JP5937372B2 - Wastewater treatment system - Google Patents
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- JP5937372B2 JP5937372B2 JP2012022202A JP2012022202A JP5937372B2 JP 5937372 B2 JP5937372 B2 JP 5937372B2 JP 2012022202 A JP2012022202 A JP 2012022202A JP 2012022202 A JP2012022202 A JP 2012022202A JP 5937372 B2 JP5937372 B2 JP 5937372B2
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- 238000004065 wastewater treatment Methods 0.000 title claims description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 149
- 238000011282 treatment Methods 0.000 claims description 107
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 99
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 71
- 238000001914 filtration Methods 0.000 claims description 39
- 239000002351 wastewater Substances 0.000 claims description 38
- 230000003647 oxidation Effects 0.000 claims description 37
- 238000007254 oxidation reaction Methods 0.000 claims description 37
- 235000013305 food Nutrition 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 23
- 238000004519 manufacturing process Methods 0.000 claims description 20
- 238000012545 processing Methods 0.000 claims description 18
- 230000001954 sterilising effect Effects 0.000 claims description 17
- 239000000428 dust Substances 0.000 claims description 8
- 239000006260 foam Substances 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 description 21
- 239000000126 substance Substances 0.000 description 12
- 239000007789 gas Substances 0.000 description 11
- 239000007788 liquid Substances 0.000 description 10
- 239000002699 waste material Substances 0.000 description 9
- 238000007667 floating Methods 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- 239000007787 solid Substances 0.000 description 6
- 238000004659 sterilization and disinfection Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000008280 blood Substances 0.000 description 4
- 210000004369 blood Anatomy 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
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- 230000001580 bacterial effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
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- 230000007613 environmental effect Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 235000013402 health food Nutrition 0.000 description 2
- 239000002035 hexane extract Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
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- 244000005700 microbiome Species 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
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- 238000003756 stirring Methods 0.000 description 2
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- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
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- 241001474374 Blennius Species 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
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- 244000061456 Solanum tuberosum Species 0.000 description 1
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- 150000001450 anions Chemical class 0.000 description 1
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- 239000003925 fat Substances 0.000 description 1
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- 239000008394 flocculating agent Substances 0.000 description 1
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- 239000005417 food ingredient Substances 0.000 description 1
- 235000011194 food seasoning agent Nutrition 0.000 description 1
- 235000003599 food sweetener Nutrition 0.000 description 1
- 235000013611 frozen food Nutrition 0.000 description 1
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- 239000005457 ice water Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
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- 238000004062 sedimentation Methods 0.000 description 1
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Landscapes
- Physical Water Treatments (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Water Treatment By Sorption (AREA)
- Filtering Materials (AREA)
Description
本発明は、水の循環利用を進める排水処理システムに関し、特に水産品を加工する食品製造工場の加工工程で排出される水を連続して再利用可能とし、更に排水処理入口の水質の向上・負荷軽減に繋げるものに関する。 The present invention relates to a wastewater treatment system that promotes the circulation and use of water. In particular, the water discharged in the processing process of a food manufacturing factory that processes marine products can be continuously reused, and the water quality at the wastewater treatment inlet can be improved. It relates to things that can reduce the load.
食品製造工場で使用される水については、食品衛生法上「飲用適の水」を用いることと定められている。このため、一般の食品製造工場で使用される水としては、飲料水である市水（上水）が使用されている。このとき、使用された市水は一回の利用で廃水として処分されるために勿体ないことに加え、排水中には食品の加工工程で発生する汚物が含まれるために、排水処理装置入口の廃水原水の生物化学的酸素要求量(BOD)、化学的酸素要求量(COD)、浮遊物質(SS)、ノルマルヘキサン抽出物質(n-hex)等の値を上昇させて、排水処理に過負荷を与えている。 Regarding water used in food manufacturing plants, the Food Sanitation Law stipulates that “drinkable water” should be used. For this reason, as water used in a general food manufacturing factory, city water (water supply) which is drinking water is used. At this time, the city water used is disposed of as wastewater in a single use. In addition, wastewater contained in the wastewater treatment equipment entrance is included in the wastewater because it contains filth generated in the food processing process. Overloading wastewater treatment by increasing the values of raw water biochemical oxygen demand (BOD), chemical oxygen demand (COD), suspended solids (SS), normal hexane extract (n-hex), etc. Giving.
水産食品を処理する水産工場の排水の一部には、魚の冷し込みに使用する氷水や割砕機から排水される水等のように血水混じりが含まれるため、生物化学的酸素要求量（BOD）、化学的酸素要求量（COD）、浮遊物質（SS）及びノルマルヘキサン抽出物質（n-hex）が高濃度に含まれている。例えば、水産品の食品製造工場における排水の一例では、BOD=550mg/L、COD=180mg/L、SS=420mg/L、n-hex=110mg/L であった。この排水をタンクに溜めて置いても沈降分離は行われないため、排水処理装置で処理する必要がある。現状の排水処理装置では、所定の水質基準値（排出水量が50m3/日以上の場合：BOD≦120mg/L、COD≦120mg/L、SS≦150mg/L、n-hex≦30mg/L）を維持するために、ポリ塩化アルミニュウムやアニオン・カチオン等の凝集剤、その他の薬品を使用する必要があるので経費負担も発生してしまう。 Some of the effluents from fisheries plants that process fishery products contain blood and water such as ice water used to cool fish and water drained from crushers, so biochemical oxygen demand (BOD) ), Chemical oxygen demand (COD), suspended solids (SS) and normal hexane extract (n-hex) in high concentrations. For example, in an example of wastewater from a fishery product manufacturing factory, BOD = 550 mg / L, COD = 180 mg / L, SS = 420 mg / L, n-hex = 110 mg / L. Even if this wastewater is stored in a tank, it does not undergo sedimentation and must be treated with a wastewater treatment device. In the current wastewater treatment equipment, the prescribed water quality standard value (when the discharge water volume is 50m 3 / day or more: BOD ≦ 120mg / L, COD ≦ 120mg / L, SS ≦ 150mg / L, n-hex ≦ 30mg / L) It is necessary to use a flocculant such as polyaluminum chloride, anion and cation, and other chemicals in order to maintain the above, so that a cost burden is also incurred.
この問題を解決するための技術開発が行われている。例えば、特許文献１には、一般家庭や、食品製造工場等から排出される廃液中に含まれる有機物を効率よく酸化分解する装置が開示されている。この廃液の処理装置には、有機物含有廃液にオゾンガスを溶解させ有機物を酸化分解処理する処理槽と、オゾンガスを発生するオゾン発生装置により処理槽から加圧ポンプによって圧送される有機物含有廃液を混合してオゾンガスの気泡径を微細化するマイクロバブル発生装置と、処理槽の下部に処理槽内の有機物含有廃液を攪拌する攪拌装置とが備えられている。 Technological development to solve this problem is underway. For example, Patent Document 1 discloses an apparatus that efficiently oxidizes and decomposes organic substances contained in waste liquid discharged from a general household or a food manufacturing factory. This waste liquid treatment device is a mixture of a treatment tank that dissolves ozone gas in an organic substance-containing waste liquid and oxidatively decomposes the organic substance, and an organic substance-containing waste liquid that is pumped by a pressure pump from the treatment tank by the ozone generator that generates ozone gas. In addition, a microbubble generator for reducing the bubble diameter of ozone gas and a stirring device for stirring the organic-containing waste liquid in the processing tank are provided below the processing tank.
しかしながら、上記廃液の処理装置は、廃液を溜めて処理するバッチ方式であり、限られた容器の量を処理した後に、次の廃液を溜め処理しなければならず、処理時間と処理量に問題があった。
本発明は、上記した事情に鑑みてなされたものであり、その目的は、より多量の排水を短時間で処理可能な連続方式の排水処理システムを提供することである。
However, the waste liquid treatment apparatus is a batch system that collects and processes waste liquid, and after processing a limited amount of containers, the next waste liquid must be stored and processed, and there is a problem in processing time and processing volume. was there.
The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a continuous wastewater treatment system capable of treating a larger amount of wastewater in a short time.
食品製造工場で使用される水については、食品衛生法上「飲用適の水であること」が要求されている。その為、排水の再利用に関する研究開発にはリスクがあるとして技術開発が行われておらず、排水の末端処理施設である排水処理装置に技術開発の目が向けられていた。本発明者は、上記課題に鑑み、排水殺菌・循環（中水化）処理を行うことにより、排水を再利用可能な再生水とする研究開発を行った。この発明により、従来の川下処理から川上での排水処理が可能となるので、再利用水の使用先（用途）を「食品等に与えるリスクが無い」箇所に差別した専用配管を敷設することでリスク回避と節水を行い、水道経費の軽減と排水処理の負荷軽減するためのシステムを提供できる。 Regarding water used in food manufacturing factories, the food hygiene law requires that it be “potable water”. For this reason, there has been no technical development because there is a risk in research and development related to the reuse of wastewater, and the focus of technological development has been directed to the wastewater treatment equipment, which is a terminal treatment facility for wastewater. In view of the above problems, the present inventor conducted research and development to make wastewater reusable water by performing wastewater sterilization / circulation (soaking) treatment. Since this invention enables upstream wastewater treatment from downstream treatment, the use of recycled water (use) is laid out in a dedicated pipe that is differentiated in a place where there is no risk of giving food, etc. A system can be provided to avoid risks and save water, reduce water costs and reduce wastewater treatment load.
こうして、上記目的を達成するための第一の発明に係る排水処理システムは、食品製造工場の加工工程で生じた排水を処理して再生水を得るためのものであって、前記排水を通過させることでゴミ・残渣類を除去してろ過水とする一次フィルタを備えた一次ろ過槽と、この一次ろ過槽に連結され、前記ろ過水に送り込むマイクロバブルを発生させるマイクロバブル発生装置を備え、前記ろ過水を泡沫分離して分離水とするマイクロバブル処理槽と、このマイクロバブル処理槽に連結され、前記分離水に吹き込むオゾンを発生させるオゾン発生装置を備え、前記分離水を酸化処理して殺菌水とするオゾン酸化処理槽と、このオゾン酸化処理槽に連結され、前記殺菌水を処理する活性炭フィルタを備え、前記殺菌水を活性炭で処理して再生水とする活性炭ろ過槽とを備え、前記マイクロバブル処理槽には、この処理槽内の水を循環させる第１循環ポンプが設けられており、前記オゾン酸化処理槽には、この処理槽内の水を循環させる第２循環ポンプが設けられていることを特徴とする。 Thus, the wastewater treatment system according to the first invention for achieving the above object is for obtaining the reclaimed water by treating the wastewater generated in the processing step of the food manufacturing factory, and allowing the wastewater to pass therethrough. A primary filtration tank provided with a primary filter that removes dust and residues as filtered water, and a microbubble generator that is connected to the primary filtration tank and generates microbubbles that are sent to the filtered water. A micro-bubble treatment tank that separates water into foam to separate water, and an ozone generator that is connected to the micro-bubble treatment tank and generates ozone to be blown into the separated water. The sterilized water is obtained by oxidizing the separated water. An ozone oxidation treatment tank and an activated carbon filter connected to the ozone oxidation treatment tank for treating the sterilized water, and treating the sterilized water with activated carbon to obtain recycled water. The microbubble treatment tank is provided with a first circulation pump that circulates the water in the treatment tank, and the ozone oxidation treatment tank circulates the water in the treatment tank. A second circulating pump is provided.
本発明において、前記マイクロバブル発生装置には、オゾン発生装置が設けられていることが好ましい。
また、前記マイクロバブル処理槽と前記オゾン酸化処理槽との間には第１閉止弁を設けた第１流路が設けられ、この第１流路には前記マイクロバブル処理槽の最高水位よりも低い位置であり、かつ当該第１流路よりも高い位置であって前記第１循環ポンプがマイクロバブル処理槽内の水を循環させられる位置に至ったときに前記第１閉止弁の閉止時において前記分離水を水頭圧で前記マイクロバブル処理槽から前記オゾン酸化処理槽に移送する第１バイパス流路が設けられていると共に、前記オゾン酸化処理槽と前記活性炭ろ過槽との間には第２閉止弁を設けた第２流路が設けられ、この第２流路には前記オゾン酸化処理槽の最高水位よりも低い位置であり、かつ当該第２流路よりも高い位置であって前記第２循環ポンプがオゾン酸化処理槽内の水を循環させられる位置に至ったときに前記第２閉止弁の閉止時において前記殺菌水を水頭圧で前記オゾン酸化処理槽から前記活性炭ろ過槽に移送する第２バイパス流路が設けられていることが好ましい。
In the present invention, the microbubble generator is preferably provided with an ozone generator.
In addition, a first flow path provided with a first shut-off valve is provided between the microbubble treatment tank and the ozone oxidation treatment tank, and the first flow path is higher than the maximum water level of the microbubble treatment tank. When the first shut-off valve is closed when the first circulation pump reaches a position where the water is circulated through the microbubble treatment tank at a low position and higher than the first flow path. A first bypass passage is provided for transferring the separated water from the microbubble treatment tank to the ozone oxidation treatment tank at a head pressure, and a second bypass channel is provided between the ozone oxidation treatment tank and the activated carbon filtration tank. A second flow path provided with a shut-off valve is provided, and the second flow path is at a position lower than the highest water level of the ozone oxidation treatment tank and at a position higher than the second flow path. 2 circulation pump is ozone oxidation treatment tank A second bypass passage is provided for transferring the sterilizing water from the ozone oxidation treatment tank to the activated carbon filtration tank at a water head pressure when the second shut-off valve is closed when reaching a position where the water can be circulated. Preferably it is.
また、前記マイクロバブル処理槽の水面付近には、マイクロバブル処理によって水面付近に浮遊する夾雑物を当該処理槽の外方に導出する樋部が設けられていることが好ましい。また、前記オゾン酸化処理槽の水面付近にも前記樋部を設けることが好ましい。
また、前記第２流路における前記活性炭ろ過槽への開口である殺菌水導入路は、前記活性炭フィルタに連結されており、前記殺菌水は第２流路を経た後に、前記活性炭フィルタを通過して前記活性炭ろ過槽に導入されることが好ましい。
また、前記フィルタは、ゴミ・残渣類の捕獲率の優れたヤシ柄マットであることが好ましい。
Moreover, it is preferable that a hook portion is provided in the vicinity of the water surface of the microbubble treatment tank so as to lead out impurities floating near the water surface by the microbubble treatment to the outside of the treatment tank. Moreover, it is preferable to provide the said collar part also in the water surface vicinity of the said ozone oxidation treatment tank.
In addition, a sterilizing water introduction path that is an opening to the activated carbon filtration tank in the second flow path is connected to the activated carbon filter, and the sterilizing water passes through the activated carbon filter after passing through the second flow path. It is preferably introduced into the activated carbon filtration tank.
Moreover, it is preferable that the filter is a palm pattern mat having an excellent dust / residue capture rate.
第二の発明に係る排水処理方法は、食品製造工場の加工工程で生じた排水を処理して再生水を得るためのものであって、（１）前記排水に浮遊する塵芥・残渣類を一次フィルタで処理してろ過水とする一次ろ過工程、（２）前記ろ過水にマイクロバブルを送り込んで、油分・タンパク質を泡に付着させて水表面に浮かせることで泡沫分離し、分離水とするマイクロバブル処理工程、（３）前記分離水中にオゾンを吹き込み、オゾン酸化を行うことで微生物を殺菌して殺菌水とするオゾン酸化処理工程、及び（４）前記殺菌水を活性炭で処理することにより再生水を得る活性炭処理工程、を含むことを特徴とする。
このとき、前記（２）マイクロバブル処理工程においては、オゾンを含有する空気でマイクロバブルを発生させることが好ましい。
A wastewater treatment method according to a second invention is for obtaining reclaimed water by treating wastewater generated in a processing process of a food manufacturing factory, and (1) primary filter for dust / residues floating in the wastewater. (1) Microbubbles that are separated into bubbles by sending microbubbles to the filtered water, allowing oil and protein to adhere to the bubbles and floating on the surface of the water. Treatment step, (3) ozone oxidation treatment step of sterilizing microorganisms by bubbling ozone into the separated water and performing ozone oxidation, and (4) reclaimed water by treating the sterilized water with activated carbon. An activated carbon treatment step to be obtained.
At this time, in the (2) microbubble treatment step, it is preferable to generate microbubbles with air containing ozone.
食品とは、食事の材料として使用されるものであり、動物性食品（肉類、魚介類、卵類、牛乳など）、植物性食品（穀類、豆類、芋類、野菜、山菜、海藻、種実類、果物、ハーブなど）、加工食品（漬け物、佃煮、乾物、練り製品、粉類、缶詰、冷凍食品、レトルト食品、インスタント食品、乳製品など）、嗜好食品（菓子、嗜好品など）調味用材料（油脂、甘味料、調味料、香辛料など）、健康食品（サプリメント、保健用食品など）、飲料（ジュース、茶、コーヒー、清涼飲料水など）、加工材料（ゲル化剤、膨張剤、食品添加物など）などが含まれる。本発明においては、上記食品のうち、特に、血・液体・肉などのタンパク質を含む排水が排出される食品製造工場において好適に使用される。
マイクロバブルとは、直径が50μm〜5μm程度の気泡を意味する。一般的な気泡（あわ）とは異なり、長時間に渡って水中に滞在し、表面電位特性によって反発しあい、自己圧壊作用により水・窒素などが分解されてラジカルが生成されるなどの特性がある。マイクロバブルを製造するには、大きく分けて、加圧減圧法（高圧下で気体を大量に溶解させ、減圧により再気泡化する方法）と、気液剪断法（渦流を作って、気体を巻き込ませ、ファンにより切断・粉砕させる方法）とがある。本発明においては、いずれの方法を用いて作成されたマイクロバブルも使用できる。
Food is used as a food ingredient, animal food (meat, seafood, eggs, milk, etc.), vegetable food (cereals, beans, potatoes, vegetables, wild vegetables, seaweed, seeds, etc.) , Fruits, herbs, etc.), processed foods (pickled, boiled, dried, kneaded products, flours, canned, frozen foods, retort foods, instant foods, dairy products, etc.), taste foods (confectionery, luxury products, etc.) Fats and oils, sweeteners, seasonings, spices, etc., health foods (supplements, health foods, etc.), beverages (juice, tea, coffee, soft drinks, etc.), processing materials (gelling agents, swelling agents, food additives) Etc.). In this invention, it uses suitably in the foodstuff manufacturing factory from which the waste_water | drain containing proteins, such as blood, liquid, and meat, is discharged | emitted among the said foodstuffs.
The microbubble means a bubble having a diameter of about 50 μm to 5 μm. Unlike ordinary bubbles, they stay in water for a long time, repel each other due to surface potential characteristics, and have the characteristics that water, nitrogen, etc. are decomposed by self-crushing action to generate radicals. . To produce microbubbles, it can be broadly divided into a pressure-reduced pressure method (a method in which a large amount of gas is dissolved under high pressure and then re-bubbled under reduced pressure), and a gas-liquid shearing method (creating a vortex and entraining the gas). And a method of cutting and pulverizing with a fan). In the present invention, microbubbles produced using any method can be used.
本発明によれば、食品製造工場の加工工程から排出される排水を殺菌浄化し、再利用できるので、使用水量の削減と、排水される水質の向上が図れる。すなわち、本発明は、排水処理装置入口原水の水質向上による負荷軽減によって、凝集剤や薬品類のコスト削減に寄与する川上型の排水浄化システムであり、先進的な環境浄化に貢献できる。
また、排水中に浮遊するゴミ・残渣類の捕獲に使用する一次フィルタとしてヤシ柄マットを、懸濁物を除去するフィルタとして活性炭フィルタを用いた場合には、いずれも汎用品であり、安価かつ安定供給が可能であるため、排水処理システムの実施に要する媒体として、薬品等は一切使用せず、ポンプ類を回す電気のみを必要とするローコストシステムとなる。
こうして、本発明によれば、食品製造工場内の施設で生じる排水を連続的に、短時間かつ大量に処理して、再利用可能な再生水とするシステムを提供することが可能となる。
According to the present invention, the waste water discharged from the processing process of the food manufacturing factory can be sterilized and reused, so that the amount of water used can be reduced and the quality of the drained water can be improved. That is, the present invention is an upstream-type wastewater purification system that contributes to cost reduction of coagulants and chemicals by reducing the load by improving the quality of the raw water at the inlet of the wastewater treatment apparatus, and can contribute to advanced environmental purification.
In addition, when a palm pattern mat is used as the primary filter used to capture dust and residues floating in the wastewater, and an activated carbon filter is used as a filter to remove suspended matter, both are general-purpose products, inexpensive and Since stable supply is possible, it is a low-cost system that does not use any chemicals as a medium required for the implementation of the wastewater treatment system and requires only electricity to turn pumps.
Thus, according to the present invention, it is possible to provide a system for continuously treating a large amount of waste water generated in a facility in a food manufacturing factory in a short time and producing reusable recycled water.
次に、本発明の実施形態について、図表を参照しつつ説明するが、本発明の技術的範囲は、これらの実施形態によって限定されるものではなく、発明の要旨を変更することなく様々な形態で実施することができる。 Next, embodiments of the present invention will be described with reference to the drawings. However, the technical scope of the present invention is not limited by these embodiments, and various forms can be made without changing the gist of the invention. Can be implemented.
図１には、本実施形態の排水処理システムの全体を模式的に示した。この排水処理システムは、食品製造工場（例えば、魚類）における食品の加工工程で生じた排水を処理して、再生水を得るためのものである。この排水処理システムには、一次ろ過槽１０と、マイクロバブル処理槽２０と、オゾン酸化処理槽３０と、活性炭ろ過槽４０と、循環ポンプ槽５０とが備えられている。一次ろ過槽１０には、食品製造工場の加工工程で生じた排水を導入する移送配管１１と、一次フィルタ１２と、水中ポンプ１９が設けられている。一次フィルタ１２は、排水中のゴミ・残渣類を除去するためのものであり、例えばヤシ柄マットを用いて製造できる。水中ポンプ１９は、一次ろ過槽１０の水をこの槽内で循環させると共に、一次ろ過済のろ過水を次のマイクロバブル処理槽２０に移送するために使用される。水中ポンプ１９から吐出するための配管１７は、槽内循環のための循環用配管１６と、次槽への移送のための移送用配管１４に分離されており、各配管１６，１４の途中には、それぞれ流量の調節が可能な流量調整弁１５，１３が設けられている。 In FIG. 1, the whole waste water treatment system of this embodiment was typically shown. This wastewater treatment system is for obtaining reclaimed water by treating wastewater generated in a food processing process in a food manufacturing factory (for example, fish). The wastewater treatment system includes a primary filtration tank 10, a microbubble treatment tank 20, an ozone oxidation treatment tank 30, an activated carbon filtration tank 40, and a circulation pump tank 50. The primary filtration tank 10 is provided with a transfer pipe 11 for introducing drainage generated in a processing process of a food manufacturing factory, a primary filter 12, and a submersible pump 19. The primary filter 12 is for removing dust and residues in the waste water, and can be manufactured using, for example, a palm pattern mat. The submersible pump 19 is used to circulate the water in the primary filtration tank 10 in this tank and to transfer the filtered water after the primary filtration to the next microbubble treatment tank 20. The pipe 17 for discharging from the submersible pump 19 is separated into a circulation pipe 16 for circulation in the tank and a transfer pipe 14 for transfer to the next tank. Are provided with flow rate adjusting valves 15 and 13 each capable of adjusting the flow rate.
マイクロバブル処理槽２０には、ろ過水を移送するための移送用配管１４と、マイクロバブルを発生させると共に、これをマイクロバブル処理槽２０内に循環させる第１循環ポンプとしての循環用ポンプ２９と、バッフルプレート２４が設けられている。バッフルプレート２４は、マイクロバブル処理槽２０内のろ過水を適当な時間だけマイクロバブル処理槽２０内でマイクロバブル処理を行い、自由には次のオゾン酸化処理槽３０に送らないための邪魔板として機能する。バッフルプレート２４の下端部分には、潜り堰２５が設けられている。循環用ポンプ２９には、オゾン発生装置７０で発生するオゾンの一部を供給するためのオゾン供給管７１が注入ノズル２２を介して連結されている。循環用ポンプ２９は、吸入配管２１を通じて、マイクロバブル処理槽２０内の水を吸入し、オゾンガスを含み得るマイクロバブルを吐出配管２３を通じてマイクロバブル処理槽２０に吐出する。 The microbubble treatment tank 20 has a transfer pipe 14 for transferring filtered water, a circulation pump 29 as a first circulation pump that generates microbubbles and circulates the microbubbles in the microbubble treatment tank 20. A baffle plate 24 is provided. The baffle plate 24 is used as a baffle plate for performing microbubble treatment in the microbubble treatment tank 20 for an appropriate time in the filtered water in the microbubble treatment tank 20 and not freely sending it to the next ozone oxidation treatment tank 30. Function. A dive weir 25 is provided at the lower end portion of the baffle plate 24. An ozone supply pipe 71 for supplying a part of the ozone generated by the ozone generator 70 is connected to the circulation pump 29 via the injection nozzle 22. The circulation pump 29 sucks water in the microbubble treatment tank 20 through the suction pipe 21 and discharges microbubbles that may contain ozone gas to the microbubble treatment tank 20 through the discharge pipe 23.
また、マイクロバブル処理槽２０には、水面付近に泡と共に浮遊する夾雑物をマイクロバブル処理槽２０の外方に導出するための樋部６０が設けられている。樋部６０は、図４に示すように、マイクロバブル処理槽２０の水面付近に配置される一対の第一樋６１，６１と、マイクロバブル処理槽２０の外方において、第一樋６１の下方に配置される第二樋６３と、この第二樋６３から排出される夾雑物を吐き出す導出樋６２とを備えている。第一樋６１は、上方に開放すると共に、第二樋６３の方向に開口６５を備えて、平面が長方形状に形成されており、左右両側の壁面には、それぞれ３ヶ所の凹部６４が設けられている。第一樋６１は、マイクロバブル処理槽２０から第二樋６３側に傾斜する傾斜面を備えて構成されている。第二樋６３は、導出樋６２側に傾斜する傾斜面を備えて、断面が半円状に形成されている。両第一樋６１は、槽内の壁面から少し（例えば、約50mm程度）離れた個所に設置することにより、水循環時の水面の揺動による泡沫の回収性を効率よくさせるようになっている。水面付近にマイクロバブルと共に泡沫分離された夾雑物は、凹部６４から第一樋６１に進入し、傾斜面に沿って第一樋６１を通過した後、開口６５から第二樋６３に落下し、傾斜面に沿って導出樋６２方向に進んで外方に廃棄される。 In addition, the microbubble treatment tank 20 is provided with a ridge portion 60 for deriving foreign matters floating together with bubbles near the water surface to the outside of the microbubble treatment tank 20. As shown in FIG. 4, the eaves portion 60 includes a pair of first eaves 61, 61 disposed near the water surface of the microbubble treatment tank 20, and the first eaves 61 below the microbubble treatment tank 20. And a derivation rod 62 for discharging the foreign matter discharged from the second rod 63. The first rod 61 is opened upward and has an opening 65 in the direction of the second rod 63, the plane is formed in a rectangular shape, and three concave portions 64 are provided on the left and right wall surfaces, respectively. It has been. The first rod 61 is provided with an inclined surface that is inclined from the microbubble treatment tank 20 to the second rod 63 side. The second rod 63 is provided with an inclined surface inclined toward the lead rod 62 and has a semicircular cross section. Both the first troughs 61 are arranged at a location slightly away from the wall surface in the tank (for example, about 50 mm), so that the recovery of foam due to the fluctuation of the water surface during water circulation is made efficient. . Contaminants that are foam-separated with microbubbles near the water surface enter the first ridge 61 from the concave portion 64, pass through the first ridge 61 along the inclined surface, and then fall from the opening 65 to the second ridge 63, Proceeding in the direction of the lead-out rod 62 along the inclined surface, it is discarded outward.
マイクロバブル処理槽２０の一端側（移送用配管１４が設けられる側とは逆側）の下端には、ノズル２６が開放されており、ここには分離水を次槽に移送するための第１流路としての移送配管２７Ａが設けられている。移送配管２７Ａの途中には、第１閉止弁２８が設けられていると共に、この第１閉止弁２８を跨ぐようにして第１バイパス流路としてのバイパス配管２７Ｂが設けられている。バイパス配管２７Ｂは、サイフォン構造の一種であり、移送配管２７Ａよりも高い位置であり、かつマイクロバブル処理槽２０の最高水位よりも低い位置であって、循環用ポンプ２９がマイクロバブル処理槽２０内の水を循環可能な高さ位置に至ったときに、第１閉止弁２８を閉止した状態で、マイクロバブル処理槽２０によって処理済みの分離水を水頭圧でオゾン酸化処理槽３０に移送するようになっている。 A nozzle 26 is opened at the lower end of one end side (the side opposite to the side where the transfer pipe 14 is provided) of the microbubble treatment tank 20, and here a first for transferring the separated water to the next tank. A transfer pipe 27A as a flow path is provided. In the middle of the transfer pipe 27A, a first stop valve 28 is provided, and a bypass pipe 27B is provided as a first bypass flow path so as to straddle the first stop valve 28. The bypass pipe 27B is a kind of siphon structure, is a position higher than the transfer pipe 27A, and is a position lower than the maximum water level of the microbubble treatment tank 20, and the circulation pump 29 is located in the microbubble treatment tank 20. When the water reaches a position where the water can be circulated, the separated water treated by the microbubble treatment tank 20 is transferred to the ozone oxidation treatment tank 30 at the head pressure with the first shut-off valve 28 closed. It has become.
次のオゾン酸化処理槽３０には、バイパス配管２７Ｂの他端部が接続されて、分離水を受け入れるノズル３１と、オゾンを発生させるオゾン発生装置７０と、オゾンを吹き込むための循環ポンプ３９が設けられている。循環ポンプ３９には、オゾン酸化処理槽３０内の水を吸入するための吸入配管３２と、吸入された水にオゾンを吹き込みつつオゾン酸化処理槽３０内に戻す吐出配管３４が設けられている。オゾン発生装置７０からのオゾン供給管７２は、循環ポンプ３９の吐出管付近において、注入ノズル３３を介して連結されている。また、オゾン酸化処理槽３０には、前述の樋部６０と同構造のものが設けられている。また、オゾン酸化処理槽３０の一端側（バイパス配管２７Ｂが設けられる側とは逆側）の下端には、ノズル３５が開放されており、ここにはオゾン酸化処理槽３０にて処理済みの殺菌水を次槽に移送するための第２流路としての移送配管３６が設けられている。 The other ozone oxidation treatment tank 30 is connected to the other end of the bypass pipe 27B, and is provided with a nozzle 31 for receiving separated water, an ozone generator 70 for generating ozone, and a circulation pump 39 for blowing ozone. It has been. The circulation pump 39 is provided with a suction pipe 32 for sucking water in the ozone oxidation treatment tank 30 and a discharge pipe 34 for returning ozone into the ozone oxidation treatment tank 30 while blowing ozone into the sucked water. The ozone supply pipe 72 from the ozone generator 70 is connected through the injection nozzle 33 in the vicinity of the discharge pipe of the circulation pump 39. Further, the ozone oxidation treatment tank 30 is provided with the same structure as the above-described collar part 60. A nozzle 35 is opened at the lower end of one end side of the ozone oxidation treatment tank 30 (the side opposite to the side where the bypass pipe 27 </ b> B is provided). A transfer pipe 36 is provided as a second flow path for transferring water to the next tank.
移送配管３６の途中には、第２閉止弁３８が設けられており、この第２閉止弁３８を跨ぐようにして第２バイパス流路としてのバイパス配管３７が設けられている。これらの構造３６，３７，３８は、先に説明した構造２７Ａ，２７Ｂ，２８と同様の構造を備えたサイフォンの一種として作用する。こうして、第２閉止弁３８を閉止した状態で、オゾン酸化処理後の殺菌水は、水頭圧で活性炭ろ過槽４０に移送されるようになっている。
活性炭ろ過槽４０には、バイパス配管３７の他端部が接続されて、殺菌水を受け入れるノズル４１と、殺菌水をろ過する活性炭フィルタ４３が備えられている。活性炭フィルタ４３としては、粒状活性炭を繊維で包んだもの、ネットに木炭や竹炭を入れ、予め水洗し微粉末やゴミ等の汚れを取り除いた物をろ過槽内に敷き詰めたものなどのように、安価に入手可能なものが使用できる。
A second stop valve 38 is provided in the middle of the transfer pipe 36, and a bypass pipe 37 as a second bypass flow path is provided so as to straddle the second stop valve 38. These structures 36, 37, and 38 function as a kind of siphon having the same structure as the structures 27A, 27B, and 28 described above. Thus, the sterilized water after the ozone oxidation treatment is transferred to the activated carbon filtration tank 40 at the head pressure with the second closing valve 38 closed.
The activated carbon filtration tank 40 is provided with a nozzle 41 for receiving the sterilizing water and an activated carbon filter 43 for filtering the sterilizing water, to which the other end of the bypass pipe 37 is connected. As the activated carbon filter 43, such as what wrapped granular activated carbon with fibers, put charcoal or bamboo charcoal in a net, washed with water in advance to remove dirt such as fine powder and dust, etc. A cheaply available one can be used.
ノズル４１の活性炭ろ過槽４０側には、ろ過槽４０の底面側に配置される冠状の分流配管４２が連結されており、この分流配管４２の適所から上側に向かって分流管４４が設けられ、その分流管４４の先端に活性炭フィルタ４３が設けられている。こうして、オゾン酸化処理槽３０から移送された殺菌水は、活性炭ろ過槽４０への開口としての殺菌水導入路であるノズル４１と、分流配管４２と分流管４４とを介して活性炭フィルタ４３に連結されている。なお、活性炭フィルタ４３の上面は、バイパス配管４７の高さよりも低い位置となるように設定することが好ましい。こうして、殺菌水は、直ぐにろ過槽４０に溜められるのではなく、まず活性炭フィルタ４３によるろ過処理を受けた後に、再生水としてろ過槽４０に溜められることになる。
また、活性炭ろ過槽４０の一端側（バイパス配管３７が設けられる側とは逆側）の下端には、ノズル４５が開放されており、ここにはろ過槽４０にて処理済みの再生水を次の循環ポンプ槽５０に移送するための第３流路としての移送配管４６が設けられている。
A coronal branch pipe 42 disposed on the bottom surface side of the filtration tank 40 is connected to the activated carbon filtration tank 40 side of the nozzle 41, and a branch pipe 44 is provided upward from a proper position of the branch pipe 42. An activated carbon filter 43 is provided at the tip of the branch pipe 44. Thus, the sterilized water transferred from the ozone oxidation treatment tank 30 is connected to the activated carbon filter 43 via the nozzle 41 which is a sterilizing water introduction path as an opening to the activated carbon filtration tank 40, the diversion pipe 42 and the diversion pipe 44. Has been. The upper surface of the activated carbon filter 43 is preferably set so as to be at a position lower than the height of the bypass pipe 47. Thus, the sterilizing water is not immediately stored in the filtration tank 40, but is first subjected to a filtration treatment by the activated carbon filter 43 and then stored in the filtration tank 40 as reclaimed water.
Moreover, the nozzle 45 is open | released at the lower end of the one end side (the side opposite to the side in which the bypass piping 37 is provided) of the activated carbon filtration tank 40, and the reclaimed water processed in the filtration tank 40 here is the next A transfer pipe 46 as a third flow path for transferring to the circulation pump tank 50 is provided.
移送配管４６の途中には、第３閉止弁４８が設けられており、この第３閉止弁４８を跨ぐようにして第３バイパス流路としてのバイパス配管４７が設けられている。これらの構造４６，４７，４８は、先に説明した構造２７Ａ，２７Ｂ，２８と同様の構造を備えたサイフォンの一種として作用する。こうして、第３閉止弁４８を閉止した状態で、活性炭ろ過槽４０内の再生水は、水頭圧で循環ポンプ槽５０に移送されるようになっている。
循環ポンプ槽５０には、バイパス配管４７の一端側が接続されるノズル５１と、再生水を食品製造工場に移送するための水中ポンプ５２が設けられている。水中ポンプ５２には、吐出配管５３と、吐出流量を調整可能な水位調整弁５４が設けられている。
A third stop valve 48 is provided in the middle of the transfer pipe 46, and a bypass pipe 47 is provided as a third bypass flow path so as to straddle the third stop valve 48. These structures 46, 47 and 48 act as a kind of siphon having the same structure as the structures 27A, 27B and 28 described above. Thus, the reclaimed water in the activated carbon filtration tank 40 is transferred to the circulation pump tank 50 at the head pressure with the third stop valve 48 closed.
The circulation pump tank 50 is provided with a nozzle 51 to which one end side of the bypass pipe 47 is connected, and a submersible pump 52 for transferring reclaimed water to a food manufacturing factory. The submersible pump 52 is provided with a discharge pipe 53 and a water level adjustment valve 54 capable of adjusting the discharge flow rate.
次に、上記のように構成された排水処理システムによって、排水を処理するときの工程について説明する。なお、次の工程においては、約1000L容量の一次ろ過槽１０と、それぞれ約500L容量のマイクロバブル処理槽２０、オゾン酸化処理槽、及び活性炭ろ過槽４０を用いた。
＜一次ろ過工程＞
海生魚類の食品製造工場で回収された排水を移送配管１１を通じて適当な移送速度（例えば、10L/min）で一次ろ過槽１０に移送し、槽内のヤシ柄マット製の一次フィルタ１２により、排水中に含まれるゴミ・残渣類を一次ろ過した。このろ過水を水中ポンプ１９の駆動によって、配管１７，１４を通じて、マイクロバブル処理槽２０に転送した。ろ過水の転送速度は、排水の移送速度に整合させる（例えば、10L/min）ように、流量調整弁１３，１５の開度によって調整した。なお、余剰水は、循環用配管１６から一次ろ過槽１０に戻した。
Next, a process when wastewater is treated by the wastewater treatment system configured as described above will be described. In the next step, a primary filtration tank 10 having a capacity of about 1000 L, a microbubble treatment tank 20, an ozone oxidation treatment tank, and an activated carbon filtration tank 40 each having a capacity of about 500 L were used.
<Primary filtration process>
Wastewater collected in the marine fish food manufacturing plant is transferred to the primary filtration tank 10 at an appropriate transfer speed (for example, 10 L / min) through the transfer pipe 11, and the palm filter mat-made primary filter 12 in the tank is used. Wastes and residues contained in the waste water were primarily filtered. This filtered water was transferred to the microbubble treatment tank 20 through the pipes 17 and 14 by driving the submersible pump 19. The transfer rate of filtered water was adjusted by the opening degree of the flow rate adjusting valves 13 and 15 so as to match the transfer rate of drainage (for example, 10 L / min). Excess water was returned to the primary filtration tank 10 from the circulation pipe 16.
＜マイクロバブル処理工程＞
一次フィルタ１２で処理済みのろ過水をマイクロバブル処理槽２０に転送した。マイクロバブル処理槽２０（500L槽）の容量に対して、20％〜30％（500L槽の場合100L〜150L）の水位になった時点で、循環用ポンプ２９を起動させ、吸入配管２１からろ過水を吸入し、吐出配管２３からマイクロバブル処理槽２０に循環させた。その際、ノズル２６に連結される移送配管２７Ａの第１閉止弁２８は閉止状態とした。マイクロバブル処理槽２０の水位が30％以上になったところで、循環用ポンプ２９のノズル２２からオゾンガス（例えば10L/min処理の場合、オゾン発生量：12g/h、オゾンガス流量：2L/min、オゾン濃度：100g/Nm3）を注入つつ、マイクロバブルを発生させて、循環水の泡沫分離性を向上させた。泡沫分離処理された水（分離水）は、バッフルプレート２４下部に設けた潜り堰２５を流路として、ノズル２６から所定の高さ（例えば、500Lのマイクロバブル処理槽２０の場合、300L〜350L程度を水頭レベルとした配管高さ）に設けたバイパス配管２７Ｂを経て、次槽のオゾン酸化処理槽３０に転送した。
マイクロバブル処理槽２０内で泡沫分離されて、水表面に浮上してきた夾雑物は、槽内の両サイド喫水部に設置した樋部６０（泡沫浮遊物質回収トラフ（△ノッチ又は□ノッチ（凹部６４）をトラフ両サイドに開け、5%程度の勾配としたもの）を通じて、処理槽外部の第二樋６３及び導出樋６２から周辺の廃水ピット（図示せず）へ廃水した。第一樋６１は、槽内壁より約50mm程度離れた個所に設置し、水循環時の水面の揺動による泡沫の回収性を効率よくさせた。
<Microbubble treatment process>
The filtered water treated with the primary filter 12 was transferred to the microbubble treatment tank 20. When the water level reaches 20% to 30% (100L to 150L for the 500L tank) with respect to the capacity of the microbubble treatment tank 20 (500L tank), the circulation pump 29 is started and filtered from the suction pipe 21 Water was sucked and circulated from the discharge pipe 23 to the microbubble treatment tank 20. At that time, the first closing valve 28 of the transfer pipe 27A connected to the nozzle 26 was closed. When the water level in the microbubble treatment tank 20 reaches 30% or more, ozone gas (for example, in the case of 10 L / min treatment, ozone generation amount: 12 g / h, ozone gas flow rate: 2 L / min, ozone) from the nozzle 22 of the circulation pump 29. While injecting a concentration of 100 g / Nm 3 ), microbubbles were generated to improve the foam separation of circulating water. The foam-separated water (separated water) has a predetermined height from the nozzle 26 (for example, in the case of a 500-liter micro-bubble treatment tank 20, 300 L to 350 L) with the diving weir 25 provided at the lower part of the baffle plate 24 as a flow path. It was transferred to the ozone oxidation treatment tank 30 of the next tank via the bypass pipe 27B provided at the pipe height with the degree being the water head level).
Contaminants separated by foam in the micro-bubble treatment tank 20 and floating on the water surface are trapped parts 60 (foam suspended matter recovery trough (△ notch or □ notch (recess 64) provided on both sides of the tank). ) Was opened on both sides of the trough, and the slope was about 5%), and the wastewater was drained from the second rod 63 and the outlet rod 62 outside the treatment tank to a surrounding wastewater pit (not shown). It was installed at a location about 50mm away from the inner wall of the tank to improve the efficiency of foam recovery by rocking the water surface during water circulation.
＜オゾン酸化処理工程＞
バイパス配管２７Ｂを通じて、オゾン酸化処理槽３０に転送されてきた分離水は、ノズル３１から処理槽内に流入された後、上記マイクロバブル処理槽２０における循環用ポンプ２９の駆動水位と同様の水位（処理槽３０（500L槽）の容量に対して、20％〜30％の100L〜150L）になった時点で、循環ポンプ３９を起動させ、吸入配管３２から分離水を吸引し、吐出配管３４から処理槽３０に循環させた。その際、ノズル３６の途中に設けられている第２閉止弁３８は閉止状態とした。オゾン酸化処理槽３０の水位が30%以上になったところで、循環ポンプ３９の注入ノズル３３からオゾンガス（例えば10L/min処理の場合、オゾン発生量：18g/h、オゾンガス流量：3L/min、オゾン濃度100g/Nm3）を注入し、微生物などの殺菌処理を開始した。オゾン処理後の殺菌水は、所定の高さ（例えば、500Lの処理槽３０の場合、300L〜350L程度を水頭レベルとした配管高さ）に配置したバイパス配管３７を通じて、次の活性炭ろ過槽４０に転送されるようにした。また、前マイクロバブル処理槽２０からキャリーオーバーされた泡沫分離物質は、前マイクロバブル処理槽２０と同様に槽内の両サイド喫水部に設置した樋部６０を通じて導出樋６２から周辺の廃水ピット（図示せず）へ廃水した。
<Ozone oxidation treatment process>
The separated water transferred to the ozone oxidation treatment tank 30 through the bypass pipe 27B flows into the treatment tank from the nozzle 31, and then the same water level as the driving water level of the circulation pump 29 in the microbubble treatment tank 20 ( When the capacity of the processing tank 30 (500 L tank) reaches 20% to 30% (100 L to 150 L), the circulation pump 39 is started, and the separated water is sucked from the suction pipe 32 and discharged from the discharge pipe 34. It was circulated through the treatment tank 30. At that time, the second closing valve 38 provided in the middle of the nozzle 36 was closed. When the water level in the ozone oxidation treatment tank 30 becomes 30% or more, ozone gas (for example, in the case of 10 L / min treatment, ozone generation amount: 18 g / h, ozone gas flow rate: 3 L / min, ozone) from the injection nozzle 33 of the circulation pump 39. A concentration of 100 g / Nm 3 ) was injected and sterilization of microorganisms was started. The sterilized water after the ozone treatment passes through a bypass pipe 37 disposed at a predetermined height (for example, in the case of a 500 L treatment tank 30, a pipe height having a head level of about 300 L to 350 L). It was transferred to. In addition, the foam separation material carried over from the front microbubble treatment tank 20 is discharged from the outlet 62 to the surrounding waste water pit ( The wastewater was discharged to (not shown).
＜活性炭処理工程＞
バイパス配管３７を経て、活性炭ろ過槽４０に転送されてきた殺菌水は、ノズル４１から分流配管４２を通じて、各分流管４４の先端に設けた活性炭フィルタ４３に送り込んだ。活性炭フィルタ４３としては、分流管４４の配管口径が20Aの場合には、少なくとも穴径6〜8φmm程度の孔部を千鳥状に多数配置した配管に粒状活性炭を繊維で包んだフィルタ（例えば60φmm外径×250mmL、内筒径20A（27.2mm+1〜2mm））を挿管し、配管先端部をキャップ又はプラグで閉止したもの（先端部は取り外しが可能なVP配管を未接着状態とした）を用いた。活性炭フィルタ４３の上端面は、予め設定した最高水位の水頭レベル（例えば、500Lろ過槽４０の場合、300L〜350L程度を水頭レベルに設定する）下に位置するように設定した。活性炭フィルタ４３は、内部配管の先端部のキャップ又はプラグ部を取り外してフィルタ交換ができるようにした。活性炭フィルタ４３による処理後の再生水は、ノズル４５から適度な高さ（例えば500L活性炭ろ過槽４０の場合、300L〜350L程度を水頭レベルとした配管高さ）に設けたバイパス配管４７を経て、循環ポンプ槽５０に転送した。その際、移送配管４６の途中に設けた第３閉止弁４８は閉止状態とした。
<Activated carbon treatment process>
The sterilizing water transferred to the activated carbon filtration tank 40 through the bypass pipe 37 was sent from the nozzle 41 through the branch pipe 42 to the activated carbon filter 43 provided at the tip of each branch pipe 44. As the activated carbon filter 43, when the pipe diameter of the branch pipe 44 is 20A, a filter in which granular activated carbon is wrapped with fibers in a pipe in which a large number of holes having a hole diameter of about 6 to 8φ mm are arranged in a staggered manner (for example, 60φ mm outside) (Diameter x 250mmL, inner cylinder diameter 20A (27.2mm + 1 to 2mm)), pipe end closed with a cap or plug (tip detachable VP piping unbonded) Using. The upper end surface of the activated carbon filter 43 was set so as to be positioned below a preset water level at the highest water level (for example, in the case of the 500 L filtration tank 40, about 300 L to 350 L is set as the water head level). The activated carbon filter 43 was made to be able to replace the filter by removing the cap or plug at the tip of the internal pipe. Reclaimed water after treatment by the activated carbon filter 43 is circulated through a bypass pipe 47 provided at an appropriate height from the nozzle 45 (for example, in the case of a 500 L activated carbon filtration tank 40, a pipe height with a head level of about 300 L to 350 L). Transferred to pump tank 50. At that time, the third stop valve 48 provided in the middle of the transfer pipe 46 was closed.
＜循環工程＞
バイパス配管４７を経由してノズル５１から循環ポンプ槽５０に張り込まれた再生水は、ポンプ槽５０の水位が30%以上になった時点で、水中ポンプ５２を運転することで吐出配管５３から食品製造工場に移送できる。吐出配管５３からの吐出量は循環ポンプ槽５０の水位（例えば、500L循環ポンプ槽の場合、300L〜350L程度のレベル）が安定するように、レベル調整弁５４の開度を調整しながら設定した。
なお、排水処理システムの稼働終了後には、各槽及び配管類の洗浄操作を行った。このとき、各槽１０，２０，３０，４０の出口側の配管１４，２７Ａ，３８，４６に設置するバルブ１３，２８，３８，４８を開放することにより、上流側から各槽内を洗浄した廃水を各槽内に滞留させることなく、最下流の循環ポンプ槽５０に移送させた後、水中ポンプ５２の吐管に仮設ホースを設置して、廃水ピット（図示せず）に導くことで、排水処理システム全体の連続清水置換が可能な構造となっている。
<Circulation process>
When the water level in the circulating pump tank 50 from the nozzle 51 via the bypass pipe 47 reaches 30% or higher, the reclaimed water is operated from the discharge pipe 53 by operating the submersible pump 52. Can be transferred to the manufacturing plant. The discharge amount from the discharge pipe 53 was set while adjusting the opening of the level adjustment valve 54 so that the water level of the circulation pump tank 50 (for example, a level of about 300L to 350L in the case of a 500L circulation pump tank) is stabilized. .
In addition, washing operation of each tank and piping was performed after completion | finish of operation of a waste water treatment system. At this time, the inside of each tank was washed from the upstream side by opening the valves 13, 28, 38, 48 installed in the pipes 14, 27A, 38, 46 on the outlet side of each tank 10, 20, 30, 40. By transferring wastewater to the most downstream circulation pump tank 50 without staying in each tank, installing a temporary hose on the discharge pipe of the submersible pump 52 and guiding it to a wastewater pit (not shown), It has a structure that allows continuous clean water replacement of the entire wastewater treatment system.
上記＜一次ろ過工程＞〜＜活性炭処理工程＞を実施することにより、海産物の食品製造工場の加工工程で生じた排水（血水成分である油分やタンパク物質等を含有する血水混じりの茶褐色排水（COD=115mg/L、TOC(全有機炭素)=55mg/L、色度≧50、濁度≧50、一般細菌数=1.2×104、大腸菌群数=50））を再使用可能な再生水（COD=63mg/L、TOC=41mg/L、色度=10、濁度=10、一般細菌数≦100、大腸菌群数：陰性）とすることができた。なお、処理する工場排水の汚れ度合いに応じて、マイクロバブル循環量及びオゾンガス注入量を調整することにより、各種の排水処理を行える。 By implementing the above <Primary Filtration Step> to <Activated Carbon Treatment Step>, wastewater generated in the processing process of the seafood food manufacturing plant (brown water drainage (COD mixed with blood and water containing oil and protein substances, which are blood water components) = 115 mg / L, TOC (total organic carbon) = 55 mg / L, chromaticity ≥ 50, turbidity ≥ 50, general bacterial count = 1.2 x 10 4 , coliform count = 50)) = 63 mg / L, TOC = 41 mg / L, chromaticity = 10, turbidity = 10, general bacterial count ≤ 100, coliform group number: negative). Various wastewater treatments can be performed by adjusting the microbubble circulation amount and the ozone gas injection amount according to the degree of contamination of the factory wastewater to be treated.
このように、本実施形態によれば、食品製造工場の加工工程から排出される排水を殺菌浄化し、再利用することができたので、使用水の削減と、排水される水質の向上、すなわち排水処理装置入口原水の水質向上による負荷軽減から凝集剤や薬品類のコスト削減に寄与する川上型の排水浄化システムであり、先進的な環境浄化と産業上の利用に貢献することができた。
また、排水中に浮遊するゴミ・残渣類の捕獲に使用する一次フィルタ（ヤシ柄マット）と懸濁物を除去する活性炭フィルタは、汎用品であり、安価かつ安定供給が可能である。このため、排水処理システムの実施に要する媒体として、薬品等は一切使用せず、ポンプ類を回す電気のみを必要としたローコストシステムを提供できた。
こうして、本実施形態によれば、食品製造工場内の施設で生じる排水を連続的に、短時間かつ大量に処理して、再利用可能な再生水とするシステムを提供することができた。
Thus, according to this embodiment, since the wastewater discharged from the processing process of the food manufacturing factory could be sterilized and reused, it was possible to reduce the amount of water used and improve the quality of the drained water, that is, This is an upstream-type wastewater purification system that contributes to reducing the cost of flocculants and chemicals by reducing the load by improving the quality of the raw water at the inlet of the wastewater treatment equipment, and was able to contribute to advanced environmental purification and industrial use.
Moreover, the primary filter (palm pattern mat) used for capturing the dust and residues floating in the waste water and the activated carbon filter for removing the suspended matter are general-purpose products and can be supplied inexpensively and stably. For this reason, it was possible to provide a low-cost system that did not use any chemicals or the like as a medium required for the implementation of the wastewater treatment system, and required only electricity to turn pumps.
Thus, according to the present embodiment, it was possible to provide a system that can continuously process a large amount of waste water generated in a facility in a food manufacturing factory in a short time and make it reusable recycled water.
１０…一次ろ過槽
１２…一次フィルタ（ヤシ柄マット）
２０…マイクロバブル処理槽
２７Ａ…移送配管（第１流路）
２７Ｂ…バイパス配管（第１バイパス流路）
２８…第１閉止弁
２９…循環用ポンプ（マイクロバブル発生装置、第１循環ポンプ）
３０…オゾン酸化処理槽
３６…移送配管（第２流路）
３７…バイパス配管（第２バイパス流路）
３８…第２閉止弁
３９…循環ポンプ（第２循環ポンプ）
４０…活性炭ろ過槽
４１…ノズル（殺菌水導入路）
４２…分流配管（殺菌水導入路）
４３…活性炭フィルタ（活性炭）
４４…分流管（殺菌水導入路）
６０…樋部
７０…オゾン発生装置
10 ... Primary filtration tank 12 ... Primary filter (palm pattern mat)
20 ... Microbubble treatment tank 27A ... Transfer piping (first flow path)
27B ... Bypass piping (first bypass flow path)
28 ... 1st shut-off valve 29 ... Circulation pump (microbubble generator, 1st circulation pump)
30 ... Ozone oxidation treatment tank 36 ... Transfer pipe (second flow path)
37. Bypass piping (second bypass flow path)
38 ... 2nd stop valve 39 ... Circulation pump (2nd circulation pump)
40 ... Activated carbon filtration tank 41 ... Nozzle (sterilization water introduction path)
42 ... Diversion pipe (sterilization water introduction path)
43 ... Activated carbon filter (activated carbon)
44 ... Diversion pipe (sterilization water introduction path)
60 ... Buttocks 70 ... Ozone generator
Claims (3)
前記排水を通過させることでゴミ・残渣類を除去してろ過水とする一次フィルタを備えた一次ろ過槽と、この一次ろ過槽に連結され、前記ろ過水に送り込むマイクロバブルを発生させるマイクロバブル発生装置を備え、前記ろ過水を泡沫分離して分離水とするマイクロバブル処理槽と、このマイクロバブル処理槽に連結され、前記分離水に吹き込むオゾンを発生させるオゾン発生装置を備え、前記分離水を酸化処理して殺菌水とするオゾン酸化処理槽と、このオゾン酸化処理槽に連結され、前記殺菌水を処理する活性炭フィルタを備え、前記殺菌水を活性炭で処理して再生水とする活性炭ろ過槽とを備え、
前記マイクロバブル処理槽には、この処理槽内の水を循環させる第１循環ポンプが設けられており、前記オゾン酸化処理槽には、この処理槽内の水を循環させる第２循環ポンプが設けられており、
前記マイクロバブル処理槽と前記オゾン酸化処理槽との間には第１閉止弁を設けた第１流路が設けられ、この第１流路には前記マイクロバブル処理槽の最高水位よりも低い位置であり、かつ当該第１流路よりも高い位置であって前記第１循環ポンプがマイクロバブル処理槽内の水を循環させられる位置に至ったときに前記第１閉止弁の閉止時において前記分離水を水頭圧で前記マイクロバブル処理槽から前記オゾン酸化処理槽に移送する第１バイパス流路が設けられていると共に、前記オゾン酸化処理槽と前記活性炭ろ過槽との間には第２閉止弁を設けた第２流路が設けられ、この第２流路には前記オゾン酸化処理槽の最高水位よりも低い位置であり、かつ当該第２流路よりも高い位置であって前記第２循環ポンプがオゾン酸化処理槽内の水を循環させられる位置に至ったときに前記第２閉止弁の閉止時において前記殺菌水を水頭圧で前記オゾン酸化処理槽から前記活性炭ろ過槽に移送する第２バイパス流路が設けられていることを特徴とする排水処理システム。 A wastewater treatment system for obtaining reclaimed water by treating wastewater generated in a processing process of a food manufacturing factory,
A primary filtration tank equipped with a primary filter that removes dust and residues by passing the waste water to make filtered water, and microbubble generation that is connected to the primary filtration tank and generates microbubbles that are fed into the filtered water A micro-bubble treatment tank comprising a device for separating the filtered water into foam and separating water, and an ozone generator connected to the micro-bubble treatment tank and generating ozone to be blown into the separation water. An ozone oxidation treatment tank that is oxidized to be sterilized water, an activated carbon filter tank that is connected to the ozone oxidation treatment tank, includes an activated carbon filter that treats the sterilized water, and treats the sterilized water with activated carbon to obtain reclaimed water; With
The microbubble treatment tank is provided with a first circulation pump for circulating the water in the treatment tank, and the ozone oxidation treatment tank is provided with a second circulation pump for circulating the water in the treatment tank. It is and,
A first flow path provided with a first shut-off valve is provided between the microbubble treatment tank and the ozone oxidation treatment tank, and the first flow path is at a position lower than the highest water level of the microbubble treatment tank. And when the first shutoff valve is closed when the first circulation pump reaches a position where the water in the microbubble treatment tank can be circulated, which is higher than the first flow path. A first bypass flow path for transferring water from the microbubble treatment tank to the ozone oxidation treatment tank at a water head pressure is provided, and a second closing valve is provided between the ozone oxidation treatment tank and the activated carbon filtration tank. The second flow path is provided at a position lower than the highest water level of the ozone oxidation treatment tank and at a position higher than the second flow path. The pump is water in the ozone oxidation treatment tank That the second bypass flow path for transferring the activated carbon filter tank from the ozone oxidation processing tank the sterilizing water in the water head pressure at the time of closure of the second shut-off valve is provided when reaches the position to be circulated A featured wastewater treatment system.
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