に調整することができる。別言すれば、炭酸アンモニウムを含む水を硝化菌で硝化することで、硝酸態窒素を含む窒素肥料を製造することができ、さらに肥料成分を加えて培養液１１２を製造することができる。また、本実施形態に示す培養液製造装置１００を用いることで、培養液中の陽イオンと結合して析出しやすい炭酸イオン、重炭酸イオンを含む水（原水）から簡易な方法で重炭酸イオンを除去することができ、硝酸やリン酸塩等を使用しないことにより複雑な肥料計算を不要にすることができる。 By using the culture medium production apparatus 100 shown in this embodiment, ammonium carbonate can be added to water containing bicarbonate ions, and nitrification can be performed using nitrifying bacteria to convert the ammonium carbonate to nitrate nitrogen, convert the bicarbonate ions to carbon dioxide, and adjust the pH value to within the range of 4.5 to 6.5. In other words, by nitrifying water containing ammonium carbonate using nitrifying bacteria, nitrogen fertilizer containing nitrate nitrogen can be produced, and fertilizer components can be added to produce the culture medium 112. Furthermore, by using the culture medium production apparatus 100 shown in this embodiment, bicarbonate ions can be easily removed from water (raw water) containing carbonate ions and bicarbonate ions that tend to combine with cations in the culture medium and precipitate. By not using nitric acid, phosphate, etc., complex fertilizer calculations are unnecessary.
前処理槽１０６から移された前処理水１１０は硝化菌で処理されていることにより重炭酸イオンが除去されているので、カルシウム等の肥料成分を添加しても析出物が生成され沈着することを防ぐことができる。また、炭酸アンモニウムが硝酸態窒素に変換されていることで、培養液１１２のｐＨ値を４．５以上６．５以下の範囲内に調整することができ肥効率を維持することができる。また、炭酸アンモニウムを硝酸イオンに変換することにより、アンモニアイオン濃度を低減することができ、アンモニア濃度が高い養液を好まない植物の栽培が可能となる。 The pretreated water 110 transferred from the pretreatment tank 106 has been treated with nitrifying bacteria, which removes bicarbonate ions, preventing the formation and deposition of precipitates even when fertilizer components such as calcium are added. Furthermore, because ammonium carbonate has been converted to nitrate nitrogen, the pH value of the culture solution 112 can be adjusted to a range of 4.5 to 6.5, maintaining fertilizer efficiency. Furthermore, by converting ammonium carbonate to nitrate ions, the ammonia ion concentration can be reduced, making it possible to cultivate plants that do not prefer nutrient solutions with high ammonia concentrations.
［第３実施形態］
図２は、本発明の一実施形態に係る水耕栽培システム１６０を示す。水耕栽培システム１６０は、第１実施形態に示す培養液製造装置１００と植物が栽培される栽培部１６１とを含む。水耕栽培の方式は、大別して湛液型水耕法と薄膜型水耕法の二種類が知られている。図２は、水耕栽培システム１６０の栽培部１６１として湛液型水耕法が適用された一例を示す。勿論、水耕栽培システム１６０として薄膜型水耕法を適用することもできる。第１実施形態で培養液製造装置１００について、第２実施形態で培養液の製造方法について説明されているので、本実施形態では栽培槽１６２に関連する部分を中心に説明を行う。
[Third embodiment]
FIG. 2 shows a hydroponic cultivation system 160 according to one embodiment of the present invention. The hydroponic cultivation system 160 includes the nutrient solution production apparatus 100 shown in the first embodiment and a cultivation section 161 in which plants are cultivated. Hydroponic cultivation methods are broadly classified into two types: submerged hydroponic cultivation and thin film hydroponic cultivation. FIG. 2 shows an example in which submerged hydroponic cultivation is applied to the cultivation section 161 of the hydroponic cultivation system 160. Of course, thin film hydroponic cultivation can also be applied to the hydroponic cultivation system 160. Since the nutrient solution production apparatus 100 was described in the first embodiment and the method for producing a nutrient solution was described in the second embodiment, the following description will focus on the portions related to the cultivation tank 162 in this embodiment.
栽培槽１６２には調整槽１０８から培養液１１２が供給される。培養液１１２は調整槽１０８から栽培槽１６２へポンプ１５７によって供給される。培養液１１２は供給管１６６を通して栽培槽１６２へ供給される。栽培槽１６２の上には栽培用パネル１６４が設置される。栽培する植物２００は、根が栽培槽１６２の中に伸びるように栽培用パネル１６４に並べて栽培される。 The culture tank 162 is supplied with nutrient solution 112 from the adjustment tank 108. The nutrient solution 112 is supplied from the adjustment tank 108 to the culture tank 162 by a pump 157. The nutrient solution 112 is supplied to the culture tank 162 through a supply pipe 166. A cultivation panel 164 is installed above the cultivation tank 162. The plants 200 to be cultivated are lined up on the cultivation panel 164 and grown so that their roots extend into the cultivation tank 162.
図２は、水耕栽培システム１６０が循環型である場合を示す。栽培槽１６２にはオーバーフロー管１６８が設けられており、所定の水位に達した培養液はオーバーフロー管１６８から流れ出し調整槽１０８に循環する水路が形成されている。図示されないが、水路にはオーバーフロー管１６８から流れ出た培養液を一時的に貯留する貯留タンクが設けられていてもよい。なお、図２は、栽培槽１６２が一段である例を示すが、これに限定されず栽培槽１６２が多段に配置されていてもよい。 Figure 2 shows a hydroponic cultivation system 160 of a circulation type. The cultivation tank 162 is provided with an overflow pipe 168, and a waterway is formed in which the culture solution that has reached a predetermined water level flows out of the overflow pipe 168 and circulates to the adjustment tank 108. Although not shown, the waterway may be provided with a storage tank that temporarily stores the culture solution that has flowed out of the overflow pipe 168. Note that while Figure 2 shows an example in which the cultivation tank 162 has one level, this is not limited to this, and the cultivation tanks 162 may be arranged in multiple levels.
調整槽１０８では、養液供給部１５４から水耕栽培に必要な肥料成分が培養液に添加される。また、調整槽１０８では、ｐＨセンサ１４９でｐＨ値が計測され、ＥＣセンサ１５１でＥＣ値が計測され、培養液１１２として適した範囲内になるように水質が管理される。調整槽１０８の水位が低下した場合には、前処理槽１０６から処理済みの前処理水１１０が供給される。このように、調整槽１０８で培養液１１２の水量が管理され、減少分が前処理槽１０６から供給されることで、水耕栽培を連続的に行うことができる。 In the adjustment tank 108, fertilizer components necessary for hydroponic cultivation are added to the culture solution from the nutrient solution supply unit 154. In addition, in the adjustment tank 108, the pH value is measured by the pH sensor 149, and the EC value is measured by the EC sensor 151, and the water quality is managed to stay within an appropriate range for the culture solution 112. If the water level in the adjustment tank 108 drops, treated pretreated water 110 is supplied from the pretreatment tank 106. In this way, the amount of culture solution 112 is managed in the adjustment tank 108, and the reduced amount is supplied from the pretreatment tank 106, allowing hydroponic cultivation to be carried out continuously.
本実施形態に係る水耕栽培システム１６０によれば、培養液の製造に使用する水（原水）を硝化菌で処理することで様々な水質の原水を使用することができる。すなわち、原水に重炭酸イオンが含まれていてもこれを二酸化炭素に変換することができる。また、前処理水１１０に含まれる炭酸アンモニウムを硝酸態窒素へ変換して窒素肥料成分とすることができる。調整部１０４で培養液に肥料成分を加えて培養液１１２製造しても沈殿物の生成を抑制することができる。それにより、調整槽１０８、供給管１６６等の水路の中で析出物が沈着し目詰まりや閉塞の発生を防ぐことができる。 The hydroponic cultivation system 160 according to this embodiment allows raw water of various qualities to be used for producing the culture solution by treating the water (raw water) with nitrifying bacteria. That is, even if the raw water contains bicarbonate ions, these can be converted into carbon dioxide. Furthermore, ammonium carbonate contained in the pretreated water 110 can be converted into nitrate nitrogen, which can be used as a nitrogen fertilizer component. Even when fertilizer components are added to the culture solution in the adjustment unit 104 to produce the culture solution 112, the formation of precipitates can be suppressed. This prevents the deposition of precipitates in water channels such as the adjustment tank 108 and supply pipe 166, causing clogging and blockages.
第２実施形態に示す製造方法で製造された培養液と、通常の培養液を用いて植物を育成したときの培養液のｐＨ値の変化を示す。 This shows the change in pH value of the culture solution when plants are grown using a culture solution produced using the production method described in the second embodiment and a normal culture solution.
水耕栽培は灌液水耕方式により行った。栽培場所は屋内であり、人工照明付きの栽培ラックで行われた。植物としてコンテナレタスを栽培した。培養液として４種類の培養液を用いた。 Hydroponic cultivation was carried out using the irrigation method. The cultivation took place indoors on a cultivation rack with artificial lighting. Container lettuce was grown as the plant. Four types of nutrient solution were used.
培養液と内訳は以下の通りである。
試料Ａ：炭酸アンモニウムから硝酸イオンを生成したものを培養液の調整に使用した培養液
試料Ｂ：最初に炭酸アンモニウムから硝酸イオンを生成したものを用いて培養液の調整を行い、追肥の際は、炭酸アンモニウムを培養液の調整に使用した培養液
試料Ｃ：比較例であり、化成肥料から作製した培養液
試料Ｄ：比較例であり、炭酸アンモニウムを培養液の調整に使用した培養液
The culture medium and its composition are as follows:
Sample A: A culture solution prepared using nitrate ions generated from ammonium carbonate. Sample B: A culture solution prepared using nitrate ions generated from ammonium carbonate first, and then ammonium carbonate was used for top dressing. Sample C: A comparative example, a culture solution prepared using chemical fertilizer. Sample D: A comparative example, a culture solution prepared using ammonium carbonate.
図３に示すグラフは、試料Ａ及び試料Ｂを用いてコンテナレタスを栽培したときの培養液のｐＨ値の変化を示す。図３に示すグラフは、比較例の試料Ｃ及び試料Ｄの結果も同時に示す。栽培期間４３日間に２回の栽培が行われて、第１期は１日から２２日迄、第２期は２２日から４３日迄である。 The graph in Figure 3 shows the change in pH value of the culture solution when container lettuce was grown using Sample A and Sample B. The graph in Figure 3 also shows the results for Comparative Examples Sample C and Sample D. Cultivation was carried out twice over a 43-day cultivation period, with the first period being from the 1st to the 22nd and the second period being from the 22nd to the 43rd.
試料Ａ及び試料Ｂの培養液を用いた場合、コンテナレタスを栽培した第１期及び第２期の期間中においてｐＨ値は５から７の範囲内に収まっており、大幅な変動は確認されていない。一方、比較例である試料Ｃの培養液を用いた場合には、第１期から第２期に移った後にｐＨ値が大幅に増加していることが確認される。また、比較例である試料Ｄの培養液でもｐＨ値の大幅な増加が確認されている。 When the culture solutions of Samples A and B were used, the pH value remained within the range of 5 to 7 during the first and second periods of container lettuce cultivation, with no significant fluctuations observed. On the other hand, when the culture solution of Sample C, a comparative example, was used, a significant increase in the pH value was observed after moving from the first period to the second period. A significant increase in the pH value was also observed in the culture solution of Sample D, a comparative example.
比較例の試料ＣにおけるｐＨ値の大幅な変化は、育成したコンテナレタスが培養液に含まれる特定の成分を多く吸収し、培養液中のイオンバランスが初期の状態から変化した結果であると考えられる。比較例の試料ＣのｐＨ値が７以上に増加する変化は、例えば、培養液中に含まれる硝酸態窒素のような成分が吸収され、根からＯＨ－が排出された結果であると推測される。なお、アンモニア態窒素のような成分が吸収された場合には、根からＨ＋が排出され、ｐＨ値は低下する。一方、実施例の試料Ａ及び試料Ｂの培養液は、硝化菌による硝化によりｐＨ値は４．５以上６．５以下で安定化され、且つ適度なアンモニア態窒素が培養液中に存在することで、植物への硝酸態窒素とアンモニア態窒素の吸収バランスが良いためｐＨ値の急激な変化を防いでいると考えられる。さらに、残留する硝化菌がアンモニア態窒素を硝化およびバッファーとして働くことでｐＨ値の急激な変化を防いでいると考えられる。 The significant change in pH value in Comparative Example Sample C is believed to be the result of the container lettuce growing in the container absorbing a large amount of specific components contained in the nutrient solution, causing a change in the ionic balance in the nutrient solution from its initial state. The increase in pH value to 7 or higher in Comparative Example Sample C is presumably the result of, for example, the absorption of components such as nitrate nitrogen contained in the nutrient solution and the excretion of OH- from the roots. Furthermore, when components such as ammonia nitrogen are absorbed, H + is excreted from the roots, causing the pH value to decrease. On the other hand, the nutrient solutions of Examples Samples A and B stabilized their pH values at 4.5 to 6.5 due to nitrification by nitrifying bacteria. Furthermore, the presence of an appropriate amount of ammonia nitrogen in the nutrient solution is believed to provide a good balance between the absorption of nitrate nitrogen and ammonia nitrogen by the plant, preventing a sudden change in pH value. Furthermore, the remaining nitrifying bacteria nitrified ammonia nitrogen and acted as a buffer, preventing a sudden change in pH value.
このように、本実施例によれば、硝化菌を用いて前処理がされた培養液を用いた場合にｐＨ値の急激な変動が抑制されることが確認された。 As such, this example confirmed that rapid fluctuations in pH value were suppressed when using a culture medium pretreated with nitrifying bacteria.
実施例１で用いた試料Ａ、Ｂの培養液と、比較例である試料Ｃ、Ｄの培養液を４３日間使用した後の析出物の有無を観察した。 The culture media of Samples A and B used in Example 1 and the culture media of Samples C and D used as comparative examples were observed for the presence or absence of precipitates after 43 days of use.
試料Ａ、Ｂの培養液では析出物が確認されずクリアな状態であった。一方、比較例である試料Ｃ、Ｄの培養液には析出物が確認された。この結果より、前処理水を硝化菌で処理することで、炭酸イオンや重炭酸イオンが除去されており、肥料成分との反応による析出物の発生を防ぐことができることが確認された。 No precipitates were observed in the culture broth of samples A and B, and the broth was clear. On the other hand, precipitates were observed in the culture broth of samples C and D, which are comparative examples. These results confirm that treating pretreated water with nitrifying bacteria removes carbonate ions and bicarbonate ions, preventing the formation of precipitates due to reaction with fertilizer components.
以上、実施例１及び実施例２によれば、硝化菌を用いて前処理水に含まれる炭酸アンモニウムや重炭酸イオンを除去することで、培養液のｐＨ値を安定化させ、析出物の生成を防ぐ効果があることが確認された。 As described above, Examples 1 and 2 confirmed that using nitrifying bacteria to remove ammonium carbonate and bicarbonate ions contained in pretreated water stabilizes the pH value of the culture solution and prevents the formation of precipitates.
１００：培養液製造装置、１０２：前処理部、１０４：調整部、１０６：前処理槽、１０８：調整槽、１１０：前処理水、１１２：培養液、１１４：制御部、１１６：第１配管、１１８：第１フィルタ、１２０：第１バルブ、１２２：処理水供給部、１２４：第１薬剤供給部、１２６：第２薬剤供給部、１２８：第２バルブ、１３０：第３バルブ、１３２：第４バルブ、１３４：第１送水ポンプ、１３６：第２送水ポンプ、１３８：第３送水ポンプ、１４０：攪拌機、１４１：攪拌機、１４２：曝気装置、１４３：エアポンプ、１４４：微細孔体、１４６：硝化菌を含む担体、１４８：ｐＨセンサ、１４９：ｐＨセンサ、１５０：ＥＣセンサ、１５１：ＥＣセンサ、１５２：水位センサ、１５３：水位センサ、１５４：養液供給部、１５６：養液調整装置、１５７：ポンプ、１５８：送水口、１６０：水耕栽培システム、１６１：栽培部、１６２：栽培槽、１６４：栽培用パネル、１６６：供給管、１６８：オーバーフロー管、２００：植物
100: culture solution producing apparatus, 102: pretreatment unit, 104: adjustment unit, 106: pretreatment tank, 108: adjustment tank, 110: pretreated water, 112: culture solution, 114: control unit, 116: first piping, 118: first filter, 120: first valve, 122: treated water supply unit, 124: first chemical supply unit, 126: second chemical supply unit, 128: second valve, 130: third valve, 132: fourth valve, 134: first water supply pump, 136: second water supply pump, 138: third water supply pump, 140: agitator, 1 41: Agitator, 142: Aeration device, 143: Air pump, 144: Microporous body, 146: Carrier containing nitrifying bacteria, 148: pH sensor, 149: pH sensor, 150: EC sensor, 151: EC sensor, 152: Water level sensor, 153: Water level sensor, 154: Nutrient solution supply unit, 156: Nutrient solution adjustment device, 157: Pump, 158: Water supply port, 160: Hydroponic cultivation system, 161: Cultivation unit, 162: Cultivation tank, 164: Cultivation panel, 166: Supply pipe, 168: Overflow pipe, 200: Plant
Claims (10)
前記第１の段階を経た水に、窒素、リン、カリウム、カルシウム、マグネシウム、硫黄、ホウ素、鉄、マンガン、亜鉛、モリブデン、ニッケル、および銅から選ばれた少なくとも１種の元素を含む肥料成分を添加する第２の段階と、を含む培養液の製造方法。 a first stage of nitrifying water containing bicarbonate ions and ammonium carbonate to convert ammonia nitrogen contained in the water into nitrate nitrogen and bicarbonate ions into carbon dioxide;
a second step of adding a fertilizer component containing at least one element selected from nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, boron, iron, manganese, zinc, molybdenum, nickel, and copper to the water that has been subjected to the first step.
前記前処理部から供給された水に、窒素、リン、カリウム、カルシウム、マグネシウム、硫黄、ホウ素、鉄、マンガン、亜鉛、モリブデン、ニッケル、および銅から選ばれた少なくとも１種の元素を含む肥料成分を添加する調整部と、を含む培養液製造装置。 a pre-treatment section that nitrifies water containing bicarbonate ions and ammonium carbonate to convert ammonia nitrogen contained in the water into nitrate nitrogen and bicarbonate ions into carbon dioxide;
and an adjusting unit that adds a fertilizer component containing at least one element selected from nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, boron, iron, manganese, zinc, molybdenum, nickel, and copper to the water supplied from the pretreatment unit.
植物を栽培する栽培槽と、
を含み、
前記栽培槽に前記調整部から培養液が供給される、ことを特徴とする栽培システム。
The culture solution producing apparatus according to any one of claims 5 to 9,
a cultivation tank for cultivating plants;
Including,
A cultivation system, characterized in that a culture solution is supplied to the cultivation tank from the adjustment unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2024195136A JP7770514B2 (en) | 2021-03-04 | 2024-11-07 | Culture medium manufacturing method, culture medium manufacturing device, and cultivation system including the culture medium manufacturing device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021034226A JP7593834B2 (en) | 2021-03-04 | 2021-03-04 | Method for treating water containing bicarbonate ions, method for producing nitrogenous fertilizer using said method, method for producing culture solution, culture solution producing device, and cultivation system including culture solution producing device |
| JP2024195136A JP7770514B2 (en) | 2021-03-04 | 2024-11-07 | Culture medium manufacturing method, culture medium manufacturing device, and cultivation system including the culture medium manufacturing device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2021034226A Division JP7593834B2 (en) | 2021-03-04 | 2021-03-04 | Method for treating water containing bicarbonate ions, method for producing nitrogenous fertilizer using said method, method for producing culture solution, culture solution producing device, and cultivation system including culture solution producing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2025016754A JP2025016754A (en) | 2025-02-04 |
| JP7770514B2 true JP7770514B2 (en) | 2025-11-14 |
Family
ID=83232264
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2021034226A Active JP7593834B2 (en) | 2021-03-04 | 2021-03-04 | Method for treating water containing bicarbonate ions, method for producing nitrogenous fertilizer using said method, method for producing culture solution, culture solution producing device, and cultivation system including culture solution producing device |
| JP2024195136A Active JP7770514B2 (en) | 2021-03-04 | 2024-11-07 | Culture medium manufacturing method, culture medium manufacturing device, and cultivation system including the culture medium manufacturing device |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2021034226A Active JP7593834B2 (en) | 2021-03-04 | 2021-03-04 | Method for treating water containing bicarbonate ions, method for producing nitrogenous fertilizer using said method, method for producing culture solution, culture solution producing device, and cultivation system including culture solution producing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (2) | JP7593834B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011240254A (en) | 2010-05-18 | 2011-12-01 | Ariake Japan Co Ltd | Production of ammonia from nitrogen-containing organic waste, and hydroponic culture using the ammonia as fertilizer component |
| JP2012034649A (en) | 2010-08-10 | 2012-02-23 | Mebiol Kk | Plant cultivation system and plant cultivation method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4245433A (en) * | 1979-06-12 | 1981-01-20 | Sjostedt Ernst H S | Method and apparatus of growing plants without soil |
| JPS57150492A (en) * | 1981-03-10 | 1982-09-17 | Ebara Infilco Co Ltd | Removing method for phosphorus and nitrogen in waste water |
| JPS60196130A (en) * | 1984-03-19 | 1985-10-04 | 株式会社同和 | Plant growing method and apparatus |
| JPS62115222A (en) * | 1985-11-15 | 1987-05-26 | 株式会社イナックス | Plant for growing fishes and plant |
| JPH06170390A (en) * | 1992-12-11 | 1994-06-21 | Meidensha Corp | Its control method in anaerobic aerobic activated sludge process |
| JPH0952099A (en) * | 1995-06-06 | 1997-02-25 | Taiyo Kagaku Kogyo Kk | Method and apparatus for treating waste fluid |
| NL1005343C1 (en) * | 1996-08-23 | 1998-02-26 | Univ Delft Tech | Method for treating waste water containing ammonia. |
| WO2020237283A1 (en) * | 2019-05-24 | 2020-12-03 | The University Of Queensland | Method for treating wastewater or sludge |
-
2021
- 2021-03-04 JP JP2021034226A patent/JP7593834B2/en active Active
-
2024
- 2024-11-07 JP JP2024195136A patent/JP7770514B2/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011240254A (en) | 2010-05-18 | 2011-12-01 | Ariake Japan Co Ltd | Production of ammonia from nitrogen-containing organic waste, and hydroponic culture using the ammonia as fertilizer component |
| JP2012034649A (en) | 2010-08-10 | 2012-02-23 | Mebiol Kk | Plant cultivation system and plant cultivation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2022134811A (en) | 2022-09-15 |
| JP7593834B2 (en) | 2024-12-03 |
| JP2025016754A (en) | 2025-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Le Corre et al. | Phosphorus recovery from wastewater by struvite crystallization: A review | |
| Schumacher et al. | Bacteria reduction and nutrient removal in small wastewater treatment plants by an algal biofilm | |
| EP2139313B1 (en) | Method for the conversion of fish waste from aquaculture systems to methane via a modified uasb reactor | |
| EP2740713B1 (en) | Method for starting up and controlling a biological process for ammonium removal by the action of autotrophic bacteria in wastewater | |
| US20180029914A1 (en) | Removal and Recovery of Phosphate from Liquid Streams | |
| AU2018335227B2 (en) | Decoupled multi-trophic production facility with bio reactor unit | |
| Novikov et al. | Wastewater treatment and disposal of individual residential buildings in agriculture | |
| CN109231448A (en) | A kind of device and its operation method of fast realizing anaerobic ammonium oxidation granulation | |
| JP7770514B2 (en) | Culture medium manufacturing method, culture medium manufacturing device, and cultivation system including the culture medium manufacturing device | |
| JP2008200637A (en) | Water treatment plant, water treatment facility, and water treating method | |
| Radev et al. | pH control during the struvite precipitation process of wastewaters | |
| JP2013202511A (en) | Removing device and removing method of nitrogen and phosphorus | |
| KR102535653B1 (en) | Mixed-coupled aquaponics system | |
| JP2007054726A (en) | Wastewater treatment method and apparatus | |
| ES3050311T3 (en) | Rapid granulation for the start-up of a wastewater treatment system | |
| JP3858271B2 (en) | Wastewater treatment method and apparatus | |
| JPS6228720B2 (en) | ||
| KR102782095B1 (en) | Wastewater treatment system using constructed wetland capable of injecting carbon sources for denitrification | |
| Al-Shammari et al. | Removal of nitrogen and phosphorus from saline wastewater using up-flow sludge blanket filtration process | |
| Kenney | Development of Membrane Assisted Recovery of Solids (MARS) Technology for Nutrient Management in Decentralized Wastewater Treatment Systems | |
| JP2026058395A (en) | Wastewater mixing system | |
| KR20240140664A (en) | Apparatus and Method of Removing Nitrogen and Phosphorus Using Nitrifying Microorganism Culture Tank and Denitrification Accelerator Tank | |
| Turan et al. | Performance of a flat-sheet submerged membrane bioreactor during long-term treatment of municipal wastewater | |
| Shenoy et al. | Sludge for Hydroponic Farming System | |
| Fauza Setiani et al. | Bench scale study of moving bed biofilm reactor application as pre-treatment of raw water for water treatment plant (Case study: Pesanggrahan River) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20241107 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20251010 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20251028 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20251104 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 7770514 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |