JP3316487B2 - Aquatic breeding water purification system - Google Patents
Aquatic breeding water purification systemInfo
- Publication number
- JP3316487B2 JP3316487B2 JP34350499A JP34350499A JP3316487B2 JP 3316487 B2 JP3316487 B2 JP 3316487B2 JP 34350499 A JP34350499 A JP 34350499A JP 34350499 A JP34350499 A JP 34350499A JP 3316487 B2 JP3316487 B2 JP 3316487B2
- Authority
- JP
- Japan
- Prior art keywords
- tank
- breeding water
- purification system
- denitrification
- breeding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 78
- 238000009395 breeding Methods 0.000 title claims description 65
- 230000001488 breeding effect Effects 0.000 title claims description 65
- 238000000746 purification Methods 0.000 title claims description 51
- 241000894006 Bacteria Species 0.000 claims description 33
- 239000006260 foam Substances 0.000 claims description 32
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 23
- 238000000926 separation method Methods 0.000 claims description 23
- 238000001914 filtration Methods 0.000 claims description 22
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 claims description 21
- 230000001546 nitrifying effect Effects 0.000 claims description 13
- 239000005416 organic matter Substances 0.000 claims description 13
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 13
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 12
- 239000000126 substance Substances 0.000 description 10
- 238000011001 backwashing Methods 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 229910021529 ammonia Inorganic materials 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 5
- 102000004190 Enzymes Human genes 0.000 description 4
- 108090000790 Enzymes Proteins 0.000 description 4
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 4
- 230000002411 adverse Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000011942 biocatalyst Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 238000009287 sand filtration Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000011085 pressure filtration Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 2
- 241000605122 Nitrosomonas Species 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000010406 cathode material Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000029142 excretion Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 230000003100 immobilizing effect Effects 0.000 description 2
- 239000004310 lactic acid Substances 0.000 description 2
- 235000014655 lactic acid Nutrition 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- -1 nitrate ions Chemical class 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 231100000419 toxicity Toxicity 0.000 description 2
- 230000001988 toxicity Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 241000192041 Micrococcus Species 0.000 description 1
- 241000605159 Nitrobacter Species 0.000 description 1
- 241001148162 Nitrobacter sp. Species 0.000 description 1
- 241000143395 Nitrosomonas sp. Species 0.000 description 1
- 241000589597 Paracoccus denitrificans Species 0.000 description 1
- 241000168053 Pseudomonas denitrificans (nomen rejiciendum) Species 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000008239 natural water Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 150000002826 nitrites Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 230000000384 rearing effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
Landscapes
- Farming Of Fish And Shellfish (AREA)
- Physical Water Treatments (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、水族館、養殖場、
実験施設における水棲生物の飼育水を浄化するためのシ
ステムに関する。より具体的には、水棲生物に影響を与
えずに、前記飼育水中の硝酸態窒素を除去する手段を備
え、且つアンモニア除去能力、有機物分解能力に優れ、
サイズが小さな浄化システムに関する。The present invention relates to an aquarium, a farm,
The present invention relates to a system for purifying breeding water of aquatic organisms in an experimental facility. More specifically, a means for removing nitrate nitrogen in the breeding water without affecting aquatic organisms, and having excellent ammonia removal ability and organic matter decomposition ability,
It relates to a small size purification system.
【０００２】[0002]
【従来の技術】水棲生物の飼育水には、餌の食べ残し、
水棲生物の老廃物（剥離したウロコ等）や排泄物を含む
有機物や魚の排泄物として発生するアンモニア等の有害
物質が絶えず大量に放出されるので、水族館の水槽等の
閉鎖された空間で水棲生物を飼育するためには、飼育水
を清浄に保つための浄化システムが不可欠である。2. Description of the Related Art In breeding water for aquatic organisms, food is left uneaten,
Since a large amount of harmful substances such as waste products of aquatic organisms (exfoliated scales) and organic matters including excreta and ammonia generated as excretion of fish are constantly released in large quantities, aquatic organisms are closed in a closed space such as an aquarium tank. In order to keep the breeding water, a purification system to keep the breeding water clean is indispensable.
【０００３】このような浄化システムとして最も一般的
に用いられているのは、砂濾過槽を備えた浄化システム
である。該浄化システムにおいて、濾過槽は飼育水中の
ss(suspended solid；自然水中に懸濁している固形物)
を除去する機能を有し、かつ砂表面に棲息した硝化菌に
よって水棲生物に対して極めて強い毒性を示すアンモニ
ア態窒素及び亜硝酸態窒素を酸化して硝酸態窒素に変換
する機能を有している。[0003] The most commonly used purification system is a purification system provided with a sand filter tank. In the purification system, the filtration tank is provided in the rearing water.
ss (suspended solid; solid suspended in natural water)
It has the function of removing ammonia, and the function of oxidizing ammonia nitrogen and nitrite nitrogen, which have extremely strong toxicity to aquatic organisms by nitrifying bacteria inhabiting the sand surface, and converting them to nitrate nitrogen. I have.
【０００４】しかしながら、かかる浄化システムでは、
アンモニア態窒素と亜硝酸態窒素を除去することはでき
るが、アンモニア及び亜硝酸の酸化によって生じた硝酸
態窒素を全く除去し得ない。硝酸態窒素は、アンモニア
態窒素や亜硝酸態窒素のような強い毒性は有していない
が、硝酸態窒素は強酸性であるために、水槽中に100〜2
00ppm以上の高い濃度で蓄積すると飼育水のpHの低下は
無視できないものとなる。However, in such a purification system,
Although ammonia nitrogen and nitrite nitrogen can be removed, nitrate nitrogen generated by oxidation of ammonia and nitrite cannot be removed at all. Nitrate nitrogen does not have strong toxicity like ammonia nitrogen or nitrite nitrogen, but since nitrate nitrogen is strongly acidic,
When accumulated at a high concentration of 00 ppm or more, a decrease in the pH of the breeding water becomes not negligible.
【０００５】このため、一般的な浄化システムを用いる
と、飼育水中に硝酸態窒素が蓄積するため飼育水の交換
が必要となり、大量の水交換という多大な労力を要する
操作が不可欠であるのみならず、水資源の浪費も避けら
れない。[0005] Therefore, if a general purification system is used, nitrate nitrogen accumulates in the breeding water, so that the breeding water needs to be replaced. Waste of water resources is inevitable.
【０００６】従来技術に存するかかる欠点を解消するに
は、飼育水から硝酸態窒素を除去するために、硝化槽に
加えて、硝酸態窒素を窒素分子に還元するための脱窒槽
を配設することが考えられる。[0006] In order to eliminate such disadvantages in the prior art, in order to remove nitrate nitrogen from breeding water, a denitrification tank for reducing nitrate nitrogen to nitrogen molecules is provided in addition to a nitrification tank. It is possible.
【０００７】しかしながら、現在、産業廃水処理等で用
いられている脱窒法では、硝酸イオン等に電子を供与す
る還元剤としてメタノールやグルコース、及びその代謝
物（乳酸等）を添加しなければならないので、運転コス
トが高くなるのみならず、水棲生物に悪影響を及ぼすこ
とが不可避となる。However, in the denitrification method currently used in industrial wastewater treatment and the like, methanol, glucose, and metabolites thereof (lactic acid, etc.) must be added as a reducing agent for donating electrons to nitrate ions and the like. This not only increases operating costs but also inevitably adversely affects aquatic organisms.
【０００８】このため、脱窒槽を備えた水棲生物飼育水
浄化システムは、現在知られていない。For this reason, an aquatic breeding water purification system equipped with a denitrification tank is not known at present.
【０００９】また、従来の浄化システムにおいては、濾
過槽として砂濾過槽又は圧力濾過槽を用いているため、
システムのメンテナンスとして、濾過槽の逆洗を行う必
要がある。さらに、砂濾過槽又は圧力濾過槽を用いる
と、逆洗工程用の装置を浄化システムに備えることが必
要となるので、システムのサイズが大型化するという欠
点も有している。In the conventional purification system, a sand filtration tank or a pressure filtration tank is used as a filtration tank.
As a maintenance of the system, it is necessary to backwash the filtration tank. Further, when a sand filtration tank or a pressure filtration tank is used, it is necessary to provide a device for the backwashing step in the purification system, and thus there is a disadvantage that the size of the system is increased.
【００１０】加えて、従来の浄化システムには、有機物
分解能力、及び低温でのアンモニア分解能力にも改良す
べき点が存していた。[0010] In addition, the conventional purification system has a point that the ability to decompose organic substances and the ability to decompose ammonia at low temperatures must be improved.
【００１１】[0011]
【発明が解決しようとする課題】本発明は、従来技術に
存する前記課題を解決するためになされたものであり、
逆洗工程が不要な濾過槽、水棲生物に悪影響を与えずに
脱窒反応を行い得る脱窒槽とを備えた水棲生物飼育水浄
化システムを提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems in the prior art,
It is an object of the present invention to provide an aquatic organism breeding water purification system including a filtration tank that does not require a backwashing step and a denitrification tank that can perform a denitrification reaction without adversely affecting aquatic organisms.
【００１２】本発明は、このような濾過槽及び脱窒槽に
加えて、低温での硝化能力に優れた硝化菌が収容された
硝化槽、及び飼育水中の有機物を分解するためのオゾン
発生器を備えた水棲生物飼育水浄化システムを提供する
ことも目的とする。The present invention provides, in addition to such a filtration tank and a denitrification tank, a nitrification tank containing nitrifying bacteria having excellent nitrification ability at low temperatures, and an ozone generator for decomposing organic substances in breeding water. It is another object of the present invention to provide a water purification system for raising aquatic organisms provided with the system.
【００１３】[0013]
【課題を解決するための手段】上記課題を解決するため
に、本発明は、飼育槽中の飼育水に含まれる有機物及び
ssを除去するための泡沫分離装置と、前記飼育水中のア
ンモニア態窒素を硝酸態窒素に変換するための硝化槽
と、バイオエレクトロ脱窒法によって、前記飼育水に含
まれる硝酸態窒素を除去するための脱窒槽と、を備えた
ことを特徴とする水棲生物飼育水浄化システムを提供す
る。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention relates to an organic matter contained in breeding water in a breeding tank, and
a foam separation device for removing ss, a nitrification tank for converting ammonium nitrogen in the breeding water to nitrate nitrogen, and a method for removing nitrate nitrogen contained in the breeding water by a bioelectrodenitrification method. And a denitrification tank for the aquatic organisms.
【００１４】ここで、「泡沫分離装置」とは、飼育水と
気泡を激しく接触させることにより発生した微細な泡沫
に汚物やタンパク質などを付着せしめることにより液体
中の汚物及び有機物を除去する装置を意味する。[0014] Here, the "foam separation device" is a device for removing dirt and organic matter in a liquid by causing dirt and proteins to adhere to fine foam generated by vigorously contacting breeding water with air bubbles. means.
【００１５】また、「バイオエレクトロ脱窒法」とは、
陰極用材料又は該材料と電気的に接続された導電性材料
に細菌等の生体触媒が固定化された電極を通電すること
により、前記生体触媒に電子又は電子供与体（例えば、
水素）を供給し、水中に存在する酸化態窒素を還元処理
する方法を意味する。[0015] The "bio-electro denitrification method"
By passing an electrode on which a biocatalyst such as bacteria is immobilized to a cathode material or a conductive material electrically connected to the material, an electron or an electron donor (for example,
Hydrogen) to reduce the oxidized nitrogen present in the water.
【００１６】「泡沫分離装置」及び「バイオエレクトロ
脱窒法」自体は公知である。"Foam separation apparatus" and "bioelectro denitrification method" are known per se.
【００１７】[0017]
【発明の実施の形態】本発明は、飼育槽中の水棲生物に
悪影響を与えずに脱窒反応を行い得る脱窒槽と、逆洗が
不要な濾過槽である泡沫分離装置を備えた水棲生物飼育
水浄化システムを提供する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an aquatic organism provided with a denitrification tank capable of performing a denitrification reaction without adversely affecting aquatic organisms in a breeding tank, and a foam separation device which is a filtration tank that does not require backwashing. Provide a breeding water purification system.
【００１８】本発明は、このような濾過槽及び脱窒槽に
加えて、低温での硝化能力に優れた硝化菌が収容された
硝化槽、及び飼育水中の有機物を分解するためのオゾン
発生器を備えた水棲生物飼育水浄化システムも提供す
る。The present invention provides, in addition to such a filtration tank and a denitrification tank, a nitrification tank containing nitrifying bacteria having excellent nitrification ability at low temperatures, and an ozone generator for decomposing organic substances in breeding water. Also provided is an aquatic breeding water purification system equipped.
【００１９】本発明の浄化システムは、バイオエレクト
ロ法（以下BE法と称する）によって脱窒を行い得る脱窒
槽を備えているため、飼育水中の有機物のみで脱窒が可
能となり、還元剤を添加する必要がないか、添加するに
してもごく少量で良い。Since the purification system of the present invention is provided with a denitrification tank capable of performing denitrification by a bioelectro method (hereinafter referred to as BE method), denitrification can be performed only by organic matter in the breeding water, and a reducing agent is added. There is no need to do this, or even a very small amount may be added.
【００２０】以下、実施例によって本発明を詳細に説明
するが、これらの実施例は、いかなる意味においても本
発明の範囲を限定することを意図するものではない。Hereinafter, the present invention will be described in detail with reference to examples. However, these examples are not intended to limit the scope of the present invention in any way.
【００２１】［実施例１］本実施例では、泡沫分離装
置、BE法による脱窒を行い得る脱窒槽（以下BE脱窒槽と
称する）、及び低温硝化菌が収容された硝化槽を具備す
る浄化システムについて記載する。[Embodiment 1] In this embodiment, a purification apparatus including a foam separation apparatus, a denitrification tank capable of performing denitrification by the BE method (hereinafter referred to as a BE denitrification tank), and a nitrification tank containing low-temperature nitrifying bacteria is provided. Describe the system.
【００２２】以下、図１を参照しながら、本実施例の装
置を説明する。Hereinafter, the apparatus of this embodiment will be described with reference to FIG.
【００２３】本実施例の装置は、浄化すべき飼育水が貯
溜されている飼育水槽１と、飼育水槽１の下流に配置さ
れ水位調節を行うためのバッファータンク２と、前記飼
育水を浄化システムの各部に送液するためのポンプ３
と、該ポンプの後段に配設された泡沫分離装置４と、該
泡沫分離装置４の後段に並列配置された硝化槽５及びBE
脱窒槽６と、硝化槽５の中に収容された、硝化菌を固相
するための担体７と、BE脱窒槽６の前段及び後段に配置
され、BE脱窒槽６への間欠通水を可能とする電磁弁８
と、BE脱窒槽６の中に収容された、脱窒菌を固相するた
めの担体９と、担体９に固相されている脱窒菌に電子又
は電子供与体を供給するための陽極１０及び陰極１１
と、殺菌装置１２と、循環ライン１３とを具備する。The apparatus of this embodiment comprises a breeding aquarium 1 in which breeding water to be purified is stored, a buffer tank 2 arranged downstream of the breeding aquarium 1 for adjusting the water level, and a clarification system for the breeding water. Pump 3 for sending liquid to each part of
And a foam separation device 4 disposed at a stage subsequent to the pump, and a nitrification tank 5 and a BE arranged in parallel at a stage subsequent to the foam separation device 4.
A denitrification tank 6, a carrier 7 contained in the nitrification tank 5 for solidifying nitrifying bacteria, and disposed before and after the BE denitrification tank 6, allowing intermittent water flow to the BE denitrification tank 6. Solenoid valve 8
And a carrier 9 contained in the BE denitrification tank 6 for immobilizing denitrifying bacteria, an anode 10 and a cathode for supplying electrons or electron donors to the denitrifying bacteria immobilized on the carrier 9. 11
, A sterilizer 12 and a circulation line 13.
【００２４】本実施例の装置によって浄化し得る水は、
水族館、養殖場、釣り堀、宇宙実験用施設を含む実験施
設、生け簀等に貯溜されている水棲生物の飼育水であり
得る。これらの飼育水は、ポンプ３の吸引作用によっ
て、循環ライン１３を通じて、飼育水槽１からバッファ
ータンク２を経て泡沫分離装置４に送液される。The water that can be purified by the apparatus of this embodiment is
It can be breeding water for aquatic organisms stored in aquariums, farms, fishing ponds, experimental facilities including space experiment facilities, cages, and the like. The breeding water is sent from the breeding aquarium 1 to the foam separator 4 through the buffer tank 2 through the circulation line 13 by the suction action of the pump 3.
【００２５】ポンプ３は、浄化システム中を循環させる
べき飼育水の流量に応じて、市販されている任意のポン
プを使用し得る。ポンプ３の設置位置及び個数は図１に
示されている位置に限定されない。As the pump 3, any commercially available pump can be used according to the flow rate of breeding water to be circulated in the purification system. The installation position and the number of the pumps 3 are not limited to the positions shown in FIG.
【００２６】泡沫分離装置４は、水の中に含まれる水棲
生物の排泄物や老廃物（剥離したウロコ等）、プランク
トンの死骸、及び残餌等の有機物、並びにss等の巨大物
質を濾過するための濾過槽の一種である。The foam separation device 4 filters organic matters such as excretions and wastes (exfoliated scales) of aquatic organisms contained in water, carcasses of plankton, and bait, and giant substances such as ss. It is a kind of filtration tank.
【００２７】泡沫分離装置４を用いれば、濾過槽自体を
洗浄するためのいわゆる逆洗工程が不要であり、逆洗工
程を行うための装置を省くことによって浄化システムを
小型化することができる。The use of the foam separator 4 eliminates the need for a so-called backwashing step for washing the filtration tank itself, and can reduce the size of the purification system by omitting an apparatus for performing the backwashing step.
【００２８】前述のように、泡沫分離装置自体は当業者
に周知であり、ブロワー、コンプレッサー、エアレータ
ー等によって発生された気泡のフローテーション効果に
より、水中に溶存している有機物等を槽外へ排出するシ
ステムである。泡沫分離装置には、泡沫発生源や汚染物
質を分散含有した泡沫の排出態様等が異なる様々な種類
が公知であるが、本発明の浄化システムには、所望の濾
過能力に応じて、任意の種類の泡沫分離装置を使用する
ことができる。As described above, the foam separation apparatus itself is well known to those skilled in the art, and the organic matter and the like dissolved in the water is moved out of the tank by the flotation effect of the bubbles generated by the blower, the compressor, the aerator and the like. It is a system that discharges. Various types of foam separation devices are known in which the foam generation source and the discharge mode of foam containing dispersed contaminants are different, and the purification system of the present invention has an arbitrary type depending on a desired filtration capacity. Different types of foam separators can be used.
【００２９】泡沫濾過装置４は、有機物やssを効果的に
除去し得るので、飼育水槽１に貯溜された水が大量の有
機物やssを含有している場合には、本実施例のごとく、
硝化槽５とBE脱窒槽６の前段に濾過槽を設置して、まず
これらの汚染物質を除去してから硝化槽５とBE脱窒槽６
に水を移送するのが好適であろう。Since the foam filtration device 4 can effectively remove organic substances and ss, when the water stored in the breeding aquarium 1 contains a large amount of organic substances and ss, as in this embodiment,
A filtration tank is installed before the nitrification tank 5 and the BE denitrification tank 6 to remove these contaminants first, and then the nitrification tank 5 and the BE denitrification tank 6 are removed.
It may be preferable to transfer the water to
【００３０】本実施例では、濾過槽として泡沫分離装置
を用いているが、濾過槽としては、泡沫分離装置に代え
て、又は泡沫分離装置と共に、フィルター、スキマー、
砂濾過槽、圧力濾過槽のような当業者に周知の濾過槽を
使用し得るが、濾過槽自体を洗浄するための逆洗工程が
不要であり、浄化システムを小型化し得るので、泡沫分
離装置を用いることが好ましい。In this embodiment, a foam separation device is used as a filtration tank. However, a filter, a skimmer, or the like may be used instead of the foam separation device or together with the foam separation device.
A filtration tank known to those skilled in the art, such as a sand filtration tank or a pressure filtration tank, may be used. However, since a backwashing step for washing the filtration tank itself is unnecessary and the purification system can be miniaturized, a foam separation device is used. It is preferable to use
【００３１】硝化槽５は、生物学的硝化法によって、よ
り具体的には硝化菌の作用によって、アンモニア態窒素
を硝酸態窒素に酸化せしめる。硝化菌には、ニトロソモ
ナス属(Nitrosomonas sp.)を含む亜硝酸菌とニトロバク
ター属(Nitrobacter sp.)を含む硝酸菌が含まれ、前者
はアンモニア態窒素を亜硝酸態窒素に酸化し、後者は亜
硝酸態窒素を硝酸態窒素に酸化する細菌である。The nitrification tank 5 oxidizes ammonia nitrogen to nitrate nitrogen by a biological nitrification method, more specifically, by the action of nitrifying bacteria. Nitrifying bacteria include nitrites including the genus Nitrosomonas sp. And nitrates including the genus Nitrobacter sp. Are bacteria that oxidize nitrite nitrogen to nitrate nitrogen.
【００３２】硝化菌は、槽内に固着又は分散含有された
担体７に固相することが好ましく、効率的な硝化を達成
するためには、槽内に担体を分散充填するのが好まし
い。担体を分散充填する場合には、該担体を攪拌するた
めの攪拌手段を取り付けてもよい。多数の細菌を固定す
るために、担体には、孔径が約数十〜数百μmで、サイ
ズが約数mm〜1cm程度の多孔質担体を用いることが好ま
しいが、孔径及びサイズともに、これらに限定されな
い。担体としては、ガラスビーズ、多孔質セルロース等
を用いることができるが、これに限定されない。担体に
細菌を固定化する方法は、当業者に周知であり、担体結
合法、包括法を含む任意の技術を使用し得る。担体の形
状は、球状、板状、紐状等任意の形状であり得る。The nitrifying bacteria are preferably solid-phased on the carrier 7 fixed or dispersed in the tank, and in order to achieve efficient nitrification, the carrier is preferably dispersed and filled in the tank. When the carrier is dispersedly filled, a stirring means for stirring the carrier may be provided. In order to fix a large number of bacteria, it is preferable to use a porous carrier having a pore size of about several tens to several hundreds μm and a size of about several mm to 1 cm in order to fix a large number of bacteria. Not limited. As the carrier, glass beads, porous cellulose, or the like can be used, but is not limited thereto. Methods for immobilizing bacteria on a carrier are well known to those skilled in the art, and any technique can be used, including carrier binding and entrapment. The shape of the carrier may be any shape such as a sphere, a plate, and a string.
【００３３】硝化菌は、環境条件の変化に比較的敏感で
あるため、飼育水槽１で飼育されている水棲生物に適し
た飼育水の条件、例えば温度やpHに応じて、適切な細菌
を選択することが好ましい。とりわけ、水温は水棲生物
の飼育のために低温（約10〜18℃）にされる場合が少な
くないため、低温でも硝化能力を有する硝化菌を使用す
ることが好ましい。低温でも優れた硝化能力を発揮し得
る硝化菌としては、１９９１年１０月４日付けで工業技
術院生命工学工業技術研究所に寄託されたNitrosomonas
属に属する亜硝酸菌（FERM P-12555）及びNitrobacter
属に属する硝酸菌（FERM P-12556）を挙げることができ
る。従って、該菌株を用いれば、低温下における硝化反
応速度の低下を抑制して、優れたアンモニア除去能力を
維持することが可能である。Since nitrifying bacteria are relatively sensitive to changes in environmental conditions, appropriate bacteria are selected according to the conditions of breeding water suitable for aquatic organisms bred in the breeding aquarium 1, for example, temperature and pH. Is preferred. In particular, since the water temperature is often set to a low temperature (about 10 to 18 ° C.) for breeding aquatic organisms, it is preferable to use nitrifying bacteria having a nitrifying ability even at a low temperature. Nitrosomonas that can exhibit excellent nitrification ability even at low temperatures include Nitrosomonas deposited on October 4, 1991 at the Institute of Biotechnology and Industrial Technology, National Institute of Advanced Industrial Science and Technology.
Nitrite belonging to the genus Genus (FERM P-12555) and Nitrobacter
Nitrate bacteria belonging to the genus (FERM P-12556) can be mentioned. Therefore, by using this strain, it is possible to suppress a decrease in the nitrification reaction rate at a low temperature and maintain excellent ammonia removing ability.
【００３４】本実施例の浄化システムでは、硝化槽５で
産生された硝酸態窒素は、硝化槽５から排出され、浄化
システム中を何度も循環する間にBE脱窒槽６において分
子状窒素に変換された後、最終的には水中から除去され
る。In the purification system of this embodiment, the nitrate nitrogen produced in the nitrification tank 5 is discharged from the nitrification tank 5 and is converted into molecular nitrogen in the BE denitrification tank 6 while circulating through the purification system many times. After conversion, it is finally removed from the water.
【００３５】脱窒槽６には、Paracoccus denitrifican
s, Pseudomonas denitrificans, Micrococcus denitrif
icans等の脱窒菌が固定されている。脱窒菌は、硝酸イ
オン又は亜硝酸イオンを分子状窒素にまで還元し得る細
菌である。また、脱窒菌の採取源としては、下水処理場
由来の活性汚泥等を挙げることができる。In the denitrification tank 6, Paracoccus denitrifican
s, Pseudomonas denitrificans, Micrococcus denitrif
Denitrifying bacteria such as icans are fixed. Denitrifying bacteria are bacteria that can reduce nitrate or nitrite ions to molecular nitrogen. In addition, as a collection source of the denitrifying bacteria, activated sludge from a sewage treatment plant and the like can be mentioned.
【００３６】このように、脱窒反応は、硝酸態窒素を還
元する反応なので、反応系に電子供与体が存在すること
が必須である。循環水流中に含まれる有機物も電子供与
体になり得るが、十分な脱窒反応を達成するためには、
水流中の有機物だけでは不十分である。このため、排水
処理装置等では、汚濁水にメタノールや乳酸等の還元剤
を添加することが行われているが、前述したように、か
かる方法は、生物に悪影響を及ぼすため、生物の飼育水
を浄化するためのシステムに適用することは極めて困難
であり、通常不可能である。As described above, since the denitrification reaction is a reaction for reducing nitrate nitrogen, it is essential that an electron donor is present in the reaction system. Organic matter contained in the circulating water stream can also be an electron donor, but in order to achieve a sufficient denitrification reaction,
Organic matter in the water stream alone is not enough. For this reason, in a wastewater treatment device or the like, a reducing agent such as methanol or lactic acid is added to polluted water. However, as described above, such a method has a bad effect on living organisms, so It is extremely difficult and usually impossible to apply to a system for purifying water.
【００３７】そこで、本発明の浄化システムでは、BE脱
窒法なる脱窒法により、脱窒反応を行っている。ここ
で、BE脱窒法とは、陰極用材料又は該材料と電気的に接
続された導電性材料に細菌等の生体触媒が固定化された
電極を通電することにより、前記生体触媒に電子又は電
子供与体（例えば、水素）を供給し、水中に存在する酸
化態窒素を還元処理する方法を意味する。BE脱窒法自体
は公知である。BE脱窒法の詳細については、特公平6-10
4230を参照されたい。Therefore, in the purification system of the present invention, a denitrification reaction is performed by a denitrification method such as a BE denitrification method. Here, the BE denitrification method refers to a method in which a biocatalyst such as a bacterium is immobilized on an electrode in which a biocatalyst such as a bacterium is immobilized on a cathode material or a conductive material electrically connected to the material, so that the biocatalyst is charged with electrons or electrons. It means a method in which a donor (for example, hydrogen) is supplied and reduction treatment of oxidized nitrogen present in water is performed. The BE denitrification method itself is known. For details of BE denitrification method,
See 4230.
【００３８】本実施例の浄化システムにおいては、陽極
１０と陰極１１の作用により脱窒菌に電子又は電子供与
体を供給している。陽極１０には黒鉛等の炭素電極、白
金電極、ニッケル電池等を含む任意の電極を使用し得
る。陰極１１には脱窒菌が固定されるので、導電性、耐
久性が高く、且つ表面に脱窒菌を固定し易いもの、具体
的には黒鉛等の炭素質材料が好適である。In the purification system of this embodiment, electrons or electron donors are supplied to the denitrifying bacteria by the action of the anode 10 and the cathode 11. Any electrode including a carbon electrode such as graphite, a platinum electrode, a nickel battery or the like can be used for the anode 10. Since the denitrifying bacteria are fixed to the cathode 11, those having high conductivity and durability and easily fixing the denitrifying bacteria on the surface, specifically, carbonaceous materials such as graphite are preferable.
【００３９】電極の形態も特定されないが、棒状、板
状、フィルム状等を例示し得る。Although the form of the electrode is not specified, it may be in the form of a rod, plate, film or the like.
【００４０】電極への固定化は、被処理水中の毒性物質
によって脱窒菌の活性が低下しないように包括固定する
ことが好ましいが、これ以外の固定法も使用し得る。It is preferable that the immobilization to the electrode is carried out comprehensively so that the activity of the denitrifying bacteria is not reduced by the toxic substance in the water to be treated, but other fixing methods can be used.
【００４１】両電極間に印加される電流量は、脱窒反応
の効率等に応じて適宜選択し得るが、0.001mA〜数Aが実
用的である。The amount of current applied between the two electrodes can be appropriately selected according to the efficiency of the denitrification reaction and the like, but 0.001 mA to several A is practical.
【００４２】陽極１０では、酸素が発生する可能性があ
り、これが還元雰囲気に影響を与える可能性も絶無では
ないが、電流値が低いこと、及び二酸化炭素の方が発生
し易いことから、このような影響は無視し得るものであ
る。酸素の影響を可及的に除去したいときには、機械的
攪拌により槽内の被処理水を均一化できる槽（完全混合
槽）以外の槽を使用すればよいであろう。At the anode 10, oxygen may be generated, which may affect the reducing atmosphere. However, since the current value is low and carbon dioxide is more likely to be generated, oxygen is generated. Such effects are negligible. When it is desired to remove the influence of oxygen as much as possible, a tank other than a tank (complete mixing tank) capable of equalizing the water to be treated in the tank by mechanical stirring may be used.
【００４３】脱窒菌を固相すべき担体９は、脱窒菌に電
子を供与し得るように、導電性の良好な材質で作成する
ことが好ましい。The carrier 9 on which the denitrifying bacteria are to be immobilized is preferably made of a material having good conductivity so that electrons can be supplied to the denitrifying bacteria.
【００４４】このようにしてBE脱窒槽６で分子状窒素に
転換された窒素は、循環ライン１３を通じて、殺菌装置
１２を経て飼育水槽１に送られた後、飼育水槽１におい
て気相中に放出される。The nitrogen thus converted into molecular nitrogen in the BE denitrification tank 6 is sent to the breeding aquarium 1 through the sterilizing device 12 through the circulation line 13 and then released into the gas phase in the breeding aquarium 1. Is done.
【００４５】本実施例の浄化システムでは、硝化槽４と
脱窒槽５が並列に配置され、脱窒槽５の前段及び後段に
は電磁弁８が取り付けられている。電磁弁８は、タイマ
ーにより一定時間毎に開閉が制御されているので、硝化
槽５には常時通水されるが、BE脱窒槽６への通水は間欠
的に行われることになる。このような間欠的な通水によ
って、BE脱窒槽６が嫌気状態に保たれ、還元雰囲気が達
成される。In the purification system of the present embodiment, the nitrification tank 4 and the denitrification tank 5 are arranged in parallel, and the solenoid valves 8 are mounted before and after the denitrification tank 5. The opening and closing of the solenoid valve 8 is controlled at regular intervals by a timer, so that water is always passed through the nitrification tank 5, but water is passed intermittently to the BE denitrification tank 6. By such intermittent flow of water, the BE denitrification tank 6 is maintained in an anaerobic state, and a reducing atmosphere is achieved.
【００４６】飼育水には水棲生物に不可欠な酸素が大量
に溶存しているため、BE脱窒槽の前、又は後ろ、好まし
くは前後に一以上の弁、好ましくは電磁弁を設置すれ
ば、脱窒反応の効率を向上させ得る。電磁弁に代えて、
又は電磁弁に加えて手動の弁を備えてもよい。Since a large amount of oxygen indispensable for aquatic organisms is dissolved in the breeding water, if one or more valves, preferably solenoid valves, are installed before or after, preferably before and after the BE denitrification tank, denitrification can be achieved. The efficiency of the nitrogen reaction can be improved. Instead of a solenoid valve,
Alternatively, a manual valve may be provided in addition to the electromagnetic valve.
【００４７】なお、BE脱窒槽６への間欠的な通水を可能
とするために、硝化槽５とBE脱窒槽６は、本実施例のよ
うに並列して配設するのが好ましいが、硝化槽５とBE脱
窒槽６の配置は並列配置に限られず、直列配置にしても
よい。In order to allow intermittent water flow to the BE denitrification tank 6, the nitrification tank 5 and the BE denitrification tank 6 are preferably arranged in parallel as in this embodiment. The arrangement of the nitrification tank 5 and the BE denitrification tank 6 is not limited to the parallel arrangement, but may be arranged in series.
【００４８】また、硝化槽５とBE脱窒槽６は、それぞれ
一以上の任意の個数を配置し得るので、さらに複雑な配
置、例えば直列配置と並列配置の併用も可能であり、各
槽の配置順序も任意に選択し得る。The nitrification tank 5 and the BE denitrification tank 6 can each be arranged in an arbitrary number of one or more, so that a more complicated arrangement, for example, a combination of a series arrangement and a parallel arrangement is also possible. The order can also be arbitrarily selected.
【００４９】本実施例の浄化システムには、硝化槽５と
BE脱窒槽６の後段に殺菌装置１２が取り付けられている
が、殺菌装置１２は必須ではない。殺菌装置を取り付け
る場合には、このような浄化システムにおいて一般的に
用いられている殺菌装置を使用し得る。The purification system of this embodiment includes a nitrification tank 5
A sterilizer 12 is attached to the rear of the BE denitrification tank 6, but the sterilizer 12 is not essential. When a sterilizer is installed, a sterilizer generally used in such a purification system can be used.
【００５０】［実施例２］以下、図２を参照しながら、
本実施例の浄化システムを説明する。Embodiment 2 Hereinafter, with reference to FIG.
A purification system according to the present embodiment will be described.
【００５１】実施例１の浄化システムにおいては、並列
配置された硝化槽５とBE脱窒槽６の前段に位置する循環
ライン１３の分岐部の前に泡沫分離装置４が配置されて
いるのに対して、本実施例の浄化システムでは、前記循
環ライン１３の分岐部の後段に泡沫分離装置が配置され
ている。In the purification system of the first embodiment, the foam separation device 4 is arranged in front of the branch of the circulation line 13 located in front of the nitrification tank 5 and the BE denitrification tank 6 which are arranged in parallel. Thus, in the purification system of the present embodiment, a foam separation device is disposed downstream of the branch of the circulation line 13.
【００５２】有機物は脱窒反応における電子供与体とな
り得るので、BE脱窒槽６に有機物を供給し、電子供与体
として使用したい場合には、本実施例の浄化システムが
適している。Since the organic matter can serve as an electron donor in the denitrification reaction, the purification system of this embodiment is suitable for supplying the organic matter to the BE denitrification tank 6 and using it as an electron donor.
【００５３】他方、飼育水を泡沫分離装置で処理せずに
BE脱窒槽６に供給すると、BE脱窒槽６が過度に汚染され
る場合もある。On the other hand, without treating the breeding water with a foam separation device,
When supplied to the BE denitrification tank 6, the BE denitrification tank 6 may be excessively contaminated.
【００５４】従って、実施例１の構成と本実施例の構成
は、飼育すべき水棲生物の種類、飼育水中の有機物の
量、必要とされる脱窒速度、脱窒槽洗浄のコスト等に応
じて適宜選択することが望ましい。Therefore, the structure of the first embodiment and the structure of the present embodiment depend on the type of aquatic organism to be bred, the amount of organic matter in the breeding water, the required denitrification speed, the cost of cleaning the denitrification tank, and the like. It is desirable to select an appropriate one.
【００５５】［実施例３］本実施例の浄化システムは、
図３に示されているように、実施例２の浄化システムの
泡沫分離装置中にオゾン発生器１４を配設したシステム
である。[Embodiment 3] The purification system of this embodiment is
As shown in FIG. 3, this is a system in which an ozone generator 14 is provided in a foam separation device of the purification system of the second embodiment.
【００５６】オゾンは有機物を酸化し得るので、飼育水
中にオゾンを発生させると有機物の分解が促進され、水
質の向上を図ることができる。Since ozone can oxidize organic substances, the generation of ozone in the breeding water promotes the decomposition of the organic substances and improves the water quality.
【００５７】オゾン発生器自体は公知であり、空中放電
方式のオゾナイザー及び電気分解式のオゾン発生器等が
市販されている。The ozone generator itself is known, and an air discharge type ozonizer, an electrolytic ozone generator, and the like are commercially available.
【００５８】オゾン発生器としては、任意の種類のオゾ
ン発生器を使用し得るが、電気分解式のオゾン発生器を
用いると、気相中に放出されたオゾンの廃棄処理装置が
不要となるため、システムのサイズを小さくすることが
可能である。従って、オゾン発生器としては、電気分解
式のオゾン発生器を用いることが好ましい。As the ozone generator, any kind of ozone generator can be used. However, if an electrolysis-type ozone generator is used, a device for disposing ozone released into the gas phase becomes unnecessary. , It is possible to reduce the size of the system. Therefore, it is preferable to use an electrolysis-type ozone generator as the ozone generator.
【００５９】電気分解式オゾン発生器は、典型的には、
希硫酸中で水を電気分解する装置であり、H2O＋O2→O3
↑＋2H+＋2e-の反応によってオゾンを発生し得る。An electrolytic ozone generator is typically
A device that electrolyzes water in dilute sulfuric acid. H 2 O + O 2 → O 3
Ozone can be generated by the reaction of ↑ + 2H + + 2e − .
【００６０】オゾン発生器は、発生させるべきオゾンの
量に応じて一以上の任意の個数を備え付けることができ
る。[0060] One or more arbitrary number of ozone generators can be provided according to the amount of ozone to be generated.
【００６１】なお、本実施例のごとく、本発明の浄化シ
ステムにオゾン発生器を使用する場合には、実施例２の
浄化システム以外の構成に対しても使用し得る。When an ozone generator is used in the purification system of the present invention as in the present embodiment, the ozone generator can be used for a configuration other than the purification system of the second embodiment.
【００６２】[0062]
【発明の効果】本発明の浄化システムは、バイオエレク
トロ脱窒槽を備えているので、水棲生物に悪影響を与え
ずに、飼育水中の硝酸態窒素を除去し得る。As described above, the purification system of the present invention has a bioelectrodenitrification tank, so that nitrate nitrogen in breeding water can be removed without adversely affecting aquatic organisms.
【００６３】また、本発明の浄化システムは、濾過槽と
して泡沫分離装置を用いることにより、砂濾過槽や濾過
槽自体の逆洗工程が不要で、且つシステム全体のサイズ
を小さくすることができる。In the purification system of the present invention, the use of a foam separator as the filtration tank eliminates the need for a backwashing step for the sand filtration tank and the filtration tank itself, and can reduce the size of the entire system.
【００６４】本発明の浄化システムは、低温での硝化能
力に優れた低温硝化菌が収容された硝化槽を備えること
により、水温の低い飼育水を浄化するためにも使用し得
る。The purification system of the present invention can be used for purifying breeding water having a low water temperature by providing a nitrification tank containing low-temperature nitrifying bacteria having excellent nitrification ability at low temperatures.
【００６５】さらに、本発明の浄化システムは、オゾン
発生器を備えることにより、有機物の除去能力が向上す
る。Further, the purification system of the present invention has an ozone generator, so that the ability to remove organic substances is improved.
【図１】実施例１の浄化システムを示す図。FIG. 1 is a diagram showing a purification system according to a first embodiment.
【図２】実施例２の浄化システムを示す図。FIG. 2 is a diagram showing a purification system according to a second embodiment.
【図３】実施例３の浄化システムを示す図。FIG. 3 is a diagram showing a purification system according to a third embodiment.
１：飼育水槽１、２：バッファータンク、３：ポンプ、
４：泡沫分離装置、５：硝化槽、６：バイオエレクトロ
脱窒槽、７：担体、８：電磁弁、９：担体、１０：陽
極、１１：陰極、１２：殺菌装置、１３：循環ライン、
１４：オゾン発生器1: breeding aquarium 1, 2: buffer tank, 3: pump,
4: foam separator, 5: nitrification tank, 6: bioelectrodenitrification tank, 7: carrier, 8: solenoid valve, 9: carrier, 10: anode, 11: cathode, 12: sterilizer, 13: circulation line,
14: Ozone generator
───────────────────────────────────────────────────── フロントページの続き (72)発明者 樋口 哲朗 山口県下関市彦島江の浦町六丁目16番１ 号 三菱重工業株式会社下関造船所内 (56)参考文献 特開 平４−131027（ＪＰ，Ａ) 特開 平８−197090（ＪＰ，Ａ) 特開 平11−225616（ＪＰ，Ａ) 実開 昭63−136800（ＪＰ，Ｕ) 特公 平６−104230（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.7，ＤＢ名) A01K 63/04 C02F 1/24 C02F 1/78 C02F 3/34 101 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tetsuro Higuchi 6-16-1, Hikoshima Enoura-cho, Shimonoseki-shi, Yamaguchi Pref. Shimonoseki Shipyard, Mitsubishi Heavy Industries, Ltd. (56) References JP-A-4-131027 (JP, A) JP-A-8-197090 (JP, A) JP-A-11-225616 (JP, A) JP-A-63-136800 (JP, U) JP-B-6-104230 (JP, B2) (58) (Int.Cl. 7 , DB name) A01K 63/04 C02F 1/24 C02F 1/78 C02F 3/34 101
Claims (8)
ssを除去するための泡沫分離装置と、 前記飼育水中のアンモニア態窒素を硝酸態窒素に変換す
るための硝化槽と、 バイオエレクトロ脱窒法によって、前記飼育水に含まれ
る硝酸態窒素を除去するための脱窒槽と、を備えたこと
を特徴とする水棲生物飼育水浄化システム。An organic matter contained in breeding water in a breeding tank and
a foam separation device for removing ss, a nitrification tank for converting ammonia nitrogen in the breeding water into nitrate nitrogen, and a nitrate nitrogen contained in the breeding water by a bioelectrodenitrification method A water purification system for raising aquatic organisms, comprising: a denitrification tank.
ssを除去するための濾過槽と、 低温での硝化能力に優れた低温硝化菌が収容された、前
記飼育水中のアンモニア態窒素を硝酸態窒素に変換する
ための硝化槽と、 バイオエレクトロ脱窒法によって前記飼育水に含まれる
硝酸態窒素を除去するための脱窒槽と、を備えた水棲生
物飼育水浄化システム。2. Organic matter contained in breeding water in a breeding tank and
a filtration tank for removing ss, a nitrification tank for converting ammonia nitrogen in the breeding water into nitrate nitrogen containing low-temperature nitrifying bacteria having excellent nitrification ability at low temperature, and a bio-electro-denitrification method. And a denitrification tank for removing nitrate nitrogen contained in the breeding water.
ssを除去するための濾過槽と、 該濾過槽に収容された一以上のオゾン発生器と、 前記飼育水中のアンモニア態窒素を硝酸態窒素に変換す
るための硝化槽と、 バイオエレクトロ脱窒法によって前記飼育水に含まれる
硝酸態窒素を除去するための脱窒槽と、を備えた水棲生
物飼育水浄化システム。3. Organic matter contained in breeding water in a breeding tank and
a filtration tank for removing ss, one or more ozone generators accommodated in the filtration tank, a nitrification tank for converting ammonia nitrogen in the breeding water to nitrate nitrogen, and a bioelectrodenitrification method. An aquatic breeding water purification system comprising: a denitrification tank for removing nitrate nitrogen contained in the breeding water.
特徴とする請求項２に記載の水棲生物飼育水浄化システ
ム。4. The aquatic breeding water purification system according to claim 2, wherein the filtration tank is a foam separation device.
特徴とする請求項３に記載の水棲生物飼育水浄化システ
ム。5. The aquatic breeding water purification system according to claim 3, wherein the filtration tank is a foam separation device.
発生器が収容されていることを特徴とする請求項４に記
載の水棲生物飼育水浄化システム。6. The aquatic breeding water purification system according to claim 4, wherein one or more ozone generators are housed in the foam separation device.
ており、前記飼育槽から取り出した前記飼育水を分岐さ
せて、前記硝化槽と前記脱窒槽に並列に供給することを
特徴とする請求項１〜６の何れか1項に記載の水棲生物
飼育水浄化システム。7. The nitrification tank and the denitrification tank are arranged in parallel, and the breeding water taken out of the breeding tank is branched and supplied to the nitrification tank and the denitrification tank in parallel. The aquatic organism breeding water purification system according to any one of claims 1 to 6.
槽に前記飼育水を分岐させて供給するための分岐部と前
記硝化槽との間に前記濾過槽又は前記泡沫分離装置が配
置されていることを特徴とする請求項１〜７に記載の水
棲生物飼育水浄化システム。8. The filter tank or the foam separation device is disposed between a branch portion for branching and supplying the breeding water to the nitrification tank and the denitrification tank arranged in parallel and the nitrification tank. The aquatic organism breeding water purification system according to claim 1, wherein:
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| JP3316487B2 true JP3316487B2 (en) | 2002-08-19 |
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| JP5463022B2 (en) * | 2008-11-20 | 2014-04-09 | 三菱重工業株式会社 | Wastewater treatment apparatus and method for space station |
| CN105519484A (en) * | 2016-01-27 | 2016-04-27 | 南京新骥厨具设备发展有限公司 | Intelligent fish tank |
| CN110845096B (en) * | 2020-01-15 | 2020-06-16 | 鲁东大学 | Marine aquaculture wastewater treatment equipment |
| CN111820178A (en) * | 2020-08-07 | 2020-10-27 | 重庆科技学院 | Column type aquaponics system |
| WO2025263620A1 (en) * | 2024-06-20 | 2025-12-26 | Ａｐｓジャパン株式会社 | Water tank water quality management method and water quality management device |
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