JP2007000781A - Waste water treatment method and device - Google Patents

Waste water treatment method and device Download PDF

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JP2007000781A
JP2007000781A JP2005184140A JP2005184140A JP2007000781A JP 2007000781 A JP2007000781 A JP 2007000781A JP 2005184140 A JP2005184140 A JP 2005184140A JP 2005184140 A JP2005184140 A JP 2005184140A JP 2007000781 A JP2007000781 A JP 2007000781A
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ozone
waste water
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Kenichiro Kimura
建一郎 木村
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for subjecting waste water to purification treatment with ozone-treated water where waste water is purified by the purification action of ozone without depending on the conventional chemical treatment, the waste water can be exhausted as recycled waste water or the like, further, the compacting and simplification of the whole picture of the device are attained compared with the conventional chemical treatment, maintenance is facilitated together with the operations of device apparatus, adverse influence on the nature caused by chemical use is eliminated, and articles of consumption are made needless. <P>SOLUTION: Waste water is successively fed into a plurality of ozone treatment tanks (2, 3), the waste water is discharged from each ozone treatment tank, and ozone is dissolved therein, so as to be an ozone-treated water. Thereafter, the ozone-treated water is returned to each ozone treatment tank, and the water after purification from the ozone treatment tank (3) on the lowest stream is exhausted. In this way, the waste water is purified without depending on the conventional chemical treatment, and can be exhausted as recycled waste water or the like. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、廃水をオゾン処理水で浄化処理する方法及び装置に関する。   The present invention relates to a method and apparatus for purifying wastewater with ozone-treated water.

従来、廃水の浄化処理には、苛性ソーダ、硫酸等を使用するいわゆる薬品処理方法が一般に採用されている。   Conventionally, a so-called chemical treatment method using caustic soda, sulfuric acid or the like has been generally employed for purification of wastewater.

また、ＣＯＤ（Chemical Oxygen Demand）、ＢＯＤ（Biochemical Oxygen Demand）を低減したり、色成分を除去したりする目的で上記薬品処理に付随してオゾン処理が行われる場合もある（例えば、特許文献１参照）。   In addition, ozone treatment may be performed accompanying the chemical treatment for the purpose of reducing COD (Chemical Oxygen Demand) and BOD (Biochemical Oxygen Demand) or removing color components (for example, Patent Document 1). reference).

特開平６−２４６２９４号公報JP-A-6-246294

従来の薬品処理方法によれば、処理装置が大型化、複雑化し、装置機器のオペレーション、維持管理に高度の技術を必要とする。また、薬剤を多量に使用することによる自然界への悪影響が問題となる。オゾンを主体にして廃水を浄化処理すればそのような問題が解消すると考えられるが、オゾンを槽内の廃水に導くと、発泡が著しくその酸化力等が低減するので浄化が不十分となる。十分な浄化を行おうとすると長時間を要し、また多量のオゾンを必要とするという問題がある。   According to the conventional chemical processing method, the processing apparatus becomes larger and more complicated, and advanced technology is required for the operation and maintenance of the equipment. In addition, adverse effects on the natural world due to the use of a large amount of drugs become a problem. It is considered that such a problem can be solved by purifying waste water mainly using ozone. However, if ozone is introduced into the waste water in the tank, the foaming is remarkably reduced and its purification power becomes insufficient. There is a problem that it takes a long time to perform sufficient purification and a large amount of ozone is required.

従って、本発明は上記問題点を解決することができる廃水処理方法及び装置を提供することを目的とする。   Accordingly, an object of the present invention is to provide a wastewater treatment method and apparatus that can solve the above-described problems.

上記課題を解決するため、請求項１に係る発明は、廃水を複数個のオゾン処理槽（２，３）内へと順次送り、各オゾン処理槽（２，３）から廃水を取り出しオゾンを溶存させてオゾン処理水とした後、このオゾン処理水を各オゾン処理槽（２，３）内に戻し、最下流のオゾン処理槽（３）から浄化後の水を排出するようにした廃水処理方法を採用する。   In order to solve the above-mentioned problem, the invention according to claim 1 is configured to sequentially send waste water into a plurality of ozone treatment tanks (2, 3), take out the waste water from each ozone treatment tank (2, 3), and dissolve ozone. Waste water treatment method in which the ozone treated water is returned to the ozone treated tanks (2, 3) and the purified water is discharged from the most downstream ozone treated tank (3). Is adopted.

また、請求項２に係る発明は、請求項１に記載の廃水処理方法において、最下流のオゾン処理槽（３）から排出される水が浄化不良の場合に、この水を上流側の所望のオゾン処理槽（２）に戻すようにした廃水処理方法を採用する。   Further, the invention according to claim 2 is the wastewater treatment method according to claim 1, wherein when the water discharged from the most downstream ozone treatment tank (3) is poorly purified, A wastewater treatment method is adopted that returns to the ozone treatment tank (2).

また、請求項３に係る発明は、請求項１又は請求項２に記載の廃水処理方法において、各オゾン処理槽（２，３）から排出される廃水を活性炭で処理して下流側のオゾン処理槽（３）に流す廃水処理方法を採用する。   The invention according to claim 3 is the wastewater treatment method according to claim 1 or claim 2, wherein the wastewater discharged from each ozone treatment tank (2, 3) is treated with activated carbon to perform downstream ozone treatment. Adopt wastewater treatment method to flow into the tank (3).

また、請求項４に係る発明は、廃水の導管（１ａ，１ｂ）を介して直列に接続された複数個のオゾン処理槽（２，３）と、各オゾン処理槽（２，３）から廃水を取り出しオゾンを溶存させてオゾン処理水とした後このオゾン処理水を各オゾン処理槽（２，３）内に戻す混合機（４，５）とを具備し、最上流のオゾン処理槽（２）内に導いた廃水を下流側のオゾン処理槽（３）へと順に送って最下流のオゾン処理槽（３）から浄化後の水を排出するようにした廃水処理装置を採用する。   Moreover, the invention which concerns on Claim 4 is a waste water from several ozone treatment tanks (2, 3) connected in series via the conduit | pipe (1a, 1b) of waste water, and each ozone treatment tank (2, 3). And a mixer (4, 5) for returning the ozone-treated water to each ozone-treated tank (2, 3) after dissolving the ozone into the ozone-treated water. The most upstream ozone-treated tank (2 ) A wastewater treatment apparatus is adopted in which wastewater introduced into the inside is sent sequentially to the downstream ozone treatment tank (3) and the purified water is discharged from the most downstream ozone treatment tank (3).

また、請求項５に係る発明は、請求項４に記載の廃水処理装置において、最下流のオゾン処理槽（３）から排出される水が浄化不良の場合に、この水を上流側の所望のオゾン処理槽（２）に戻すようにした廃水処理装置を採用する。   Further, the invention according to claim 5 is the wastewater treatment apparatus according to claim 4, wherein when the water discharged from the most downstream ozone treatment tank (3) is poorly purified, A wastewater treatment device adapted to return to the ozone treatment tank (2) is adopted.

また、請求項６に係る発明は、請求項４又は請求項５に記載の廃水処理装置において、各オゾン処理槽（２，３）の下流に活性炭処理槽（１６，２０）を配置し、廃水が各オゾン処理槽（２，３）を出るたびに活性炭で処理するようにした廃水処理装置を採用する。   The invention according to claim 6 is the wastewater treatment apparatus according to claim 4 or claim 5, wherein the activated carbon treatment tank (16, 20) is disposed downstream of each ozone treatment tank (2, 3), and the wastewater Adopts a wastewater treatment device that treats with activated carbon every time it exits each ozone treatment tank (2, 3).

本発明によれば、従来の薬品処理に依らずオゾンの浄化作用により廃水を浄化し、廃水を中水等として排出することができる。また、従来の薬品処理の場合に比較して、装置全容のコンパクト化、シンプル化が達成され、装置機器のオペレーションとともに維持管理が容易となり、薬剤使用による自然への悪影響が無くなり、消耗品が不要になる。   According to the present invention, wastewater can be purified by ozone purification action and discharged as middle water or the like without depending on conventional chemical treatment. Compared to conventional chemical treatment, the entire equipment has been made more compact and simpler, and it is easier to maintain and manage with the operation of equipment, eliminating the adverse effects on the natural environment caused by the use of chemicals and eliminating the need for consumables. become.

以下、図面を参照して本発明を実施するための最良の形態について説明する。   The best mode for carrying out the present invention will be described below with reference to the drawings.

図１に示す廃水処理装置は、廃水を所望数のオゾン処理槽内へと順次送り、各オゾン処理槽から廃水を取り出しオゾンを溶存させてオゾン処理水とした後、このオゾン処理水を各オゾン処理槽内に戻し、最下流のオゾン処理槽から浄化後の水を排出するように構成される。   The waste water treatment apparatus shown in FIG. 1 sequentially feeds waste water into a desired number of ozone treatment tanks, takes out the waste water from each ozone treatment tank and dissolves ozone into ozone treated water. It returns to the inside of a processing tank, and it is comprised so that the water after purification | cleaning may be discharged | emitted from the ozone processing tank of the most downstream.

具体的には、廃水の導管１ａ，１ｂを介して直列に接続された第一のオゾン処理槽２および第二のオゾン処理槽３と、各オゾン処理槽２，３から廃水を取り出しオゾンを溶存させてオゾン処理水とした後このオゾン処理水を各オゾン処理槽２，３内に戻す混合機である第一の混合用ポンプ４および第二の混合用ポンプ５とを具備する。   Specifically, the waste water is taken out from the first ozone treatment tank 2 and the second ozone treatment tank 3 and the ozone treatment tanks 2 and 3 connected in series via the waste water conduits 1a and 1b, and the ozone is dissolved. Then, after the ozone treated water is obtained, the first mixed pump 4 and the second mixed pump 5 which are mixers for returning the ozone treated water into the respective ozone treatment tanks 2 and 3 are provided.

導管１の最上流側には廃水を圧送する原水ポンプ６が設けられる。原水ポンプ６から第一のオゾン処理槽２に至る導管１ａ上には、第一のブロア槽７、第二のブロア槽８、第一の沈殿槽９が下流側に向って順に配置される。第一と第二のブロア槽７，８にはブロア１０が連結される。廃水は原水ポンプ６によって第一と第二のブロア槽７，８へと送られ、ブロア１０から送られる空気によって第一と第二のブロア槽７，８内で攪拌され、第一の沈殿槽９内で汚泥、沈殿物等の重量物が除去され、第一の沈殿槽９内の廃水の上澄み液が第一のオゾン処理槽２に送られる。   A raw water pump 6 for pumping waste water is provided on the most upstream side of the conduit 1. On the conduit 1a extending from the raw water pump 6 to the first ozone treatment tank 2, a first blower tank 7, a second blower tank 8, and a first settling tank 9 are arranged in order toward the downstream side. A blower 10 is connected to the first and second blower tanks 7 and 8. Waste water is sent to the first and second blower tanks 7 and 8 by the raw water pump 6, and is stirred in the first and second blower tanks 7 and 8 by the air sent from the blower 10, and the first settling tank. Heavy substances such as sludge and sediment are removed in 9, and the supernatant liquid of waste water in the first sedimentation tank 9 is sent to the first ozone treatment tank 2.

第一のオゾン処理槽２には第一の混合用ポンプ４が付設され、第一のオゾン処理槽２と第一の混合用ポンプ４との間が循環用の導管１１で連結される。また、第一の混合用ポンプ４は、オゾン発生装置１２と給気用の管路１３で接続される。オゾン発生装置１２にはコンプレッサ１４とＰＳＡ（Pressure Swing Adsorption）装置１５が付属する。コンプレッサ１４で圧送される空気からＰＳＡ装置１５が酸素を分離し、この酸素からオゾン発生装置１２が放電によってオゾンを発生させる。このオゾンが上記管路１３から第一の混合用ポンプ４に至り、第一の混合用ポンプ４によって、上記第一のオゾン処理槽２から循環用の導管１１を流れて来る廃水と混合される。第一の混合用ポンプ４により、廃水はオゾンが溶存したオゾン処理水となり、循環用の導管１１から再び第一のオゾン処理槽２内に戻り、第一のオゾン処理槽２内の廃水と混じり合う。このように第一のオゾン処理槽２と第一の混合用ポンプ４との間を廃水が循環することにより、未反応オゾンが第一の処理槽２内に繰り返し戻され、第一のオゾン処理槽２内の廃水はオゾン処理水として濃度が高まることとなり、廃液内でオゾンが激しく発泡することもなく、廃液に対する殺菌、酸化、脱臭、漂白等の各種浄化処理が適正かつ円滑に行われる。   A first mixing pump 4 is attached to the first ozone treatment tank 2, and a circulation conduit 11 connects the first ozone treatment tank 2 and the first mixing pump 4. The first mixing pump 4 is connected to the ozone generator 12 through a supply pipe 13. The ozone generator 12 includes a compressor 14 and a PSA (Pressure Swing Adsorption) device 15. The PSA device 15 separates oxygen from the air pumped by the compressor 14, and the ozone generator 12 generates ozone from the oxygen by discharge. This ozone reaches the first mixing pump 4 from the pipe 13 and is mixed with the waste water flowing from the first ozone treatment tank 2 through the circulation conduit 11 by the first mixing pump 4. . The waste water becomes ozone-treated water in which ozone is dissolved by the first mixing pump 4 and returns to the first ozone treatment tank 2 from the circulation conduit 11 and is mixed with the waste water in the first ozone treatment tank 2. Fit. In this way, the waste water circulates between the first ozone treatment tank 2 and the first mixing pump 4, whereby unreacted ozone is repeatedly returned into the first treatment tank 2, and the first ozone treatment is performed. The concentration of the waste water in the tank 2 is increased as ozone-treated water, and ozone does not foam vigorously in the waste liquid, and various purification treatments such as sterilization, oxidation, deodorization, and bleaching of the waste liquid are performed appropriately and smoothly.

第一のオゾン処理槽２から第二のオゾン処理槽３に至る導管１ｂ上には、望ましくは第一の活性炭槽１６と第二の沈殿槽１７が下流側に向って順に配置される。第一の活性炭槽１６は槽内に活性炭を充満させてなるもので、第一のオゾン処理槽２を出た廃水はこの第一の活性炭槽１６を通過することにより、菌等の異物を吸着除去され、これによりＣＯＤ、ＢＯＤのさらなる低減が達成される。また、第一の活性炭槽１６を通り抜けた重量物が第二の沈殿槽１７において廃水から除去される。   On the conduit 1b extending from the first ozone treatment tank 2 to the second ozone treatment tank 3, a first activated carbon tank 16 and a second precipitation tank 17 are desirably arranged in order toward the downstream side. The first activated carbon tank 16 is formed by filling the tank with activated carbon, and the waste water discharged from the first ozone treatment tank 2 passes through the first activated carbon tank 16 to adsorb foreign substances such as bacteria. This is achieved, thereby further reducing COD and BOD. In addition, heavy objects that have passed through the first activated carbon tank 16 are removed from the waste water in the second sedimentation tank 17.

第二の沈殿槽１７の下流側に第二のオゾン処理槽３が配置される。この第二のオゾン処理槽３には第二の混合用ポンプ５が付設され、第二のオゾン処理槽３と第二の混合用ポンプ５との間が循環用の導管１８で連結される。第二のオゾン処理槽３及び第二の混合用ポンプ５は第一のオゾン処理槽２及び第一の混合用ポンプ４と同様な構成を有し、同様な作用をする。第二の混合用ポンプ５には、上記オゾン発生装置１２と給気用の管路１９で接続される。オゾン発生装置１２で発生したオゾンがこの管路１９から第二の混合用ポンプ５に至り、第二の混合用ポンプ５によって、第二のオゾン処理槽３から循環用の導管１８を流れて来る廃水と混合される。第二の混合用ポンプ５により、廃水はオゾンが溶存したオゾン処理水となり、循環用の導管１８から再び第二のオゾン処理槽３内に戻り、第二のオゾン処理槽３内の廃水と混じり合う。このように第二のオゾン処理槽３と第二の混合用ポンプ５との間を廃水が循環することにより、第二のオゾン処理槽３内の廃水はオゾン処理水としての濃度が高まり、殺菌、酸化、脱臭、漂白等の各種浄化処理が適正に行われる。オゾンは不安定で分解しやすいので、このように第一のオゾン処理槽２に加え第二のオゾン処理槽３で処理されることにより、廃水はより適正に浄化される。   The second ozone treatment tank 3 is disposed on the downstream side of the second sedimentation tank 17. The second ozone treatment tank 3 is provided with a second mixing pump 5, and the second ozone treatment tank 3 and the second mixing pump 5 are connected by a circulation conduit 18. The second ozone treatment tank 3 and the second mixing pump 5 have the same configuration as the first ozone treatment tank 2 and the first mixing pump 4 and perform the same operation. The second mixing pump 5 is connected to the ozone generator 12 through a supply air line 19. Ozone generated in the ozone generator 12 reaches the second mixing pump 5 from this pipe line 19 and flows from the second ozone treatment tank 3 through the circulation conduit 18 by the second mixing pump 5. Mixed with wastewater. By the second mixing pump 5, the waste water becomes ozone-treated water in which ozone is dissolved and returns to the second ozone treatment tank 3 again from the circulation conduit 18 and is mixed with the waste water in the second ozone treatment tank 3. Fit. As described above, the waste water circulates between the second ozone treatment tank 3 and the second mixing pump 5, so that the concentration of the waste water in the second ozone treatment tank 3 is increased as the ozone treatment water, and sterilization is performed. Various purification treatments such as oxidation, deodorization and bleaching are appropriately performed. Since ozone is unstable and easily decomposed, wastewater is more appropriately purified by being treated in the second ozone treatment tank 3 in addition to the first ozone treatment tank 2 in this way.

第二のオゾン処理槽３からは排水用の導管１ｃが下流側に伸びており、この導管１ｃ上にも上記第一のオゾン処理槽２に対すると同様に、望ましくは第二の活性炭槽２０と第三の沈殿槽２１が下流側に向って順に配置される。第二の活性炭槽２０及び第三の沈殿槽２１は第一の活性炭槽１６及び第二の沈殿槽１７と同様な構成である。第二のオゾン処理槽３を出た廃水はこの第二の活性炭槽２０を通過することにより、菌等の異物を吸着除去され、ＣＯＤ、ＢＯＤのさらなる低減が達成される。また、第二の活性炭槽２０を通り抜けた重量物が第三の沈殿槽２１において廃水から除去される。   From the second ozone treatment tank 3, a drainage conduit 1 c extends downstream, and the second activated carbon tank 20 is desirably disposed on the conduit 1 c as well as the first ozone treatment tank 2. The 3rd sedimentation tank 21 is arrange | positioned in order toward the downstream. The second activated carbon tank 20 and the third precipitation tank 21 have the same configuration as the first activated carbon tank 16 and the second precipitation tank 17. The waste water that has exited the second ozone treatment tank 3 passes through the second activated carbon tank 20 to adsorb and remove foreign substances such as bacteria, thereby achieving further reduction of COD and BOD. In addition, heavy objects that have passed through the second activated carbon tank 20 are removed from the waste water in the third settling tank 21.

第三の沈殿槽２１内における廃水の上澄み液は排水用の導管１ｃから排水確認槽２２に至り、排水確認槽２２で浄化処理の適否が判別されたうえで外部に排出される。   The supernatant of the wastewater in the third sedimentation tank 21 reaches the drainage confirmation tank 22 from the drainage conduit 1c, and is discharged to the outside after the drainage confirmation tank 22 determines the suitability of the purification treatment.

排水確認槽２２よりも下流側には、必要に応じて、公知の水質検査装置２３が配置される。この実施の形態では、水質検査装置２３によってＣＯＤ、ＢＯＤが十分であると判断されると、排出用の導管１ｃから処理装置外に排出され、不十分であると検知されると、廃水は再び帰還用の導管１ｄから第一のブロア槽７に戻され、第一と第二のオゾン処理槽２，３で浄化処理される。   A known water quality inspection device 23 is disposed downstream of the drainage confirmation tank 22 as necessary. In this embodiment, when it is determined by the water quality inspection device 23 that COD and BOD are sufficient, the waste water is discharged again from the treatment pipe 1c and discharged from the treatment device. It is returned to the first blower tank 7 from the return conduit 1d and purified in the first and second ozone treatment tanks 2 and 3.

その他、必要に応じて排オゾン導管１ｅが、第一のオゾン処理槽２及び第二のオゾン処理槽３と第一のブロア槽７及び第二のブロア槽８との間に設けられる。これにより、排オゾンが第一のブロア槽７及び第二のブロア槽８へと導かれ、第一のブロア槽７及び第二のブロア槽８内で分解されてオゾンの脱臭が行われる。   In addition, if necessary, an exhaust ozone conduit 1 e is provided between the first ozone treatment tank 2 and the second ozone treatment tank 3 and the first blower tank 7 and the second blower tank 8. As a result, the exhausted ozone is guided to the first blower tank 7 and the second blower tank 8 and is decomposed in the first blower tank 7 and the second blower tank 8 to deodorize ozone.

次に、上記構成の廃水処理装置の作用について説明する。   Next, the operation of the wastewater treatment apparatus configured as described above will be described.

廃水が原水ポンプ６によって第一と第二のブロア槽７，８へと送られ、ブロア１０から送られる空気によって第一と第二のブロア槽７，８内で攪拌される。続いて、第一の沈殿槽９内で汚泥、沈殿物等の重量物が除去され、第一の沈殿槽９内の廃水の上澄み液が第一のオゾン処理槽２に送られる。   Waste water is sent to the first and second blower tanks 7 and 8 by the raw water pump 6, and is stirred in the first and second blower tanks 7 and 8 by the air sent from the blower 10. Subsequently, heavy substances such as sludge and sediment are removed in the first sedimentation tank 9, and the supernatant liquid of the waste water in the first sedimentation tank 9 is sent to the first ozone treatment tank 2.

一方、オゾン発生装置１２が放電によってオゾンを発生させ、このオゾンが管路１３から第一の混合用ポンプ４に送られる。   On the other hand, the ozone generator 12 generates ozone by discharge, and this ozone is sent from the conduit 13 to the first mixing pump 4.

第一の混合用ポンプ４が、第一のオゾン処理槽２から循環用の導管１１を流れて来る廃水とオゾンとを混合する。第一の混合用ポンプ４により、廃水はオゾンが溶存したオゾン処理水となり、循環用の導管１１から再び第一のオゾン処理槽２内に戻り、第一のオゾン処理槽２内の廃水と混じり合う。   The first mixing pump 4 mixes ozone with waste water flowing from the first ozone treatment tank 2 through the circulation conduit 11. The waste water becomes ozone-treated water in which ozone is dissolved by the first mixing pump 4, and returns to the first ozone treatment tank 2 from the circulation conduit 11 and is mixed with the waste water in the first ozone treatment tank 2. Fit.

第一のオゾン処理槽２と第一の混合用ポンプ４との間を廃水とともにオソ゛ン処理水が循環することにより、第一のオゾン処理槽２内の廃水に対し殺菌、酸化、脱臭、漂白等の各種浄化処理が行われる。   Wastewater and ozone-treated water circulate between the first ozone treatment tank 2 and the first mixing pump 4 to sterilize, oxidize, deodorize and bleach the wastewater in the first ozone treatment tank 2. Various purification processes are performed.

第一のオゾン処理槽２を出た廃水は第一の活性炭槽１６を通過することにより、菌等の異物を吸着除去される。これにより、ＣＯＤ、ＢＯＤがさらに低減する。また、第一の活性炭槽１６を通り抜けた重量物が第二の沈殿槽１７で除去される。   The waste water that has exited the first ozone treatment tank 2 passes through the first activated carbon tank 16 to adsorb and remove foreign substances such as bacteria. Thereby, COD and BOD are further reduced. In addition, heavy objects that have passed through the first activated carbon tank 16 are removed by the second precipitation tank 17.

第二の沈殿槽１７から廃液の上澄み液が第二のオゾン処理槽３へと流出する。   The supernatant liquid of the waste liquid flows out from the second sedimentation tank 17 to the second ozone treatment tank 3.

上記オゾン発生装置１２で発生したオゾンが管路１９から第二の混合用ポンプ５に至り、第二の混合用ポンプ５によって、第二のオゾン処理槽３から循環用の導管１８を流れる廃水と混合される。第二の混合用ポンプ５により、廃水はオゾンが溶存したオゾン処理水となり、循環用の導管１８から再び第二のオゾン処理槽３内に戻り、第二のオゾン処理槽３内の廃水と混じり合う。これにより、第二のオゾン処理槽３内の廃水が、殺菌、酸化、脱臭、漂白等により浄化される。   The ozone generated in the ozone generator 12 reaches the second mixing pump 5 from the pipe line 19, and the second mixing pump 5 causes waste water flowing through the circulation conduit 18 from the second ozone treatment tank 3. Mixed. By the second mixing pump 5, the waste water becomes ozone-treated water in which ozone is dissolved, returns to the second ozone treatment tank 3 again from the circulation conduit 18, and is mixed with the waste water in the second ozone treatment tank 3. Fit. Thereby, the waste water in the second ozone treatment tank 3 is purified by sterilization, oxidation, deodorization, bleaching and the like.

第二のオゾン処理槽３を出た廃水は、第二の活性炭槽２０を通過することにより、菌等の異物を吸着除去される。これにより、ＣＯＤ、ＢＯＤがさらに低下する。また、重量物が第三の沈殿槽２１において廃水から除去される。   The waste water that has exited the second ozone treatment tank 3 passes through the second activated carbon tank 20 to adsorb and remove foreign substances such as bacteria. Thereby, COD and BOD further decrease. Further, heavy objects are removed from the waste water in the third sedimentation tank 21.

第三の沈殿槽２１内における廃水の上澄み液は、排水用の導管１ｃから排水確認槽２２に至り、排水確認槽２２で浄化処理の適否が判別されたうえで外部に排出される。   The supernatant liquid of the wastewater in the third sedimentation tank 21 reaches the drainage confirmation tank 22 from the drainage conduit 1c, and is discharged to the outside after the drainage confirmation tank 22 determines the suitability of the purification treatment.

ＣＯＤ、ＢＯＤ等が不十分な場合は、廃液は上流側の第一のブロア槽７に戻され、オゾン処理槽２，３で再びオゾンにより浄化処理された上で排出される。   When COD, BOD, etc. are insufficient, the waste liquid is returned to the first blower tank 7 on the upstream side, purified again by ozone in the ozone treatment tanks 2 and 3, and then discharged.

なお、本発明は上記実施の形態に限定されるものではなく、例えば上記実施の形態では第二のオゾン処理槽を通過した廃水を検査後に再び第一のオゾン処理槽に戻するようにしているが、もとに戻すことなく第三、第四・・・のオゾン処理槽を設けてさらにオゾン処理を繰り返した後に排水するようにしてもよい。   The present invention is not limited to the above embodiment. For example, in the above embodiment, waste water that has passed through the second ozone treatment tank is returned to the first ozone treatment tank after the inspection. However, the ozone treatment tanks of the third, fourth,... May be provided without returning to the original, and the ozone treatment may be repeated and then drained.

本発明の実施の形態に係る廃水処理装置を示す概略ブロック図である。It is a schematic block diagram which shows the wastewater treatment apparatus which concerns on embodiment of this invention.

符号の説明Explanation of symbols

１ａ，１ｂ…導管
２，３…オゾン処理槽
４，５…混合機
１６，２０…活性炭処理槽 1a, 1b ... conduit 2,3 ... ozone treatment tank 4,5 ... mixer 16,20 ... activated carbon treatment tank

Claims (6)

廃水を複数個のオゾン処理槽内へと順次送り、各オゾン処理槽から廃水を取り出しオゾンを溶存させてオゾン処理水とした後、このオゾン処理水を各オゾン処理槽内に戻し、最下流のオゾン処理槽から浄化後の水を排出するようにしたことを特徴とする廃水処理方法。   The waste water is sequentially sent into a plurality of ozone treatment tanks, the waste water is taken out from each ozone treatment tank, and ozone is dissolved into ozone treated water. A wastewater treatment method characterized by discharging purified water from an ozone treatment tank. 請求項１に記載の廃水処理方法において、最下流のオゾン処理槽から排出される水が浄化不良の場合に、この水を上流側の所望のオゾン処理槽に戻すようにしたことを特徴とする廃水処理方法。   The wastewater treatment method according to claim 1, wherein when water discharged from the most downstream ozone treatment tank is poorly purified, the water is returned to a desired upstream ozone treatment tank. Wastewater treatment method. 請求項１又は請求項２に記載の廃水処理方法において、各オゾン処理槽から排出される廃水を活性炭で処理したうえで下流側のオゾン処理槽に流すようにしたことを特徴とする廃水処理方法。   The wastewater treatment method according to claim 1 or 2, wherein the wastewater discharged from each ozone treatment tank is treated with activated carbon and then allowed to flow into a downstream ozone treatment tank. . 廃水の導管を介して直列に接続された複数個のオゾン処理槽と、各オゾン処理槽から廃水を取り出しオゾンを溶存させてオゾン処理水とした後このオゾン処理水を各オゾン処理槽内に戻す混合機とを具備し、最上流のオゾン処理槽内に導いた廃水を下流側のオゾン処理槽へと順に送って最下流のオゾン処理槽から浄化後の水を排出するようにしたことを特徴とする廃水処理装置。   A plurality of ozone treatment tanks connected in series via waste water conduits, and after removing waste water from each ozone treatment tank to dissolve ozone into ozone treated water, this ozone treated water is returned to each ozone treatment tank The waste water led into the most upstream ozone treatment tank is sequentially sent to the downstream ozone treatment tank, and the purified water is discharged from the most downstream ozone treatment tank. Wastewater treatment equipment. 請求項４に記載の廃水処理装置において、最下流のオゾン処理槽から排出される水が浄化不良の場合に、この水を上流側の所望のオゾン処理槽に戻すようにしたことを特徴とする廃水処理装置。   5. The waste water treatment apparatus according to claim 4, wherein when the water discharged from the most downstream ozone treatment tank is poorly purified, the water is returned to a desired upstream ozone treatment tank. Waste water treatment equipment. 請求項４又は請求項５に記載の廃水処理装置において、各オゾン処理槽の下流に活性炭処理槽を配置し、廃水が各オゾン処理槽を出るたびに活性炭で処理するようにしたことを特徴とする廃水処理装置。   The waste water treatment apparatus according to claim 4 or 5, wherein an activated carbon treatment tank is disposed downstream of each ozone treatment tank, and the waste water is treated with activated carbon every time the ozone treatment tank exits. Wastewater treatment equipment.
JP2005184140A 2005-06-23 2005-06-23 Waste water treatment method and device Pending JP2007000781A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5761467B1 (en) * 2013-10-31 2015-08-12 千住金属工業株式会社 Flux recovery device and soldering device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5761467B1 (en) * 2013-10-31 2015-08-12 千住金属工業株式会社 Flux recovery device and soldering device
JP5761466B1 (en) * 2013-10-31 2015-08-12 千住金属工業株式会社 Flux recovery device and soldering device
EP3064304A4 (en) * 2013-10-31 2017-07-05 Senju Metal Industry Co., Ltd. Flux recovery device and soldering device
EP3064303A4 (en) * 2013-10-31 2017-07-05 Senju Metal Industry Co., Ltd Flux recovery device and soldering device
US9744612B2 (en) 2013-10-31 2017-08-29 Senju Metal Industry Co., Ltd. Flux recovery device and soldering device
US9744613B2 (en) 2013-10-31 2017-08-29 Senju Metal Industry Co., Ltd. Flux recovery device and soldering device

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