JP7202796B2 - Water treatment device and water treatment method - Google Patents

Water treatment device and water treatment method Download PDF

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JP7202796B2
JP7202796B2 JP2018129965A JP2018129965A JP7202796B2 JP 7202796 B2 JP7202796 B2 JP 7202796B2 JP 2018129965 A JP2018129965 A JP 2018129965A JP 2018129965 A JP2018129965 A JP 2018129965A JP 7202796 B2 JP7202796 B2 JP 7202796B2
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membrane filtration
peroxide
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明広 高田
圭一郎 福水
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Organo Corp
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Description

本発明は、タンパク質等の高分子有機物を含む高分子有機物含有水を処理する水処理装置および水処理方法に関する。 TECHNICAL FIELD The present invention relates to a water treatment apparatus and a water treatment method for treating water containing macromolecular organic substances such as proteins.

膜ろ過を連続運転していくと、ろ過水量が低下するファウリングが生じる。このファウリングを抑制する方法あるいは膜を洗浄する方法として、一般的には次亜塩素酸ナトリウム水溶液を膜の２次側から１次側に逆流させる方法が用いられる。さらに膜の洗浄性を高める方法として、塩素を含む水を膜の２次側から逆流させた後、その水を所定時間保持することで膜を洗浄する方法（特許文献１参照）や、マイクロバブルやナノバブルの微細気泡を用いた方法（特許文献２参照）がある。 Continuous operation of membrane filtration causes fouling that reduces the amount of filtered water. As a method of suppressing this fouling or a method of cleaning the membrane, generally a method of flowing back an aqueous sodium hypochlorite solution from the secondary side of the membrane to the primary side is used. Furthermore, as a method for improving the washability of the membrane, water containing chlorine is caused to flow back from the secondary side of the membrane, and then the water is held for a predetermined period of time to wash the membrane (see Patent Document 1). There is a method using fine bubbles such as nanobubbles (see Patent Document 2).

しかし、上記方法ではファウリングの抑制が不十分な場合がある。特に、養殖や水族館の飼育水のようなタンパク質等の高分子有機物を含む高分子有機物含有水を膜ろ過処理しようとする場合、タンパク質等の高分子有機物がファウリングを助長してしまう可能性がある。 However, the above method may not sufficiently suppress fouling. In particular, in the case of membrane filtration of water containing macromolecular organic matter, such as aquaculture or aquarium water, the macromolecular organic matter such as protein may promote fouling. be.

また、ファウリングが起きた場合、膜モジュール内の圧力が急激に上昇し、安定した膜処理ができなくなる可能性がある。さらに、一度ファウリングを起こしてしまった膜は、酸やアルカリ等を用いた薬品洗浄を行う必要があり、洗浄にかかるメンテナンス費用や、装置停止を見込んだ予備系列の設置等、コスト、設備面積が膨らむ要因となる。 Moreover, when fouling occurs, the pressure inside the membrane module rises rapidly, and there is a possibility that stable membrane treatment cannot be performed. Furthermore, once fouling has occurred on the membrane, it is necessary to perform chemical cleaning using acid or alkali. causes the expansion.

特開平１０－０１５３６５号公報JP-A-10-015365 特開２０１０－２５３４５７号公報JP 2010-253457 A

本発明の目的は、膜のファウリングを抑制し、安定した運転が可能な、高分子有機物含有水を処理する水処理装置および水処理方法を提供することにある。 An object of the present invention is to provide a water treatment apparatus and a water treatment method for treating high-molecular-weight organic matter-containing water, which can suppress membrane fouling and can be stably operated.

本発明は、高分子有機物を含む、水中生物の飼育水を処理する水処理装置であって、飼育水を貯留する水槽と、前記水槽からの前記飼育水を貯留する原水槽と、前記原水槽の水を循環しながら過酸化物を添加する過酸化物添加手段と、前記原水槽の水を膜ろ過処理する膜ろ過手段と、前記膜ろ過手段による膜ろ過処理で得られる濃縮水の少なくとも一部を前記原水槽に返送する濃縮水返送手段と、前記膜ろ過手段による膜ろ過処理で得られる膜ろ過水の過酸化物を分解処理する過酸化物分解手段と、前記過酸化物分解手段により分解処理した処理水の少なくとも一部を前記水槽に返送する処理水返送手段と、を備える、水処理装置である。 The present invention is a water treatment apparatus for treating breeding water for aquatic organisms containing macromolecular organic matter, comprising a tank for storing the breeding water, a raw water tank for storing the breeding water from the water tank, and the raw water tank. At least one of a peroxide addition means for adding peroxide while circulating the water in the water tank, a membrane filtration means for performing membrane filtration on the water in the raw water tank, and a concentrated water obtained by membrane filtration by the membrane filtration means. by a concentrated water returning means for returning the part to the raw water tank, a peroxide decomposition means for decomposing the peroxide of the membrane filtered water obtained by the membrane filtration treatment by the membrane filtration means, and the peroxide decomposition means a treated water return means for returning at least part of the treated water that has been decomposed and treated to the water tank.

本発明は、高分子有機物を含む、水中生物の飼育水を処理する水処理装置であって、飼育水を貯留する水槽と、前記水槽からの前記飼育水を貯留する原水槽と、前記原水槽の水を膜ろ過処理する膜ろ過手段と、前記膜ろ過手段による膜ろ過処理で得られる濃縮水に過酸化物を添加する過酸化物添加手段と、前記過酸化物添加手段により得られる過酸化物含有水の少なくとも一部を前記原水槽に返送する過酸化物含有水返送手段と、前記膜ろ過手段による膜ろ過処理で得られる膜ろ過水の過酸化物を分解処理する過酸化物分解手段と、前記過酸化物分解手段により分解処理した処理水の少なくとも一部を前記水槽に返送する処理水返送手段と、を備える、水処理装置である。 The present invention is a water treatment apparatus for treating breeding water for aquatic organisms containing macromolecular organic matter, comprising a tank for storing the breeding water, a raw water tank for storing the breeding water from the water tank, and the raw water tank. Membrane filtration means for membrane filtration of water, peroxide addition means for adding peroxide to concentrated water obtained by membrane filtration by said membrane filtration means, and peroxide obtained by said peroxide addition means a peroxide-containing water returning means for returning at least part of the substance-containing water to the raw water tank; and a treated water return means for returning at least part of the treated water decomposed by the peroxide decomposition means to the water tank.

前記水処理装置において、前記過酸化物添加手段が、オゾンを用いる手段であることが好ましい。 In the water treatment apparatus, the peroxide adding means is preferably means using ozone.

本発明は、高分子有機物を含む、水中生物の飼育水を処理する水処理方法であって、水槽から原水槽へ送液された飼育水を前記原水槽へ循環しながら過酸化物を添加する過酸化物添加工程と、前記原水槽の水を膜ろ過処理する膜ろ過工程と、前記膜ろ過工程による膜ろ過処理で得られる濃縮水の少なくとも一部を前記原水槽に返送する濃縮水返送工程と、前記膜ろ過工程による膜ろ過処理で得られる膜ろ過水の過酸化物を分解処理する過酸化物分解工程と、前記過酸化物分解工程により分解処理した処理水の少なくとも一部を前記水槽に返送する処理水返送工程と、を含む、水処理方法である。 The present invention is a water treatment method for treating breeding water for aquatic organisms containing macromolecular organic matter, wherein the breeding water sent from a water tank to a raw water tank is circulated to the raw water tank while a peroxide is added. A peroxide addition step, a membrane filtration step of performing membrane filtration treatment on the water in the raw water tank, and a concentrated water returning step of returning at least part of the concentrated water obtained by the membrane filtration treatment in the membrane filtration step to the raw water tank. and a peroxide decomposition step of decomposing the peroxide of the membrane filtered water obtained in the membrane filtration process by the membrane filtration step; and a treated water returning step to be returned to the water treatment method.

本発明は、高分子有機物を含む、水中生物の飼育水を処理する水処理方法であって、水槽から原水槽へ送液された飼育水を膜ろ過処理する膜ろ過工程と、前記膜ろ過工程による膜ろ過処理で得られる濃縮水に過酸化物を添加する過酸化物添加工程と、前記過酸化物添加工程により得られる過酸化物含有水の少なくとも一部を前記原水槽に返送する過酸化物含有水返送工程と、前記膜ろ過工程による膜ろ過処理で得られる膜ろ過水の過酸化物を分解処理する過酸化物分解工程と、前記過酸化物分解工程により分解処理した処理水の少なくとも一部を前記水槽に返送する処理水返送工程と、を含む、水処理方法である。 The present invention is a water treatment method for treating breeding water for aquatic organisms containing macromolecular organic matter, comprising a membrane filtration process for membrane filtration of breeding water sent from a water tank to a raw water tank, and the membrane filtration process. and a peroxide addition step of adding a peroxide to the concentrated water obtained by the membrane filtration treatment, and a peroxide addition step of returning at least a part of the peroxide-containing water obtained by the peroxide addition step to the raw water tank. A substance-containing water returning step, a peroxide decomposition step of decomposing the peroxide of the membrane filtered water obtained in the membrane filtration process by the membrane filtration step, and at least the treated water decomposed by the peroxide decomposition step and a treated water returning step of returning a part of the treated water to the water tank.

前記水処理方法において、前記過酸化物添加工程が、オゾンを用いる工程であることが好ましい。 In the water treatment method, the peroxide addition step is preferably a step using ozone.

本発明により、膜のファウリングを抑制し、安定した運転が可能な、高分子有機物含有水を処理する水処理装置および水処理方法を提供することができる。 INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a water treatment apparatus and a water treatment method capable of suppressing fouling of membranes and capable of stable operation for treating water containing high-molecular-weight organic substances.

本発明の実施形態に係る水処理装置の一例を示す概略構成図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows an example of the water treatment apparatus which concerns on embodiment of this invention. 本発明の実施形態に係る水処理装置の他の例を示す概略構成図である。It is a schematic block diagram which shows the other example of the water treatment apparatus which concerns on embodiment of this invention. ヒラメを飼育した飼育水のＬＣ－ＯＣＤ測定結果を示す図である。FIG. 4 is a diagram showing LC-OCD measurement results of breeding water in which flatfish were bred. 実施例１および比較例１における、経過日数に対する膜間差圧を示すグラフである。4 is a graph showing transmembrane pressure versus elapsed days in Example 1 and Comparative Example 1. FIG. 実施例２および比較例２における、経過日数に対する膜間差圧を示すグラフである。4 is a graph showing transmembrane pressure versus elapsed days in Example 2 and Comparative Example 2. FIG.

本発明の実施の形態について以下説明する。本実施形態は本発明を実施する一例であって、本発明は本実施形態に限定されるものではない。 An embodiment of the present invention will be described below. This embodiment is an example of implementing the present invention, and the present invention is not limited to this embodiment.

本発明の実施形態に係る水処理装置の一例の概略を図１に示し、その構成について説明する。 An outline of an example of a water treatment apparatus according to an embodiment of the present invention is shown in FIG. 1, and its configuration will be described.

水処理装置１は、高分子有機物含有水を貯留する水槽１０と、水槽１０からの高分子有機物含有水を貯留する原水槽１２と、原水槽１２の水を循環しながら過酸化物を添加する過酸化物添加手段として、オゾン発生装置２４を備えるオゾン処理装置２２と、原水槽１２の水を膜ろ過処理する膜ろ過手段として、膜ろ過装置１４と、膜ろ過装置１４による膜ろ過処理で得られる膜ろ過水の過酸化物を分解処理する過酸化物分解手段として、活性炭処理装置１８とを備える。水処理装置１は、膜ろ過水槽１６と、処理水槽２０とを備えてもよい。 The water treatment apparatus 1 includes a water tank 10 for storing macromolecular organic matter-containing water, a raw water tank 12 for storing macromolecular organic matter-containing water from the water tank 10, and adding a peroxide while circulating the water in the raw water tank 12. Ozone treatment device 22 having ozone generator 24 as peroxide addition means, membrane filtration device 14 as membrane filtration means for membrane filtration of water in raw water tank 12, and membrane filtration treatment by membrane filtration device 14 An activated carbon treatment device 18 is provided as a peroxide decomposition means for decomposing peroxides in the membrane-filtered water. The water treatment apparatus 1 may include a membrane filtration water tank 16 and a treated water tank 20 .

図１の水処理装置１において、水槽１０の出口と原水槽１２の原水入口とがポンプ２６およびストレーナ３８を介して配管４０により接続され、原水槽１２の出口と膜ろ過装置１４の入口とがポンプ２８を介して配管４２により接続され、膜ろ過装置１４の透過水（膜ろ過水）出口と膜ろ過水槽１６の入口とが配管４４により接続され、膜ろ過水槽１６の出口と活性炭処理装置１８の入口とがポンプ３０を介して配管４６により接続され、活性炭処理装置１８の出口と処理水槽２０の入口とが配管４８により接続され、処理水槽２０の処理水出口と水槽１０とがポンプ３２を介して処理水返送配管５０により接続されている。処理水槽２０の逆洗水出口と膜ろ過装置１４の２次側の逆洗水入口とはポンプ３４を介して配管５８により接続されている。膜ろ過装置１４の１次側の濃縮水出口と原水槽１２の濃縮水入口とが濃縮水返送配管５６により接続されている。膜ろ過装置１４の濃縮水出口には、配管６６が接続されている。 In the water treatment apparatus 1 of FIG. 1, the outlet of the water tank 10 and the raw water inlet of the raw water tank 12 are connected by a pipe 40 via a pump 26 and a strainer 38, and the outlet of the raw water tank 12 and the inlet of the membrane filtration device 14 are connected. It is connected by a pipe 42 via a pump 28, the permeated water (membrane filtered water) outlet of the membrane filtration device 14 and the inlet of the membrane filtration water tank 16 are connected by a pipe 44, and the outlet of the membrane filtration water tank 16 and the activated carbon treatment device 18 are connected. is connected by a pipe 46 through a pump 30, the outlet of the activated carbon treatment device 18 and the inlet of the treated water tank 20 are connected by a pipe 48, and the treated water outlet of the treated water tank 20 and the water tank 10 are connected by the pump 32. It is connected by a treated water return pipe 50 via. A backwash water outlet of the treated water tank 20 and a backwash water inlet on the secondary side of the membrane filtration device 14 are connected by a pipe 58 via a pump 34 . A concentrated water outlet on the primary side of the membrane filtration device 14 and a concentrated water inlet of the raw water tank 12 are connected by a concentrated water return pipe 56 . A pipe 66 is connected to the concentrated water outlet of the membrane filtration device 14 .

原水槽１２の循環水出口とオゾン処理装置２２の循環水入口とが循環配管５２により接続され、オゾン処理装置２２の循環水出口と原水槽１２の循環水入口とが循環配管５４により接続されている。オゾン処理装置２２の下部にはオゾン発生装置２４が配管６０により接続されている。 The circulating water outlet of the raw water tank 12 and the circulating water inlet of the ozonizer 22 are connected by a circulating pipe 52, and the circulating water outlet of the ozonizer 22 and the circulating water inlet of the raw water tank 12 are connected by a circulating pipe 54. there is An ozone generator 24 is connected to the lower portion of the ozonizer 22 through a pipe 60 .

本実施形態に係る水処理方法および水処理装置１の動作について説明する。 The operation of the water treatment method and the water treatment apparatus 1 according to this embodiment will be described.

水槽１０において例えば魚類等の水中生物が飼育水中で飼育されている。飼育水には、水中生物の飼育に伴い、通常、タンパク質等の高分子有機物、懸濁物質等が含まれる。水槽１０内の飼育水、すなわち高分子有機物等を含む高分子有機物含有水は、ポンプ２６により配管４０を通して原水槽１２へ送液される。必要に応じて配管４０の途中にストレーナ３８を設置し、高分子有機物含有水中の比較的大きめの固形物が除去されてもよい。 In the water tank 10, aquatic organisms such as fish are reared in breeding water. Breeding water usually contains macromolecular organic matter such as proteins, suspended solids, and the like, accompanying the breeding of aquatic organisms. Breeding water in the water tank 10 , that is, high-molecular-weight organic substance-containing water containing high-molecular-weight organic substances and the like is sent to the raw water tank 12 through a pipe 40 by a pump 26 . If necessary, a strainer 38 may be installed in the middle of the pipe 40 to remove relatively large solids in the macromolecular organic substance-containing water.

原水槽１２の高分子有機物含有水の一部は、循環配管５２を通してオゾン処理装置２２へ送液される。オゾン処理装置２２には、オゾン発生装置２４で発生させたオゾンが配管６０を通して供給される。オゾン処理装置２２において、オゾンにより、高分子有機物含有水中の有機物の循環処理（ここでは主に有機物の分解処理）が行われる。また、オゾン処理装置２２において、オゾンを用いた加圧浮上により、濃縮された懸濁物質等が固液分離される。有機物処理が行われたオゾン処理水は、循環配管５４を通して原水槽１２に循環される。すなわち、水槽１０から原水槽１２へ送液された高分子有機物含有水を原水槽１２へ循環しながら過酸化物を添加する（過酸化物添加工程）。排オゾンは、配管６２を通して排出され、オゾン除去装置により処理されてもよい。オゾン処理装置２２において発生したスカム等は、配管６４を通して排出されてもよい。 A part of the high-molecular-weight organic substance-containing water in the raw water tank 12 is sent to the ozone treatment device 22 through the circulation pipe 52 . Ozone generated by an ozone generator 24 is supplied to the ozone treatment device 22 through a pipe 60 . In the ozonizer 22, the organic substances in the high-molecular-weight organic substance-containing water are circulated (mainly decomposed organic substances here) by ozone. In addition, in the ozone treatment device 22, the concentrated suspended solids and the like are separated into solid and liquid by pressurized flotation using ozone. The ozonated water that has undergone the organic substance treatment is circulated to the raw water tank 12 through the circulation pipe 54 . That is, the organic polymer-containing water sent from the water tank 10 to the raw water tank 12 is circulated to the raw water tank 12 while adding the peroxide (peroxide addition step). Exhaust ozone is discharged through line 62 and may be treated by an ozone remover. Scum and the like generated in the ozone treatment device 22 may be discharged through the pipe 64 .

一方で、原水槽１２中の原水は、ポンプ２８により配管４２を通して膜ろ過装置１４に送液される。膜ろ過装置１４において、原水中の残存した懸濁物質等が膜を用いてろ過されて除去される（膜ろ過工程）。膜ろ過工程で得られた濃縮水の少なくとも一部は、濃縮水返送配管５６を通して、原水槽１２に返送される（濃縮水返送工程）。濃縮水返送配管５６等が、濃縮水の少なくとも一部を原水槽１２に返送する濃縮水返送手段として機能する。濃縮水を原水槽１２に返送することで、懸濁物質の濃度が高くなり、オゾン処理装置２２における加圧浮上の効率を上げることができる。 On the other hand, the raw water in the raw water tank 12 is sent to the membrane filtration device 14 through the pipe 42 by the pump 28 . In the membrane filtration device 14, suspended solids and the like remaining in the raw water are filtered using a membrane and removed (membrane filtration step). At least part of the concentrated water obtained in the membrane filtration step is returned to the raw water tank 12 through the concentrated water return pipe 56 (concentrated water returning step). The concentrated water return pipe 56 and the like function as concentrated water return means for returning at least part of the concentrated water to the raw water tank 12 . By returning the concentrated water to the raw water tank 12, the concentration of suspended solids is increased, and the efficiency of pressurized flotation in the ozone treatment device 22 can be increased.

膜ろ過された膜ろ過水は、配管４４を通して必要に応じて膜ろ過水槽１６に貯留された後、ポンプ３０により配管４６を通して活性炭処理装置１８に供給される。活性炭処理装置１８において、膜ろ過水中の残オゾン等の過酸化物が活性炭により分解処理される（過酸化物分解工程）。 The membrane filtered water is stored in the membrane filtration water tank 16 as needed through the pipe 44 and then supplied to the activated carbon treatment device 18 through the pipe 46 by the pump 30 . In the activated carbon treatment device 18, peroxides such as residual ozone in the membrane-filtered water are decomposed by activated carbon (peroxide decomposition step).

残オゾン等の過酸化物が分解処理された処理水は、配管４８を通して必要に応じて処理水槽２０に貯留された後、処理水の少なくとも一部はポンプ３２により処理水返送配管５０を通して水槽１０に返送され、例えば飼育水として再利用されてもよい（処理水返送工程）。ポンプ３２および処理水返送配管５０等が、処理水の少なくとも一部を水槽１０に返送する処理水返送手段として機能する。処理水を水槽１０に返送して再利用することで、補給水や排水にかかるコストを削減することができる。 The treated water in which peroxides such as residual ozone have been decomposed is stored in the treated water tank 20 as necessary through the pipe 48. and may be reused, for example, as breeding water (treated water returning step). The pump 32 and the treated water return pipe 50 and the like function as treated water return means for returning at least part of the treated water to the water tank 10 . By returning the treated water to the water tank 10 and reusing it, it is possible to reduce the cost of replenishment water and drainage.

膜ろ過装置１４の洗浄が必要になった場合は、処理水の一部が逆洗水として処理水槽２０からポンプ３４により配管５８を通して膜ろ過装置１４の２次側から１次側に逆流されて、膜が洗浄されてもよい（逆洗工程）。逆洗排水は、配管６６を通して排出される。膜ろ過水槽１６の膜ろ過水が逆洗水として用いられてもよい。 When the membrane filtration device 14 needs to be washed, part of the treated water is backwashed from the treated water tank 20 by the pump 34 through the pipe 58 from the secondary side to the primary side of the membrane filtration device 14 as backwash water. , the membrane may be washed (backwash step). Backwash waste water is discharged through the pipe 66 . Membrane-filtered water in the membrane-filtered water tank 16 may be used as backwash water.

本実施形態に係る水処理装置１において、高分子有機物含有水を原水槽１２に貯留し、原水槽１２の水を循環して有機物処理を行い、原水槽１２の水を膜ろ過処理することにより、高分子有機物や生物等による膜のファウリングを抑制し、膜ろ過装置１４の安定した運転が可能となる。原水槽の水を循環して有機物処理を行うことによって、多段処理により有機物の効率的な分解が可能となる。逆洗工程中には、有機物の循環処理を行ってもよいし、停止してもよい。 In the water treatment apparatus 1 according to the present embodiment, water containing macromolecular organic substances is stored in the raw water tank 12, the water in the raw water tank 12 is circulated to perform organic matter treatment, and the water in the raw water tank 12 is subjected to membrane filtration treatment. , membrane fouling due to macromolecular organic substances, organisms, etc. is suppressed, and stable operation of the membrane filtration device 14 becomes possible. By circulating the water in the raw water tank and treating the organic matter, it becomes possible to efficiently decompose the organic matter through multistage treatment. During the backwashing process, the organic matter may be circulated or stopped.

高分子有機物とは、重量平均分子量が１０万～２００万の範囲の有機物である。重量平均分子量は、排水中に含まれる有機物の成分を把握する方法として、ＬＣ－ＯＣＤ（Ｌｉｑｕｉｄ Ｃｈｒｏｍａｔｏｇｒａｐｈｙ－Ｏｒｇａｎｉｃ Ｃａｒｂｏｎ Ｄｅｔｅｃｔｉｏｎ）装置（ＤＯＣ－ＬＡＢＯＲ社製、ｍｏｂｅｌ１２００７）を用いて、湿式酸化法（カラム：ＨＷ５０Ｓ）で測定することができる。ＬＣ－ＯＣＤとは、有機物を分子量毎に分け、それぞれの成分の有機物濃度を測定する方法である。ＬＣ－ＯＣＤの測定例として、ヒラメを飼育した飼育水の分析結果を図３に示す。図３に示すＬＣ－ＯＣＤスペクトルは、横軸の保持時間（ＲＴ：Ｒｅｔｅｎｔｉｏｎ Ｔｉｍｅ）［ｍｉｎ］が短いほど、有機物の分子量が大きいことを示すが、保持時間（ＲＴ）が２６～３４ｍｉｎ付近に検出されているピークが、重量平均分子量が１０万～２００万の範囲のタンパク質等の高分子有機物である。 A high-molecular-weight organic substance is an organic substance having a weight-average molecular weight in the range of 100,000 to 2,000,000. The weight-average molecular weight was determined by a wet oxidation method (column: HW50S). LC-OCD is a method of dividing organic matter by molecular weight and measuring the organic matter concentration of each component. As an example of LC-OCD measurement, FIG. 3 shows the analysis results of breeding water in which flounder was bred. The LC-OCD spectrum shown in FIG. 3 shows that the shorter the retention time (RT) [min] on the horizontal axis, the larger the molecular weight of the organic substance, but the retention time (RT) is detected around 26 to 34 min. The indicated peak is a macromolecular organic substance such as protein having a weight average molecular weight in the range of 100,000 to 2,000,000.

過酸化物添加手段としては、オゾン発生装置を備えるオゾン処理装置の他に、紫外線酸化処理装置等が挙げられる。処理性能等の観点から、オゾン発生装置を備えるオゾン処理装置が好ましい。過酸化物添加手段としては、オゾンを用いるオゾン処理装置であることが好ましく、オゾンマイクロバブルを用いるオゾン処理装置であることがより好ましい。 Examples of means for adding peroxide include an ozonizer equipped with an ozonizer, and an ultraviolet oxidation treatment device. From the viewpoint of treatment performance, etc., an ozonation apparatus equipped with an ozonizer is preferable. The peroxide adding means is preferably an ozone treatment apparatus using ozone, and more preferably an ozone treatment apparatus using ozone microbubbles.

オゾンマイクロバブルは、例えば、直径が１０μｍ～１００μｍ程度の、オゾンを含む微細なオゾン含有気泡である。オゾンマイクロバブルを用いるオゾン処理装置により、高分子有機物および懸濁物質を含む高分子有機物含有水に対して、オゾンを含む微細気泡であるオゾンマイクロバブルの表面に懸濁物質を疎水性吸着させ浮上分離させて除去するとともに、オゾンマイクロバブルによる有機物酸化効果が得られる。また、オゾンをマイクロバブルとして用いることで、オゾン処理装置２２の槽内にオゾンマイクロバブルを長時間保持することができるため、有機物との反応時間が増え、有機物の処理効果が飛躍的に向上すると考えられる。 Ozone microbubbles are fine ozone-containing bubbles having a diameter of, for example, about 10 μm to 100 μm. With an ozone treatment device that uses ozone microbubbles, suspended solids are hydrophobically adsorbed on the surface of ozone microbubbles, which are microbubbles containing ozone, in water containing high molecular weight organic substances and suspended solids. In addition to separating and removing, ozone microbubbles have the effect of oxidizing organic substances. In addition, by using ozone as microbubbles, the ozone microbubbles can be kept in the tank of the ozonizer 22 for a long time, which increases the reaction time with the organic matter, and dramatically improves the treatment effect of the organic matter. Conceivable.

膜ろ過装置１４としては、例えば、限外ろ過膜（ＵＦ膜）または精密ろ過膜（ＭＦ膜）等のろ過膜を有するものであればよく、特に制限はない。 The membrane filtration device 14 is not particularly limited as long as it has a filtration membrane such as an ultrafiltration membrane (UF membrane) or a microfiltration membrane (MF membrane).

膜ろ過水中の残オゾンの濃度が高く、水槽１０に返送されて生物の飼育等に影響を及ぼすことが懸念される場合は、膜ろ過装置１４の後段に活性炭処理装置１８等の過酸化物分解手段を設けることが好ましい。膜ろ過装置１４の後段に過酸化物分解手段を備えることにより、残オゾン等の過酸化物による生物の飼育等への影響を低減することができる。このため、原水が養殖や水族館等の飼育水等である場合に、処理水を水槽１０へ返送しても、生物への影響を低減することができる。 If the concentration of residual ozone in the membrane-filtered water is high and there is a concern that it will be returned to the water tank 10 and affect the breeding of organisms, etc., a peroxide decomposition device such as an activated carbon treatment device 18 may be installed after the membrane filtration device 14. Means are preferably provided. By providing the peroxide decomposing means in the latter stage of the membrane filtration device 14, it is possible to reduce the influence of peroxides such as residual ozone on the breeding of organisms. Therefore, when the raw water is breeding water for aquaculture or an aquarium, even if the treated water is returned to the water tank 10, the effect on organisms can be reduced.

過酸化物分解手段としては、活性炭を充填した活性炭充填塔等の活性炭処理装置の他に、Ｐｄ担持担体、酸化チタン、白金等の過酸化物分解触媒を充填した充填塔等が挙げられ、コスト等の観点から活性炭充填塔等の活性炭処理装置が好ましい。また、過酸化物分解触媒を充填した充填塔への通水方向は、下向流と上向流のどちらでもよいが、過酸化物の分解率を高めるためには下向流が好ましい。 As the peroxide decomposition means, in addition to activated carbon treatment equipment such as an activated carbon packed tower filled with activated carbon, a packed tower filled with a peroxide decomposition catalyst such as a Pd supporting carrier, titanium oxide, platinum, etc. can be mentioned. From these points of view, an activated carbon treatment apparatus such as an activated carbon packed tower is preferable. The direction of water flow to the packed tower packed with the peroxide decomposition catalyst may be either downward flow or upward flow, but downward flow is preferred in order to increase the peroxide decomposition rate.

図１の例では、処理水の全てが水槽１０に返送されて飼育水に添加されているが、処理水の少なくとも一部が水槽１０に返送されて飼育水に添加されればよく、処理水の一部が水槽１０に返送されて飼育水に添加されてもよいし、処理水の全てが水槽１０に返送されて飼育水に添加されてもよい。使用する水量を低減する等の観点から、処理水の一部が水槽１０に返送されることが好ましく、処理水の全てが水槽１０に返送されることがより好ましい。処理水の全てが水槽１０に返送される閉鎖循環系とすることにより、使用する水量を低減することができる等の利点がある。また、循環は、常時循環してもよいし、定期的に循環してもよい。通常は、水槽１０中の水質をできるだけ保つために、常時循環すればよい。 In the example of FIG. 1, all of the treated water is returned to the aquarium 10 and added to the breeding water, but at least part of the treated water may be returned to the aquarium 10 and added to the breeding water. A portion of the treated water may be returned to the aquarium 10 and added to the breeding water, or all of the treated water may be returned to the aquarium 10 and added to the breeding water. From the viewpoint of reducing the amount of water used, it is preferable that part of the treated water is returned to the water tank 10 , and it is more preferable that all of the treated water is returned to the water tank 10 . By forming a closed circulation system in which all of the treated water is returned to the water tank 10, there is an advantage that the amount of water used can be reduced. Moreover, the circulation may be always circulating or may be circulating periodically. Normally, in order to maintain the water quality in the water tank 10 as much as possible, constant circulation is sufficient.

本発明の実施形態に係る水処理装置の他の例の概略を図２に示し、その構成について説明する。 Another example of a water treatment apparatus according to an embodiment of the present invention is schematically shown in FIG. 2, and its configuration will be described.

水処理装置３は、高分子有機物含有水を貯留する水槽１０と、水槽１０からの高分子有機物含有水を貯留する原水槽１２と、原水槽１２の水を膜ろ過処理する膜ろ過手段として、膜ろ過装置１４と、膜ろ過装置１４による膜ろ過処理で得られる濃縮水に過酸化物を添加する過酸化物添加手段として、オゾン発生装置２４を備えるオゾン処理装置２２と、膜ろ過装置１４による膜ろ過処理で得られる膜ろ過水の過酸化物を分解処理する過酸化物分解手段として、活性炭処理装置１８とを備える。水処理装置１は、膜ろ過水槽１６と、処理水槽２０と、濃縮水槽６８とを備えてもよい。 The water treatment apparatus 3 includes a water tank 10 for storing high-molecular-weight organic substance-containing water, a raw water tank 12 for storing high-molecular-weight organic substance-containing water from the water tank 10, and membrane filtration means for performing membrane filtration on the water in the raw water tank 12, Membrane filtration device 14, ozonation device 22 provided with ozone generator 24 as peroxide addition means for adding peroxide to concentrated water obtained by membrane filtration treatment by membrane filtration device 14, and membrane filtration device 14 An activated carbon treatment device 18 is provided as a peroxide decomposition means for decomposing peroxides in the membrane-filtered water obtained in the membrane filtration process. The water treatment apparatus 1 may include a membrane filtration water tank 16 , a treated water tank 20 and a concentration water tank 68 .

図２の水処理装置３において、水槽１０の出口と原水槽１２の原水入口とが配管７４により接続され、原水槽１２の原水出口と膜ろ過装置１４の入口とがポンプ７０およびストレーナ３８を介して配管７６により接続され、膜ろ過装置１４の透過水（膜ろ過水）出口と膜ろ過水槽１６の入口とが配管４４により接続され、膜ろ過水槽１６の出口と活性炭処理装置１８の入口とがポンプ３０を介して配管４６により接続され、活性炭処理装置１８の出口と処理水槽２０の入口とが配管４８により接続され、処理水槽２０の処理水出口と水槽１０とがポンプ３２を介して処理水返送配管５０により接続されている。処理水槽２０の逆洗水出口と膜ろ過装置１４の２次側の逆洗水入口とはポンプ３４を介して配管５８により接続されている。 2, the outlet of the water tank 10 and the raw water inlet of the raw water tank 12 are connected by a pipe 74, and the raw water outlet of the raw water tank 12 and the inlet of the membrane filtration device 14 are connected via a pump 70 and a strainer 38. The permeated water (membrane filtered water) outlet of the membrane filtration device 14 and the inlet of the membrane filtration water tank 16 are connected by a pipe 44, and the outlet of the membrane filtration water tank 16 and the inlet of the activated carbon treatment device 18 are connected. The outlet of the activated carbon treatment device 18 and the inlet of the treated water tank 20 are connected by the pipe 48, and the treated water outlet of the treated water tank 20 and the water tank 10 are connected to each other via the pump 32. They are connected by return piping 50 . A backwash water outlet of the treated water tank 20 and a backwash water inlet on the secondary side of the membrane filtration device 14 are connected by a pipe 58 via a pump 34 .

膜ろ過装置１４の濃縮水出口と濃縮水槽６８の濃縮水入口とが配管８０により接続され、膜ろ過装置１４の逆洗排水出口と濃縮水槽６８の逆洗排水入口とが配管７８により接続され、濃縮水槽６８の出口とオゾン処理装置２２の入口とがポンプ７２を介して配管８２により接続され、オゾン処理装置２２の出口と原水槽１２の入口とが過酸化物含有水返送配管８４により接続されている。オゾン処理装置２２の下部にはオゾン発生装置２４が配管６０により接続されている。 The concentrated water outlet of the membrane filtration device 14 and the concentrated water inlet of the concentrated water tank 68 are connected by a pipe 80, the backwashing waste water outlet of the membrane filtration device 14 and the backwashing waste water inlet of the concentrated water tank 68 are connected by a pipe 78, The outlet of the concentrated water tank 68 and the inlet of the ozonizer 22 are connected by a pipe 82 via a pump 72, and the outlet of the ozonizer 22 and the inlet of the raw water tank 12 are connected by a peroxide-containing water return pipe 84. ing. An ozone generator 24 is connected to the lower portion of the ozonizer 22 through a pipe 60 .

本実施形態に係る水処理方法および水処理装置３の動作について説明する。 The operation of the water treatment method and the water treatment device 3 according to this embodiment will be described.

水槽１０において例えば魚類等の水中生物が飼育水中で飼育されている。飼育水には、水中生物の飼育に伴い、通常、タンパク質等の高分子有機物、懸濁物質等が含まれる。水槽１０内の飼育水、すなわち高分子有機物等を含む高分子有機物含有水は、配管７４を通して原水槽１２へ送液される。高分子有機物含有水は、原水槽１２において、後述する過酸化物を添加した過酸化物含有水と混合された後、混合水としてポンプ７０により配管７６を通して膜ろ過装置１４に送液される。必要に応じて配管７６の途中にストレーナ３８を設置し、高分子有機物含有水中の比較的大きめの固形物が除去されてもよい。 In the water tank 10, aquatic organisms such as fish are reared in breeding water. Breeding water usually contains macromolecular organic matter such as proteins, suspended solids, and the like, accompanying the breeding of aquatic organisms. Breeding water in the water tank 10 , that is, macromolecular organic substance-containing water containing macromolecular organic substances and the like is sent to the raw water tank 12 through a pipe 74 . The polymer organic substance-containing water is mixed with peroxide-containing water to which a peroxide is added, which will be described later, in the raw water tank 12 , and then sent as mixed water to the membrane filtration device 14 through a pipe 76 by a pump 70 . If necessary, a strainer 38 may be installed in the middle of the pipe 76 to remove relatively large solids in the macromolecular organic substance-containing water.

膜ろ過装置１４において、原水中の残存した懸濁物質等が膜を用いてろ過されて除去される（膜ろ過工程）。 In the membrane filtration device 14, suspended solids and the like remaining in the raw water are filtered using a membrane and removed (membrane filtration step).

膜ろ過された膜ろ過水は、配管４４を通して必要に応じて膜ろ過水槽１６に貯留された後、ポンプ３０により配管４６を通して活性炭処理装置１８に供給される。活性炭処理装置１８において、膜ろ過水中の残オゾン等の過酸化物が活性炭により分解処理される（過酸化物分解工程）。 The membrane filtered water is stored in the membrane filtration water tank 16 as needed through the pipe 44 and then supplied to the activated carbon treatment device 18 through the pipe 46 by the pump 30 . In the activated carbon treatment device 18, peroxides such as residual ozone in the membrane-filtered water are decomposed by activated carbon (peroxide decomposition step).

残オゾン等の過酸化物が分解処理された処理水は、配管４８を通して必要に応じて処理水槽２０に貯留された後、処理水の少なくとも一部はポンプ３２により処理水返送配管５０を通して水槽１０に返送され、例えば飼育水として再利用されてもよい（処理水返送工程）。ポンプ３２および処理水返送配管５０等が、処理水の少なくとも一部を水槽１０に返送する処理水返送手段として機能する。処理水を水槽１０に返送して再利用することで、補給水や排水にかかるコストを削減することができる。 The treated water in which peroxides such as residual ozone have been decomposed is stored in the treated water tank 20 as necessary through the pipe 48. and may be reused, for example, as breeding water (treated water returning step). The pump 32 and the treated water return pipe 50 and the like function as treated water return means for returning at least part of the treated water to the water tank 10 . By returning the treated water to the water tank 10 and reusing it, it is possible to reduce the cost of replenishment water and drainage.

膜ろ過装置１４の洗浄が必要になった場合は、処理水の一部が逆洗水として処理水槽２０からポンプ３４により配管５８を通して膜ろ過装置１４の２次側から１次側に逆流されて、膜が洗浄されてもよい（逆洗工程）。逆洗排水は、配管７８を通して濃縮水槽６８に供給され、膜ろ過装置１４からの濃縮水と混合される。膜ろ過水槽１６の膜ろ過水が逆洗水として用いられてもよい。 When the membrane filtration device 14 needs to be washed, part of the treated water is backwashed from the treated water tank 20 by the pump 34 through the pipe 58 from the secondary side to the primary side of the membrane filtration device 14 as backwash water. , the membrane may be washed (backwash step). The backwash wastewater is supplied to the concentrated water tank 68 through the pipe 78 and mixed with the concentrated water from the membrane filtration device 14 . Membrane-filtered water in the membrane-filtered water tank 16 may be used as backwash water.

膜ろ過装置１４の濃縮水は、配管８０を通して必要に応じて濃縮水槽６８に貯留された後、ポンプ７２により配管８２を通してオゾン処理装置２２に供給される。 The concentrated water of the membrane filtration device 14 is stored in the concentrated water tank 68 through the pipe 80 as necessary, and then supplied to the ozone treatment device 22 through the pipe 82 by the pump 72 .

オゾン処理装置２２には、一方で、オゾン発生装置２４で発生させたオゾンが配管６０を通して供給される。オゾン処理装置２２において、オゾンにより、濃縮水中の有機物の処理（ここでは主に有機物の分解処理）が行われる。また、オゾン処理装置２２において、オゾンを用いた加圧浮上により、濃縮された懸濁物質等が固液分離される。有機物処理が行われたオゾン処理水は、過酸化物含有水返送配管８４を通して原水槽１２に返送される。すなわち、膜ろ過工程による膜ろ過処理で得られる濃縮水に過酸化物が添加され（過酸化物添加工程）、過酸化物添加工程により得られる過酸化物含有水の少なくとも一部が原水槽１２に返送される（過酸化物含有水返送工程）。過酸化物含有水返送配管８４等が、過酸化物含有水の少なくとも一部を原水槽１２に返送する過酸化物含有水返送手段として機能する。過酸化物含有水を原水槽１２に返送することで、膜ろ過装置１４の膜に過酸化物含有水が接触し、ファウリングを抑制することができる。排オゾンは、配管６２を通して排出され、オゾン除去装置により処理されてもよい。オゾン処理装置２２において発生したスカム等は、配管６４を通して排出されてもよい。 On the other hand, ozone generated by an ozone generator 24 is supplied to the ozone treatment device 22 through a pipe 60 . In the ozonizer 22, the organic matter in the concentrated water is treated (mainly the organic matter is decomposed here) with ozone. In addition, in the ozone treatment device 22, the concentrated suspended solids and the like are separated into solid and liquid by pressurized flotation using ozone. The ozonated water that has undergone the organic substance treatment is returned to the raw water tank 12 through the peroxide-containing water return pipe 84 . That is, a peroxide is added to the concentrated water obtained by the membrane filtration process in the membrane filtration process (peroxide addition process), and at least part of the peroxide-containing water obtained by the peroxide addition process is the raw water tank 12 (peroxide-containing water return step). The peroxide-containing water return pipe 84 and the like function as a peroxide-containing water returning means for returning at least part of the peroxide-containing water to the raw water tank 12 . By returning the peroxide-containing water to the raw water tank 12, the peroxide-containing water comes into contact with the membrane of the membrane filtration device 14, and fouling can be suppressed. Exhaust ozone is discharged through line 62 and may be treated by an ozone remover. Scum and the like generated in the ozone treatment device 22 may be discharged through the pipe 64 .

本実施形態に係る水処理装置３において、高分子有機物含有水を原水槽１２に貯留し、原水槽１２の水を膜ろ過処理し、膜ろ過処理で得られる濃縮水について有機物処理を行い、原水槽１２に返送することにより、高分子有機物や生物等による膜のファウリングを抑制し、膜ろ過装置１４の安定した運転が可能となる。また、膜ろ過装置１４の膜によって懸濁物質が濃縮され、オゾン処理装置２２における加圧浮上の効率を上げることができる。 In the water treatment apparatus 3 according to the present embodiment, water containing macromolecular organic substances is stored in the raw water tank 12, the water in the raw water tank 12 is subjected to membrane filtration, and the concentrated water obtained by the membrane filtration is subjected to organic matter treatment. By returning the water to the water tank 12, fouling of the membrane due to macromolecular organic substances, organisms, etc. is suppressed, and stable operation of the membrane filtration device 14 becomes possible. In addition, suspended solids are concentrated by the membrane of the membrane filtration device 14, and the efficiency of pressurized levitation in the ozone treatment device 22 can be increased.

本実施形態に係る水処理装置および水処理方法は、例えば、水族館や養殖等、水中生物を飼育する際に用いられる飼育水等の処理に適用され、飼育水は海水であっても、淡水であってもよい。水族館や養殖のような水中生物を飼育する過程で生じる、タンパク質等の高分子有機物を含む高分子有機物含有水の処理に好適に適用される。生物を飼育する場合、給餌等の要因により飼育水中の有機物濃度が変動する（例えば、±０．５～１０ｍｇ／Ｌ）特徴がある。特に、水族館や養殖のような水中生物を飼育する過程で生じる、タンパク質等の高分子有機物を含む海水の処理に適しており、魚類等の水中生物の養殖や水族館等の魚類等の水中生物の飼育水処理に用いられる閉鎖系循環処理により適している。すなわち、本実施形態に係る水処理装置は、水中生物の飼育水の製造装置または処理装置として、好適に用いることができる。 The water treatment apparatus and water treatment method according to the present embodiment are applied, for example, to treatment of breeding water used for breeding aquatic organisms such as aquariums and aquaculture, and the breeding water may be seawater or freshwater. There may be. It is suitably applied to the treatment of water containing macromolecular organic substances containing macromolecular organic substances such as proteins, which is generated in the process of breeding aquatic organisms such as in aquariums and aquaculture. When living organisms are reared, the concentration of organic matter in the rearing water fluctuates (for example, ±0.5 to 10 mg/L) due to factors such as feeding. In particular, it is suitable for treating seawater containing macromolecular organic matter such as protein that is generated in the process of breeding aquatic organisms such as aquariums and aquaculture. It is more suitable for closed system circulation treatment used for breeding water treatment. That is, the water treatment apparatus according to this embodiment can be suitably used as a production apparatus or treatment apparatus for breeding water for aquatic organisms.

高分子有機物含有水中の高分子有機物の濃度は、例えば、０．１～５ｍｇ／Ｌの範囲である。高分子有機物含有水中の懸濁物質の濃度は、例えば、１０～１００ｍｇ／Ｌの範囲である。 The concentration of the macromolecular organic substance in the macromolecular organic substance-containing water is, for example, in the range of 0.1 to 5 mg/L. The concentration of suspended solids in the high-molecular-weight organic matter-containing water is, for example, in the range of 10 to 100 mg/L.

以下、実施例および比較例を挙げ、本発明をより具体的に詳細に説明するが、本発明は、以下の実施例に限定されるものではない。 EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples, but the present invention is not limited to the following examples.

＜実施例１、比較例１＞
実施例１では、図１に示す水処理装置１を用いて、魚の飼育水について、膜間差圧を測定した。比較例１では、オゾン処理装置およびオゾン発生装置を除いた水処理装置を用いて、膜間差圧を測定した。実施例１の実験条件を表１、比較例１の実験条件を表２に示す。結果を図４に示す。 <Example 1, Comparative Example 1>
In Example 1, the transmembrane pressure difference was measured for fish breeding water using the water treatment apparatus 1 shown in FIG. In Comparative Example 1, the transmembrane pressure difference was measured using a water treatment apparatus excluding the ozone treatment apparatus and the ozone generator. The experimental conditions of Example 1 are shown in Table 1, and the experimental conditions of Comparative Example 1 are shown in Table 2. The results are shown in FIG.

Figure 0007202796000001
Figure 0007202796000001

Figure 0007202796000002
Figure 0007202796000002

＜実施例２、比較例２＞
実施例２では、図２に示す水処理装置３を用いて、魚の飼育水について、膜間差圧を測定した。比較例２では、オゾン処理装置およびオゾン発生装置を除いた水処理装置を用いて、膜間差圧を測定した。実施例２の実験条件を表３、比較例２の実験条件を表４に示す。結果を図５に示す。 <Example 2, Comparative Example 2>
In Example 2, the transmembrane pressure difference was measured for fish breeding water using the water treatment apparatus 3 shown in FIG. In Comparative Example 2, the transmembrane pressure difference was measured using a water treatment apparatus excluding the ozone treatment apparatus and the ozone generator. The experimental conditions of Example 2 are shown in Table 3, and the experimental conditions of Comparative Example 2 are shown in Table 4. The results are shown in FIG.

Figure 0007202796000003
Figure 0007202796000003

Figure 0007202796000004
Figure 0007202796000004

実施例では、魚の飼育水等の高分子有機物含有水を処理する水処理装置および水処理方法において、膜のファウリングを抑制し、安定した運転が可能となった。 In the examples, membrane fouling was suppressed and stable operation became possible in a water treatment apparatus and a water treatment method for treating water containing macromolecular organic substances such as water for breeding fish.

１，３ 水処理装置、１０ 水槽、１２ 原水槽、１４ 膜ろ過装置、１６ 膜ろ過水槽、１８ 活性炭処理装置、２０ 処理水槽、２２ オゾン処理装置、２４ オゾン発生装置、２６，２８，３０，３２，３４，７０，７２ ポンプ、３８ ストレーナ、４０，４２，４４，４６，４８，５８，６０，６２，６４，６６，７４，７６，７８，８０，８２ 配管、５０ 処理水返送配管、５２，５４ 循環配管、５６ 濃縮水返送配管、６８ 濃縮水槽、８４ 過酸化物含有水返送配管。 1,3 water treatment equipment 10 water tank 12 raw water tank 14 membrane filtration equipment 16 membrane filtration water tank 18 activated carbon treatment equipment 20 treated water tank 22 ozone treatment equipment 24 ozone generator 26,28,30,32 , 34, 70, 72 pump, 38 strainer, 40, 42, 44, 46, 48, 58, 60, 62, 64, 66, 74, 76, 78, 80, 82 piping, 50 treated water return piping, 52, 54 circulation pipe, 56 concentrated water return pipe, 68 concentrated water tank, 84 peroxide-containing water return pipe.

Claims (6)

高分子有機物を含む、水中生物の飼育水を処理する水処理装置であって、
飼育水を貯留する水槽と、
前記水槽からの前記飼育水を貯留する原水槽と、
前記原水槽の水を循環しながら過酸化物を添加する過酸化物添加手段と、
前記原水槽の水を膜ろ過処理する膜ろ過手段と、
前記膜ろ過手段による膜ろ過処理で得られる濃縮水の少なくとも一部を前記原水槽に返送する濃縮水返送手段と、
前記膜ろ過手段による膜ろ過処理で得られる膜ろ過水の過酸化物を分解処理する過酸化物分解手段と、
前記過酸化物分解手段により分解処理した処理水の少なくとも一部を前記水槽に返送する処理水返送手段と、
を備えることを特徴とする水処理装置。 A water treatment apparatus for treating breeding water for aquatic organisms containing macromolecular organic matter,
a water tank for storing breeding water;
a raw water tank for storing the breeding water from the water tank;
a peroxide adding means for adding a peroxide while circulating the water in the raw water tank;
Membrane filtration means for performing membrane filtration on the water in the raw water tank;
Concentrated water returning means for returning at least part of the concentrated water obtained in the membrane filtration process by the membrane filtration means to the raw water tank;
a peroxide decomposition means for decomposing the peroxide of the membrane-filtered water obtained in the membrane filtration process by the membrane filtration means;
a treated water return means for returning at least part of the treated water decomposed by the peroxide decomposition means to the water tank;
A water treatment device comprising: 高分子有機物を含む、水中生物の飼育水を処理する水処理装置であって、
飼育水を貯留する水槽と、
前記水槽からの前記飼育水を貯留する原水槽と、
前記原水槽の水を膜ろ過処理する膜ろ過手段と、
前記膜ろ過手段による膜ろ過処理で得られる濃縮水に過酸化物を添加する過酸化物添加手段と、
前記過酸化物添加手段により得られる過酸化物含有水の少なくとも一部を前記原水槽に返送する過酸化物含有水返送手段と、
前記膜ろ過手段による膜ろ過処理で得られる膜ろ過水の過酸化物を分解処理する過酸化物分解手段と、
前記過酸化物分解手段により分解処理した処理水の少なくとも一部を前記水槽に返送する処理水返送手段と、
を備えることを特徴とする水処理装置。 A water treatment apparatus for treating breeding water for aquatic organisms containing macromolecular organic matter,
a water tank for storing breeding water;
a raw water tank for storing the breeding water from the water tank;
Membrane filtration means for performing membrane filtration on the water in the raw water tank;
a peroxide addition means for adding a peroxide to the concentrated water obtained by the membrane filtration treatment by the membrane filtration means;
a peroxide-containing water returning means for returning at least part of the peroxide-containing water obtained by the peroxide adding means to the raw water tank;
a peroxide decomposition means for decomposing the peroxide of the membrane-filtered water obtained in the membrane filtration process by the membrane filtration means;
a treated water return means for returning at least part of the treated water decomposed by the peroxide decomposition means to the water tank;
A water treatment device comprising: 請求項１または２に記載の水処理装置であって、
前記過酸化物添加手段が、オゾンを用いる手段であることを特徴とする水処理装置。 The water treatment device according to claim 1 or 2,
A water treatment apparatus, wherein the peroxide adding means is a means using ozone. 高分子有機物を含む、水中生物の飼育水を処理する水処理方法であって、
水槽から原水槽へ送液された飼育水を前記原水槽へ循環しながら過酸化物を添加する過酸化物添加工程と、
前記原水槽の水を膜ろ過処理する膜ろ過工程と、
前記膜ろ過工程による膜ろ過処理で得られる濃縮水の少なくとも一部を前記原水槽に返送する濃縮水返送工程と、
前記膜ろ過工程による膜ろ過処理で得られる膜ろ過水の過酸化物を分解処理する過酸化物分解工程と、
前記過酸化物分解工程により分解処理した処理水の少なくとも一部を前記水槽に返送する処理水返送工程と、
を含むことを特徴とする水処理方法。 A water treatment method for treating breeding water for aquatic organisms containing macromolecular organic matter,
a peroxide addition step of adding peroxide while circulating breeding water sent from a water tank to a raw water tank to the raw water tank;
A membrane filtration step of performing membrane filtration on the water in the raw water tank;
A concentrated water returning step of returning at least part of the concentrated water obtained in the membrane filtration process by the membrane filtration step to the raw water tank;
a peroxide decomposition step of decomposing the peroxide of the membrane filtered water obtained in the membrane filtration treatment by the membrane filtration step;
a treated water returning step of returning at least part of the treated water decomposed in the peroxide decomposition step to the water tank;
A water treatment method comprising: 高分子有機物を含む、水中生物の飼育水を処理する水処理方法であって、
水槽から原水槽へ送液された飼育水を膜ろ過処理する膜ろ過工程と、
前記膜ろ過工程による膜ろ過処理で得られる濃縮水に過酸化物を添加する過酸化物添加工程と、
前記過酸化物添加工程により得られる過酸化物含有水の少なくとも一部を前記原水槽に返送する過酸化物含有水返送工程と、
前記膜ろ過工程による膜ろ過処理で得られる膜ろ過水の過酸化物を分解処理する過酸化物分解工程と、
前記過酸化物分解工程により分解処理した処理水の少なくとも一部を前記水槽に返送する処理水返送工程と、
を含むことを特徴とする水処理方法。 A water treatment method for treating breeding water for aquatic organisms containing macromolecular organic matter,
a membrane filtration process for membrane filtration of the breeding water sent from the water tank to the raw water tank;
A peroxide addition step of adding a peroxide to the concentrated water obtained by the membrane filtration process in the membrane filtration step;
a peroxide-containing water returning step of returning at least part of the peroxide-containing water obtained in the peroxide adding step to the raw water tank;
a peroxide decomposition step of decomposing the peroxide of the membrane filtered water obtained in the membrane filtration treatment by the membrane filtration step;
a treated water returning step of returning at least part of the treated water decomposed in the peroxide decomposition step to the water tank;
A water treatment method comprising: 請求項４または５に記載の水処理方法であって、
前記過酸化物添加工程が、オゾンを用いる工程であることを特徴とする水処理方法。 The water treatment method according to claim 4 or 5,
The water treatment method, wherein the peroxide adding step is a step using ozone.
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