JP3295147B2 - Water treatment method - Google Patents
Water treatment methodInfo
- Publication number
- JP3295147B2 JP3295147B2 JP29653392A JP29653392A JP3295147B2 JP 3295147 B2 JP3295147 B2 JP 3295147B2 JP 29653392 A JP29653392 A JP 29653392A JP 29653392 A JP29653392 A JP 29653392A JP 3295147 B2 JP3295147 B2 JP 3295147B2
- Authority
- JP
- Japan
- Prior art keywords
- adsorbent
- layer
- nitrogen
- water
- treatment method
- 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.)
- Expired - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 34
- 238000011282 treatment Methods 0.000 title claims description 26
- 238000000034 method Methods 0.000 title claims description 21
- 239000003463 adsorbent Substances 0.000 claims description 44
- 239000000463 material Substances 0.000 claims description 23
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 14
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 14
- 229910052698 phosphorus Inorganic materials 0.000 claims description 14
- 239000011574 phosphorus Substances 0.000 claims description 14
- 241000196324 Embryophyta Species 0.000 claims description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 4
- 239000011707 mineral Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 230000001580 bacterial effect Effects 0.000 claims 2
- 239000010410 layer Substances 0.000 description 45
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 27
- 241000894006 Bacteria Species 0.000 description 14
- 229910052757 nitrogen Inorganic materials 0.000 description 10
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 7
- 229910001873 dinitrogen Inorganic materials 0.000 description 7
- 239000010802 sludge Substances 0.000 description 7
- 239000002689 soil Substances 0.000 description 6
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical compound [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 239000010457 zeolite Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 108010082455 Sebelipase alfa Proteins 0.000 description 3
- 229910021536 Zeolite Inorganic materials 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000003610 charcoal Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 3
- 239000000852 hydrogen donor Substances 0.000 description 3
- 229940041615 kanuma Drugs 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 240000000599 Lentinula edodes Species 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 235000015097 nutrients Nutrition 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000010902 straw Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 241001148470 aerobic bacillus Species 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- -1 and at the same time Substances 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000012792 core layer Substances 0.000 description 1
- 239000010840 domestic wastewater Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004172 nitrogen cycle Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Water Treatment By Sorption (AREA)
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、水中に溶存している窒
素を生物学的に除去するのための水処理方法に関する。The present invention relates to a water treatment method for biologically removing nitrogen dissolved in water.
【０００２】[0002]
【従来の技術】水中での窒素の存在形態には、通常、硝
酸態窒素（ＮＯ3 - ）とアンモニア態窒素（ＮＨ4 + ）
がある。しかし、溶存酸素が十分にある条件下において
は、アンモニア態窒素は速やかに酸化を受けて硝酸態窒
素に変わってしまうため、硝酸態窒素がその殆どを占め
ることになる。この内、アンモニア態窒素は例えばゼオ
ライトのような吸着材により吸着除去できるが、硝酸態
窒素については適当な吸着材がなく、その他の物理・化
学的処理か又は生物学的処理を必要とする。2. Description of the Related Art Nitrogen in water generally includes nitrate nitrogen (NO 3 − ) and ammonia nitrogen (NH 4 + ).
There is. However, under the condition that the dissolved oxygen is sufficient, the ammonia nitrogen is quickly oxidized and changed to the nitrate nitrogen, and the nitrate nitrogen occupies most of it. Among them, ammonia nitrogen can be adsorbed and removed by an adsorbent such as zeolite, but nitrate nitrogen does not have a suitable adsorbent and requires other physical / chemical treatment or biological treatment.
【０００３】ＢＯＤ等の除去に生物学的処理を用いる場
合には窒素の除去についても生物学的処理を用いるのが
好ましいことになるが、この生物学的処理として従来よ
り知られている窒素の除去法は、脱窒菌を利用するもの
で、硝酸態窒素を脱窒菌により窒素ガス（Ｎ2 ）として
除去するようにされている（例えば、特開昭４９−６９
５４３号）。When a biological treatment is used for removing BOD or the like, it is preferable to use a biological treatment for the removal of nitrogen. However, a nitrogen treatment conventionally known as this biological treatment is used. The removal method uses a denitrifying bacterium, and nitrate nitrogen is removed as nitrogen gas (N 2 ) by the denitrifying bacterium (for example, see Japanese Patent Application Laid-Open No. 49-69).
No. 543).
【０００４】この脱窒菌による方法で最も問題になるの
は脱窒菌の処理効率及びそれに伴う処理の経済性であ
る。即ち、アルコールや酢酸等の水素供与体を処理対象
水に加えてやることにより比較的高い処理効率が得られ
るものの、ランニングに多大なコストを要してしまう。
一方、水素供与体を外部的に与えない場合には処理効率
が低くなるため大規模な設備、それに伴う広大な敷地を
必要とする。さらに、脱窒菌の場合には最適水温が３７
℃と高温であり、処理効率を十分に確保するためには加
熱及び高度の保温を必要とする。What is most problematic in the method using the denitrifying bacteria is the treatment efficiency of the denitrifying bacteria and the economic efficiency of the treatment. That is, although a relatively high treatment efficiency can be obtained by adding a hydrogen donor such as alcohol or acetic acid to the water to be treated, a large cost is required for running.
On the other hand, if the hydrogen donor is not provided externally, the treatment efficiency will be low, so a large-scale facility and a correspondingly large site will be required. Furthermore, in the case of denitrifying bacteria, the optimal water temperature is 37
The temperature is as high as ° C., and heating and high heat retention are required to ensure sufficient treatment efficiency.
【０００５】このような処理効率の問題について、例え
ば、特開昭５３−６９４５９号、特開昭５３−１９６７
２号、特開昭５３−８５９４７号、特開昭６１−１２９
０８６号、特開平４−７０９９号等に種々の技術が開示
されている。これらの従来技術では、それぞれ種々の工
夫を施すことにより、高い処理効率の確保とランニング
コストの低減を図っている。[0005] Regarding the problem of such processing efficiency, for example, Japanese Patent Application Laid-Open No. 53-69459 and Japanese Patent Application Laid-Open No. 53-1967
No. 2, JP-A-53-85947, JP-A-61-129
No. 086, Japanese Patent Application Laid-Open No. 4-7099 and the like disclose various techniques. In these prior arts, various measures are taken to ensure high processing efficiency and reduce running costs.
【０００６】しかし、これらの技術は何れも何らかのか
たちで複雑な処理過程や制御等を必要としており、その
結果、設備費の増大を招き、またランニングコストの低
減率も必ずしも満足のゆくものとはなっていない。However, all of these techniques require complicated processing steps, controls, and the like in some form, resulting in an increase in equipment costs and a reduction rate of running costs is not always satisfactory. is not.
【０００７】[0007]
【発明が解決しようとする課題】本発明は、このような
事情を背景になされたもので、水中に溶存している窒素
を簡単な設備で、しかも多くのランニングコストを必要
とすることなく効率的に除去できる水処理方法の提供を
目的としている。SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing circumstances, and has been proposed to reduce nitrogen dissolved in water with a simple facility and without requiring much running cost. The purpose is to provide a water treatment method that can be removed efficiently.
【０００８】[0008]
【課題を解決するための手段】本発明による水処理方法
は、細菌の資化物を充填した資化物層を設けると共に、
アンモニア態窒素の吸着が可能な吸着材を充填した吸着
材層を資化物層に連続状態で設け、そして資化物層から
吸着材層に向けて移動するように処理対象水を供給する
ようにしてなっている。According to the water treatment method of the present invention, an assimilate layer filled with assimilable bacteria is provided.
An adsorbent layer filled with an adsorbent capable of adsorbing ammonia nitrogen is provided in a continuous manner on the material layer, and the water to be treated is supplied so as to move from the material layer toward the material layer. Has become.
【０００９】この水処理方法では、資化物層が高度な嫌
気条件を形成するもので、この高度な嫌気条件は、資化
物の水中への浸漬さらにはこの資化物を利用して一時的
に繁殖する好気性菌による酸素の消費により形成され
る。そして、高度な嫌気条件にある資化物層において硝
酸態窒素は併存する３種類の過程により、アンモニア態
窒素及び窒素ガス（Ｎ2 ）に変換される。In this water treatment method, the material layer forms a high anaerobic condition, and the high anaerobic condition is that the material is immersed in water and is temporarily propagated by using the material. Formed by the consumption of oxygen by aerobic bacteria. Then, nitrate nitrogen is converted into ammonia nitrogen and nitrogen gas (N 2 ) in the assimilate layer under highly anaerobic conditions by three types of coexisting processes.
【００１０】アンモニア態窒素への変換は、資化物層で
その嫌気条件と資化物を利用して繁殖する硝酸還元能を
有する細菌の生物活動に基づく還元、及び資化物層にお
ける高度な無酸素条件つまり高い還元レベルによる純化
学的な還元により進行する。これらの還元過程はＮＯ3
- →ＮＯ2 - →Ｎ2 Ｏ→ＮＨ4 - として示される。一
方、窒素ガス（Ｎ2 ）への変換は、同じく資化物層でそ
の嫌気条件と資化物を利用して繁殖する脱窒菌によりな
され、ＮＯ3 - ＋５Ｈ（水素供与体）→0.5Ｎ2 ＋２Ｈ
2 Ｏ＋ＯＨ- として示される。[0010] The conversion to ammonia nitrogen is carried out by reducing the anaerobic conditions in the assimilate layer and the biological activity of the bacteria having a nitrate reducing ability which propagates by utilizing the assimilates, and the high anoxic conditions in the assimilate layer. That is, it proceeds by pure chemical reduction at a high reduction level. These reduction processes involve NO 3
- → NO 2 - → N 2 O → NH 4 - shown as. On the other hand, the conversion to nitrogen gas (N 2 ) is also carried out by denitrifying bacteria that breed using the anaerobic conditions and assimilates in the assimide layer, and NO 3 − + 5H (hydrogen donor) → 0.5N 2 + 2H
Shown as 2 O + OH − .
【００１１】以上のようにして資化物層において生じた
アンモニア態窒素は、資化物層を通過することにより溶
存酸素量が低下している水流に乗ってそのまま吸着材層
に移動すると同時に吸着材層の吸着材に再溶解すること
のない状態で吸着される。一方、窒素ガスは大気中に放
出する。ここで、本明細書においては「吸着」とは、狭
義の“吸着”だけでなく何らかのかたちでアンモニア態
窒素を水中から不可逆的に取り去る現象も含む広い意味
で用いている。The ammonia nitrogen generated in the assimilate layer as described above moves to the adsorbent layer as it is on the water stream having a reduced dissolved oxygen amount by passing through the assimilate layer, and at the same time, adsorbent layer Is adsorbed without being redissolved in the adsorbent. On the other hand, nitrogen gas is released into the atmosphere. In this specification, "adsorption" is used in a broad sense including not only "adsorption" in a narrow sense but also a phenomenon of irreversibly removing ammonia nitrogen from water in some form.
【００１２】このように併存する３種類の処理の同時進
行的な利用により、複雑な処理過程や外的操作を用いな
くとも、つまり極めて簡単な設備構造で十分な処理効率
を確保することができる。この結果、処理効率の向上の
ために種々の外的操作やそのための設備を必要としてい
る従来法に較べ大幅に設備の簡易化を図れ、またランニ
ングコストについても従来法に較べ大幅に低減できる。
特に、ランニングコストについては、本方法では飽和し
た吸着材の交換がその主な要素となるが、この吸着材も
全窒素について使用されるのではなく、一部が窒素ガス
となった残りのアンモニア態窒素について使用されるも
のであるからより長時間の使用が可能となっておりその
分、ランニングコストが低くて済む。さらに、硝酸還元
用の細菌の場合には１５℃程度の比較的低温状態でも十
分に活動性を示すので、加熱や高度な保温を必要としな
いと言う点でも経済性に優れている。As described above, the simultaneous use of the three types of coexisting processes makes it possible to secure sufficient processing efficiency without using complicated processing steps or external operations, that is, with an extremely simple facility structure. . As a result, the equipment can be greatly simplified as compared with the conventional method which requires various external operations and equipment for improving the processing efficiency, and the running cost can be significantly reduced as compared with the conventional method.
In particular, regarding the running cost, the replacement of a saturated adsorbent is the main factor in this method, but this adsorbent is not used for all nitrogen, but the remaining ammonia partially nitrogen gas is used. Since it is used for nitrogen gas, it can be used for a longer time, and the running cost can be reduced accordingly. Further, in the case of bacteria for reducing nitrate, they exhibit sufficient activity even at a relatively low temperature of about 15 ° C., so that they are economically excellent in that heating and high heat retention are not required.
【００１３】資化物層に用いる資化物には、単に細菌の
栄養源となるだけでなく、細菌にとって好ましい住処を
与えることができるものを用いる。そのようなものとし
ては、植物の枯死体が最適である。即ち、植物の枯死体
は、細菌の栄養源に適した有機物を多量に含むと共にそ
の微細孔隙構造により細菌にとって快適な住処を提供す
るからである。また、植物の枯死体の利用は、その入手
が経済的な意味も含めて容易であるという利点の他に、
例えば稲藁や古畳、あるいは使用済みの椎茸のほた木、
さらに枝打ちした枯枝等の有効利用にもつながるという
利点もある。[0013] As the assimilates used in the assimilatory layer, those which can provide a favorable place for bacteria as well as being a nutrient source of bacteria are used. As such, dead bodies of plants are most suitable. That is, the dead body of the plant contains a large amount of organic matter suitable for the nutrient source of the bacterium and provides a comfortable place for the bacterium due to its microporous structure. In addition, the utilization of dead bodies of plants is easy, in addition to the advantage of obtaining economical meanings,
For example, rice straw, old tatami mats, or used shiitake mushroom firewood,
Further, there is an advantage that it also leads to effective use of pruned dead branches and the like.
【００１４】吸着材層の吸着材にはアンモニア態窒素を
吸着可能なものが用いられるが、そのようものとして
は、例えばゼオライト（沸石）やバーミュキュライトの
ような鉱物性のものが最適である。特に、吸着材はその
吸着能が飽和すると交換する必要があるが、飽和した吸
着材はアンモニア態窒素を多量に含むことになるのでこ
れを自然の窒素循環系に返してやるのが好ましく、その
場合に鉱物質であればこれを土壌に戻すことにより窒素
循環系への再帰を容易に行なえる。As the adsorbent of the adsorbent layer, a substance capable of adsorbing ammonia nitrogen is used. As such an adsorbent, for example, a mineral substance such as zeolite (zeolites) or vermiculite is most suitable. is there. In particular, the adsorbent must be replaced when its adsorption capacity is saturated.However, since the saturated adsorbent contains a large amount of ammonia nitrogen, it is preferable to return this to the natural nitrogen circulation system. If it is a mineral, it can be easily returned to the nitrogen cycle by returning it to the soil.
【００１５】以上のような脱窒システムについては、吸
着材層の上にさらにリンを吸着可能な吸着材によるリン
吸着材層を設けるようにすれば、脱窒と同時に脱リンも
行なえ、より効率的な処理を行なえる。リン吸着材とし
ては、例えば、鹿沼土のような火山灰土が優れた吸着能
を持つものとして知られているが、これらは水溶傾向が
高いため徐々に汚泥化して汚泥量の増大を招くという欠
点がある。そこで、本発明では汚泥化せずしかも十分な
吸着能を有する吸着材を新たに幾つか開発し、これを用
いるようにしている。具体的には、例えば骨炭や多孔質
の鉱物のような基材にアルミニウム及び鉄をコーティン
グしたもの、また鹿沼土に腐蝕酸、及びセメントを所定
の配合で加えて粗粒状に形成したものがその例である。In the denitrification system as described above, if a phosphorus adsorbent layer made of an adsorbent capable of adsorbing phosphorus is further provided on the adsorbent layer, denitrification can be performed simultaneously with denitrification, so that more efficiency can be achieved. Process can be performed. As a phosphorus adsorbent, for example, volcanic ash soil such as Kanuma soil is known to have excellent adsorption capacity, but these have a disadvantage that they are gradually sludged due to their high tendency to be water-soluble, thereby increasing the amount of sludge. There is. Therefore, in the present invention, some new adsorbents which do not become sludge and have a sufficient adsorbing ability have been developed and used. Specifically, for example, those obtained by coating aluminum and iron on a base material such as bone charcoal and porous minerals, and those formed by adding corrosive acid and cement to Kanuma soil in a predetermined composition to form coarse particles. It is an example.
【００１６】[0016]
【実施例】以下、本発明の実施例を説明する。この実施
例は、ＢＯＤやＳＳも含めて総合的に水を処理するため
のシステムの一部に応用した例で、例えばＢＯＤ負荷が
平均で５０mg／リットル程度、ＳＳ負荷が２５mg／リッ
トル程度、全窒素が0.7 mg／リットル程度、全リンが0.
5mg ／リットル程度と比較的汚濁程度が低く、雨水共用
の水路を通して近隣の河川に放流されている生活排水を
水路からバイパスして連続的に処理するものとして設計
されている。Embodiments of the present invention will be described below. This embodiment is an example in which the present invention is applied to a part of a system for comprehensively treating water including BOD and SS. For example, a BOD load is about 50 mg / liter on average, an SS load is about 25 mg / liter, and a total load is about 25 mg / liter. Nitrogen is about 0.7 mg / liter, total phosphorus is 0.
It is designed to continuously treat domestic wastewater discharged to nearby rivers through a waterway shared by rainwater, with a relatively low pollution level of about 5 mg / liter, bypassing the waterway.
【００１７】処理装置全体は、図２に示すように、第１
沈澱槽１、第２沈澱槽２、ろ材接触ろ過槽３、礫間接触
槽４、段差式水路５、キト酸木炭ろ過槽６、及び窒素リ
ン除去槽７を連続的に設けてなっており、処理対象水を
第１沈澱槽１から窒素リン除去槽７まで連続的に流下さ
せることができるようにされている。[0017] As shown in FIG.
A sedimentation tank 1, a second sedimentation tank 2, a filter medium contact filtration tank 3, a gravel contact tank 4, a stepped waterway 5, a chito acid charcoal filtration tank 6, and a nitrogen phosphorus removal tank 7 are provided continuously. The water to be treated can be continuously flowed down from the first precipitation tank 1 to the nitrogen and phosphorus removal tank 7.
【００１８】第１沈澱槽１及び第２沈澱槽２はＳＳの沈
澱除去を行ない、またろ材接触ろ過槽３からキト酸木炭
ろ過槽６までの間でＢＯＤの分解除去を行なうが、その
設計基準は、キト酸木炭ろ過槽６の出口でＢＯＤ負荷が
２０〜３０mg／リットル程度となるようにされている。
このようにしたのは、総合的処理という意味もあるが、
特に本発明による水処理方法との関係では、ＢＯＤ負荷
が３０mg／リットル以上であると窒素リン除去槽７にお
ける後述の各層における目詰まりの程度が大きくなり、
その効率が低下し、また耐用時間が短くなってしまうか
らである。従って、例えば湖沼や池の水あるいは大きな
河川の水のようにＢＯＤ負荷が一般に１０mg／リットル
前後の水の場合には、これに直接的に本発明による水処
理方法を適用できる。The first sedimentation tank 1 and the second sedimentation tank 2 perform the precipitation and removal of SS, and the BOD is decomposed and removed between the filter medium contact filtration tank 3 and the chitoacid charcoal filtration tank 6. The BOD load at the outlet of the chitoacid charcoal filter tank 6 is about 20 to 30 mg / liter.
Although this has the meaning of comprehensive processing,
In particular, in relation to the water treatment method according to the present invention, when the BOD load is 30 mg / liter or more, the degree of clogging in each layer described later in the nitrogen phosphorus removal tank 7 increases,
This is because the efficiency is reduced and the service life is shortened. Therefore, in the case of water having a BOD load of generally about 10 mg / liter such as water from lakes and ponds or water from large rivers, the water treatment method according to the present invention can be directly applied thereto.
【００１９】窒素リン除去槽７は、図１に示すように、
例えばコンクリートやＦＲＰを用いて形成した槽枠１０
内に下から順に汚泥ピット１２、主資化物層１３、第１
吸着材層１４、補助資化物層１５、第２吸着材層１６及
びリン吸着材層１７を形成してなるもので、縦方向で側
面に形成された給水路１８を介して主資化物層１３の下
面から上向流となるようにして処理対象水を供給する上
向流タイプとされている。As shown in FIG. 1, the nitrogen / phosphorus removal tank 7
For example, a tank frame 10 formed using concrete or FRP
Sludge pit 12, main material layer 13, first in
An adsorbent layer 14, an auxiliary adsorbent layer 15, a second adsorbent layer 16, and a phosphorus adsorbent layer 17 are formed, and the main adsorbent layer 13 is formed through a water supply channel 18 formed on a side surface in the vertical direction. Is an upward flow type in which the water to be treated is supplied so as to flow upward from the lower surface of the water.
【００２０】主資化物層１３及び補助資化物層１５は、
何れも、植物の枯死体を適度の通水性が得られる密度に
充填して形成されている。具体的には、例えば藁を筵の
ような構造として用いた表皮層１３ｓの間に古畳の芯や
枯枝あるいは椎茸のほた木等を適度な大きさに砕いたも
のをコア層１３ｃとして充填して形成されている。これ
らの主資化物層１３及び補助資化物層１５は処理対象水
に浸漬することにより高度に嫌気化し、これに伴って前
述のように硝酸態窒素のアンモニア態窒素及び窒素ガス
への変換を生じる。The main material layer 13 and the auxiliary material layer 15 are
In each case, the dead body of the plant is filled to a density that allows appropriate water permeability. Specifically, for example, the core layer 13c is obtained by crushing an old tatami mat core, dead branches, shiitake mushrooms or the like into an appropriate size between the skin layers 13s using straw as a straw-like structure. It is formed by filling. The main material layer 13 and the auxiliary material layer 15 are highly anaerobic by being immersed in the water to be treated, thereby causing the conversion of nitrate nitrogen to ammonia nitrogen and nitrogen gas as described above. .
【００２１】ここで、補助資化物層１５は主資化物層１
３において処理漏れとなった分をさらに処理することに
より処理レベルをより高くするためのもので、通常は必
ずしも設ける必要はない。Here, the auxiliary material layer 15 is the main material layer 1
In order to further increase the processing level by further processing the part that has been left out of the processing in step 3, it is not always necessary to provide the processing level.
【００２２】第１、第２の各吸着材層１４、１６は、主
資化物層１３及び補助資化物層１５のそれぞれで生じた
アンモニア態窒素を酸化が生じる前に吸着して除去する
ためのもので、吸着材として礫状のゼオライトを充填し
て形成されている。この吸着材は、その能力が飽和する
と交換され、使用済みのものは、多量のアンモニア態窒
素を保持しているので、細粒に砕いて肥料や土壌改良材
あるいは園芸用材として有効に利用することができる。The first and second adsorbent layers 14 and 16 are for adsorbing and removing ammonia nitrogen generated in each of the main material layer 13 and the auxiliary material layer 15 before oxidation occurs. It is formed by filling a zeolite in the form of gravel as an adsorbent. This adsorbent is exchanged when its capacity is saturated, and the used one retains a large amount of ammonia nitrogen, so it can be broken up into fine particles and used effectively as fertilizer, soil improvement material or horticultural material. Can be.
【００２３】リン吸着材層１７は、処理対象水からリン
を除去するためのもので、鹿沼土に腐蝕酸、及びセメン
トを所定の配合で加えて粗粒状に形成した吸着材を充填
して形成されている。このリン吸着材層１７の吸着材も
使用後には吸着材層１４、１６の吸着材と同様に有効活
用が可能である。The phosphorus adsorbent layer 17 is used to remove phosphorus from the water to be treated. The phosphorus adsorbent layer 17 is formed by adding a corrosive acid and cement in a predetermined composition to Kanuma soil and filling the adsorbent in a coarse-grained form. Have been. The adsorbent of the phosphorus adsorbent layer 17 can be effectively used after use, similarly to the adsorbents of the adsorbent layers 14 and 16.
【００２４】汚泥ピット１２には細菌の死骸等が汚泥Ｄ
となって順次蓄積されるので、これを適宜に取り出すこ
とになるが、ある程度の汚泥Ｄが常に蓄積している状態
とするのが、主資化物層１３の嫌気性維持にとってプラ
スとなるので好ましい。In the sludge pit 12, dead bacteria or the like contains sludge D.
The sludge D is taken out as appropriate because it is accumulated sequentially. However, it is preferable to keep a certain amount of sludge D constantly, since this is a plus for maintaining the anaerobic property of the main material layer 13. .
【００２５】[0025]
【発明の効果】本発明による水処理方法は、以上説明し
たように、併存する３種類の処理を同時進行的に利用可
能としており、処理効率を従来の方法に較べ大きく向上
させることができる。従って、本方法によると、必要な
設備をより簡易化することができ、またランニングコス
トの低減も図れ、効率的な脱窒処理をより経済的に行な
えるようになる。According to the water treatment method of the present invention, as described above, three types of coexisting treatments can be used simultaneously and the treatment efficiency can be greatly improved as compared with the conventional method. Therefore, according to this method, necessary equipment can be further simplified, running costs can be reduced, and efficient denitrification can be performed more economically.
【図１】本発明の実施に用いる窒素リン除去槽の一例を
示す構成図。FIG. 1 is a configuration diagram showing an example of a nitrogen phosphorus removal tank used for carrying out the present invention.
【図２】本発明の実施に用いる水処理装置の一例を示す
構成図。FIG. 2 is a configuration diagram showing an example of a water treatment apparatus used for carrying out the present invention.
７ 窒素リン除去槽 １３ 主資化物層 １４ 第１吸着材層 １５ 補助資化物層 １６ 第２吸着材層 １７ リン吸着材層 7 nitrogen phosphorus removal tank 13 main material layer 14 first adsorbent layer 15 auxiliary material layer 16 second adsorbent layer 17 phosphorus adsorbent layer
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｃ０２Ｆ 3/10 Ｃ０２Ｆ 3/10 Ａ 3/28 3/28 Ｂ (56)参考文献 特開 昭62−11598（ＪＰ，Ａ) 特開 昭56−126492（ＪＰ，Ａ) 特開 昭54−39954（ＪＰ，Ａ) 特開 昭53−85947（ＪＰ，Ａ) 特開 昭51−141774（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C02F 3/34 101 C02F 3/28 ──────────────────────────────────────────────────続 き Continuation of front page (51) Int.Cl. 7 Identification symbol FI C02F 3/10 C02F 3/10 A 3/28 3/28 B (56) References JP-A-62-11598 (JP, A) JP-A-56-126492 (JP, A) JP-A-54-39954 (JP, A) JP-A-53-85947 (JP, A) JP-A-51-141774 (JP, A) (58) (Int.Cl. 7 , DB name) C02F 3/34 101 C02F 3/28
Claims (4)
ると共に、アンモニア態窒素の吸着が可能な吸着材を充
填した吸着材層を資化物層に連続状態で設け、そして資
化物層から吸着材層に向けて移動させるように処理対象
水を供給してなる水処理方法。Claims: 1. An assimilant layer filled with bacterial assimilates is provided, and an adsorbent layer filled with an adsorbent capable of adsorbing ammonia nitrogen is provided in continuous with the assimilable material layer. A water treatment method in which water to be treated is supplied so as to move toward the adsorbent layer.
る請求項１に記載の水処理方法。2. The water treatment method according to claim 1, wherein a dead plant is used as a bacterial assimilation material.
は請求項２の何れかに記載の水処理方法。3. The water treatment method according to claim 1, wherein a mineral substance is used as the adsorbent.
着材を充填したリン吸着材層を設ける請求項１又は請求
項２の何れかに記載の水処理方法。4. The water treatment method according to claim 1, wherein a phosphorus adsorbent layer filled with an adsorbent capable of adsorbing phosphorus is provided downstream of the adsorbent layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29653392A JP3295147B2 (en) | 1992-10-09 | 1992-10-09 | Water treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29653392A JP3295147B2 (en) | 1992-10-09 | 1992-10-09 | Water treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06122000A JPH06122000A (en) | 1994-05-06 |
| JP3295147B2 true JP3295147B2 (en) | 2002-06-24 |
Family
ID=17834765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29653392A Expired - Lifetime JP3295147B2 (en) | 1992-10-09 | 1992-10-09 | Water treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3295147B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69425361T2 (en) * | 1993-06-16 | 2000-12-28 | Toyo Denka Kogyo Co. Ltd., Kochi | METHOD AND DEVICE FOR TREATING WATER |
| JP2002001372A (en) * | 2000-06-28 | 2002-01-08 | Pekku:Kk | Sewage cleaning apparatus |
| JP2004237170A (en) * | 2003-02-04 | 2004-08-26 | Nippon Steel Chem Co Ltd | Method and apparatus for treating nitrate nitrogen and phosphorus-containing water |
| CN2793054Y (en) * | 2005-05-09 | 2006-07-05 | 黄实雄 | Device for eliminating ammonia and nitrogen hazardous material in water from air water maker |
| JP2007260549A (en) * | 2006-03-28 | 2007-10-11 | Dowa Holdings Co Ltd | Water cleaning method and apparatus |
| JP5023379B2 (en) * | 2006-09-29 | 2012-09-12 | Ｄｏｗａメタルテック株式会社 | Purification method and equipment for treated water |
| CN103112997B (en) * | 2013-02-08 | 2015-04-08 | 农业部沼气科学研究所 | High-ammonia nitrogen organic sewage purification treatment system and method |
-
1992
- 1992-10-09 JP JP29653392A patent/JP3295147B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06122000A (en) | 1994-05-06 |
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