JPH07251184A - Treatment of water to be treated such as organic waste water and device therefor - Google Patents
Treatment of water to be treated such as organic waste water and device thereforInfo
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- JPH07251184A JPH07251184A JP6041602A JP4160294A JPH07251184A JP H07251184 A JPH07251184 A JP H07251184A JP 6041602 A JP6041602 A JP 6041602A JP 4160294 A JP4160294 A JP 4160294A JP H07251184 A JPH07251184 A JP H07251184A
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、各種工場等から排出さ
れる有機性排水等の被処理水を、生物処理するための処
理方法とその装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment method and apparatus for treating biologically treated water such as organic waste water discharged from various factories.
【０００２】[0002]
【従来の技術】従来、この種の処理装置としては、図４
に示すようなものが用いられている。2. Description of the Related Art Conventionally, as a processing apparatus of this type, FIG.
The one shown in is used.
【０００３】すなわち、従来のこの種の装置は、同図に
示すように被処理水としての原水を貯留する原水貯留槽
1aと、該原水貯留槽1aから供給される被処理水のｐＨを
調整するためのｐＨ調整槽2aと、そのｐＨ調整槽2aによ
ってｐＨが調整された被処理水を生物処理するための生
物処理槽8aと、その生物処理槽8aで処理された被処理水
を供給する沈澱槽9aとからなるものである。That is, a conventional apparatus of this type is, as shown in the figure, a raw water storage tank for storing raw water as treated water.
1a, a pH adjusting tank 2a for adjusting the pH of the water to be treated supplied from the raw water storage tank 1a, and a biological treatment for biologically treating the water to be treated whose pH is adjusted by the pH adjusting tank 2a It comprises a tank 8a and a settling tank 9a for supplying the water to be treated which has been treated in the biological treatment tank 8a.
【０００４】そして、上記ｐＨ調整槽2aにおけるｐＨ調
整剤としては、水酸化ナトリウム（ＮａＯＨ）、塩酸
（ＨＣｌ）、硫酸（Ｈ2ＳＯ4)等の強アルカリや強酸が
用いられていた。As the pH adjusting agent in the pH adjusting tank 2a, a strong alkali such as sodium hydroxide (NaOH), hydrochloric acid (HCl), sulfuric acid (H 2 SO 4 ) or a strong acid has been used.
【０００５】[0005]
【発明が解決しようとする課題】しかし、前記有機性排
水のうち、純水廃液や超純水廃液のように、不純物をほ
とんど含まない場合には、水質の緩衝能力が極めて低い
（すなわち微量の酸やアルカリの添加によってもｐＨ値
が大きく変動する）ため、上記のようなｐＨ調整剤を用
いると排水のｐＨの変動が著しくなり、このようなｐＨ
変動は生物に悪影響が生じる上、ｐＨ値が極端に高くな
りすぎた場合にも、生物に対して悪影響が生じていた。However, when the organic wastewater contains almost no impurities like the pure water waste solution and the ultrapure water waste solution, the water quality has a very low buffering capacity (that is, a very small amount). Since the pH value varies greatly even when an acid or an alkali is added), the pH of the wastewater changes significantly when the above pH adjuster is used.
The fluctuation has a bad effect on the living thing, and also has a bad effect on the living thing even when the pH value becomes extremely high.
【０００６】しかも、上記理由から、このような排水に
対してはごく微量の酸やアルカリしか添加できないため
に、生物処理の段階で発生する酸成分やアルカリ成分を
中和、すなわち生物処理に好適なｐＨを維持するのに十
分な量の酸やアルカリを添加できないという問題点があ
ったのである。Moreover, for the above reasons, only a very small amount of acid or alkali can be added to such waste water, so that the acid component or alkali component generated at the stage of biological treatment is neutralized, that is, suitable for biological treatment. The problem is that it is not possible to add a sufficient amount of acid or alkali to maintain a proper pH.
【０００７】本発明は、上記のような問題点を解決する
ためになされたもので、特に純水排水や、超純水排水の
ような緩衝能力が極めて低い排水処理を行うに際して
の、生物処理のｐＨ調整を容易にすることを課題とする
ものである。The present invention has been made in order to solve the above-mentioned problems, and in particular, biological treatment for treating wastewater having extremely low buffering capacity, such as pure water wastewater and ultrapure water wastewater. It is an object of the present invention to facilitate the pH adjustment.
【０００８】[0008]
【課題を解決するための手段】本発明は、このような課
題を解決するために、有機性排水等の被処理水の処理方
法とその装置としてなされたもので、有機性排水等の被
処理水の処理方法としての特徴は、有機性排水等の被処
理水のｐＨを、第１ｐＨ調整槽２で強アルカリ又は強酸
を添加して調整した後、第２ｐＨ調整槽６で弱アルカリ
性液又は弱酸性液を添加して調整し、その後、生物処理
槽８内で生物処理を行って前記被処理水を処理すること
にある。The present invention has been made as a method and apparatus for treating water to be treated such as organic wastewater in order to solve such a problem. A feature of the method for treating water is that the pH of water to be treated such as organic waste water is adjusted by adding a strong alkali or a strong acid in the first pH adjusting tank 2 and then adjusting the pH of the weak alkaline liquid or weak in the second pH adjusting tank 6. This is to add and adjust an acidic liquid and then perform biological treatment in the biological treatment tank 8 to treat the water to be treated.
【０００９】また、有機性排水等の被処理水の処理装置
としての特徴は、有機性排水等の被処理水に強アルカリ
又は強酸を添加して前記被処理水のｐＨを調整する第１
ｐＨ調整槽２と、前記被処理水に弱アルカリ性液又は弱
酸性液を添加して該被処理水のｐＨを調整する第２ｐＨ
調整槽６と、前記第１ｐＨ調整槽２及び第２ｐＨ調整槽
６でｐＨが調整された被処理水の生物処理を行う生物処
理槽８とを具備したことにある。Further, the feature of the apparatus for treating treated water such as organic wastewater is that the pH of the treated water is adjusted by adding a strong alkali or a strong acid to the treated water such as organic wastewater.
pH adjusting tank 2 and a second pH for adjusting the pH of the water to be treated by adding a weak alkaline liquid or a weak acid liquid to the water to be treated
It is provided with an adjusting tank 6 and a biological treatment tank 8 for biologically treating the water to be treated whose pH is adjusted by the first pH adjusting tank 2 and the second pH adjusting tank 6.
【００１０】尚、弱アルカリ性液又は弱酸性液として
は、たとえば炭酸水素ナトリウム、炭酸ナトリウム、炭
酸カリウム、炭酸水素カリウム、酢酸ナトリウム、又は
硫酸アンモニウム、硝酸アンモニウム、塩化アンモニウ
ム等がある。Examples of the weak alkaline liquid or weak acidic liquid include sodium hydrogen carbonate, sodium carbonate, potassium carbonate, potassium hydrogen carbonate, sodium acetate, ammonium sulfate, ammonium nitrate and ammonium chloride.
【００１１】[0011]
【作用】そして、上記のように第１ｐＨ調整槽２で強ア
ルカリ又は強酸が添加されることにより、原水としての
被処理水のｐＨの変動が一定値に保たれ、また第２ｐＨ
調整槽６で弱アルカリ性液又は弱酸性液が添加されるこ
とにより、後段の生物処理槽８で発生する酸成分、アル
カリ成分が中和されて、生物処理を行うのに適当なｐＨ
値を維持することが可能となるのである。By adding a strong alkali or strong acid in the first pH adjusting tank 2 as described above, the fluctuation of the pH of the water to be treated as raw water is maintained at a constant value, and the second pH is adjusted.
By adding the weak alkaline liquid or the weak acidic liquid in the adjusting tank 6, the acid component and the alkaline component generated in the biological treatment tank 8 in the subsequent stage are neutralized, and the pH suitable for biological treatment is obtained.
It is possible to maintain the value.
【００１２】[0012]
【実施例】以下、本発明の実施例について説明する。実施例１ 本実施例は、純水排水、或いは超純水排水の処理方法の
一実施例であり、先ずその処理方法を実施するための処
理装置の構成について説明する。EXAMPLES Examples of the present invention will be described below. Example 1 This example is an example of a method for treating pure water drainage or ultrapure water drainage. First, the configuration of a processing apparatus for carrying out the treatment method will be described.
【００１３】図１において、１は被処理水としての原水
を貯留するための原水貯留槽、２は該原水貯留槽１から
供給される原水のｐＨを調整するための第１ｐＨ調整槽
で、該第１ｐＨ調整槽２には、強アルカリ又は強酸を前
記第１ｐＨ調整槽２内に供給する供給ポンプ３と、該供
給ポンプ３によるアルカリ又は酸の供給量を制御してｐ
Ｈを調整するｐＨコントローラー４と、前記第１ｐＨ調
整槽２内の被処理水を攪拌する攪拌機５とが具備されて
いる。In FIG. 1, 1 is a raw water storage tank for storing raw water as water to be treated, and 2 is a first pH adjusting tank for adjusting the pH of the raw water supplied from the raw water storage tank 1. In the first pH adjusting tank 2, a supply pump 3 for supplying a strong alkali or a strong acid into the first pH adjusting tank 2 and a supply amount of the alkali or acid by the supply pump 3 are controlled to control the p.
A pH controller 4 for adjusting H and a stirrer 5 for stirring the water to be treated in the first pH adjusting tank 2 are provided.
【００１４】６は、前記第１ｐＨ調整槽２でｐＨを調整
した後の被処理水に弱アルカリ性液又は弱酸性液を添加
してｐＨを調整するための第２ｐＨ調整槽で、該第２ｐ
Ｈ調整槽６内には、弱アルカリ性液又は弱酸性液を添加
した後に前記第２ｐＨ調整槽６内の被処理水を攪拌する
攪拌機７が具備されている。Reference numeral 6 is a second pH adjusting tank for adjusting the pH by adding a weak alkaline liquid or a weak acidic liquid to the water to be treated after adjusting the pH in the first pH adjusting tank 2.
The H adjusting tank 6 is provided with a stirrer 7 for stirring the water to be treated in the second pH adjusting tank 6 after adding the weak alkaline liquid or the weak acidic liquid.
【００１５】８は、前記第１ｐＨ調整槽２及び第２ｐＨ
調整槽６でｐＨが調整された被処理水を生物処理するた
めの固定床式の生物処理槽で、この生物処理槽８の下部
には空気を流入させるためのパイプ（図示せず）が接続
され、且つ該パイプに連通して散気装置が配設されてい
る。Reference numeral 8 denotes the first pH adjusting tank 2 and the second pH.
A fixed-bed type biological treatment tank for biologically treating the water to be treated whose pH has been adjusted in the adjusting tank 6, and a pipe (not shown) for connecting air is connected to the lower portion of the biological treatment tank 8. An air diffuser is provided in communication with the pipe.
【００１６】そして、上記のような処理装置を用いて、
有機性排水を処理する方法について説明する。Then, using the processing apparatus as described above,
A method for treating organic wastewater will be described.
【００１７】先ず、原水貯留槽１に貯留された被処理水
としての原水（工場からの排水）を第１ｐＨ調整槽２に
供給する。このとき、種々のｐＨ値の原水が連続的に供
給され、そのｐＨ値の変動幅は６〜10である。この原水
は200L/dで第１ｐＨ調整槽２に供給される。First, raw water (wastewater from a factory) as water to be treated stored in the raw water storage tank 1 is supplied to the first pH adjusting tank 2. At this time, raw water having various pH values is continuously supplied, and the fluctuation range of the pH value is 6 to 10. This raw water is supplied to the first pH adjusting tank 2 at 200 L / d.
【００１８】その第１ｐＨ調整槽２に供給された被処理
水は、供給ポンプ３からの強アルカリ〔本実施例では水
酸化ナトリウム（ＮａＯＨ）〕の供給によりｐＨコント
ローラー４でその供給量が制御されつつ、ｐＨが11.1に
調整される。The amount of the treated water supplied to the first pH adjusting tank 2 is controlled by the pH controller 4 by the supply of a strong alkali [sodium hydroxide (NaOH) in this embodiment] from the supply pump 3. Meanwhile, the pH is adjusted to 11.1.
【００１９】しかし、このままで生物処理槽８に被処理
水を投入するとｐＨが高すぎて生物に阻害を与える。し
かも後述の生物処理に必要なアルカリ成分の量を確保す
るためには、さらにアルカリを添加せねばならない。However, if the water to be treated is added to the biological treatment tank 8 as it is, the pH is too high and the organism is inhibited. Moreover, in order to secure the amount of the alkaline component necessary for the biological treatment described later, it is necessary to further add an alkali.
【００２０】そこで、上記のようにｐＨ調整された被処
理水は、第２ｐＨ調整槽６に供給され、その第２ｐＨ調
整槽６内で弱アルカリ性液〔本実施例では炭酸水素ナト
リウム（ＮａＨＣＯ3)〕を十分な一定量供給する。ここ
で、十分な一定量の炭酸水素ナトリウム（ＮａＨＣＯ3)
が第２ｐＨ調整槽６に供給されることにより、後段の生
物処理に適当なｐＨ値である8.8 まで下げることがで
き、また次工程での生物処理におけるｐＨの変動も少な
くなるのである。Therefore, the water to be treated whose pH has been adjusted as described above is supplied to the second pH adjusting tank 6, and in the second pH adjusting tank 6, a weak alkaline liquid [sodium hydrogen carbonate (NaHCO 3 ) is used in this embodiment). ] Is supplied in a sufficient constant amount. Here, a sufficient fixed amount of sodium hydrogen carbonate (NaHCO 3 )
Is supplied to the second pH adjusting tank 6, the pH value can be lowered to 8.8 which is a suitable pH value for the biological treatment in the subsequent stage, and the fluctuation of the pH in the biological treatment in the next step is reduced.
【００２１】すなわち、第２ｐＨ調整槽６内で次の中和
反応が生じる。 ＮａＯＨ＋ＮａＨＣＯ3→Ｎａ2ＣＯ3＋Ｈ2Ｏ そして、第２ｐＨ調整槽６の出口では、ＮａＨＣＯ3と
上記反応の結果生成するＮａ2ＣＯ3の混合液が存在し、
このＮａ2ＣＯ3は溶液中でアルカリ性を呈するため、次
工程の生物処理で発生する酸成分を中和することがで
き、ｐＨの変動を少なくし、生物処理に好適なｐＨを維
持できるのである。That is, the following neutralization reaction occurs in the second pH adjusting tank 6. NaOH + NaHCO 3 → Na 2 CO 3 + H 2 O Then, at the outlet of the second pH adjusting tank 6, there is a mixed solution of NaHCO 3 and Na 2 CO 3 produced as a result of the above reaction,
Since this Na 2 CO 3 exhibits alkalinity in the solution, it is possible to neutralize the acid component generated in the biological treatment in the next step, reduce the fluctuation of pH, and maintain the pH suitable for biological treatment. .
【００２２】次に、上記のようにして緩衝作用を有する
液で調整された排水を、固定床式の生物処理槽８で処理
する。この生物処理槽８内へは、該生物処理槽８の下部
に接続されたパイプ（図示せず）と散気装置を介して空
気が流入される。Next, the waste water prepared with the liquid having the buffer action as described above is treated in the fixed bed type biological treatment tank 8. Air is introduced into the biological treatment tank 8 through a pipe (not shown) connected to the lower portion of the biological treatment tank 8 and an air diffuser.
【００２３】このようにして生物処理槽８で処理した結
果、その処理後の処理水のｐＨは7.5 〜8.0 となった。As a result of the treatment in the biological treatment tank 8 as described above, the pH of the treated water after the treatment was 7.5 to 8.0.
【００２４】実施例２ 本実施例は、純水排水、或いは超純水排水の処理方法の
他の実施例である。 Embodiment 2 This embodiment is another embodiment of the method for treating pure water drainage or ultrapure water drainage.
【００２５】本実施例では、生物処理槽８としては、上
記実施例１のような固定床式生物処理装置の代りに栓流
式の生物処理槽を用いた。In the present embodiment, as the biological treatment tank 8, a plug flow type biological treatment tank was used instead of the fixed bed type biological treatment apparatus as in the above-mentioned Embodiment 1.
【００２６】これを図２により説明すると、本実施例で
は、上記実施例１とは異なり、生物処理槽８で処理した
被処理水を上澄液と汚泥とに分離する沈澱槽９が設けら
れている。This will be described with reference to FIG. 2. In this embodiment, unlike the first embodiment, a settling tank 9 for separating the water to be treated in the biological treatment tank 8 into a supernatant and sludge is provided. ing.
【００２７】すなわち、本実施例では、沈澱槽９で沈澱
分離された汚泥が生物処理槽８に再度供給され、その汚
泥に含有された微生物が再利用されるのである。That is, in this embodiment, the sludge precipitated and separated in the settling tank 9 is supplied to the biological treatment tank 8 again, and the microorganisms contained in the sludge are reused.
【００２８】その他の装置の構成は上記実施例１と同じ
であるため、その詳細な説明は省略する。The configuration of the other devices is the same as that of the first embodiment, and the detailed description thereof will be omitted.
【００２９】本実施例の純水排水、超純水排水の処理方
法においても、先ず、原水貯留槽１に貯留された原水を
第１ｐＨ調整槽２に供給した後、その第１ｐＨ調整槽２
内で強アルカリを添加してｐＨが調整され、次にその被
処理水を第２ｐＨ調整槽６に供給して弱アルカリ性液を
添加し、その後生物処理槽８へ供給して分解，処理を行
う。In the method for treating pure water drainage and ultrapure water drainage according to this embodiment, first, the raw water stored in the raw water storage tank 1 is supplied to the first pH adjusting tank 2 and then the first pH adjusting tank 2 is supplied.
The pH is adjusted by adding a strong alkali in the inside, then the water to be treated is supplied to the second pH adjusting tank 6 to add the weak alkaline liquid, and then supplied to the biological treatment tank 8 for decomposition and treatment. .
【００３０】生物処理槽８での処理後の処理水は、次の
沈澱槽９へ供給され、その沈澱槽９で上澄液と汚泥とに
分離されて上澄液が外部に放流されるとともに、沈澱分
離された微生物は生物処理槽８へ返送するか、又は系外
へ引き抜かれる。The treated water after the treatment in the biological treatment tank 8 is supplied to the next settling tank 9, which is separated into a supernatant and a sludge, and the supernatant is discharged to the outside. The microorganisms separated by precipitation are returned to the biological treatment tank 8 or drawn out of the system.
【００３１】尚、原水の第１ｐＨ調整槽２への供給量、
或いは原水貯留槽１、第１ｐＨ調整槽２、第２ｐＨ調整
槽６、生物処理槽８内でのそれぞれのｐＨ値も上記実施
例１と同様である。The amount of raw water supplied to the first pH adjusting tank 2,
Alternatively, the respective pH values in the raw water storage tank 1, the first pH adjusting tank 2, the second pH adjusting tank 6, and the biological treatment tank 8 are the same as those in the first embodiment.
【００３２】本実施例においても、第２ｐＨ調整槽６で
弱アルカリ性液が添加されるため、第１ｐＨ調整槽２で
加えられたアルカリ成分の量を保てるとともに、生物処
理に適当なｐＨ値まで下げることができ、ｐＨの変動も
少なくなるのである。Also in this embodiment, since the weak alkaline liquid is added in the second pH adjusting tank 6, the amount of the alkaline component added in the first pH adjusting tank 2 can be maintained and the pH value can be lowered to a suitable pH value for biological treatment. Therefore, the fluctuation of pH can be reduced.
【００３３】実施例３ 本実施例は、実施例１における固定床式生物処理装置の
代りに完全混合式の生物処理槽を用いた実施例である。 Example 3 This example is an example in which a complete mixing type biological treatment tank was used in place of the fixed bed type biological treatment apparatus in Example 1.
【００３４】本実施例では、図３に示すように、生物処
理槽８内に、該生物処理槽８内の被処理水を曝気攪拌す
る機械式曝気装置10が設けられている点で実施例１，２
と相違する。In this embodiment, as shown in FIG. 3, the biological treatment tank 8 is provided with a mechanical aerator 10 for aerating and agitating the water to be treated in the biological treatment tank 8. 1,2
Is different from.
【００３５】このような機械式曝気装置10で生物処理槽
８内の被処理水を曝気攪拌すると、その曝気攪拌によっ
て生物処理槽８内での各場所の溶存酸素濃度の変動が少
なくなる。When the water to be treated in the biological treatment tank 8 is aerated and agitated by the mechanical aeration apparatus 10 as described above, the variation in the dissolved oxygen concentration at each location in the biological treatment tank 8 is reduced by the aeration and agitation.
【００３６】その他の装置の構成は上記実施例２と同じ
であるため、その詳細な説明は省略する。Since the construction of the other devices is the same as that of the second embodiment, the detailed description thereof will be omitted.
【００３７】また、処理方法も、上記機械式曝気装置10
による生物処理槽８内での曝気攪拌工程を除けば実施例
２とすべて同じであるため、その詳細な説明は省略す
る。The treatment method is also the same as the mechanical aeration apparatus 10 described above.
Except for the aeration and agitation step in the biological treatment tank 8 according to the above, all steps are the same as those in Example 2, and therefore detailed description thereof is omitted.
【００３８】さらに、原水の第１ｐＨ調整槽２への供給
量、或いは原水貯留槽１、第１ｐＨ調整槽２、第２ｐＨ
調整槽６、生物処理槽８内でのそれぞれのｐＨ値も上記
実施例１，２と同様である。Further, the amount of raw water supplied to the first pH adjusting tank 2, or the raw water storage tank 1, the first pH adjusting tank 2, and the second pH.
The pH values in the adjusting tank 6 and the biological treatment tank 8 are the same as those in Examples 1 and 2 above.
【００３９】その他の実施例 尚、上記実施例では、被処理水としての原水を一旦原水
貯留槽１に貯留した後に、その原水をｐＨ調整槽２に供
給したが、たとえば工場より排出される被処理水を原水
貯留槽１に貯留せずに直接ｐＨ調整槽２に供給すること
も可能である。[0039] Other embodiments In the above embodiment, after storing once the raw water storage tank 1 the raw water as water to be treated, the has been supplied to the raw water in the pH adjustment tank 2, is for example, discharged from the plant It is also possible to directly supply the treated water to the pH adjusting tank 2 without storing it in the raw water storage tank 1.
【００４０】また、上記各実施例では、第１ｐＨ調整槽
２でｐＨを調整する手段として、強アルカリを該第１ｐ
Ｈ調整槽２内に供給する供給ポンプ３と、該供給ポンプ
３による供給量を制御してｐＨを調整するｐＨコントロ
ーラー４との組み合わせによる手段が採用されていた
が、第１ｐＨ調整槽２内のｐＨの調整手段はこれに限定
されるものではない。In each of the above-mentioned embodiments, as a means for adjusting the pH in the first pH adjusting tank 2, a strong alkali is added to the first pH adjusting tank 2.
The means by the combination of the supply pump 3 for supplying into the H adjustment tank 2 and the pH controller 4 for adjusting the pH by controlling the supply amount by the supply pump 3 has been adopted. The pH adjusting means is not limited to this.
【００４１】さらに、該実施例では、第１ｐＨ調整槽２
で添加する強アルカリとして水酸化ナトリウム（ＮａＯ
Ｈ）を使用したが、水酸化カリウム（ＫＯＨ）等の他の
強アルカリを使用することも可能であり、さらには塩酸
（ＨＣｌ）や硫酸（Ｈ2ＳＯ4）等の強酸を使用すること
も可能である。Further, in this embodiment, the first pH adjusting tank 2 is used.
Sodium hydroxide (NaO
H) was used, but it is also possible to use other strong alkalis such as potassium hydroxide (KOH), and it is also possible to use strong acids such as hydrochloric acid (HCl) and sulfuric acid (H 2 SO 4 ). It is possible.
【００４２】さらに、第２ｐＨ調整槽６で添加される弱
アルカリ性液として、上記実施例では、炭酸水素ナトリ
ウム（ＮａＨＣＯ3)を使用したが、弱アルカリ性液の種
類はこれに限定されるものではなく、炭酸水素カリウム
（ＫＨＣＯ3)を用いることも可能である。Further, sodium hydrogen carbonate (NaHCO 3 ) was used as the weak alkaline liquid added in the second pH adjusting tank 6 in the above embodiment, but the kind of the weak alkaline liquid is not limited to this. It is also possible to use potassium hydrogen carbonate (KHCO 3 ).
【００４３】また、これら以外に炭酸ナトリウム（Ｎａ
2ＣＯ3)、炭酸カリウム（Ｋ2ＣＯ3)、酢酸ナトリウム
（ＣＨ3ＣＯＯＮａ）等の弱アルカリ性液を使用するこ
とも可能である。In addition to these, sodium carbonate (Na
It is also possible to use a weak alkaline liquid such as 2 CO 3 ), potassium carbonate (K 2 CO 3 ), sodium acetate (CH 3 COONa).
【００４４】いずれにしても、本発明においては弱アル
カリ性液の種類は問うものではないが、緩衝作用が良好
である等の観点からは、上記のような炭酸水素ナトリウ
ム（ＮａＨＣＯ3)や炭酸水素カリウム（ＫＨＣＯ3)を使
用するのが好ましい。In any case, in the present invention, the kind of the weak alkaline liquid does not matter, but from the viewpoint of having a good buffering effect, sodium hydrogen carbonate (NaHCO 3 ) or hydrogen carbonate as described above is used. Preference is given to using potassium (KHCO 3 ).
【００４５】また、硫酸アンモニウム[(ＮＨ4)2Ｓ
Ｏ4]、硝酸アンモニウム〔ＮＨ4ＮＯ3]、塩化アンモニ
ウム〔ＮＨ4Ｃｌ〕等の弱酸性液を使用することも可能
である。In addition, ammonium sulfate [(NH 4 ) 2 S
It is also possible to use a weakly acidic liquid such as O 4 ], ammonium nitrate [NH 4 NO 3 ] or ammonium chloride [NH 4 Cl].
【００４６】要は、原水の被処理水の性状に応じて弱ア
ルカリ性液又は弱酸性液を適宜選択して使用すればよ
い。In short, a weak alkaline liquid or a weak acidic liquid may be appropriately selected and used according to the properties of the raw water to be treated.
【００４７】尚、本発明は、上記のような純水製造工場
排水の処理を主眼とするものであるが、これ以外の被処
理水の処理に本発明を適用することも可能であり、対象
となる被処理水の種類は問わない。Although the present invention mainly focuses on the treatment of waste water from the pure water manufacturing plant as described above, the present invention can also be applied to treatment of water to be treated other than this. The type of water to be treated does not matter.
【００４８】[0048]
【発明の効果】叙上のように、本発明においては、有機
性排水等の被処理水のｐＨを第１ｐＨ調整槽で強アルカ
リ又は強酸を添加して調整した後、第２ｐＨ調整槽で弱
アルカリ性液又は弱酸性液を添加して調整し、その後に
生物処理槽内で生物処理を行うため、第１ｐＨ調整槽で
強アルカリ又は強酸が添加されることにより、原水とし
ての被処理液の性状に応じてｐＨが一定値に保たれ、ま
た第２ｐＨ調整槽で弱アルカリ性液又は弱酸性液が添加
されることにより、後段の生物処理槽で発生する酸成
分、アルカリ成分が中和され、生物処理に好適なｐＨ値
が維持できるという効果がある。As described above, in the present invention, the pH of water to be treated such as organic waste water is adjusted in the first pH adjusting tank by adding a strong alkali or strong acid, and then adjusted in the second pH adjusting tank. The condition of the liquid to be treated as raw water by adding a strong alkali or a strong acid in the first pH adjusting tank to adjust by adding an alkaline liquid or weakly acidic liquid and then perform biological treatment in the biological treatment tank The pH is maintained at a constant value in accordance with the above, and by adding a weak alkaline liquid or a weak acidic liquid in the second pH adjusting tank, the acid component and alkaline component generated in the biological treatment tank in the subsequent stage are neutralized, There is an effect that the pH value suitable for the treatment can be maintained.
【００４９】特に、弱アルカリ性液又は弱酸性液として
緩衝作用を有するものを使用すれば、原水のｐＨの極端
な変動を防止し、かつ生物処理に好適なｐＨ値にあらか
じめ調整しておくことができるとともに、生物処理を行
うのに適当なｐＨ値を維持することができ、従って被処
理水が水質の緩衝能力の極めて低い純水排水や超純水排
水の場合であっても、排水の生物処理に際してのｐＨの
調整を容易に行うことができるという顕著な効果があ
る。Particularly, when a weak alkaline liquid or a weak acidic liquid having a buffering action is used, it is possible to prevent extreme fluctuations in the pH of the raw water and to adjust the pH value to a value suitable for biological treatment in advance. In addition to being able to maintain the pH value suitable for biological treatment, even if the water to be treated is pure water drainage or ultrapure water drainage with extremely low water quality buffering ability, There is a remarkable effect that the pH can be easily adjusted during the treatment.
【図１】一実施例の純水排水、超純水排水の処理方法に
用いられる処理装置の概略ブロック図。FIG. 1 is a schematic block diagram of a treatment apparatus used in a method for treating pure water drainage and ultrapure water drainage according to one embodiment.
【図２】他実施例の処理方法に用いられる装置の概略ブ
ロック図。FIG. 2 is a schematic block diagram of an apparatus used in a processing method of another embodiment.
【図３】他実施例の処理方法に用いられる装置の概略ブ
ロック図。FIG. 3 is a schematic block diagram of an apparatus used in a processing method of another embodiment.
【図４】従来の処理方法に用いられる装置の概略ブロッ
ク図。FIG. 4 is a schematic block diagram of an apparatus used in a conventional processing method.
２…第１ｐＨ調整槽 ６…第２ｐＨ調整
槽 ８…生物処理槽2 ... 1st pH adjusting tank 6 ... 2nd pH adjusting tank 8 ... Biological treatment tank
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０２Ｆ 1/66 Ｂ Ｆ ５３０ Ｂ Ｇ Ｌ Ｐ ５４０ Ｊ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Office reference number FI technical display location C02F 1/66 BF 530 BGLP 540 J
Claims (3)
ｐＨ調整槽(2) で強アルカリ又は強酸を添加して調整し
た後、第２ｐＨ調整槽(6) で弱アルカリ性液又は弱酸性
液を添加して調整し、その後、生物処理槽(8) 内で生物
処理を行って前記被処理水を処理することを特徴とする
有機性排水等の被処理水の処理方法。1. The pH of treated water such as organic waste water is adjusted to
After adjusting by adding strong alkali or strong acid in pH adjusting tank (2), adjust by adding weak alkaline liquid or weak acidic liquid in second pH adjusting tank (6), and then in biological treatment tank (8) A method for treating treated water such as organic waste water, which comprises subjecting the treated water to biological treatment by the method described above.
酸水素ナトリウム、炭酸ナトリウム、炭酸カリウム、炭
酸水素カリウム、酢酸ナトリウム、又は硫酸アンモニウ
ム、硝酸アンモニウム、塩化アンモニウムである請求項
１記載の有機性排水等の被処理水の処理方法。2. The organic wastewater according to claim 1, wherein the weak alkaline liquid or weak acidic liquid is sodium hydrogen carbonate, sodium carbonate, potassium carbonate, potassium hydrogen carbonate, sodium acetate, or ammonium sulfate, ammonium nitrate, or ammonium chloride. Method for treating untreated water.
は強酸を添加して前記被処理水のｐＨを調整する第１ｐ
Ｈ調整槽(2) と、前記被処理水に弱アルカリ性液又は弱
酸性液を添加して該被処理水のｐＨを調整する第２ｐＨ
調整槽(6) と、前記第１ｐＨ調整槽(2) 及び第２ｐＨ調
整槽(6) でｐＨが調整された被処理水の生物処理を行う
生物処理槽(8) とを具備したことを特徴とする有機性排
水等の被処理水の処理装置。3. A first p for adjusting the pH of the water to be treated by adding a strong alkali or a strong acid to the water to be treated such as organic waste water.
H adjusting tank (2) and a second pH for adjusting the pH of the water to be treated by adding a weak alkaline liquid or a weak acid liquid to the water to be treated
It is characterized by comprising an adjusting tank (6) and a biological treatment tank (8) for biological treatment of the water to be treated whose pH is adjusted by the first pH adjusting tank (2) and the second pH adjusting tank (6). A treatment device for treated water such as organic wastewater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6041602A JPH07251184A (en) | 1994-03-11 | 1994-03-11 | Treatment of water to be treated such as organic waste water and device therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6041602A JPH07251184A (en) | 1994-03-11 | 1994-03-11 | Treatment of water to be treated such as organic waste water and device therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07251184A true JPH07251184A (en) | 1995-10-03 |
Family
ID=12612934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6041602A Pending JPH07251184A (en) | 1994-03-11 | 1994-03-11 | Treatment of water to be treated such as organic waste water and device therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07251184A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1076282A (en) * | 1996-09-04 | 1998-03-24 | Japan Organo Co Ltd | Method and apparatus for supercritical hydroxylation treatment of organic chlorine compound |
| JP2017192871A (en) * | 2016-04-18 | 2017-10-26 | 宇部興産株式会社 | Acidic water neutralizer, and neutralizing method of acidic water |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5241452A (en) * | 1975-09-26 | 1977-03-31 | Tokuyama Sekisui Kogyo Kk | Neutralizing method for waste water |
| JPS5523114B2 (en) * | 1975-08-02 | 1980-06-20 | ||
| JPS62258793A (en) * | 1986-05-01 | 1987-11-11 | O H L:Kk | Method for neutralizing high-concentration alkali solution |
| JPH05329477A (en) * | 1991-08-08 | 1993-12-14 | Kurita Water Ind Ltd | Membrane separation |
| JPH0623385A (en) * | 1992-03-11 | 1994-02-01 | Ciba Geigy Ag | Method of purifying water |
-
1994
- 1994-03-11 JP JP6041602A patent/JPH07251184A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5523114B2 (en) * | 1975-08-02 | 1980-06-20 | ||
| JPS5241452A (en) * | 1975-09-26 | 1977-03-31 | Tokuyama Sekisui Kogyo Kk | Neutralizing method for waste water |
| JPS62258793A (en) * | 1986-05-01 | 1987-11-11 | O H L:Kk | Method for neutralizing high-concentration alkali solution |
| JPH05329477A (en) * | 1991-08-08 | 1993-12-14 | Kurita Water Ind Ltd | Membrane separation |
| JPH0623385A (en) * | 1992-03-11 | 1994-02-01 | Ciba Geigy Ag | Method of purifying water |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1076282A (en) * | 1996-09-04 | 1998-03-24 | Japan Organo Co Ltd | Method and apparatus for supercritical hydroxylation treatment of organic chlorine compound |
| JP2017192871A (en) * | 2016-04-18 | 2017-10-26 | 宇部興産株式会社 | Acidic water neutralizer, and neutralizing method of acidic water |
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