JPH0232954B2 - - Google Patents
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- Publication number
- JPH0232954B2 JPH0232954B2 JP60087171A JP8717185A JPH0232954B2 JP H0232954 B2 JPH0232954 B2 JP H0232954B2 JP 60087171 A JP60087171 A JP 60087171A JP 8717185 A JP8717185 A JP 8717185A JP H0232954 B2 JPH0232954 B2 JP H0232954B2
- Authority
- JP
- Japan
- Prior art keywords
- wastewater
- aeration tank
- contact
- phosphorus
- tank
- 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
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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
- Biological Treatment Of Waste Water (AREA)
- Removal Of Specific Substances (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、廃水、特に有機性廃水に含まれてい
るリン分を除去する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for removing phosphorus contained in wastewater, particularly organic wastewater.
従来、有機性廃水中のリン分を凝集剤（脱リン
剤）により除去する方法としては、(1)廃水を生物
学的に処理した後、これを３次処理したリン分を
除去する方法、(2)浮遊式の活性汚泥法によつて廃
水処理を行なつている曝気槽に脱リン剤を添加し
てリン分を除去する方法がある。
Conventionally, methods for removing phosphorus from organic wastewater using a flocculant (dephosphorizing agent) include (1) biologically treating wastewater and then tertiary treatment to remove phosphorus; (2) There is a method of removing phosphorus by adding a dephosphorizing agent to the aeration tank in which wastewater is treated using the floating activated sludge method.
このような従来の含リン廃水の処理方法にあつ
ては、次のような問題があつた。
Such conventional methods for treating phosphorus-containing wastewater have had the following problems.
まず、前者の３次処理による方法にあつては、
３次処理装置として脱リン剤（凝集剤）を添加し
てリン分を凝集せしめる凝集槽や、この凝集した
リン分を沈澱せしめる沈澱槽、およびPH調整装置
などを設置する必要があるので、廃水処理施設が
大型化し、イニシヤルコストが増大する。 First, regarding the former method using tertiary processing,
As a tertiary treatment device, it is necessary to install a flocculation tank that adds a dephosphorizing agent (flocculant) to flocculate the phosphorus, a sedimentation tank that precipitates the flocculated phosphorus, and a PH adjustment device. Treatment facilities will become larger and initial costs will increase.
また、脱リン剤で凝集沈澱分離されたリン分
は、単独では、脱水性が悪く濃縮し難い汚泥とな
るため、汚泥の処理、処分に費用が増大し、廃水
の処理コストが高騰する。 In addition, the phosphorus that has been coagulated and precipitated with a dephosphorizing agent becomes sludge that has poor dewatering properties and is difficult to thicken when used alone, which increases the cost of sludge treatment and disposal and increases the wastewater treatment cost.
また、後者の曝気槽に脱リン剤を添加する方法
にあつては、前者の方法のような問題は少ないも
のの、慎重な廃水のPHコントロール及び活性汚泥
の性状等の管理が必要になり、廃水処理に高度な
熟練を必要とする。 In addition, although the latter method of adding a dephosphorizing agent to the aeration tank does not have as many problems as the former method, it requires careful wastewater PH control and management of activated sludge properties, etc. Requires high level of skill to process.
すなわち、廃水のPHは、脱リン剤の添加及およ
び活性汚泥中の硝化菌の硝酸化作用等により、低
下する傾向にある。ところが、廃水のPHが下がる
と、活性汚泥や脱リンのための凝集機能が低下
し、処理水質の悪化を招く。このため、後者の処
理方法にあつては、曝気槽にNaOH等の中和剤
を添加して被処理廃水のPHの中性域（PH6.5〜PH
7.8）に保持しなければならない。 That is, the pH of wastewater tends to decrease due to the addition of a dephosphorizing agent and the nitrifying action of nitrifying bacteria in activated sludge. However, when the pH of wastewater decreases, the coagulation function for activated sludge and dephosphorization decreases, leading to a deterioration in the quality of treated water. Therefore, in the latter treatment method, a neutralizing agent such as NaOH is added to the aeration tank so that the pH of the wastewater to be treated is in the neutral range (PH6.5 to PH6.5).
7.8).
また、活性汚泥法は、バルキングなど活性汚泥
の性状が悪化する状態になることがあるが、汚泥
性状の悪化により汚泥の沈降分離性が低下する
と、脱リン効率が低下して、処理水質の悪化を招
く。このため、安定したリン分除去を行なうに
は、活性汚泥の性状の維持にも注意を要す。 In addition, the activated sludge method can lead to deterioration of activated sludge properties such as bulking, but if the sedimentation and separation properties of sludge decrease due to deterioration of sludge properties, dephosphorization efficiency decreases and the quality of treated water deteriorates. invite. Therefore, in order to perform stable phosphorus removal, care must be taken to maintain the properties of activated sludge.
また、この処理方法にあつては、汚泥性状の悪
化や上記廃水のPH低下により、脱リン効率が低下
しリン分の除去が不十分になるので、所期のリン
分除去を行なうために脱リン剤の添加量が多目に
なる傾向がある。ところが、脱リン剤にはAl、
Feなど微生物の活性を低下させる金属が含まれ
ているため、脱リン剤を多く用いると、微生物活
性の低下を招き、処理水質が悪化し易い。 In addition, with this treatment method, dephosphorization efficiency decreases due to deterioration of sludge properties and a decrease in the pH of the wastewater, and phosphorus removal becomes insufficient. There is a tendency for the amount of phosphorus agent added to be large. However, dephosphorization agents contain Al,
Since it contains metals such as Fe that reduce the activity of microorganisms, using a large amount of dephosphorizing agent will lead to a decrease in microbial activity and the quality of the treated water will likely deteriorate.
このように、この処理方法にあつては、廃水の
PHや、活性汚泥の性状、脱リン剤の添加量など
数々の因子を考慮に入れて廃水を処理しなければ
ならず、廃水処理施設の維持管理に高度の熟練を
要する。 In this way, in this treatment method, wastewater
Wastewater must be treated by taking into consideration a number of factors such as pH, properties of activated sludge, and amount of dephosphorization agent added, and a high level of skill is required to maintain and manage wastewater treatment facilities.
また、この処理方法では、高価な中和剤を用い
るうえ、脱リン剤の使用量も多いので、ランニン
グコストが高騰する。 In addition, this treatment method uses an expensive neutralizing agent and also uses a large amount of dephosphorizing agent, which increases running costs.
そこで、本発明にあつては、炭酸カルシウムが
共存せしめられた接触式曝気槽に脱リン剤を添加
して廃水中のリン分を除去することによつて、上
記問題点の解決を図つた。
Therefore, in the present invention, the above-mentioned problem was solved by adding a dephosphorizing agent to a contact type aeration tank in which calcium carbonate was allowed to coexist to remove phosphorus from wastewater.
本発明の含リン廃水の処理方法あつては、曝気
槽内の炭酸カルシウムの緩衝作用により、廃水の
PHが自動的にかつ常に中性域に維持されるので、
曝気槽内において活性汚泥および脱リン剤の機能
を十分発揮せしめることができる。
In the method for treating phosphorus-containing wastewater of the present invention, the buffering effect of calcium carbonate in the aeration tank allows
Since the pH is automatically and always maintained in the neutral range,
The functions of activated sludge and dephosphorizing agent can be fully demonstrated in the aeration tank.
以下、実施例に沿つて本発明の含リン廃水の処
理方法を詳しく説明する。
Hereinafter, the method for treating phosphorus-containing wastewater of the present invention will be explained in detail with reference to Examples.
第１図は、本発明の処理方法を実施するのに好
適な廃水処理施設の一例を示すものである。 FIG. 1 shows an example of a wastewater treatment facility suitable for carrying out the treatment method of the present invention.
まず、第１図の廃水処理施設は、廃水を接触式
曝気法により処理する接触式曝気槽１が一槽設け
られてなるものである。この接触式曝気槽１には
沈澱槽２が連設されている。この接触式曝気槽１
の中央部にはドラフトチユーブ３が立設されてお
り、その上部には表面曝気装置４が設けられてい
る。また接触式曝気槽１内には、接触材５…が充
填されている。この接触材５…の表面には、廃水
を処理する微生物群が固定されている。 First, the wastewater treatment facility shown in FIG. 1 is provided with a contact aeration tank 1 for treating wastewater by a contact aeration method. A settling tank 2 is connected to the contact type aeration tank 1 . This contact type aeration tank 1
A draft tube 3 is erected in the center, and a surface aeration device 4 is provided above the draft tube 3. Further, the contact type aeration tank 1 is filled with a contact material 5 . A group of microorganisms for treating wastewater is fixed on the surface of the contact material 5.
この実施例にあつては、接触式曝気槽１に炭酸
カルシウム（CaCO2）を含む材料から接触材５
…を充填することにより、接触式曝気槽１に
CaCO3が共存せしめられている。CaCO3を含む
材料としては、廃水と接触し得る状態でCaCO3
が含有されているものが用いられる。その例とし
ては、貝穀、かき穀、サンゴおよび貝化石、
CaCO3が分散あるいは担持せしめられた合成樹
脂など種々のものが挙げられる。 In this embodiment, the contact material 5 is made of a material containing calcium carbonate (CaCO 2 ) in the contact type aeration tank 1.
By filling contact type aeration tank 1 with...
CaCO 3 is allowed to coexist. Materials containing CaCO 3 include CaCO 3 in a state that can come into contact with wastewater.
The one containing the following is used. Examples include shellfish, shellfish, coral and shellfish fossils,
Various materials can be mentioned, such as synthetic resins in which CaCO 3 is dispersed or supported.
このような材料からなる接触材５…が充填され
た接触式曝気槽１の上方には、脱リン剤が貯蔵さ
れたタンク６が設けられている。このタンク６か
らポンプ６ａによつて、接触式曝気槽１には脱リ
ン剤が適宜添加される。脱リン剤としては、種々
のものを用いうるが、特にポリ塩化アルミニウム
（PAC）や硫酸バン土など、アルミニウム（Al）
塩や塩化第２鉄などの鉄（Fe）塩からなる凝集
剤が好適に用いられる。 A tank 6 in which a dephosphorizing agent is stored is provided above the contact type aeration tank 1 filled with contact materials 5 made of such materials. A dephosphorizing agent is appropriately added to the contact type aeration tank 1 from this tank 6 by the pump 6a. Various dephosphorizing agents can be used, but in particular aluminum (Al) such as polyaluminum chloride (PAC) and aluminum sulfate
A flocculant consisting of a salt or an iron (Fe) salt such as ferric chloride is preferably used.
この廃水処理施設によつて廃水を処理するに
は、まず、接触式曝気槽１に廃水を流入せしめ
る。この接触式曝気槽１内の廃水は、表面曝気装
置４によつて槽内を循環せしめられる。そして、
接触材５…上の微生物群によつて、廃水中の有機
性物質は除去され、廃水中の窒素化合物は硝酸化
される。この硝酸化により接触式曝気槽１内の廃
水のPHが低下すると、接触材５…に含まれている
CaCO3が溶出して廃水を中和する（緩衝作用）。
このCaCO3の緩衝作用によつて、接触式曝気槽
１内の廃水のPHは、PH7.0〜PH7.8の中性域に保持
される。 In order to treat wastewater using this wastewater treatment facility, first, the wastewater is allowed to flow into the contact type aeration tank 1. The wastewater in this contact type aeration tank 1 is circulated within the tank by a surface aeration device 4. and,
Organic substances in the wastewater are removed and nitrogen compounds in the wastewater are nitrified by the microorganisms on the contact material 5. When the pH of the wastewater in the contact aeration tank 1 decreases due to this nitric oxidation, the amount of water contained in the contact material 5...
CaCO3 elutes and neutralizes the wastewater (buffering effect).
Due to the buffering effect of CaCO 3 , the pH of the wastewater in the contact aeration tank 1 is maintained in the neutral range of PH7.0 to PH7.8.
また、この接触式曝気槽１内の廃水にはタンク
６によつて脱リン剤が添加され、廃水に含まれて
いるリン分が凝集せしめられる。脱リン剤が添加
されることによつても廃水のPHは低下するが、脱
リン剤によるPHの低下もCaCO3の溶出によつて
中和される。この結果、接触式曝気槽１内の廃水
は常に中性の状態に維持される。 Further, a dephosphorizing agent is added to the wastewater in the contact type aeration tank 1 by the tank 6, and the phosphorus contained in the wastewater is coagulated. The addition of a dephosphorizing agent also lowers the PH of the wastewater, but the decrease in PH caused by the dephosphorizing agent is also neutralized by the elution of CaCO 3 . As a result, the wastewater in the contact type aeration tank 1 is always maintained in a neutral state.
接触式曝気槽１で処理された廃水は、沈澱槽２
に流入せしめられる。この沈澱槽２では、処理さ
れた廃水中に混入している汚泥、凝集されたリン
分などが沈澱せしめられ、余剰汚泥として余剰汚
泥引き抜き管１０から除去される。そして、上澄
みは処理水として流出せしめられる。 The wastewater treated in the contact type aeration tank 1 is transferred to the settling tank 2.
It is forced to flow into the country. In this sedimentation tank 2, sludge, coagulated phosphorus, etc. mixed in the treated wastewater are settled and removed from the surplus sludge extraction pipe 10 as surplus sludge. The supernatant is then discharged as treated water.
このような含リン廃水の処理方法にあつては、
CaCO3が共存せしめられた接触式曝気槽１に脱
リン剤を添加して廃水中のリン分を除去すること
としたので、特別の操作を行わなくともCaCO3
の作用によつて、廃水のPHは微生物活性および脱
リン効果が高い中性域に自動的に維持され、廃水
中の有機性物質、リン分などが良好に除去され
る。 Regarding the treatment method of such phosphorus-containing wastewater,
Since we decided to remove phosphorus from wastewater by adding a dephosphorizing agent to the contact aeration tank 1 in which CaCO 3 coexists, CaCO 3 can be removed without any special operation.
By this action, the pH of wastewater is automatically maintained in the neutral range where microbial activity and dephosphorization effects are high, and organic substances and phosphorus content in wastewater are effectively removed.
また、リン分の除去が効率良く行なわれるの
で、脱リン剤の添加を最少量とすることができ
る。このため、(1)沈澱し難い余剰汚泥の発生量を
減少せしめることができ、汚泥の処理、処分コス
トを低減できる。(2)脱リン剤の使用量が減るの
で、薬品代が節減される。(3)Al、Feなどの金属
の廃水中の濃度を減らすことができ、これにより
これら金属が曝気槽内の微生物に蓄積されること
による薬害を減らすことができる。 Furthermore, since the phosphorus content is efficiently removed, the amount of dephosphorization agent added can be kept to a minimum. Therefore, (1) the amount of surplus sludge that is difficult to settle can be reduced, and the cost of sludge treatment and disposal can be reduced. (2) Since the amount of dephosphorization agent used is reduced, chemical costs are reduced. (3) It is possible to reduce the concentration of metals such as Al and Fe in wastewater, thereby reducing phytotoxicity caused by accumulation of these metals in microorganisms in the aeration tank.
さらに、接触式曝気槽１の廃水のPHがCaCO3
の作用により自動的に維持されるので、PH計、コ
ントローラなどのPH調整装置などが不必要にな
り、廃水処理施設の設備費を低減せしめることが
できる。また、NaOH等の高価な中和剤も不要
になるので、廃水処理コストが安価となる。 Furthermore, the pH of the wastewater from contact aeration tank 1 is CaCO 3
Since it is automatically maintained by the action of , there is no need for PH adjustment devices such as PH meters and controllers, and the equipment cost of wastewater treatment facilities can be reduced. Furthermore, since expensive neutralizing agents such as NaOH are not required, wastewater treatment costs are reduced.
また、接触式曝気法は元来、汚泥性状の維持が
容易で、性状の悪化が少ないので、本発明の処理
方法によれば汚泥性状悪化により脱リン効果が低
下するといつた事故の恐れが少なく、安定したリ
ン分除去を行うことができる。 In addition, since the contact aeration method is inherently easy to maintain sludge properties and causes less deterioration of the properties, the treatment method of the present invention reduces the risk of accidents where the dephosphorization effect decreases due to deterioration of sludge properties. , it is possible to perform stable phosphorus removal.
また、この実施例の処理方法にあつては、
CaCO3を含む材料からなる接触材５…を接触式
曝気槽１に充填することによつて、接触式曝気槽
１にCaCO3を共存せしめたので、CaCO3が接触
式曝気槽１内に均一に分散された状態になる。こ
の結果、接触式曝気槽１内の廃水は全体に均一に
中和されることとなり、接触式曝気槽１内のいず
れの部分においても良好な廃水処理がおこなわれ
る。また、CaCO3を接触式曝気槽１に収容する
ため特別のスペースを設ける必要がないので、接
触式曝気槽１の内部スペースを無駄にすることが
なく、接触式曝気槽１の小型化を図ることができ
る。また、CaCO3を含有する接触材５…には硝
化菌等が付着しやすいので、この方法によれば廃
水中の窒素分の硝酸化をも良好に行ない得る。 In addition, regarding the processing method of this example,
By filling the contact material 5 made of a material containing CaCO 3 into the contact aeration tank 1, CaCO 3 was allowed to coexist in the contact aeration tank 1, so that CaCO 3 was uniformly distributed in the contact aeration tank 1. become dispersed. As a result, the wastewater in the contact type aeration tank 1 is uniformly neutralized throughout, and good wastewater treatment is performed in any part of the contact type aeration tank 1. Furthermore, since there is no need to provide a special space to accommodate CaCO 3 in the contact type aeration tank 1, the internal space of the contact type aeration tank 1 is not wasted, and the size of the contact type aeration tank 1 can be reduced. be able to. Furthermore, since nitrifying bacteria and the like are likely to adhere to the contact material 5 containing CaCO 3 , this method can also effectively nitrate nitrogen in wastewater.
次に、本発明の廃水処理方法の経済的効果を従
来の方法と比較して示す。（なお、比較する従来
法は、廃水を接触式曝気法で処理したあと３次処
理として凝集沈澱法でリン分を除去する廃水処理
方法とした。また、処理する廃水の流入量は300
〜600m3／日とした。 Next, the economic effects of the wastewater treatment method of the present invention will be shown in comparison with conventional methods. (In addition, the conventional method for comparison is a wastewater treatment method in which wastewater is treated by a contact aeration method and then phosphorus is removed by a coagulation-sedimentation method as a tertiary treatment.In addition, the inflow amount of wastewater to be treated is 300%
~600m 3 /day.
(i) 建設費
従来法……100 本発明法……80
(ii) 処理施設の敷地面積
従来法……100 本発明法……85
(iii) 薬品代（中和剤、脱リン剤）
従来法……100 本発明法……85
(iv) 余剰汚泥処分費用
従来法……100 本発明法……75
（上記の数値は、従来法ベースの指数を示し、小
さい程良い。）
〔他の実施例〕
第２図は、本発明の含リン廃水の処理方法を行
なうのに好適な廃水処理施設の第二の例を示すも
のである。この廃水処理施設は、複数の接触式曝
気槽１…が連設されてなるものである。各接触式
曝気槽１…には、ブロワー７からなる散気装置８
により空気が送り込まれ、これにより曝気槽１…
の廃水はエアレーシヨンされている。これら接触
式曝気槽１…の全部あるいは一部には、CaCO3
を含有する材料からなる接触材５…が充填されて
いる。そして、CaCO3が共存せしめられている
接触式曝気槽１…には、タンク６からバルブ９…
を介して脱リン剤が供給される。脱リン剤を供給
する槽１…は、第一の槽１であつても、第二以降
の槽１であつてもよい。また、一槽のみでなく複
数の槽に脱リン剤を添加してもよい。(i) Construction cost Conventional method...100 Inventive method...80 (ii) Site area of treatment facility Conventional method...100 Inventive method...85 (iii) Chemical costs (neutralizing agent, dephosphorizing agent) Conventional Method...100 Method of the present invention...85 (iv) Surplus sludge disposal cost Conventional method...100 Method of the present invention...75 (The above values indicate the index based on the conventional method, and the smaller the better.) Embodiment] FIG. 2 shows a second example of a wastewater treatment facility suitable for carrying out the method for treating phosphorus-containing wastewater of the present invention. This wastewater treatment facility is made up of a plurality of contact type aeration tanks 1 installed in series. Each contact type aeration tank 1... has an aeration device 8 consisting of a blower 7.
Air is sent into the aeration tank 1...
The wastewater is aerated. All or part of these contact type aeration tanks 1... contain CaCO 3
A contact material 5 made of a material containing... is filled. The contact type aeration tank 1 in which CaCO 3 coexists is connected to a valve 9 from the tank 6.
The dephosphorizing agent is supplied through the The tank 1 for supplying the dephosphorizing agent may be the first tank 1 or the second or subsequent tanks 1. Further, the dephosphorizing agent may be added not only to one tank but also to a plurality of tanks.
このような廃水処理方法にあつても上記実施例
の処理方法と同様の作用効果が得られる。 Even with such a wastewater treatment method, the same effects as those of the treatment method of the above embodiment can be obtained.
以上説明したように、本発明の含リン廃水の処
理方法によれば、接触式曝気槽内の廃水中に脱リ
ン剤を添加することにより該接触式曝気槽内で廃
水中の有機物処理と脱リン剤とを行なうにあた
り、予め、該接触式曝気槽内に、炭酸カルシウム
を含む材料を接触材として充填しておくようにし
たので、処理中の廃水のPHが炭酸カルシウムの作
用によつて自動的に中性域に維持される。そし
て、このようにして排水のPHを中性域に保つこと
によつて、廃水中の汚泥やリン分の凝集作用が低
下することがなくなる上、廃水のPH低下に伴う脱
リン効率の低下を防ぐために脱リン剤の添加量を
増やす必要もなくなるため、過剰の脱リン剤添加
による微生物活性の低下、およびそれによつて起
こる処理水質の悪化を防ぐことができる。また、
脱リン剤の使用量を減らし薬害を防止得ると共
に、接触式曝気法によるので、汚泥性状の維持も
容易に行なわれる。従つて、本発明の処理方法に
よれば、廃水処理施設の維持管理が大幅に容易に
なると共に、廃水処理の安定化と処理水質の向上
を実現できる。
As explained above, according to the method for treating phosphorus-containing wastewater of the present invention, by adding a dephosphorizing agent to the wastewater in the contact aeration tank, the organic matter in the wastewater can be treated and removed in the contact aeration tank. Before adding phosphorous agent, we filled the contact type aeration tank with a material containing calcium carbonate as a contact material, so that the pH of the wastewater being treated automatically changes due to the action of calcium carbonate. is maintained in the neutral range. By keeping the pH of the wastewater in the neutral range in this way, the flocculation effect of sludge and phosphorus in the wastewater will not decrease, and the dephosphorization efficiency will not decrease due to the decrease in the pH of the wastewater. Since there is no need to increase the amount of dephosphorizing agent added in order to prevent this, it is possible to prevent a decrease in microbial activity due to excessive addition of dephosphorizing agent and a deterioration in the quality of treated water caused by this. Also,
In addition to reducing the amount of dephosphorizing agent used and preventing chemical damage, the contact aeration method makes it easy to maintain sludge properties. Therefore, according to the treatment method of the present invention, maintenance and management of wastewater treatment facilities becomes significantly easier, and it is possible to stabilize wastewater treatment and improve the quality of treated water.
また、この処理方法にあつては、脱リン剤の添
加量を最少化できるので、脱リン剤の使用量を節
減できるうえ、廃水のPHの維持にNaOHなどの
高価な中和剤を用いる必要がない。このため、廃
水処理コストを大幅に低減することができる。ま
た、脱リン剤の使用量が少ないので、余剰汚泥の
発生量が減少し、汚泥の処理、処分コストが低下
する。これによつても、廃水処理コストを低減す
ることができる。 Additionally, with this treatment method, the amount of dephosphorization agent added can be minimized, reducing the amount of dephosphorization agent used and eliminating the need to use expensive neutralizing agents such as NaOH to maintain the pH of the wastewater. There is no. Therefore, wastewater treatment costs can be significantly reduced. Moreover, since the amount of dephosphorization agent used is small, the amount of surplus sludge generated is reduced, and the cost of sludge treatment and disposal is reduced. This also makes it possible to reduce wastewater treatment costs.
さらに、この廃水処理方法によれば、廃水のPH
は、炭酸カルシウムの作用により自ずと中性域に
維持されるので、PH計やコントローラ等のPH調整
装置が不要になるとともに、接触式曝気槽にて脱
リン剤を同時に行なうので、リン分の除去のため
に凝集槽や攪拌装置を設ける必要がなく、処理施
設のコンパクト化、簡素化、そしてイニシヤルコ
ストの低減を図ることができる。 Furthermore, according to this wastewater treatment method, the pH of the wastewater is
is automatically maintained in a neutral range by the action of calcium carbonate, eliminating the need for PH adjustment devices such as PH meters and controllers. At the same time, dephosphorization agents are simultaneously applied in a contact aeration tank, making it easy to remove phosphorus. Therefore, there is no need to provide a flocculation tank or a stirring device, and the treatment facility can be made more compact and simple, and the initial cost can be reduced.
加えて、本発明の廃水処理方法は、接触式曝気
法を行なう廃水処理施設に随時適用でき、廃水処
理の高度化を図ることができる。 In addition, the wastewater treatment method of the present invention can be applied at any time to wastewater treatment facilities that perform a contact aeration method, and can improve the sophistication of wastewater treatment.
第１図および第２図は、それぞれ本発明の含リ
ン廃水の処理方法を実施するのに好適な廃水処理
施設の例を示す概略構成図である。
１…接触式曝気槽、４…表面曝気装置、５…接
触材、６…タンク、７…ブロワー、８…散気装
置。
FIG. 1 and FIG. 2 are schematic configuration diagrams each showing an example of a wastewater treatment facility suitable for carrying out the method for treating phosphorus-containing wastewater of the present invention. 1...Contact aeration tank, 4...Surface aeration device, 5...Contact material, 6...Tank, 7...Blower, 8...Aeration device.
Claims (1)
処理する際に、その接触式曝気槽内の廃水中に脱
リン剤を添加することにより該接触式曝気槽内で
廃水中の有機物処理と脱リンとを行なう含リン廃
水中の処理方法であつて、予め該接触式曝気槽内
に、炭酸カルシウムを含む材料を接触材として充
填しておくことを特徴とする含リン廃水の処理方
法。1. When organic wastewater containing phosphorus is treated in a contact aeration tank, by adding a dephosphorizing agent to the wastewater in the contact aeration tank, the organic matter in the wastewater can be treated in the contact aeration tank. A method for treating phosphorus-containing wastewater that performs dephosphorization and dephosphorization, the method comprising filling the contact aeration tank with a material containing calcium carbonate as a contact material in advance. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60087171A JPS61245892A (en) | 1985-04-23 | 1985-04-23 | Treatment of phosphorus-containing waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60087171A JPS61245892A (en) | 1985-04-23 | 1985-04-23 | Treatment of phosphorus-containing waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61245892A JPS61245892A (en) | 1986-11-01 |
| JPH0232954B2 true JPH0232954B2 (en) | 1990-07-24 |
Family
ID=13907540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60087171A Granted JPS61245892A (en) | 1985-04-23 | 1985-04-23 | Treatment of phosphorus-containing waste water |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61245892A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161525A (en) * | 2011-03-02 | 2011-08-24 | 大连民族学院 | Dephosphorization method for wastewater by hydrolysis acidification |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2653086B2 (en) * | 1988-03-04 | 1997-09-10 | 栗田工業株式会社 | Coagulation biological filtration equipment |
| US5500131A (en) * | 1994-04-05 | 1996-03-19 | Metz; Jean-Paul | Compositions and methods for water treatment |
| JP4683356B2 (en) * | 1999-05-11 | 2011-05-18 | 東京利根開発株式会社 | Muddy water purification device |
| CN1321920C (en) * | 2005-03-08 | 2007-06-20 | 简放陵 | Dephosphorizing technology for waste water treatment of high efficiency, low cost and no pollution |
| CN112062199A (en) * | 2020-09-08 | 2020-12-11 | 中国科学院南京地理与湖泊研究所 | A method for targeted blocking of nutrients at the sediment-water interface |
| CN112047421A (en) * | 2020-09-08 | 2020-12-08 | 中国科学院南京地理与湖泊研究所 | Natural water body phosphorus control method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5231566A (en) * | 1975-09-05 | 1977-03-10 | Jiyouken:Kk | Bubbling system for active mud treatment |
| JPS59206092A (en) * | 1983-05-10 | 1984-11-21 | Hitachi Plant Eng & Constr Co Ltd | Wastewater treatment method |
-
1985
- 1985-04-23 JP JP60087171A patent/JPS61245892A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102161525A (en) * | 2011-03-02 | 2011-08-24 | 大连民族学院 | Dephosphorization method for wastewater by hydrolysis acidification |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61245892A (en) | 1986-11-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |