JP2015080734A - Apparatus and method for treating waste water - Google Patents

Apparatus and method for treating waste water Download PDF

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JP2015080734A
JP2015080734A JP2013218427A JP2013218427A JP2015080734A JP 2015080734 A JP2015080734 A JP 2015080734A JP 2013218427 A JP2013218427 A JP 2013218427A JP 2013218427 A JP2013218427 A JP 2013218427A JP 2015080734 A JP2015080734 A JP 2015080734A
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JP5996508B2 (en
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安佐美 齋藤
Asami Saito
安佐美 齋藤
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Tokyo Gas Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an apparatus and a method for treating waste water, in each of which organic matter treatment and chromaticity reduction can be performed stably in an electrolytic treatment tank even when the amount of the solid matter in the waste water is fluctuated, maintenance management of the electrode or other instruments to be used in the electrolytic treatment tank can be simplified and the amount of the industrial waste to be treated can be reduced effectively.SOLUTION: An apparatus 1 for treating waste water, in which the solid matter-containing waste water is treated electrolytically, includes: a storage tank 4 for storing the solid matter-containing sludge water separated from the waste water; an adjustment part for mixing the solid matter, which is contained in the sludge water stored in the storage tank 4, in the separated water obtained by separating the solid matter from the waste water so that the solid matter concentration of the separated water is adjusted; and an electrolytic treatment tank 6 for electrolytically treating the separated water having the solid matter concentration adjusted by the adjustment part.

Description

本発明は排水処理装置及び排水処理方法に関し、特に、固形物を含む着色排水を処理するのに適した排水処理装置及び排水処理方法に関する。   The present invention relates to a wastewater treatment apparatus and a wastewater treatment method, and more particularly to a wastewater treatment apparatus and a wastewater treatment method suitable for treating colored wastewater containing solid matter.

従来から、工場等から排出される有機性排水(有機物を含む排水)の処理方法として、例えば凝集沈殿法や活性汚泥法、あるいはそれらを組み合わせた方法が知られている。凝集沈殿法は、排水に薬剤を投入し、排水中に含まれる汚泥を凝集させて沈殿させる方法である。また、活性汚泥法は、好気性微生物を利用し、曝気槽中で有機物を生物分解する方法である。   Conventionally, as a method for treating organic wastewater (drainage containing organic matter) discharged from a factory or the like, for example, a coagulation sedimentation method, an activated sludge method, or a method combining them is known. The coagulation sedimentation method is a method in which a chemical is put into wastewater and sludge contained in the wastewater is aggregated and precipitated. The activated sludge method is a method of biodegrading organic substances in an aeration tank using aerobic microorganisms.

ところで、上記した凝集沈殿法や活性汚泥法による処理方法は、例えば、排水に応じた薬剤の選定が難しいといった問題や処理時間が長いといった問題、設備全体が大型化するといった問題がある。そこで、近年では、排水処理に要する時間を短縮したり設備全体を小型化するために、有機性排水中に電極を挿入してその排水中に電流を流すことにより、電極表面で直接的にあるいは酸化剤を生成して間接的に有機物を分解する電解法による処理方法が提案されている。   By the way, the above-described treatment methods using the coagulation sedimentation method and the activated sludge method have, for example, a problem that it is difficult to select a chemical according to drainage, a problem that the treatment time is long, and a problem that the entire equipment is enlarged. Therefore, in recent years, in order to shorten the time required for wastewater treatment or to reduce the size of the entire equipment, an electrode is inserted into organic wastewater and a current is passed through the wastewater, either directly on the electrode surface or A treatment method using an electrolytic method in which an oxidant is generated to indirectly decompose organic substances has been proposed.

このような電解法による従来の処理方法として、特許文献1には、COD成分、BOD成分、油分、重金属を含む排水を電解処理槽に供給して汚泥の発生を抑制しながら電解処理するようにした排水処理方法において、電気分解によって生成され、かつ排水によって消費される成分の量を測定し、この測定結果に基づいて電解密度や電解処理槽に供給される排水の量を増減させる方法が開示されている。   As a conventional treatment method using such an electrolysis method, in Patent Document 1, wastewater containing a COD component, a BOD component, an oil component, and a heavy metal is supplied to an electrolytic treatment tank so as to perform electrolytic treatment while suppressing generation of sludge. A method for measuring the amount of components produced by electrolysis and consumed by wastewater and increasing or decreasing the electrolytic density or the amount of wastewater supplied to the electrolytic treatment tank based on the measurement results is disclosed. Has been.

特許文献1に開示される従来の排水処理装置及び排水処理方法によれば、排水中の残留塩素量等に基づいて電流密度を増減させることによって汚濁負荷の大きい排水を安定して処理することができ、PAC(ポリ塩化アルミニウム)や凝集助剤等のように環境負荷の大きい薬品を使用しないで汚泥量を低減することができる。また、排水中の残留塩素量等が多い場合には電解処理槽への排水の供給量を増加させ、排水中の残留塩素量等が少ない場合には電解処理槽への排水の供給量を減少させることによって、汚濁負荷の大きい排水を安定して処理することができる。   According to the conventional wastewater treatment apparatus and wastewater treatment method disclosed in Patent Document 1, wastewater with a large pollution load can be stably treated by increasing or decreasing the current density based on the amount of residual chlorine in the wastewater. In addition, the amount of sludge can be reduced without using chemicals with a large environmental load such as PAC (polyaluminum chloride) or a coagulant aid. Also, increase the amount of wastewater supplied to the electrolytic treatment tank when the amount of residual chlorine in the wastewater is large, and decrease the amount of wastewater supplied to the electrolytic treatment tank when the amount of residual chlorine in the wastewater is small. By doing so, wastewater with a large pollution load can be treated stably.

特開2008−212816号公報JP 2008-212816 A

しかしながら、特許文献1に開示される従来の排水処理装置及び排水処理方法においては、排水中の有機物等の固形物量が変動した際に電解処理槽における固形物濃度も変動し、当該電解処理槽で安定的に有機物処理や色度低減を行うことができないといった問題や、電解処理槽で使用する電極等への固形物の付着量が変動してその維持管理が煩雑となるといった問題がある。また、濾過処理もしくは分離処理によって排水から分離された固形物(SS(suspended solids:懸濁物質)ともいう。)は産業廃棄物として処理する必要があるが、産廃処理量を可能な限り減少させたいといった要望もある。   However, in the conventional wastewater treatment apparatus and wastewater treatment method disclosed in Patent Document 1, when the amount of solids such as organic matter in the wastewater fluctuates, the solids concentration in the electrolytic treatment tank also fluctuates. There is a problem that organic matter treatment and chromaticity reduction cannot be performed stably, and a problem that the amount of solid matter attached to an electrode or the like used in an electrolytic treatment tank fluctuates and its maintenance becomes complicated. Solids separated from wastewater by filtration or separation treatment (also called suspended solids (SS)) must be treated as industrial waste, but the amount of industrial waste treatment is reduced as much as possible. There is also a demand for it.

本発明は上記した問題に鑑みてなされたものであり、排水中の固形物量が変動した場合であっても電解処理槽で安定的に有機物処理や色度低減を行うことができ、電解処理槽で使用する電極等の維持管理を簡素化できるとともに、産廃処理量を効果的に低減することができる排水処理装置及び排水処理方法を提供することを目的とする。   The present invention has been made in view of the above-described problems, and even when the amount of solid matter in the waste water fluctuates, it can stably perform organic matter treatment and chromaticity reduction in the electrolytic treatment tank. An object of the present invention is to provide a wastewater treatment apparatus and a wastewater treatment method capable of simplifying the maintenance and management of electrodes and the like used in the process and effectively reducing the industrial waste treatment amount.

本発明は、酸化力の強い次亜塩素酸等を生成し得る電極を用いた電解処理では、電解処理槽における固形物濃度(特にCOD(Chemical oxygen demand:化学的酸素要求量)濃度)が僅かに増加した場合であっても、電極等の劣化を抑制しながら排水に含まれる固形物(特にCOD成分)を十分に酸化分解し得るという本発明者等による実験から得られた知見に基づくものである。   According to the present invention, in the electrolytic treatment using an electrode capable of generating hypochlorous acid or the like having strong oxidizing power, the solid concentration (particularly COD (Chemical oxygen demand) concentration) in the electrolytic treatment tank is small. Based on the knowledge obtained from experiments by the present inventors that solid substances (especially COD components) contained in wastewater can be sufficiently oxidized and decomposed while suppressing deterioration of electrodes, etc. It is.

すなわち、前記目的を達成すべく、本発明の排水処理装置は、固形物を含む排水を電解処理する排水処理装置であって、前記排水から分離された固形物を含む汚泥水を貯留する貯留槽と、前記貯留槽に貯留された汚泥水に含まれる固形物を前記排水から固形物が分離された分離水に混合して前記分離水の固形物濃度を調整する調整部と、前記調整部によって固形物濃度が調整された分離水を電解処理する電解処理槽と、を備えているものである。   That is, in order to achieve the above object, the wastewater treatment apparatus of the present invention is a wastewater treatment apparatus for electrolytically treating wastewater containing solids, and stores a sludge water containing solids separated from the wastewater. And an adjusting unit that adjusts the solids concentration of the separated water by mixing solids contained in the sludge water stored in the storage tank with the separated water from which the solids are separated from the drainage, and the adjusting unit. And an electrolytic treatment tank for electrolytically treating the separated water whose solid concentration is adjusted.

排水から固形物が分離された分離水の固形物濃度は、排水中の固形物量が変動した際に変動する可能性があるものの、上記する態様によれば、貯留槽に貯留された汚泥水に含まれる固形物を排水から固形物が分離された分離水に混合して前記分離水の固形物濃度を調整部により調整し、固形物濃度が調整された分離水を電解処理槽で電解処理することで、排水中の固形物量が変動した場合であっても電解処理で使用する分離水の固形物濃度を調整することができ、その電解処理槽で安定的に有機物処理や色度低減を行うことができ、電解処理槽で使用する電極等の維持管理を簡素化することができる。また、分離水の固形物濃度を調整するに当たり、貯留槽に貯留された汚泥水に含まれる固形物を分離水に混合することで、貯留槽中の固形物を有効利用しながら産廃処理量を効果的に低減することができる。   Although the solids concentration of the separated water from which the solids are separated from the wastewater may change when the amount of solids in the wastewater fluctuates, according to the above aspect, the sludge water stored in the storage tank The contained solid matter is mixed with the separated water from which the solid matter is separated from the waste water, the solid concentration of the separated water is adjusted by the adjusting unit, and the separated water whose solid concentration is adjusted is subjected to electrolytic treatment in the electrolytic treatment tank. Therefore, even if the amount of solid matter in the wastewater fluctuates, the solid matter concentration of the separation water used in the electrolytic treatment can be adjusted, and the organic treatment and chromaticity reduction can be stably performed in the electrolytic treatment tank. It is possible to simplify the maintenance of the electrodes used in the electrolytic treatment tank. Moreover, when adjusting the solid matter concentration of the separated water, the solid waste contained in the sludge water stored in the storage tank is mixed with the separated water, so that the amount of industrial waste treatment can be reduced while effectively using the solid matter in the storage tank. It can be effectively reduced.

ここで、排水に含まれる固形物は、電解処理槽で使用される電極で生成される次亜塩素酸等で分解される、COD成分、BOD(Biochemicaloxygen demand:生物学的酸素要求量)成分、油分等を含むものである。電解処理槽で使用される電極としては、不溶解性の導電体であれば特に限定されるものではないが、例えば、チタン(Ti)等の基板に白金(Pt)、イリジウム(Ir)、Ta(タンタル)、Ru(ルテニウム)の単体、もしくはそれらの酸化物等の合金からなる貴金属被覆が形成された電極などが挙げられる。また、電極として貴金属被覆が形成された電極を採用する場合、その貴金属被覆の形成方法としては、例えば焼付け法、メッキ法、クラッド法などを適用することができる。当該電極に通電すると、電気分解により、負極側では水酸化物が生成され、正極側では排水中の塩化物イオン(Cl)から塩素(Cl)が生成される。そして、このように生成された塩素(Cl)から活性酸素(O)や次亜塩素酸(HClO)が生成され、その活性酸素(O)や次亜塩素酸(HClO)によって、COD成分、BOD成分、油分等の固形物を含む分解水が酸化分解されることとなる。 Here, the solid matter contained in the waste water is decomposed by hypochlorous acid or the like produced by the electrode used in the electrolytic treatment tank, a COD component, a BOD (Biochemicaloxygen demand) component, Contains oil. The electrode used in the electrolytic treatment tank is not particularly limited as long as it is an insoluble conductor. For example, platinum (Pt), iridium (Ir), Ta on a substrate of titanium (Ti) or the like. (Tantalum), Ru (ruthenium), or an electrode on which a noble metal coating made of an alloy such as an oxide thereof is formed. When an electrode with a noble metal coating is used as the electrode, a baking method, a plating method, a cladding method, or the like can be applied as a method for forming the noble metal coating. When the electrode is energized, by electrolysis, hydroxide is generated on the negative electrode side, and chlorine (Cl 2 ) is generated from chloride ions (Cl ) in the waste water on the positive electrode side. Then, active oxygen (O 2 ) and hypochlorous acid (HClO) are generated from the chlorine (Cl 2 ) thus generated, and COD is generated by the active oxygen (O 2 ) and hypochlorous acid (HClO). Decomposed water containing solids such as components, BOD components, and oil components is oxidatively decomposed.

また、上記する排水処理装置の好ましい態様は、前記調整部が、前記貯留槽に貯留された汚泥水を送出する送出部と、前記送出部によって送出された汚泥水と前記分離水を混合する混合槽と、前記混合槽で混合されて生成された固形物を含む分離水を前記電解処理槽に供給する供給ラインと、前記混合槽における固形物濃度を検出する検出器と、前記検出器による検出結果に基づいて前記送出部により送出される汚泥水の量を制御する制御部と、を有しているものである。   Moreover, the preferable aspect of the waste water treatment apparatus described above is such that the adjusting unit sends out the sludge water stored in the storage tank, and mixes the sludge water sent out by the sending unit and the separated water. A tank, a supply line for supplying separated water containing the solid matter produced by mixing in the mixing tank to the electrolytic treatment tank, a detector for detecting a solid concentration in the mixing tank, and detection by the detector And a control unit for controlling the amount of sludge water delivered by the delivery unit based on the result.

上記する態様によれば、混合槽における固形物濃度を検出し、その検出結果に基づいて混合槽に送出される汚泥水の量を制御しながら、当該混合槽で貯留槽に貯留された汚泥水と分離水を予め混合し、混合槽で混合されて生成された固形物を含む分離水を電解処理槽に供給することで、例えば電解処理槽における固形物濃度を適切に維持することができるため、当該電解処理槽で継続的に電解処理を行うことができる。   According to the aspect described above, the sludge water stored in the storage tank in the mixing tank while detecting the solid concentration in the mixing tank and controlling the amount of sludge water sent to the mixing tank based on the detection result. For example, the solid concentration in the electrolytic treatment tank can be appropriately maintained by supplying the separation water containing the solid matter generated by mixing the liquid and the separation water in advance in the mixing tank to the electrolytic treatment tank. The electrolytic treatment can be continuously performed in the electrolytic treatment tank.

また、上記する排水処理装置の好ましい態様は、前記調整部が、前記貯留槽に貯留された汚泥水を前記電解処理槽に送出する送出部と、前記電解処理槽における固形物濃度を検出する検出器と、前記検出器による検出結果に基づいて前記送出部により送出される汚泥水の量を制御する制御部と、を有しているものである。   Moreover, the preferable aspect of the waste water treatment apparatus mentioned above is the detection which the said adjustment part detects the solid substance density | concentration in the sending part which sends the sludge water stored in the said storage tank to the said electrolytic treatment tank, and the said electrolytic treatment tank And a control unit for controlling the amount of sludge water delivered by the delivery unit based on the detection result by the detector.

上記する態様によれば、電解処理槽における固形物濃度を検出し、その検出結果に基づいて電解処理槽に直接的に送出される汚泥水の量を制御しながら、当該電解処理槽で貯留槽に貯留された汚泥水と分離水を混合しかつ固形物を含む分離水を電解処理することで、貯留槽から電解処理槽へ汚泥水が直接的に供給されるため、当該排水処理装置全体を小型化かつ簡素化することができる。   According to the aspect described above, while detecting the solid concentration in the electrolytic treatment tank and controlling the amount of sludge water sent directly to the electrolytic treatment tank based on the detection result, the storage tank in the electrolytic treatment tank By mixing the sludge water stored in the tank and the separated water and subjecting the separated water containing the solid matter to electrolytic treatment, the sludge water is directly supplied from the storage tank to the electrolytic treatment tank. It can be downsized and simplified.

なお、貯留槽に貯留された汚泥水と分離水を混合するに当たり、積極的に汚泥水と分離水を撹拌するために、例えばプロペラ等からなる撹拌機を混合槽や電解処理槽に配設してもよい。   In addition, when mixing the sludge water stored in the storage tank and the separated water, in order to actively agitate the sludge water and the separated water, a stirrer made of, for example, a propeller is disposed in the mixing tank or the electrolytic treatment tank. May be.

また、本発明の排水処理方法は、固形物を含む排水を電解処理する排水処理方法であって、前記排水から分離された固形物を含む汚泥水を貯留する貯留工程と、貯留された汚泥水に含まれる固形物を前記排水から固形物が分離された分離水に混合して前記分離水の固形物濃度を調整する調整工程と、固形物濃度が調整された分離水を電解処理する電解処理工程と、からなる方法である。   Further, the wastewater treatment method of the present invention is a wastewater treatment method for electrolytically treating wastewater containing solid matter, a storage step for storing sludge water containing solid matter separated from the wastewater, and stored sludge water Adjusting step of adjusting the solid concentration of the separated water by mixing the solid matter contained in the waste water from which the solid matter is separated from the waste water, and electrolytic treatment of electrolytically treating the separated water having the adjusted solid concentration A process comprising:

上記する方法によれば、貯留工程で貯留された汚泥水に含まれる固形物を排水から固形物が分離された分離水に混合して前記分離水の固形物濃度を調整し、固形物濃度が調整されたその分離水を電解処理することで、排水中の固形物量が変動した場合であっても電解処理で使用する分離水の固形物濃度を調整することができ、その電解処理工程で安定的に有機物処理や色度低減を行うことができ、電解処理工程で使用する電極等の維持管理を簡素化することができる。また、分離水の固形物濃度を調整するに当たり、貯留工程で貯留された汚泥水に含まれる固形物を分離水に混合することで、排水中の固形物を有効利用しながら産廃処理量を効果的に低減することができる。   According to the method described above, the solid matter contained in the sludge water stored in the storage step is mixed with the separated water from which the solid matter is separated from the waste water to adjust the solid matter concentration of the separated water, By electrolyzing the adjusted separated water, the solids concentration of the separated water used in the electrolysis can be adjusted even when the amount of solids in the wastewater fluctuates, and is stable in the electrolysis process. In particular, organic treatment and chromaticity reduction can be performed, and maintenance and management of electrodes and the like used in the electrolytic treatment process can be simplified. Also, when adjusting the solids concentration of the separated water, the solid waste contained in the sludge water stored in the storage process is mixed with the separated water, so that the industrial waste treatment amount is effectively utilized while effectively using the solids in the wastewater. Can be reduced.

以上の説明から理解できるように、本発明の排水処理装置及び排水処理方法によれば、排水中に含まれる固形物を前記排水から固形物が分離された分離水に混合して電解処理を行う際の分離水の固形物濃度を調整することにより、排水中の固形物量が変動した場合であっても電解処理槽で安定的に有機物処理や色度低減を行うことができ、電解処理槽で使用する電極等の維持管理を簡素化できるとともに、産廃処理量を効果的に低減することができる。   As can be understood from the above description, according to the wastewater treatment apparatus and wastewater treatment method of the present invention, the solid matter contained in the wastewater is mixed with the separated water from which the solid matter has been separated from the wastewater, and the electrolytic treatment is performed. By adjusting the solids concentration of the separated water at the time, even if the amount of solids in the wastewater fluctuates, it is possible to stably perform organic matter treatment and chromaticity reduction in the electrolytic treatment tank, Maintenance and management of the electrodes to be used can be simplified and the industrial waste processing amount can be effectively reduced.

本発明による排水処理装置の実施の形態1の基本構成を示す全体構成図。BRIEF DESCRIPTION OF THE DRAWINGS The whole block diagram which shows the basic composition of Embodiment 1 of the waste water treatment equipment by this invention. 本発明による排水処理装置の実施の形態2の基本構成を示す全体構成図。The whole block diagram which shows the basic composition of Embodiment 2 of the waste water treatment equipment by this invention. 本発明による排水処理装置の実施の形態3の基本構成を示す全体構成図。The whole block diagram which shows the basic composition of Embodiment 3 of the waste water treatment equipment by this invention. 本発明による排水処理装置の実施の形態4の基本構成を示す全体構成図。The whole block diagram which shows the basic composition of Embodiment 4 of the waste water treatment equipment by this invention. 実施例による検査用試料の電解処理前および電解処理後の溶存CODと全量CODを示す図。The figure which shows the dissolved COD before the electrolytic treatment of the test sample by an Example, and the total amount COD after the electrolytic treatment. 実施例による検査用試料の電解処理前および電解処理後の色度を示す図。The figure which shows the chromaticity before the electrolytic treatment of the test sample by an Example, and after an electrolytic treatment.

以下、図面を参照しながら、本発明の実施の形態を説明する。なお、本発明は、例えば下水処理、畜産排水処理、水産食品加工排水処理、洗浄排水処理、工場排水処理、湖水浄化処理等といった、COD成分、BOD成分、油分等の固形物を含む排水の処理に有効に適用し得る。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is processing of the waste_water | drain containing solid matters, such as COD component, BOD component, oil content, such as sewage treatment, livestock wastewater treatment, fishery food processing wastewater treatment, washing wastewater treatment, factory wastewater treatment, lake water purification treatment etc. It can be effectively applied to.

[実施の形態1]
図1は、本発明による排水処理装置の実施の形態1の基本構成を示したものである。図示するように、本実施の形態1の排水処理装置1は、主に、原水槽2と、分離装置3と、貯留槽4と、混合槽5と、電解処理槽6と、送水ポンプ(送出部)7と、制御部8と、を備えている。
[Embodiment 1]
FIG. 1 shows the basic configuration of Embodiment 1 of a wastewater treatment apparatus according to the present invention. As shown in the figure, the wastewater treatment apparatus 1 of the first embodiment is mainly composed of a raw water tank 2, a separation apparatus 3, a storage tank 4, a mixing tank 5, an electrolytic treatment tank 6, and a water pump (delivery). Part) 7 and a control part 8.

原水槽2は、例えば工場や家庭等から排出される、COD成分、BOD成分、油分等の固形物を含む排水を貯留するためのものであり、原水槽2に貯留された排水はラインL1を介して定期的に分離装置3へ供給される。   The raw water tank 2 is for storing wastewater containing solid matter such as COD components, BOD components, oils, etc. discharged from factories or homes, for example. The wastewater stored in the raw water tank 2 is connected to the line L1. And periodically supplied to the separation device 3.

分離装置3は、例えば脱水機やフィルタ、自然静置槽等から構成され、原水槽2から供給された排水を、相対的に大量の固形物を含む汚泥水と相対的に少量の固形物を含む分離水とに分離するためのものである。分離装置3によって排水から分離された固形物を含む汚泥水は、ラインL2を介して貯留槽4に供給され、分離装置3によって排水から分離された分離水は、ラインL3を介して混合槽5へ供給される。貯留槽4に貯留された汚泥水は、後述する制御部8によって駆動制御される送水ポンプ7によりラインL4を介して混合槽5へ送出される。なお、貯留槽4に送水ポンプ7により混合槽5へ送出されない汚泥水がある場合、その汚泥水は不図示のラインを介して産廃処理場等へ搬出されることとなる。   The separation device 3 is composed of, for example, a dehydrator, a filter, a natural stationary tank, and the like, and the wastewater supplied from the raw water tank 2 is converted into sludge water containing a relatively large amount of solids and a relatively small amount of solids. It is for separating into separated water. Sludge water containing solid matter separated from the waste water by the separation device 3 is supplied to the storage tank 4 via the line L2, and the separated water separated from the waste water by the separation device 3 is mixed into the mixing tank 5 via the line L3. Supplied to. The sludge water stored in the storage tank 4 is sent to the mixing tank 5 through the line L4 by the water pump 7 that is driven and controlled by the control unit 8 described later. In addition, when there exists sludge water which is not sent to the mixing tank 5 by the water pump 7 in the storage tank 4, the sludge water will be carried out to an industrial waste treatment plant etc. via a line not shown.

混合槽5は、ラインL3を介して分離装置3から供給される分離水とラインL4を介して貯留槽4から供給される汚泥水を混合して所定の固形物濃度の分離水を生成するものである。なお、混合槽5には、分離水と汚泥水とを積極的に撹拌するために、例えばプロペラ等からなる撹拌機5aが配設されている。この混合槽5で生成された所定の固形物濃度の分離水は、ライン(供給ライン)L5を介して定期的に所定量が電解処理槽6へ供給される。   The mixing tank 5 mixes the separated water supplied from the separation device 3 via the line L3 and the sludge water supplied from the storage tank 4 via the line L4 to generate separated water having a predetermined solid concentration. It is. The mixing tank 5 is provided with a stirrer 5a made of, for example, a propeller in order to actively stir the separated water and the sludge water. A predetermined amount of the separated water having a predetermined solid concentration generated in the mixing tank 5 is periodically supplied to the electrolytic treatment tank 6 through a line (supply line) L5.

電解処理槽6は正極電極6a及び負極電極6bを有しており、混合槽5から供給される固形物を含む分離水を電解処理するものである。ここで、電解処理槽6で使用される電極6a、6bとしては、例えば、チタン(Ti)等の基板に白金(Pt)、イリジウム(Ir)、Ta(タンタル)、Ru(ルテニウム)の単体、もしくはそれらの酸化物等の合金からなる貴金属被覆が形成された電極などが挙げられる。この電極6a、6bに所定の電流で所定の時間だけ通電すると、電気分解により、負極電極6bでは水酸化物が生成され、正極電極6aでは以下の式(1)のように排水中の塩化物イオン(Cl)から塩素(Cl)が生成される。そして、このように生成された塩素(Cl)から以下の式(2)、(3)のように活性酸素(O)や次亜塩素酸(HClO)が生成され、その活性酸素(O)や次亜塩素酸(HClO)によって、COD成分、BOD成分、油分等が酸化分解されることとなる。 The electrolytic treatment tank 6 has a positive electrode 6 a and a negative electrode 6 b, and performs electrolytic treatment of separated water containing solids supplied from the mixing tank 5. Here, as the electrodes 6a and 6b used in the electrolytic treatment tank 6, for example, platinum (Pt), iridium (Ir), Ta (tantalum), Ru (ruthenium) alone on a substrate such as titanium (Ti), Or the electrode etc. in which the noble metal coating which consists of alloys, such as those oxides, were formed are mentioned. When the electrodes 6a and 6b are energized with a predetermined current for a predetermined time, by electrolysis, hydroxides are generated in the negative electrode 6b, and chlorides in the waste water are expressed in the positive electrode 6a as shown in the following formula (1). Chlorine (Cl 2 ) is generated from the ions (Cl ). Then, active oxygen (O 2 ) and hypochlorous acid (HClO) are generated from the chlorine (Cl 2 ) generated in this way as in the following formulas (2) and (3), and the active oxygen (O 2 ) 2 ) and hypochlorous acid (HClO), the COD component, the BOD component, the oil component and the like are oxidatively decomposed.

[化1]
2Cl→Cl+2e ・・・(1)
Cl+HO→1/2O+2HCl ・・・(2)
Cl+HO→HCl+HClO ・・・(3)
[Chemical 1]
2Cl → Cl 2 + 2e (1)
Cl 2 + H 2 O → 1 / 2O 2 + 2HCl (2)
Cl 2 + H 2 O → HCl + HClO (3)

そして、電解処理槽6で電解処理された処理水は、ラインL6を介して海洋や河川、下水道等に放流される。   And the treated water electrolyzed in the electrolytic treatment tank 6 is discharged to the ocean, rivers, sewers, etc. via the line L6.

制御部8は、上記したように電解処理槽6における分離水の固形物濃度、すなわち混合槽5において分離水と汚泥水を混合して生成した分離水の固形物濃度を所定の濃度に維持するためのものである。混合槽5、処理水を放流するためのラインL6にはそれぞれ、固形物濃度や色度を検出するための検出器S1、S2が配設され、制御部8は、各検出器S1、S2で検出される検出結果を受信し、その検出結果に基づいて貯留槽4から混合槽5へ供給する汚泥水の量を演算する。制御部8は、その演算結果を送水ポンプ7に送信して当該送水ポンプ7(例えば送水ポンプ7の送出圧や送出時間等)を制御することで、所定量の汚泥水が貯留槽4から混合槽5へ供給され、混合槽5で所定の固形物濃度を有する分離水が生成されることとなる。   As described above, the control unit 8 maintains the solid concentration of the separated water in the electrolytic treatment tank 6, that is, the solid concentration of the separated water generated by mixing the separated water and sludge water in the mixing tank 5 at a predetermined concentration. Is for. Detectors S1 and S2 for detecting the solid matter concentration and chromaticity are arranged in the mixing tank 5 and the line L6 for discharging the treated water, respectively, and the control unit 8 is connected to the detectors S1 and S2. The detected detection result is received, and the amount of sludge water supplied from the storage tank 4 to the mixing tank 5 is calculated based on the detection result. The control unit 8 transmits the calculation result to the water pump 7 and controls the water pump 7 (for example, the delivery pressure and delivery time of the water pump 7), so that a predetermined amount of sludge water is mixed from the storage tank 4. The separated water which is supplied to the tank 5 and has a predetermined solid concentration in the mixing tank 5 is generated.

より具体的には、使用者等による実験等に基づいて電解処理槽6で電解処理し得る分離水の固形物濃度(濃度閾値)が予め規定されており、制御部8は、検出器S1で検出される検出結果が予め規定された濃度閾値よりも低い場合に、貯留槽4から混合槽5へ所定量の汚泥水を供給することで、混合槽5、すなわち電解処理槽6で所定の固形物濃度(濃度閾値)を有する分離水が生成されることとなる。   More specifically, the solids concentration (concentration threshold) of the separated water that can be subjected to the electrolytic treatment in the electrolytic treatment tank 6 based on an experiment by a user or the like is defined in advance, and the control unit 8 is detected by the detector S1. When the detection result to be detected is lower than a predetermined concentration threshold value, a predetermined amount of sludge water is supplied from the storage tank 4 to the mixing tank 5, so that a predetermined solid in the mixing tank 5, that is, the electrolytic treatment tank 6. Separated water having a physical concentration (concentration threshold) is generated.

分離装置3によって排水から固形物が分離された分離水の固形物濃度は、原水槽2中の固形物量が変動した際に変動する可能性がある。しかしながら、本実施の形態1の排水処理装置1によれば、送水ポンプ7と混合槽5とラインL5と検出器S1と制御部8とからなる調整部により、貯留槽4に貯留された汚泥水に含まれる固形物を排水から固形物が分離された分離水に混合してその分離水の固形物濃度を調整し、固形物濃度が調整された分離水を連続的に電解処理槽6で電解処理することで、例えば原水槽2における排水中の固形物量が変動した場合であっても、電解処理で使用する分離水の固形物濃度を調整することができ、その電解処理槽6で安定的に有機物処理や色度低減を行うことができ、電解処理槽6で使用する電極6a、6b等の維持管理を簡素化することができる。また、分離水の固形物濃度を調整するに当たり、貯留槽4に貯留された汚泥水に含まれる固形物を分離水に混合することで、貯留槽4中の固形物を有効利用しながらその産廃処理量を効果的に低減することができる。   The solids concentration of the separated water from which the solids are separated from the wastewater by the separation device 3 may vary when the amount of solids in the raw water tank 2 varies. However, according to the waste water treatment apparatus 1 of the first embodiment, the sludge water stored in the storage tank 4 by the adjustment unit including the water pump 7, the mixing tank 5, the line L5, the detector S1, and the control unit 8. The solids contained in the water are mixed with the separated water from which the solids have been separated from the waste water, the solids concentration of the separated water is adjusted, and the separated water whose concentration is adjusted is continuously electrolyzed in the electrolytic treatment tank 6. By processing, for example, even if the amount of solids in the waste water in the raw water tank 2 fluctuates, the solids concentration of the separated water used in the electrolytic treatment can be adjusted, and the electrolytic treatment tank 6 is stable. In addition, organic matter treatment and chromaticity reduction can be performed, and maintenance of the electrodes 6a and 6b used in the electrolytic treatment tank 6 can be simplified. Moreover, when adjusting the solid concentration of the separated water, the solid waste contained in the sludge water stored in the storage tank 4 is mixed with the separated water, so that the solid waste in the storage tank 4 can be effectively used while the industrial waste is produced. The amount of processing can be effectively reduced.

また、本実施の形態1の排水処理装置1によれば、分離装置3によって排水から分離された分離水と貯留槽4に貯留された汚泥水とを混合槽5へ供給し、その混合槽5で予め所定の固形物濃度を有する分離水を生成することで、電解処理槽6における固形物濃度を適切に維持することができ、当該電解処理槽6で電解処理を継続的もしくは連続的に行うことができる。   Moreover, according to the waste water treatment apparatus 1 of the first embodiment, the separation water separated from the waste water by the separation apparatus 3 and the sludge water stored in the storage tank 4 are supplied to the mixing tank 5, and the mixing tank 5 By generating separation water having a predetermined solid concentration in advance, the solid concentration in the electrolytic treatment tank 6 can be appropriately maintained, and the electrolytic treatment is continuously or continuously performed in the electrolytic treatment tank 6. be able to.

[実施の形態2]
図2は、本発明による排水処理装置の実施の形態2の基本構成を示したものである。図2に示す実施の形態2の排水処理装置1Aは、上記する実施の形態1の排水処理装置1に対して混合槽を省略した点が相違しており、その他の構成は実施の形態1の排水処理装置1と同様である。したがって、実施の形態1の排水処理装置1と同様の構成について、同様の符号を付してその詳細な説明は省略する。
[Embodiment 2]
FIG. 2 shows a basic configuration of Embodiment 2 of the waste water treatment apparatus according to the present invention. The waste water treatment apparatus 1A of the second embodiment shown in FIG. 2 is different from the waste water treatment apparatus 1 of the first embodiment described above in that the mixing tank is omitted, and other configurations are the same as those of the first embodiment. The same as the waste water treatment apparatus 1. Therefore, about the structure similar to the waste water treatment equipment 1 of Embodiment 1, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

図示するように、本実施の形態2の排水処理装置1Aは、主に、原水槽2Aと、分離装置3Aと、貯留槽4Aと、電解処理槽6Aと、送水ポンプ(送出部)7Aと、制御部8Aと、を備えている。   As shown in the figure, the wastewater treatment apparatus 1A of the second embodiment is mainly composed of a raw water tank 2A, a separation apparatus 3A, a storage tank 4A, an electrolytic treatment tank 6A, a water pump (sending part) 7A, And a control unit 8A.

本実施の形態2の排水処理装置1Aでは、分離装置3Aによって排水から分離された固形物を含む汚泥水は、ラインL2Aを介して貯留槽4Aに供給され、分離装置3Aによって排水から分離された分離水は、ラインL3Aを介して電解処理槽6Aへ直接供給される。貯留槽4Aに貯留された汚泥水は、後述する制御部8Aによって駆動制御される送水ポンプ7AによりラインL4Aを介して電解処理槽6Aへ送出される。なお、貯留槽4Aに送水ポンプ7Aにより電解処理槽6Aへ送出されない汚泥水がある場合、その汚泥水は不図示のラインを介して産廃処理場等へ搬出されることとなる。   In the wastewater treatment apparatus 1A of the second embodiment, sludge water containing solids separated from the wastewater by the separation apparatus 3A is supplied to the storage tank 4A via the line L2A and separated from the wastewater by the separation apparatus 3A. The separated water is directly supplied to the electrolytic treatment tank 6A via the line L3A. The sludge water stored in the storage tank 4A is sent to the electrolytic treatment tank 6A via the line L4A by a water pump 7A driven and controlled by a control unit 8A described later. In addition, when there exists sludge water which is not sent to the electrolytic treatment tank 6A by the water pump 7A in the storage tank 4A, the sludge water will be carried out to an industrial waste treatment plant etc. via a line not shown.

電解処理槽6Aでは、ラインL3Aを介して分離装置3Aから供給される分離水とラインL4Aを介して貯留槽4Aから供給される汚泥水を混合して所定の固形物濃度の分離水を生成する。その際、電解処理槽6Aに配設された撹拌機5aAによって、分離水と汚泥水とを積極的に撹拌してもよい。このように所定の固形物濃度の分離水を生成した後、電解処理槽6Aでは、電極6aA、6bAに所定の電流で所定の時間だけ通電して固形物を含む分離水を電解処理する。そして、電解処理槽6Aで電解処理された処理水は、ラインL6Aを介して海洋や河川、下水道等に放流される。なお、電解処理槽6Aでの分離水の電解処理が終了し、処理水がラインL6Aを介して放流されると、再び分離装置3Aによって排水から分離された分離水がラインL3Aを介して電解処理槽6Aへ供給され、貯留槽4Aに貯留された汚泥水がラインL4Aを介して電解処理槽6Aへ送出され、電解処理槽6Aで所定の固形物濃度の分離水が生成されて電解処理が施される。   In the electrolytic treatment tank 6A, the separated water supplied from the separation device 3A via the line L3A and the sludge water supplied from the storage tank 4A via the line L4A are mixed to generate separated water having a predetermined solid concentration. . At that time, the separated water and the sludge water may be actively stirred by the stirrer 5aA disposed in the electrolytic treatment tank 6A. In this way, after the separated water having a predetermined solid concentration is generated, in the electrolytic treatment tank 6A, the electrodes 6aA and 6bA are energized with a predetermined current for a predetermined time to perform electrolytic treatment on the separated water containing the solid. Then, the treated water subjected to the electrolytic treatment in the electrolytic treatment tank 6A is discharged to the ocean, rivers, sewers and the like via the line L6A. When the electrolytic treatment of the separated water in the electrolytic treatment tank 6A is completed and the treated water is discharged via the line L6A, the separated water separated from the waste water by the separation device 3A is again electrolytically treated via the line L3A. The sludge water supplied to the tank 6A and stored in the storage tank 4A is sent to the electrolytic treatment tank 6A through the line L4A, and separated water having a predetermined solid concentration is generated in the electrolytic treatment tank 6A to perform the electrolytic treatment. Is done.

制御部8Aは、上記したように電解処理槽6Aにおける分離水の固形物濃度を所定の濃度に維持するためのものである。電解処理槽6A、処理水を放流するためのラインL6Aにはそれぞれ、固形物濃度や色度を検出するための検出器S1A、S2Aが配設され、制御部8Aは、各検出器S1A、S2Aで検出される検出結果を受信し、その検出結果に基づいて貯留槽4Aから電解処理槽6Aへ供給する汚泥水の量を演算する。制御部8Aは、その演算結果を送水ポンプ7Aに送信して当該送水ポンプ7A(例えば送水ポンプ7Aの送出圧や送出時間等)を制御することによって、所定量の汚泥水が貯留槽4Aから電解処理槽6Aへ供給され、当該電解処理槽6Aで所定の固形物濃度を有する分離水が生成されることとなる。   As described above, the control unit 8A is for maintaining the solid concentration of the separated water in the electrolytic treatment tank 6A at a predetermined concentration. The electrolytic treatment tank 6A and the line L6A for discharging treated water are provided with detectors S1A and S2A for detecting the solid concentration and chromaticity, respectively, and the control unit 8A is provided with each detector S1A and S2A. The amount of sludge water supplied from the storage tank 4A to the electrolytic treatment tank 6A is calculated based on the detection result. The control unit 8A transmits the calculation result to the water pump 7A and controls the water pump 7A (for example, the feed pressure and the feed time of the water pump 7A), whereby a predetermined amount of sludge water is electrolyzed from the storage tank 4A. Supplyed to the treatment tank 6A, separation water having a predetermined solid concentration is generated in the electrolytic treatment tank 6A.

このように、本実施の形態2の排水処理装置1Aによれば、送水ポンプ7Aと検出器S1Aと制御部8Aとからなる調整部により、貯留槽4Aに貯留された汚泥水に含まれる固形物を排水から固形物が分離された分離水に混合してその分離水の固形物濃度を調整し、固形物濃度が調整された分離水を電解処理槽6Aで電解処理することで、実施の形態1の排水処理装置1と同様、電解処理槽6Aで安定的に有機物処理や色度低減を行うことができ、電解処理槽6Aで使用する電極6aA、6bA等の維持管理を簡素化することができるとともに、固形物の産廃処理量を効果的に低減することができる。   Thus, according to the wastewater treatment apparatus 1A of the second embodiment, the solid matter contained in the sludge water stored in the storage tank 4A by the adjusting unit including the water pump 7A, the detector S1A, and the control unit 8A. Is mixed with the separated water from which the solid matter is separated from the waste water, the solid concentration of the separated water is adjusted, and the separated water having the adjusted solid concentration is subjected to electrolytic treatment in the electrolytic treatment tank 6A. Similarly to the waste water treatment apparatus 1 of FIG. 1, the organic treatment tank 6A can stably perform organic treatment and chromaticity reduction, and can simplify the maintenance and management of the electrodes 6aA, 6bA and the like used in the electrolytic treatment tank 6A. In addition, it is possible to effectively reduce the amount of industrial waste processing.

また、本実施の形態2の排水処理装置1Aによれば、分離装置3Aによって排水から分離された分離水と貯留槽4Aに貯留された汚泥水とを電解処理槽6Aへ直接供給し、電解処理槽6Aで分離水と汚泥水を混合して所定の固形物濃度を有する分離水を生成することで、当該排水処理装置1A全体を小型化かつ簡素化することができる。   Moreover, according to the waste water treatment apparatus 1A of the second embodiment, the separated water separated from the waste water by the separation apparatus 3A and the sludge water stored in the storage tank 4A are directly supplied to the electrolytic treatment tank 6A, and the electrolytic treatment is performed. By mixing the separated water and sludge water in the tank 6A to produce separated water having a predetermined solid concentration, the entire waste water treatment apparatus 1A can be reduced in size and simplified.

[実施の形態3]
図3は、本発明による排水処理装置の実施の形態3の基本構成を示したものであり、より実際の設備に即した実施の形態を示したものである。図3に示す実施の形態3の排水処理装置1Bは、上記する実施の形態2の排水処理装置1Aに対して主に貯留槽に貯留された汚泥水を更に脱水して利用する点が相違しており、その他の構成は実施の形態2の排水処理装置1Aと同様である。したがって、実施の形態2の排水処理装置1Aと同様の構成について、同様の符号を付してその詳細な説明は省略する。
[Embodiment 3]
FIG. 3 shows a basic configuration of the third embodiment of the waste water treatment apparatus according to the present invention, and shows an embodiment more suitable for actual facilities. The waste water treatment apparatus 1B of the third embodiment shown in FIG. 3 is different from the waste water treatment apparatus 1A of the second embodiment described above in that the sludge water stored mainly in the storage tank is further dehydrated and used. The other configuration is the same as that of the wastewater treatment apparatus 1A of the second embodiment. Therefore, about the structure similar to the waste water treatment equipment 1A of Embodiment 2, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

図示するように、本実施の形態3の排水処理装置1Bは、主に、原水槽2Bと、分離装置3Bと、貯留槽4Bと、電解処理槽6Bと、送水ポンプ(第1送出部)7Bと、制御部8Bと、を備えるとともに、脱水機9Bと、脱水ケーキ槽10Bと、搬送装置(第2送出部)11Bと、を備えている。   As shown in the figure, the waste water treatment apparatus 1B of the third embodiment is mainly composed of a raw water tank 2B, a separation apparatus 3B, a storage tank 4B, an electrolytic treatment tank 6B, and a water pump (first delivery unit) 7B. And a control unit 8B, a dehydrator 9B, a dewatering cake tank 10B, and a transport device (second delivery unit) 11B.

本実施の形態3の排水処理装置1Bでは、分離装置3Bは、生物処理槽3aBと加圧浮上槽3bBから構成されており、ラインL1Bを介して原水槽2Bから供給された排水は、生物処理槽3aBで生物処理(有機物やアンモニア態(アンモニア窒素系)を生物学的に分解処理)が施され、生物処理後の排水は、加圧浮上槽3bBで加圧浮上処理が施される。分離装置3Bによって排水から分離された汚泥水(相対的に大量の固形物を含む)は、ラインL2Bを介して貯留槽4Bに供給され、分離装置3Bによって排水から分離された分離水(相対的に少量の固形物を含む)は、ラインL3Bを介して電解処理槽6Bへ供給される。貯留槽4Bに貯留された汚泥水の一部は、後述する制御部8Bによって駆動制御される送水ポンプ7BによりラインL4Bを介して電解処理槽6Bへ送出される。また、貯留槽4Bに貯留された汚泥水の残部は、ラインL7Bを介して脱水機9Bへ供給される。   In the wastewater treatment apparatus 1B of the third embodiment, the separation apparatus 3B includes a biological treatment tank 3aB and a pressurized levitation tank 3bB, and the wastewater supplied from the raw water tank 2B via the line L1B is biological treatment. Biological treatment (organic matter or ammonia (ammonia nitrogen system) is biologically decomposed) is performed in the tank 3aB, and the wastewater after the biological treatment is subjected to a pressure levitation process in the pressure levitation tank 3bB. Sludge water (including a relatively large amount of solids) separated from the wastewater by the separation device 3B is supplied to the storage tank 4B via the line L2B, and separated water (relative to the wastewater by the separation device 3B). Is contained in the electrolytic treatment tank 6B via the line L3B. A portion of the sludge water stored in the storage tank 4B is sent to the electrolytic treatment tank 6B via the line L4B by a water pump 7B that is driven and controlled by a control unit 8B described later. Further, the remaining sludge water stored in the storage tank 4B is supplied to the dehydrator 9B via the line L7B.

脱水機9Bは、貯留槽4Bから供給された汚泥水を、水分と固形物(「脱水ケーキ」ともいう。)とに分離するためのものである。なお、その水分には少量の固形物が含まれていてもよい。脱水機9Bによって脱水分離された水分は、ラインL8Bを介して原水槽2Bに循環され、脱水機9Bによって脱水分離された固形物は、ラインL9Bを介して脱水ケーキ槽10Bへ搬送される。また、脱水ケーキ槽10Bに貯留された固形物の一部(固形物A)は、後述する制御部8Bによって駆動制御される搬送装置11BによりラインL11Bを介して電解処理槽6Bへ送出され、脱水ケーキ槽10Bに貯留された固形物の残部(固形物B)は、ラインL10Bを介して産廃処理場等へ搬出されることとなる。   The dehydrator 9B is for separating the sludge water supplied from the storage tank 4B into moisture and solids (also referred to as “dehydrated cake”). Note that the moisture may contain a small amount of solid matter. The water dehydrated and separated by the dehydrator 9B is circulated to the raw water tank 2B via the line L8B, and the solid matter dehydrated and separated by the dehydrator 9B is conveyed to the dehydrated cake tank 10B via the line L9B. Further, a part of the solid matter (solid matter A) stored in the dewatering cake tank 10B is sent to the electrolytic treatment tank 6B via the line L11B by the transfer device 11B driven and controlled by the control unit 8B described later, and dehydrated. The remainder (solid matter B) of the solid matter stored in the cake tank 10B will be carried out to the industrial waste treatment plant or the like via the line L10B.

電解処理槽6Bでは、ラインL3Bを介して分離装置3Bから供給される分離水とラインL4Bを介して貯留槽4Bから供給される汚泥水とラインL11Bを介して脱水ケーキ槽10Bから搬送される固形物(固形物A)を混合して所定の固形物濃度の分離水を生成する。その際、電解処理槽6Bに配設された撹拌機5aBによって、分離水と汚泥水と固形物とを積極的に撹拌することができる。このように所定の固形物濃度の分離水を生成した後、電解処理槽6Bでは、電極6aB、6bBに所定の電流で所定の時間だけ通電して固形物を含む分離水を電解処理する。そして、電解処理槽6Bで電解処理された処理水は、ラインL6Bを介して海洋や河川、下水道等に放流される。なお、電解処理槽6Bでの分離水の電解処理が終了し、処理水がラインL6Bを介して放流されると、再び分離装置3Bによって排水から分離された分離水がラインL3Bを介して電解処理槽6Bへ供給され、貯留槽4Bに貯留された汚泥水がラインL4Bを介して電解処理槽6Bへ送出され、脱水ケーキ槽10Bに貯留された固形物がラインL11Bを介して電解処理槽6Bへ送出され、電解処理槽6Bで所定の固形物濃度の分離水が生成されて電解処理が施される。   In the electrolytic treatment tank 6B, the separated water supplied from the separation device 3B via the line L3B, the sludge water supplied from the storage tank 4B via the line L4B, and the solid conveyed from the dehydrated cake tank 10B via the line L11B. A product (solid A) is mixed to produce separated water having a predetermined solid concentration. In that case, separation water, sludge water, and a solid substance can be stirred positively by the stirrer 5aB arrange | positioned in the electrolytic treatment tank 6B. Thus, after producing | generating the separation water of a predetermined | prescribed solid substance density | concentration, in the electrolytic treatment tank 6B, it supplies with electricity to electrode 6aB and 6bB only for a predetermined time with a predetermined | prescribed electric current, and performs the electrolytic treatment of the separated water containing a solid substance. Then, the treated water subjected to the electrolytic treatment in the electrolytic treatment tank 6B is discharged to the ocean, rivers, sewers and the like via the line L6B. When the electrolytic treatment of the separated water in the electrolytic treatment tank 6B is completed and the treated water is discharged through the line L6B, the separated water separated from the waste water again by the separation device 3B is electrolytically treated through the line L3B. The sludge water supplied to the tank 6B and stored in the storage tank 4B is sent to the electrolytic treatment tank 6B via the line L4B, and the solid matter stored in the dewatered cake tank 10B is sent to the electrolytic treatment tank 6B via the line L11B. Then, separated water having a predetermined solid concentration is generated in the electrolytic treatment tank 6B and subjected to electrolytic treatment.

制御部8Bは、上記したように電解処理槽6Bにおける分離水の固形物濃度を所定の濃度に維持するためのものである。電解処理槽6B、処理水を放流するためのラインL6B、分離装置3Bと電解処理槽6Bを繋ぐラインL3B、貯留槽4Bにはそれぞれ、固形物濃度や色度を検出するための検出器S1B〜S4Bが配設され、制御部8Bは、各検出器S1B〜S4Bで検出される検出結果を受信し、その検出結果に基づいて貯留槽4Bから電解処理槽6Bへ供給する汚泥水の量や脱水ケーキ槽10Bから電解処理槽6Bへ搬送する固形物の量を演算する。制御部8Bは、その演算結果を送水ポンプ7Bや搬送装置11Bに送信し、当該送水ポンプ7B(例えば送水ポンプ7Bの送出圧や送出時間等)や搬送装置11B(例えば搬送装置11Bの搬送容量や搬送時間等)を制御することによって、所定量の汚泥水が貯留槽4Bから電解処理槽6Bへ供給されるとともに所定量の固形物が脱水ケーキ槽10Bから電解処理槽6Bへ供給され、当該電解処理槽6Bで所定の固形物濃度を有する分離水が生成されることとなる。   As described above, the control unit 8B is for maintaining the solid concentration of the separated water in the electrolytic treatment tank 6B at a predetermined concentration. Electrolytic treatment tank 6B, line L6B for discharging treated water, line L3B connecting separation device 3B and electrolytic treatment tank 6B, and storage tank 4B, detectors S1B to detect solid matter concentration and chromaticity, respectively. S4B is arranged, and the control unit 8B receives the detection results detected by the detectors S1B to S4B, and based on the detection results, the amount of sludge water supplied from the storage tank 4B to the electrolytic treatment tank 6B and dehydration The amount of solids conveyed from the cake tank 10B to the electrolytic treatment tank 6B is calculated. The control unit 8B transmits the calculation result to the water pump 7B and the transport device 11B, and the water pump 7B (for example, the delivery pressure and the delivery time of the water pump 7B) and the transport device 11B (for example, the transport capacity of the transport device 11B) By controlling the transport time, etc., a predetermined amount of sludge water is supplied from the storage tank 4B to the electrolytic treatment tank 6B, and a predetermined amount of solid matter is supplied from the dehydrated cake tank 10B to the electrolytic treatment tank 6B. Separation water having a predetermined solid matter concentration is generated in the treatment tank 6B.

このように、本実施の形態3の排水処理装置1Bによれば、貯留槽4Bに貯留された汚泥水に含まれる固形物と貯留槽4Bに貯留された汚泥水の一部を脱水して生成した固形物とを排水から固形物が分離された分離水に混合してその分離水の固形物濃度を調整し、固形物濃度が調整された分離水を電解処理槽6Bで電解処理することで、実施の形態2の排水処理装置1Aと同様、電解処理槽6Bで安定的に有機物処理や色度低減を行うことができ、電解処理槽6Bで使用する電極6aB、6bB等の維持管理を簡素化することができるとともに、固形物の産廃処理量(固形物Bの量)を効果的に低減することができる。   Thus, according to the waste water treatment apparatus 1B of the third embodiment, the solid matter contained in the sludge water stored in the storage tank 4B and a part of the sludge water stored in the storage tank 4B are dehydrated and generated. By mixing the separated solids with the separated water from which the solids are separated from the waste water, adjusting the solid concentration of the separated water, and subjecting the separated water with the adjusted solid concentration to electrolytic treatment in the electrolytic treatment tank 6B. As with the wastewater treatment apparatus 1A of the second embodiment, the organic treatment tank 6B can stably perform organic treatment and chromaticity reduction, and the maintenance and management of the electrodes 6aB and 6bB used in the electrolytic treatment tank 6B are simplified. In addition, it is possible to effectively reduce the amount of solid waste produced (the amount of solid B).

また、本実施の形態3の排水処理装置1Bによれば、電解処理槽6Bでの電解処理に用いる分離水の固形物濃度を調整する際に、貯留槽4Bに貯留された汚泥水の一部を脱水して生成した固形物を利用することで、固形物の産廃処理量(固形物Bの量)をより効果的に低減することができる。   Moreover, according to the waste water treatment apparatus 1B of the third embodiment, when adjusting the solid concentration of the separated water used for the electrolytic treatment in the electrolytic treatment tank 6B, a part of the sludge water stored in the storage tank 4B. By utilizing the solid matter produced by dehydrating the solid, it is possible to more effectively reduce the solid waste processing amount (the amount of the solid matter B).

[実施の形態4]
図4は、本発明による排水処理装置の実施の形態4の基本構成を示したものである。図4に示す実施の形態4の排水処理装置1Cは、上記する実施の形態3の排水処理装置1Bに対して主に貯留槽に貯留された汚泥水の一部を脱水して生成した水分を電解処理する点が相違しており、その他の構成は実施の形態3の排水処理装置1Bと同様である。したがって、実施の形態3の排水処理装置1Bと同様の構成について、同様の符号を付してその詳細な説明は省略する。
[Embodiment 4]
FIG. 4 shows a basic configuration of Embodiment 4 of the waste water treatment apparatus according to the present invention. The wastewater treatment apparatus 1C of the fourth embodiment shown in FIG. 4 dehydrates a part of the sludge water stored mainly in the storage tank with respect to the wastewater treatment apparatus 1B of the third embodiment described above. The point which electrolyzes is different, and the other structure is the same as that of the waste water treatment apparatus 1B of Embodiment 3. Therefore, about the structure similar to the waste water treatment equipment 1B of Embodiment 3, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

図示するように、本実施の形態4の排水処理装置1Cは、主に、原水槽2Cと、分離装置3Cと、貯留槽4Cと、電解処理槽6Cと、送水ポンプ(第1送出部)7Cと、制御部8Cと、を備えるとともに、脱水機9Cと、脱水ケーキ槽10Cと、搬送装置(第2送出部)11Cと、処理槽12Cと、を備えている。   As shown in the figure, the wastewater treatment apparatus 1C of the fourth embodiment is mainly composed of a raw water tank 2C, a separation device 3C, a storage tank 4C, an electrolytic treatment tank 6C, and a water pump (first delivery unit) 7C. And a control unit 8C, a dehydrator 9C, a dewatering cake tank 10C, a transfer device (second delivery unit) 11C, and a processing tank 12C.

本実施の形態4の排水処理装置1Cでは、ラインL1Cを介して原水槽2Cから分離装置3Cへ供給された排水は、生物処理槽3aCで生物処理(有機物やアンモニア態(アンモニア窒素系)を生物学的に分解処理)が施され、生物処理後の排水は、加圧浮上槽3bCで加圧浮上処理が施される。分離装置3Cによって排水から分離された汚泥水(相対的に大量の固形物を含む)は、ラインL2Cを介して貯留槽4Cに供給され、分離装置3Cによって排水から分離された分離水(相対的に少量の固形物を含む)は、ラインL3Cを介して後述する処理槽12Cへ供給される。貯留槽4Cに貯留された汚泥水の一部は、後述する制御部8Cによって駆動制御される送水ポンプ7CによりラインL4Cを介して電解処理槽6Cへ送出される。また、貯留槽4Cに貯留された汚泥水の残部は、ラインL7Cを介して脱水機9Cへ供給される。   In the wastewater treatment apparatus 1C of the fourth embodiment, wastewater supplied from the raw water tank 2C to the separation apparatus 3C via the line L1C is biologically treated (organic matter or ammonia (ammonia nitrogen system)) in the biological treatment tank 3aC. The biologically treated waste water is subjected to a pressure levitation treatment in the pressure levitation tank 3bC. The sludge water (including a relatively large amount of solids) separated from the wastewater by the separation device 3C is supplied to the storage tank 4C via the line L2C and separated from the wastewater by the separation device 3C (relative Is contained in a treatment tank 12C, which will be described later, via a line L3C. Part of the sludge water stored in the storage tank 4C is sent to the electrolytic treatment tank 6C via the line L4C by a water pump 7C that is driven and controlled by a control unit 8C described later. Further, the remaining sludge water stored in the storage tank 4C is supplied to the dehydrator 9C via the line L7C.

そして、脱水機9Cによって脱水分離された水分は、ラインL8Cを介して電解処理槽6Cに供給され、脱水機9Cによって脱水分離された固形物(「脱水ケーキ」ともいう。)は、ラインL9Cを介して脱水ケーキ槽10Cへ搬送される。また、脱水ケーキ槽10Cに貯留された固形物の一部(固形物A)は、後述する制御部8Cによって駆動制御される搬送装置11CによりラインL11Cを介して電解処理槽6Cへ送出され、脱水ケーキ槽10Cに貯留された固形物の残部(固形物B)は、ラインL10Cを介して産廃処理場等へ搬出されることとなる。   The water dehydrated and separated by the dehydrator 9C is supplied to the electrolytic treatment tank 6C via the line L8C, and the solid matter (also referred to as “dehydrated cake”) dehydrated and separated by the dehydrator 9C is supplied to the line L9C. To the dehydrated cake tank 10C. Further, a part of the solid matter (solid matter A) stored in the dewatering cake tank 10C is sent to the electrolytic treatment tank 6C via the line L11C by the transfer device 11C that is driven and controlled by the control unit 8C to be described later. The remainder of the solid matter (solid matter B) stored in the cake tank 10C will be carried out to the industrial waste treatment plant or the like via the line L10C.

電解処理槽6Cでは、ラインL8Cを介して脱水機9Cから供給される水分とラインL4Cを介して貯留槽4Cから供給される汚泥水とラインL11Cを介して脱水ケーキ槽10Cから搬送される固形物(固形物A)を混合して所定の固形物濃度の分離水を生成する。その際、電解処理槽6Cに配設された撹拌機5aCによって、水分と汚泥水と固形物とを積極的に撹拌することができる。このように所定の固形物濃度の水分(分離水)を生成した後、電解処理槽6Cでは、電極6aC、6bCに所定の電流で所定の時間だけ通電して固形物を含む水分を電解処理する。そして、電解処理槽6Cで電解処理された処理水は、ライン(循環ライン)L6Cを介してその一部が原水槽2Cを循環されるとともに、その一部が処理槽12Cへ供給される。なお、電解処理槽6Cでの水分の電解処理が終了し、処理水がラインL6Cを介して送出されると、再び貯留槽4Cに貯留された汚泥水がラインL4Cを介して電解処理槽6Cへ送出され、脱水機9Cによって分離された水分がラインL8Cを介して電解処理槽6Cへ供給され、脱水ケーキ槽10Cに貯留された固形物がラインL11Cを介して電解処理槽6Cへ送出され、電解処理槽6Cで所定の固形物濃度の水分が生成されて電解処理が施される。   In the electrolytic treatment tank 6C, the moisture supplied from the dehydrator 9C through the line L8C, the sludge water supplied from the storage tank 4C through the line L4C, and the solid material conveyed from the dewatered cake tank 10C through the line L11C. (Solid A) is mixed to produce separated water having a predetermined solid concentration. At that time, the water, the sludge water, and the solid can be actively stirred by the stirrer 5aC disposed in the electrolytic treatment tank 6C. After the moisture (separated water) having a predetermined solid concentration is generated in this way, in the electrolytic treatment tank 6C, the electrodes 6aC and 6bC are energized for a predetermined time with a predetermined current to electrolyze the moisture containing the solid. . A part of the treated water subjected to the electrolytic treatment in the electrolytic treatment tank 6C is circulated through the raw water tank 2C via a line (circulation line) L6C, and a part thereof is supplied to the treatment tank 12C. In addition, when the electrolysis process of the water | moisture content in the electrolytic treatment tank 6C is complete | finished and treated water is sent out via the line L6C, the sludge water stored again in the storage tank 4C will return to the electrolytic treatment tank 6C via the line L4C. The water that has been sent and separated by the dehydrator 9C is supplied to the electrolytic treatment tank 6C via the line L8C, and the solid matter stored in the dehydrated cake tank 10C is sent to the electrolytic treatment tank 6C via the line L11C, and electrolysis is performed. Water of a predetermined solid concentration is generated in the treatment tank 6C and subjected to electrolytic treatment.

処理槽12Cは、ラインL3Cを介して分離装置3Cから供給される分離水とラインL6Cを介して電解処理槽6Cから供給される処理水とに次亜塩素酸を添加して脱色減菌処理を行うものであり、当該処理槽12Cで脱色減菌処理された処理水は、ラインL12Cを介して海洋や河川、下水道等に放流される。   The treatment tank 12C performs a decolorization sterilization treatment by adding hypochlorous acid to the separation water supplied from the separation device 3C via the line L3C and the treatment water supplied from the electrolytic treatment tank 6C via the line L6C. The treated water that has been decolorized and sterilized in the treatment tank 12C is discharged to the ocean, rivers, sewers, etc. via the line L12C.

制御部8Cは、上記したように電解処理槽6Cにおける分離水の固形物濃度を所定の濃度に維持するためのものである。電解処理槽6C、処理水を放流するためのラインL12C、分離装置3Cと処理槽12Cを繋ぐラインL3C、貯留槽4Cにはそれぞれ、固形物濃度や色度を検出するための検出器S1C〜S4Cが配設され、制御部8Cは、各検出器S1C〜S4Cで検出される検出結果を受信し、その検出結果に基づいて貯留槽4Cから電解処理槽6Cへ供給する汚泥水の量や脱水ケーキ槽10Cから電解処理槽6Cへ搬送する固形物の量を演算する。制御部8Cは、その演算結果を送水ポンプ7Cや搬送装置11Cに送信し、当該送水ポンプ7C(例えば送水ポンプ7Cの送出圧や送出時間等)や搬送装置11C(例えば搬送装置11Cの搬送容量や搬送時間等)を制御することによって、所定量の汚泥水が貯留槽4Cから電解処理槽6Cへ供給されるとともに所定量の固形物が脱水ケーキ槽10Cから電解処理槽6Cへ供給され、当該電解処理槽6Cで所定の固形物濃度を有する分離水が生成されることとなる。   As described above, the control unit 8C is for maintaining the solid concentration of the separated water in the electrolytic treatment tank 6C at a predetermined concentration. Electrolytic treatment tank 6C, line L12C for discharging treated water, line L3C connecting separation device 3C and treatment tank 12C, and storage tank 4C have detectors S1C to S4C for detecting solid concentration and chromaticity, respectively. The control unit 8C receives the detection results detected by the detectors S1C to S4C, and based on the detection results, the amount of sludge water supplied from the storage tank 4C to the electrolytic treatment tank 6C and the dehydrated cake The amount of the solid material conveyed from the tank 10C to the electrolytic treatment tank 6C is calculated. The control unit 8C transmits the calculation result to the water pump 7C and the transport device 11C, and the water pump 7C (for example, the feed pressure and the delivery time of the water pump 7C) and the transport device 11C (for example, the transport capacity of the transport device 11C and the like) By controlling the transport time, etc., a predetermined amount of sludge water is supplied from the storage tank 4C to the electrolytic treatment tank 6C and a predetermined amount of solid matter is supplied from the dehydrated cake tank 10C to the electrolytic treatment tank 6C. Separation water having a predetermined solid matter concentration is generated in the treatment tank 6C.

このように、本実施の形態4の排水処理装置1Cによれば、貯留槽4Cに貯留された汚泥水に含まれる固形物と貯留槽4Cに貯留された汚泥水の一部を脱水して生成した固形物とを汚泥水の一部を脱水して生成した水分(分離水)に混合してその水分の固形物濃度を調整し、固形物濃度が調整された水分を電解処理槽6Cで電解処理することで、実施の形態3の排水処理装置1Bと同様、電解処理槽6Cで安定的に有機物処理や色度低減を行うことができ、電解処理槽6Cで使用する電極6aC、6bC等の維持管理を簡素化することができるとともに、固形物の産廃処理量(固形物Bの量)を効果的に低減することができる。   Thus, according to the waste water treatment apparatus 1C of the fourth embodiment, the solid matter contained in the sludge water stored in the storage tank 4C and the part of the sludge water stored in the storage tank 4C are dehydrated and generated. The solids thus obtained are mixed with the water (separated water) generated by dehydrating part of the sludge water, the solids concentration of the water is adjusted, and the water with the adjusted solids concentration is electrolyzed in the electrolytic treatment tank 6C. By processing, like the waste water treatment apparatus 1B of Embodiment 3, the organic treatment and chromaticity reduction can be stably performed in the electrolytic treatment tank 6C, and the electrodes 6aC and 6bC used in the electrolytic treatment tank 6C Maintenance and management can be simplified, and the solid waste processing amount (solid B amount) can be effectively reduced.

なお、上記した実施の形態3、4の排水処理装置1B、1Cでは、貯留槽と電解処理槽を繋ぐラインや脱水ケーキ槽と電解処理槽を繋ぐラインにそれぞれ送水ポンプや搬送装置を配設し、制御部によって送水ポンプと搬送装置の双方を駆動制御して電解処理槽における固形物濃度を調整する形態について説明したが、例えば、送水ポンプと搬送装置の一方のみを用いてもよいし、制御部によって送水ポンプと搬送装置の一方のみを駆動制御してもよい。   In the waste water treatment apparatuses 1B and 1C of the above-described third and fourth embodiments, a water pump and a transport device are provided on the line connecting the storage tank and the electrolytic treatment tank and the line connecting the dewatering cake tank and the electrolytic treatment tank, respectively. The embodiment has been described in which the control unit drives and controls both the water pump and the transport device to adjust the solid concentration in the electrolytic treatment tank. For example, only one of the water pump and the transport device may be used or controlled. Only one of the water pump and the conveying device may be driven and controlled by the unit.

また、上記した実施の形態3、4の排水処理装置1B、1Cでは、電解処理槽での固形物濃度や色度等を精緻に制御するために、分離装置3Bと電解処理槽6Bを繋ぐラインL3Bや貯留槽4Bに検出器S3B、S4Bを配設したり、分離装置3Cと処理槽12Cを繋ぐラインL3Cや貯留槽4Cに検出器S3C、S4Cを配設する形態について説明した。一方で、電解処理槽6B、6Cにおける固形物濃度や色度は検出器S1B、S1Cにより検出し得ることから、排水処理装置1B、1Cの構成を簡素化するために、上記した検出器S3B、S4Bや検出器S3C、S4Cは省略してもよい。   Moreover, in the waste water treatment apparatuses 1B and 1C of Embodiments 3 and 4 described above, a line connecting the separation apparatus 3B and the electrolytic treatment tank 6B in order to precisely control the solid matter concentration and chromaticity in the electrolytic treatment tank. The description has been given of the configuration in which the detectors S3B and S4B are disposed in the L3B and the storage tank 4B, and the detectors S3C and S4C are disposed in the line L3C and the storage tank 4C that connect the separation device 3C and the processing tank 12C. On the other hand, since the solid matter concentration and chromaticity in the electrolytic treatment tanks 6B and 6C can be detected by the detectors S1B and S1C, in order to simplify the configuration of the wastewater treatment apparatuses 1B and 1C, the above-described detectors S3B, S4B and detectors S3C and S4C may be omitted.

<実施例による検査用試料のCODの減少率と色度を測定した実験とその結果>
本発明者等は、固形物量(固形物濃度、特にCOD濃度)が変動した場合であっても、次亜塩素酸等を生成し得る電極を用いた電解処理では排水中の固形物(特にCOD成分)を十分に酸化分解し得ることを確認するために、固形物量が異なる複数の検査用試料(実施例1〜3、比較例)を調製し、それぞれの検査用試料に対してCODの減少率測定と色度測定を実施した。
<Experiment and Results of Measuring COD Reduction Rate and Chromaticity of Test Samples According to Examples>
Even when the amount of solids (solid matter concentration, particularly COD concentration) fluctuates, the present inventors have conducted solid treatment in wastewater (especially COD) in electrolytic treatment using an electrode capable of generating hypochlorous acid or the like. In order to confirm that the component) can be sufficiently oxidatively decomposed, a plurality of test samples (Examples 1 to 3 and comparative examples) having different solid amounts are prepared, and the COD is reduced for each test sample. Rate measurements and chromaticity measurements were performed.

<検査用試料の調製方法>
まず、検査用試料の調製方法を概説すると、ある固形物濃度を有する懸濁状態の排水(以下、原水という)を500ml用意し、その原水を5分間静置した後の上澄み液を200ml採取して比較例による検査用試料を調製した。また、原水を500ml用意し、その原水のうち200mlを採取して実施例1による検査用試料を調製した。また、原水を1100ml用意し、その原水を5分間静置した後の上澄み液900mlを沈殿物が浮遊しないように取り除いて実施例2による検査用試料を調製した。また、原水を2600ml用意し、その原水を5分間静置した後の上澄み液2400mlを沈殿物が浮遊しないように取り除いて実施例3による検査用試料を調製した。
<Method for preparing test sample>
First, an outline of the method for preparing the test sample is as follows: 500 ml of suspended waste water (hereinafter referred to as raw water) having a certain solid concentration is prepared, and 200 ml of the supernatant is collected after the raw water is allowed to stand for 5 minutes. A test sample according to a comparative example was prepared. In addition, 500 ml of raw water was prepared, and 200 ml of the raw water was collected to prepare a test sample according to Example 1. In addition, 1100 ml of raw water was prepared, and after 900 ml of the raw water had been allowed to stand for 5 minutes, 900 ml of the supernatant was removed so that the precipitate did not float, thereby preparing a test sample according to Example 2. In addition, 2600 ml of raw water was prepared, and 2400 ml of the supernatant after removing the raw water for 5 minutes was removed so as not to float the precipitate, thereby preparing a test sample according to Example 3.

<COD成分の減少率と色度の測定方法>
次に、固形物由来のCODの減少率の測定方法を概説すると、電解処理前に各検査用試料の溶存COD(P1とする)と全量COD(P2とする)を測定し、各検査用試料に対して1Aの電流で5分間通電して電解処理を行った後、各検査用試料の溶存COD(R1とする)と全量COD(R2とする)を再び測定し、以下の式(4)に基づいて固形物由来のCODの減少率を算出した。なお、溶存CODとは、各検査用試料の溶液中に溶存しているCOD成分の濃度、全量CODとは、各検査用試料の溶液中に溶存しているCOD成分と固形物由来のCOD成分の総和の濃度である。
<Measurement method of COD component reduction rate and chromaticity>
Next, the outline of the method for measuring the COD reduction rate derived from solid matter is as follows. Before the electrolytic treatment, the dissolved COD (referred to as P1) and the total amount of COD (referred to as P2) are measured. After conducting the electrolytic treatment with a current of 1A for 5 minutes, the dissolved COD (referred to as R1) and the total amount COD (referred to as R2) of each test sample were measured again, and the following formula (4) Based on the above, the reduction rate of COD derived from solid matter was calculated. The dissolved COD is the concentration of the COD component dissolved in the solution of each test sample, and the total amount COD is the COD component dissolved in the solution of each test sample and the COD component derived from the solid matter. Is the concentration of the sum of

[数1]
1−(R2−R1)/(P2−P1) ・・・(4)
[Equation 1]
1- (R2-R1) / (P2-P1) (4)

また、各検査用試料の色度は、ポータブル水質計WA1(日本電色工業株式会社製)を使用して測定した。   The chromaticity of each test sample was measured using a portable water quality meter WA1 (manufactured by Nippon Denshoku Industries Co., Ltd.).

<検査用試料のCODの減少率と色度を測定した実験結果>
図5は、実施例1〜3、比較例による検査用試料の電解処理前および電解処理後の溶存CODと全量COD(特にCODcr(二クロム酸カリウムによる化学的酸素要求量))を示したものである。また、以下の表1は、実施例1〜3、比較例による検査用試料のCODの減少率を示したものである。また、図6は、実施例1〜3、比較例による検査用試料の電解処理前および電解処理後の色度を示したものである。なお、図5、表1および図6では、各検査用試料の固形物量を、実施例1による検査用試料の固形物量に対する割合で示している。
<Experimental result of measuring COD reduction rate and chromaticity of test sample>
FIG. 5 shows dissolved COD and total COD (especially CODcr (chemical oxygen demand by potassium dichromate)) before and after electrolytic treatment of test samples according to Examples 1 to 3 and Comparative Example. It is. Table 1 below shows the COD reduction rate of the test samples according to Examples 1 to 3 and the comparative example. FIG. 6 shows the chromaticity before and after the electrolytic treatment of the test samples according to Examples 1 to 3 and the comparative example. In FIG. 5, Table 1 and FIG. 6, the solid amount of each test sample is shown as a ratio to the solid amount of the test sample according to Example 1.

Figure 2015080734
Figure 2015080734

図5および表1で示すように、電解処理で使用する溶液にある程度の固形物(COD成分)が含まれていたとしても、電解処理層での電解処理により固形物由来のCODを十分に低減できることが確認された。また、図6で示すように、電解処理で使用する溶液にある程度の固形物が含まれていたとしても、電解処理槽での電解処理により色度を上澄み液(比較例)と同等に低減し得ることが確認された。   As shown in FIG. 5 and Table 1, even when a certain amount of solids (COD components) are contained in the solution used in the electrolytic treatment, the solid-derived COD is sufficiently reduced by the electrolytic treatment in the electrolytic treatment layer. It was confirmed that it was possible. In addition, as shown in FIG. 6, even if the solution used in the electrolytic treatment contains a certain amount of solid matter, the chromaticity is reduced to the same level as the supernatant liquid (comparative example) by the electrolytic treatment in the electrolytic treatment tank. Confirmed to get.

この実験結果より、電解処理槽における固形物量(固形物濃度、特にCOD濃度)が増加した場合であっても、次亜塩素酸等を生成し得る電極を用いた電解処理により、電極等の劣化を抑制しながら排水に含まれる固形物を十分に酸化分解し得ることが実証された。   From this experimental result, even when the amount of solids in the electrolytic treatment tank (solids concentration, especially COD concentration) is increased, degradation of the electrodes and the like due to the electrolytic treatment using electrodes capable of generating hypochlorous acid, etc. It was proved that the solid matter contained in the waste water can be sufficiently oxidatively decomposed while suppressing the above.

1、1A、1B、1C…排水処理装置
2、2A、2B、2C…原水槽
3、3A、3B、3C…分離装置
4、4A、4B、4C…貯留槽
5…混合槽
6、6A、6B、6C…電解処理槽
7、7A、7B、7C…送水ポンプ(送出部、第1送出部)
8、8A、8B、8C…制御部
9B、9C…脱水機
10B、10C…脱水ケーキ槽
11B、11C…搬送装置(第2送出部)
12C…処理槽
S1、S2、S1A、S2A、S1B〜S4B、S1C〜S4C…検出器
DESCRIPTION OF SYMBOLS 1, 1A, 1B, 1C ... Waste water treatment equipment 2, 2A, 2B, 2C ... Raw water tank 3, 3A, 3B, 3C ... Separation apparatus 4, 4A, 4B, 4C ... Storage tank 5 ... Mixing tank 6, 6A, 6B , 6C ... Electrolytic treatment tanks 7, 7A, 7B, 7C ... Water pump (sending part, first sending part)
8, 8A, 8B, 8C ... Control units 9B, 9C ... Dehydrators 10B, 10C ... Dehydrated cake tanks 11B, 11C ... Conveying device (second delivery unit)
12C ... Processing tanks S1, S2, S1A, S2A, S1B to S4B, S1C to S4C ... Detector

Claims (15)

固形物を含む排水を電解処理する排水処理装置であって、
前記排水から分離された固形物を含む汚泥水を貯留する貯留槽と、
前記貯留槽に貯留された汚泥水に含まれる固形物を前記排水から固形物が分離された分離水に混合して前記分離水の固形物濃度を調整する調整部と、
前記調整部によって固形物濃度が調整された分離水を電解処理する電解処理槽と、を備える排水処理装置。
A wastewater treatment apparatus for electrolytically treating wastewater containing solid matter,
A storage tank for storing sludge water containing solid matter separated from the waste water;
An adjusting unit that adjusts the solids concentration of the separated water by mixing solids contained in the sludge water stored in the storage tank with the separated water from which the solids are separated from the waste water;
A wastewater treatment apparatus comprising: an electrolytic treatment tank for electrolytically treating separated water whose solid concentration is adjusted by the adjustment unit.
前記調整部は、前記貯留槽に貯留された汚泥水を送出する送出部と、前記送出部によって送出された汚泥水と前記分離水を混合する混合槽と、前記混合槽で混合されて生成された固形物を含む分離水を前記電解処理槽に供給する供給ラインと、前記混合槽における固形物濃度を検出する検出器と、前記検出器による検出結果に基づいて前記送出部により送出される汚泥水の量を制御する制御部と、を有する、請求項1に記載の排水処理装置。   The adjusting unit is generated by being mixed in the mixing tank, a sending part for sending the sludge water stored in the storage tank, a mixing tank for mixing the sludge water sent by the sending part and the separated water, and the mixing tank. Supply line for supplying separated water containing solid matter to the electrolytic treatment tank, a detector for detecting the solid concentration in the mixing tank, and sludge sent out by the sending unit based on the detection result by the detector The waste water treatment apparatus according to claim 1, further comprising a control unit that controls an amount of water. 前記混合槽には攪拌機が配設されている、請求項2に記載の排水処理装置。   The waste water treatment apparatus according to claim 2, wherein a stirrer is disposed in the mixing tank. 前記調整部は、前記貯留槽に貯留された汚泥水を前記電解処理槽に送出する送出部と、前記電解処理槽における固形物濃度を検出する検出器と、前記検出器による検出結果に基づいて前記送出部により送出される汚泥水の量を制御する制御部と、を有する、請求項1に記載の排水処理装置。   The adjustment unit is based on a delivery unit that sends the sludge water stored in the storage tank to the electrolytic treatment tank, a detector that detects a solid concentration in the electrolytic treatment tank, and a detection result by the detector. The waste water treatment apparatus according to claim 1, further comprising: a control unit that controls an amount of sludge water delivered by the delivery unit. 前記電解処理槽には攪拌機が配設されている、請求項4に記載の排水処理装置。   The wastewater treatment apparatus according to claim 4, wherein a stirrer is disposed in the electrolytic treatment tank. 前記排水処理装置は、前記貯留槽に貯留された汚泥水から水分を脱水する脱水機と、前記脱水機により前記汚泥水から水分が脱水されて生成された固形物を貯留する脱水ケーキ槽と、を更に有し、
前記調整部は、前記貯留槽に貯留された汚泥水を前記電解処理槽に送出する第1送出部と、前記脱水ケーキ槽に貯留された固形物を前記電解処理槽に送出する第2送出部と、前記電解処理槽における固形物濃度を検出する検出器と、前記検出器による検出結果に基づいて前記第1送出部により送出される汚泥水の量及び/又は前記第2送出部により送出される固形物の量を制御する制御部と、を有する、請求項1に記載の排水処理装置。
The wastewater treatment device includes a dehydrator that dehydrates water from the sludge water stored in the storage tank, and a dewatered cake tank that stores solid matter generated by dehydrating the water from the sludge water. Further comprising
The adjustment unit includes a first sending unit that sends sludge water stored in the storage tank to the electrolytic treatment tank, and a second sending unit that sends solid matter stored in the dewatered cake tank to the electrolytic treatment tank. And a detector for detecting a solid concentration in the electrolytic treatment tank, and an amount of sludge water sent out by the first sending unit and / or sent by the second sending unit based on a detection result by the detector. The waste water treatment apparatus of Claim 1 which has a control part which controls the quantity of the solid substance to obtain.
前記排水処理装置は、前記貯留槽に貯留された汚泥水から水分を脱水する脱水機と、前記脱水機により前記汚泥水から水分が脱水されて生成された固形物を貯留する脱水ケーキ槽と、を更に有し、前記電解処理槽は、前記脱水機により汚泥水から分離された水分を電解処理するようになっており、
前記調整部は、前記貯留槽に貯留された汚泥水を前記電解処理槽に送出する第1送出部と、前記脱水ケーキ槽に貯留された固形物を前記電解処理槽に送出する第2送出部と、前記電解処理槽における固形物濃度を検出する検出器と、前記検出器による検出結果に基づいて前記第1送出部により送出される汚泥水の量及び/又は前記第2送出部により送出される固形物の量を制御する制御部と、を有する、請求項1に記載の排水処理装置。
The wastewater treatment device includes a dehydrator that dehydrates water from the sludge water stored in the storage tank, and a dewatered cake tank that stores solid matter generated by dehydrating the water from the sludge water. The electrolytic treatment tank is adapted to electrolyze moisture separated from sludge water by the dehydrator,
The adjustment unit includes a first sending unit that sends sludge water stored in the storage tank to the electrolytic treatment tank, and a second sending unit that sends solid matter stored in the dewatered cake tank to the electrolytic treatment tank. And a detector for detecting a solid concentration in the electrolytic treatment tank, and an amount of sludge water sent out by the first sending unit and / or sent by the second sending unit based on a detection result by the detector. The waste water treatment apparatus of Claim 1 which has a control part which controls the quantity of the solid substance to obtain.
前記排水処理装置は、前記電解処理槽で電解処理された処理水を前記排水に循環する循環ラインを有する、請求項7に記載の排水処理装置。   The wastewater treatment apparatus according to claim 7, wherein the wastewater treatment apparatus has a circulation line that circulates the treated water electrolyzed in the electrolytic treatment tank to the wastewater. 前記排水処理装置は、前記電解処理槽で電解処理された処理水と前記分離水と次亜塩素酸とを用いて脱色減菌処理を行う処理槽を更に有する、請求項7または8に記載の排水処理装置。   The said waste water treatment apparatus further has a processing tank which performs a decolorization sterilization process using the treated water electrolyzed in the said electrolytic treatment tank, the said separated water, and hypochlorous acid. Wastewater treatment equipment. 固形物を含む排水を電解処理する排水処理方法であって、
前記排水から分離された固形物を含む汚泥水を貯留する貯留工程と、
貯留された汚泥水に含まれる固形物を前記排水から固形物が分離された分離水に混合して前記分離水の固形物濃度を調整する調整工程と、
固形物濃度が調整された分離水を電解処理する電解処理工程と、からなる排水処理方法。
A wastewater treatment method for electrolytically treating wastewater containing solid matter,
A storage step of storing sludge water containing solid matter separated from the waste water;
An adjustment step of adjusting the solids concentration of the separated water by mixing solids contained in the stored sludge water with the separated water from which the solids are separated from the waste water;
A wastewater treatment method comprising: an electrolytic treatment step of electrolytically treating separated water having a solid matter concentration adjusted.
前記調整工程において、前記分離水の固形物濃度を検出し、その検出結果に基づいて前記分離水と混合される汚泥水の量を制御することで、前記分離水の固形物濃度を調整する、請求項10に記載の排水処理方法。   In the adjustment step, the solids concentration of the separated water is detected, and the solids concentration of the separated water is adjusted by controlling the amount of sludge water mixed with the separated water based on the detection result. The wastewater treatment method according to claim 10. 前記排水処理方法は、前記貯留工程において貯留された汚泥水から水分を脱水する脱水工程と、前記脱水工程において前記汚泥水から水分が脱水されて生成された固形物を貯留する汚泥貯留工程と、を更に含み、
前記調整工程において、前記分離水の固形物濃度を検出し、その検出結果に基づいて前記分離水と混合される前記貯留工程にて貯留された汚泥水の量及び/又は前記汚泥貯留工程にて貯留された固形物の量を制御することで、前記分離水の固形物濃度を調整する、請求項10に記載の排水処理方法。
The wastewater treatment method includes a dehydration step of dehydrating water from the sludge water stored in the storage step, and a sludge storage step of storing solid matter generated by dehydrating water from the sludge water in the dehydration step; Further including
In the adjustment step, the solids concentration of the separated water is detected, and the amount of sludge water stored in the storage step mixed with the separated water based on the detection result and / or the sludge storage step The wastewater treatment method according to claim 10, wherein the solid concentration of the separated water is adjusted by controlling an amount of the stored solid matter.
前記電解処理工程において、前記脱水工程で汚泥水から分離された水分を電解処理する、請求項12に記載の排水処理方法。   The wastewater treatment method according to claim 12, wherein in the electrolytic treatment step, the water separated from the sludge water in the dehydration step is subjected to electrolytic treatment. 前記排水処理方法は、前記電解処理工程で電解処理された処理水を前記排水に循環する循環工程を更に含む、請求項13に記載の排水処理方法。   The wastewater treatment method according to claim 13, wherein the wastewater treatment method further includes a circulation step of circulating the treated water electrolytically treated in the electrolytic treatment step to the wastewater. 前記排水処理方法は、前記電解処理工程で電解処理された処理水と前記分離水と次亜塩素酸とを用いて脱色減菌処理を行う処理工程を更に含む、請求項13または14に記載の排水処理方法。   The waste water treatment method according to claim 13 or 14, further comprising a treatment step of performing a decolorization sterilization treatment using the treated water electrolyzed in the electrolytic treatment step, the separated water, and hypochlorous acid. Wastewater treatment method.
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JPS5660691A (en) * 1979-10-23 1981-05-25 Ebara Infilco Co Ltd Treatment of waste water containing organic substance
JPS5884100A (en) * 1981-11-13 1983-05-20 Ebara Infilco Co Ltd Treatment of sewage sludge
JP2004351354A (en) * 2003-05-30 2004-12-16 Hitachi Kiden Kogyo Ltd Sludge treatment method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4925555A (en) * 1972-07-01 1974-03-07
JPS5660691A (en) * 1979-10-23 1981-05-25 Ebara Infilco Co Ltd Treatment of waste water containing organic substance
JPS5884100A (en) * 1981-11-13 1983-05-20 Ebara Infilco Co Ltd Treatment of sewage sludge
JP2004351354A (en) * 2003-05-30 2004-12-16 Hitachi Kiden Kogyo Ltd Sludge treatment method

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