JP3860847B2

JP3860847B2 - Photo-oxidation water treatment equipment with microbiological pre-treatment and post-treatment

Info

Publication number: JP3860847B2
Application number: JP04994095A
Authority: JP
Inventors: 嘉照夫比; 崎史朗宮
Original assignee: 株式会社Ｅｍ研究機構
Priority date: 1995-03-09
Filing date: 1995-03-09
Publication date: 2006-12-20
Anticipated expiration: 2021-12-20
Also published as: JPH08243592A

Description

【０００１】
【発明の背景】
発明の分野
本発明は、紫外線による光酸化によって水を処理する水処理装置に関し、さらに詳しくは紫外線による光酸化によって水を処理する水処理装置における微生物学的な前処理および／または後処理に関する。
【０００２】
背景技術
ほとんどの物質は紫外線領域に吸収を持ち、その結果、光反応、光イオン化、生理作用、殺菌作用などが生じる。従って、下水、洗浄排水、または使用前の水に紫外線を照射することで、その中に含まれる有機物、微生物などを分解し、低分子化して水質の浄化を図ることが出来る。このような装置は、光酸化処理装置、紫外線酸化水処理装置などと呼ばれて広く知られている。
【０００３】
【発明の概要】
本発明者らは、今般、光酸化処理装置と、被処理水を特定の微生物群と接触させる前処理および／または後処理とを組み合わせることで、より効率の良い水処理が出来ることを見出した。本発明はかかる知見に基づくものである。
【０００４】
従って、本発明は、より効率の良い水処理が可能な紫外線酸化処理装置の提供をその目的としている。
【０００５】
本発明による光酸化水処理装置は、
被処理水に紫外線を照射する光酸化部、
該光酸化部に導かれる前の被処理水を、放線菌、光合成細菌、乳酸生成菌、糸状菌、および酵母の５つの群のそれぞれから少なくとも一種ずつ選択された、少なくとも計５種からなる微生物群と接触させる前処理部、および／または
該光酸化部で処理された後の被処理水を、放線菌、光合成細菌、乳酸生成菌、糸状菌、および酵母の５つの群のそれぞれから少なくとも一種ずつ選択された、少なくとも計５種からなる微生物群と接触させる後処理部
を備えてなるもの、である。
【０００６】
【発明の具体的説明】
本発明による水処理装置によれば、被処理水のＣＯＤおよびＢＯＤの低減、含有有機物の分解、殺菌処理、殺藻処理を効率よく行うことが出来る。本発明による水処理装置は、種々の水系排水の浄化処理、一次利用水、二次利用水の浄化処理などに適用できる。その具体例としては、家庭および店舗排水の処理；精密機械加工における脱脂洗浄排水処理；メッキ処理におけるシアン排水処理；プリント配線基板製造における無電解Ｎｉメッキ浴排水、液体レジスト現像排水処理；染色加工における有機染料排水処理；半導体製造または液晶製造などにおける超純水処理の前処理；下水処理水の再利用のための処理；工業用循環水の処理；有機塩素系溶剤、アルコール、炭化水素などの有機物を多量に含んだ排水の有機物分解処理；ゴルフ場排水の処理；池水、湖水、沼水などの浄化処理；その他高ＣＯＤおよび高ＢＯＤの有機系排水処理等が挙げられる。
【０００７】
本発明による水処理装置の光酸化部は、紫外線の酸化力により、有機物を分解、低分子化する機能を備えたものであれば、特に限定されない。好ましくは、被処理水に過酸化水素、次亜塩素酸ナトリウム、オゾンなどの酸化剤を添加して、その後処理水に紫外線を照射する態様が好ましい。この態様においては、紫外線の照射により酸化剤が活性化され、ヒドロキシラジカルなどが発生し、これにより処理水中の有機物は酸化分解され、低分子化される。さらに、酸化剤を活性化させる触媒を存在させてもよい。
【０００８】
本発明の第一の態様による水処理装置は、この光酸化部に導かれる前の被処理水を、生物学的に前処理する。生物学的前処理は、この被処理水を、放線菌、光合成細菌、乳酸生成菌、糸状菌、および酵母の５つの群のそれぞれから少なくとも一種ずつ選択された、少なくとも計５種からなる微生物群と接触させることによって行われる。
【０００９】
本発明に用いられる微生物の好ましい具体例を挙げれば次の通りである。
放線菌に属するものとしては、Streptomyces、Streptoverticillium 、Nocardia、Micromonospora、Rhodococcus などの属に属する微生物が挙げられ、より具体的にはStreptomyces albus (e.g. ATCC 3004) 、Streptoverticillium baldaccii (e.g. ATCC 23654) 、Nocardia asteroides (e.g. ATCC 19247) 、Micromonospora chalcea (e.g. ATCC 12452)、Rhodococcus rhodochrous(e.g. ATCC 13803)などが挙げられる。
【００１０】
光合成細菌に属するものとしては、Rhodopseudomonas、Rhodospirillum、Chromatium、Chlorobiumなどの属に属する微生物が挙げられ、より具体的にはRhodopseudomonas sphaeroides (e.g. IFO 12203) 、Rhodospirillum rubrum (e.g. IFO 3986) 、Chromatium okenii 、Chlorobium limicola などが挙げられる。
【００１１】
乳酸生成菌に属するものとしては、Lactobacillus 、Propionibacterium 、Pediococcus 、Streptococusなどの属に属する微生物が挙げられ、より具体的にはLactobacillus bulgaricus (e.g. ATCC 11842)、Propionibacterium freudenreichii (e.g. IFO 12391) 、Pediococcus halophilus (e.g. IFO 12172) 、Streptococus lactis (e.g. IFO 12007)、Storeptococus faecalis (e.g. IFO 3971)などが挙げられる。
【００１２】
糸状菌に属するものとしては、Aspergillus 、Mucor などの属に属する微生物が挙げられ、より具体的にはAspergillus japonicus (e.g. IFO 4060) 、Aspergillus oryzae (e.g IFO 4075) 、Mucor hiemalis (e.g. IFO 5303)などが挙げられる。
【００１３】
酵母に属するものとしては、Saccharomyces 、Candida などの属に属する微生物が挙げられ、より具体的にはSaccharomyces cerevisiae (e.g. IFO 0304)、Saccharomyces lactis (e.g. IFO 0433)、Candida utilis (e.g. IFO 0396)などが挙げられる。
【００１４】
本発明において５つの群からそれぞれ選ばれる微生物は一種でも複数でも良い。本発明のより好ましい態様によれば、複数の微生物を組み合わせて用いるのが好ましい。これらの微生物は、それらの微生物の通常の条件で培養されてよい。
【００１５】
このような生物学的前処理によって、後段の光分解による処理がより効率よく行われる。以下の理論に拘束されるわけではないが、この前処理によって、被処理水中に存在する有機物などの固形成分は微生物によって、後段の光分解において効率よく分解され得る大きさの分子まで分解されるのが理由と思われる。
【００１６】
微生物と被処理水の接触の態様は特に限定されないが、本発明の好ましい態様によれば、微生物を多孔質体に単持させ、その多孔質体と被処理水とを接触させることで実施されてよい。この多孔質体は、微生物が生息可能であれば特に限定されないが、例えば粘土鉱物を焼結して得られた連続気孔を有する多孔質セラミック、木炭、合成繊維からなるフェルト、合成樹脂からなる多孔板、多段に重ねた合成樹脂板などを好ましく利用することが出来る。
【００１７】
本発明の第二の態様による水処理装置は、光酸化部で処理された後の処理水を、生物学的に後処理する。生物学的後処理は、この処理水を、放線菌、光合成細菌、乳酸生成菌、糸状菌、および酵母の５つの群のそれぞれから少なくとも一種ずつ選択された、少なくとも計５種からなる微生物群と接触させることによって行う。
【００１８】
この態様に用いられる微生物の好ましい具体例としては、上記した生物学的前処理に用いられるものが挙げられる。さらに、微生物と被処理水の接触の態様は特に限定されないが、本発明の好ましい態様によれば、上記した生物学的前処理と同様の態様が挙げられる。
【００１９】
このような生物学的後処理によって、光酸化部で処理された処理水に存在する有機物をより完全に分解することが出来る。さらに従来、このような光酸化部で処理された処理水の後処理として活性炭による濾過処理が知られているが、本発明によれば、この活性炭と上記微生物群を組み合わせることで、この活性炭の濾過能力を長期間に亘り維持することが可能であるとの利点が得られる。
【００２０】
本発明の第三の態様による水処理装置は、上記の第一の態様および第二の態様を組み合わせたもの、すなわち生物学的前処理と、生物学的後処理をともに備えてなるものである。この態様による水処理装置によれば、より効率のよい水処理を行うことが出来る。
【００２１】
本発明による水処理装置を図面を用いて説明する。図１は、本発明による水処理装置を表す。被処理水はタンク１に導入路２を介して投入される。このタンク１内のｐＨ、温度などの状態は、センサー手段３を設けて知ることができるよう構成してもよい。このタンク１の被処理水はポンプ４によりバルブ５を介して前処理槽６に導入される。この前処理槽６の断面図を図２に示す。この前処理槽６は、容器７とその中に充填された多孔質床８とから構成されている。そしてこの多孔質床８には上記した微生物群が担持されている。被処理水は導管１０から入り多孔質床８の間隙９を流れる。その間、被処理水中に存在する有機物などは多孔質床８に吸着される。そして、微生物群により分解され、低分子化される。さらに場合によって、バルブ２６および２７を切り替えて、被処理水を循環路２８を経由させて循環処理することも可能である。その後被処理水は導管１１から前処理槽６を出る。前処理を受けた被処理水は、次に貯留タンク１２に至り溜め置かれ、その後光酸化処理を受ける。
【００２２】
光酸化処理は次のように行われる。貯留タンク１２に溜め置かれた被処理水に、酸化剤タンク１３からの酸化剤を、投入装置１４を用いて貯留タンク１２に投入する。貯留タンク１２中で被処理水を攪拌するなどして酸化剤と被処理水を十分に混合する。酸化剤と混合された被処理水は、バルブ１５が開けられ、ポンプ１６によって触媒槽１７に至る。触媒槽１７内には触媒層が設けられてなる。この触媒層は光酸化処理に用いられている触媒層であってよく、例えばニッケル化合物、鉄化合物、チタン化合物からなり、充填構造をとるのが好ましい。また、この触媒層は光酸化部と一体に構成されてよい。この触媒槽によって酸化剤が活性化され、その後被処理水は光酸化部１８に至る。この光酸化部１８は、容器１９と、その内部に収容された紫外線ランプ２０とから構成される。被処理水は容器１９内に入ると、紫外線ランプ２０から紫外線の照射を受ける。被処理水に存在する有機物、微生物などは紫外線により分解され、低分子化される。これにより、被処理水の浄化、殺菌などが達成される。光酸化部１８を出た被処理水はバルブ２１を介して再び貯留タンク１２に至る。本発明の好ましい態様によれば、このような光酸化処理を処理水を循環させて一定時間継続して行う。酸化剤を適宜追加しながら行うことも好ましい。被処理水の浄化の程度は、センサー２２を設け、これによって監視しながら行うことも可能である。目的とする被処理水の浄化の程度が達成できたならば、次に被処理水を後処理に付す。
【００２３】
バルブ２１を閉めバルブ２３を開けることで、被処理水を後処理槽２４に導く。ここで、この後処理槽２４は基本的に前処理槽６と同一の構成とされてよい。すなわち、この後処理槽は容器内に上記した微生物群を担持させた多孔質床を収容して構成されてよい。本発明の好ましい態様によれば、この後処理槽２４の多孔質床は活性炭によって構成されるのが好ましい。被処理水はこの後処理槽２４内において、多孔質床の間隙を通過し、その際被処理水内に残存している有機物などが多孔質床に吸着される。吸着された有機物は多孔質床に担持された微生物により分解され、低分子化される。これによって被処理水のより完全な浄化が達成される。
【００２４】
本発明の好ましい態様によれば、貯留タンク１２の底部に多孔質床２５を形成してもよい。この多孔質床２５に微生物が生息し、その結果、被処理水を貯留している間に有機物の分解、低分子化が行なわれ、光酸化による水の浄化を補助することが出来る。
【００２５】
上記の装置において、前処理槽および後処理槽の大きさ、光酸化部の紫外線ランプの出力などは被処理水の種類および量、光酸化処理時に光酸化部を通過する被処理水の流量などを勘案して適宜決定されてよい。本発明の好ましい態様によれば、ポリオキシエチレン（ＯＰＥ）系洗浄液含有排水（ＣＯＤ３００ｍｇ／ｌ）のような排水の場合、前処理槽における多孔質床を１００リットル、後処理槽における活性炭からなる多孔質床を１００リットル³、紫外線ランプの出力を２ｋｗ、紫外線酸化部に導入される被処理水の循環流量を１．８ｍ³／時としたとき、約１２５リットル／時程度の量の排水処理を行うことが出来る。
【００２６】
【実施例】
実施例１
図１に記載の装置と同一の装置を用いて水処理を行った。紫外線の出力は２ｋＷとし、酸化剤は３５％過酸化水素水を下記の表に記載の量添加した。前処理槽は、次の微生物群を、粘土鉱物を主原料に高温焼結して得られた連続気孔を有する多孔質セラミック担体（比重０．４〜０．５、吸水率１７０％以上、気孔率７５％以上、表面積２ｍ²／ｇ）に担持させたものを使用した。
【００２７】
微生物群
放線菌：Streptomyces albus (ATCC 3004) 、Streptoverticillium baldaccii (ATCC 23654) 、Nocardia asteroides (ATCC 19247) 、Micromonospora chalcea (ATCC 12452) 、Rhodococcus rhodochrous(ATCC 13803) 。
光合成細菌：Rhodopseudomonas sphaeroides (IFO 12203) 、Rhodospirillum rubrum (IFO 3986) 、Chromatium okenii 、Chlorobium limicola 。
乳酸生成菌：Lactobacillus bulgaricus (ATCC 11842) 、Propionibacterium freudenreichii (IFO 12391) 、Pediococcus halophilus (IFO 12172) 、Streptococus lactis (IFO 12007) 、Storeptococus faecalis (IFO 3971) 。
糸状菌：Aspergillus japonicus (IFO 4060) 、Aspergillus oryzae (IFO 4075) 、Mucor hiemalis (IFO 5303) 。
酵母：Saccharomyces cerevisiae (IFO 0304) 、Saccharomyces lactis (IFO 0433) 、Candida utilis (IFO 0396) 。
【００２８】
上記の装置に原排水として種々のＣＯＤ値を有するＰＯＥ系洗浄液含有排水を導入し、３０リットル／分の流量で原排水を前処理槽６に導入した。処理水３０リットルを貯留槽１２に貯留し、その後光酸化処理を行った。光酸化槽を循環させる際の流量は１０リットル／分、処理時間は１時間とした。
原排水、および光酸化処理前後の貯留槽１２の処理水のＣＯＤ値を測定した。
また、更に前処理装置を有さない、光酸化槽のみによる処理も行った。
それらの結果は、次の表に示される通りであった。
【００２９】

【００３０】
実施例２
実施例１と同様の装置によってＰＯＥ系洗浄液含有排水を処理し、前処理および光酸化処理によりＣＯＤ値１２ｐｐｍの処理水を得た。この処理水を、多孔質セラミック担体を粒状活性炭に代えた以外は実施例１の前処理装置と同様の後処理装置に、１０リットル／分の流量で導入した。この後処理後の処理水のＣＯＤ値を測定し、その値が１２ｐｐｍとなるまでの時間を測定した。
また、上記微生物を担持させなかった以外は上記と同様の後処理装置を構成し、これに上記と同様の排水を１０リットル／分の流量で導入した。この場合も、この後処理後の処理水のＣＯＤ値を測定し、その値が１２ｐｐｍとなるまでの時間を測定した。
それらの結果は、次の表に示される通りであった。
【００３１】

【図面の簡単な説明】
【図１】本発明による光酸化水処理装置の全体の模式図である。
【図２】本発明による光酸化水処理装置の前処理槽または後処理槽の断面図である。
【符号の説明】
１貯留槽
６前処理槽
７容器
８多孔質床
１２貯留槽
１３酸化剤槽
１４酸化剤投入装置
１７触媒槽
１８光酸化部
２０紫外線ランプ
２４後処理槽[0001]
BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION The present invention relates to a water treatment device for treating water by photooxidation with ultraviolet rays, and more particularly, for microbiological pretreatment and / or in a water treatment device for treating water by photooxidation with ultraviolet rays. Regarding post-processing.
[0002]
Background art Most substances have absorption in the ultraviolet region, resulting in photoreaction, photoionization, physiological action, bactericidal action and the like. Therefore, by irradiating ultraviolet rays to sewage, washing waste water, or water before use, organic substances, microorganisms and the like contained therein can be decomposed and reduced in molecular weight to purify water quality. Such an apparatus is widely known as a photo-oxidation treatment apparatus, an ultraviolet oxidation water treatment apparatus, or the like.
[0003]
Summary of the Invention
The present inventors have now found that more efficient water treatment can be achieved by combining a photo-oxidation treatment apparatus and pretreatment and / or posttreatment in which treated water is brought into contact with a specific microorganism group. . The present invention is based on such knowledge.
[0004]
Accordingly, an object of the present invention is to provide an ultraviolet oxidation treatment apparatus capable of more efficient water treatment.
[0005]
The photo-oxidized water treatment apparatus according to the present invention comprises:
A photo-oxidation part that irradiates the water to be treated with ultraviolet rays,
Microorganisms comprising at least five species in total, wherein the water to be treated before being led to the photooxidation unit is selected from at least one of each of the five groups of actinomycetes, photosynthetic bacteria, lactic acid producing bacteria, filamentous fungi, and yeasts At least one kind of each of the five groups of actinomycetes, photosynthetic bacteria, lactic acid producing bacteria, filamentous fungi, and yeast is treated with the pretreatment unit to be brought into contact with the group and / or treated water after the photooxidation unit. Each is provided with a post-processing unit that is selected and brought into contact with a group of at least five types of microorganisms.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
According to the water treatment device of the present invention, it is possible to efficiently perform COD and BOD reduction of treated water, decomposition of contained organic substances, sterilization treatment, and algaecidal treatment. The water treatment apparatus according to the present invention can be applied to purification treatments of various aqueous drainage, purification treatment of primary usage water, secondary usage water, and the like. Specific examples include household and store wastewater treatment; degreasing cleaning wastewater treatment in precision machining; cyan wastewater treatment in plating treatment; electroless Ni plating bath wastewater in printed wiring board manufacturing, liquid resist development wastewater treatment; Organic dye wastewater treatment; Pretreatment of ultrapure water treatment in semiconductor production or liquid crystal production; Treatment for reuse of sewage treated water; Treatment of industrial circulating water; Organic substances such as organic chlorinated solvents, alcohols and hydrocarbons Organic matter decomposition treatment of wastewater containing a large amount of water; treatment of wastewater from golf courses; purification treatment of pond water, lake water, swamp water, etc .; organic wastewater treatment of other high COD and high BOD, etc.
[0007]
The photo-oxidation part of the water treatment apparatus according to the present invention is not particularly limited as long as it has a function of decomposing and reducing the molecular weight of organic substances by the oxidizing power of ultraviolet rays. Preferably, an aspect in which an oxidizing agent such as hydrogen peroxide, sodium hypochlorite, ozone, or the like is added to the water to be treated and then the ultraviolet rays are irradiated to the treated water is preferable. In this embodiment, the oxidizing agent is activated by irradiation with ultraviolet rays to generate hydroxy radicals, etc., whereby the organic matter in the treated water is oxidatively decomposed and reduced in molecular weight. Further, a catalyst for activating the oxidizing agent may be present.
[0008]
The water treatment apparatus according to the first aspect of the present invention biologically pretreats the water to be treated before being led to the photooxidation unit. In the biological pretreatment, this treated water is selected from at least one of each of the five groups of actinomycetes, photosynthetic bacteria, lactic acid producing bacteria, filamentous fungi, and yeast. Done by contacting with.
[0009]
Preferred specific examples of the microorganism used in the present invention are as follows.
Examples of the actinomycetes include microorganisms belonging to genera such as Streptomyces, Streptoverticillium, Nocardia, Micromonospora, Rhodococcus, and more specifically, Streptomyces albus (eg ATCC 3004), Streptoverticillium baldaccii (eg ATCC 23654), Nocardia asteroides (eg ATCC 19247), Micromonospora chalcea (eg ATCC 12452), Rhodococcus rhodochrous (eg ATCC 13803), and the like.
[0010]
Examples of the photosynthetic bacteria include microorganisms belonging to the genera such as Rhodopseudomonas, Rhodospirillum, Chromatium, Chlorobium, and more specifically Rhodopseudomonas sphaeroides (eg IFO 12203), Rhodospirillum rubrum (eg IFO 3986), Chromatium orobii, limicola.
[0011]
Examples of lactic acid-producing bacteria include microorganisms belonging to genera such as Lactobacillus, Propionibacterium, Pediococcus, Streptococus, and more specifically, Lactobacillus bulgaricus (eg ATCC 11842), Propionibacterium freudenreichii (eg IFO 12391), Pediococcus halophilus eg IFO 12172), Streptococus lactis (eg IFO 12007), Storeptococus faecalis (eg IFO 3971) and the like.
[0012]
Examples of filamentous fungi include microorganisms belonging to genera such as Aspergillus, Mucor, and more specifically Aspergillus japonicus (eg IFO 4060), Aspergillus oryzae (eg IFO 4075), Mucor hiemalis (eg IFO 5303), etc. Is mentioned.
[0013]
Examples of those belonging to yeast include microorganisms belonging to genera such as Saccharomyces and Candida, and more specifically, Saccharomyces cerevisiae (eg IFO 0304), Saccharomyces lactis (eg IFO 0433), Candida utilis (eg IFO 0396) and the like. Can be mentioned.
[0014]
In the present invention, one or more microorganisms may be selected from each of the five groups. According to a more preferred embodiment of the present invention, it is preferable to use a combination of a plurality of microorganisms. These microorganisms may be cultured under the normal conditions of those microorganisms.
[0015]
By such biological pretreatment, the subsequent photolysis is performed more efficiently. Although not bound by the following theory, this pretreatment decomposes solid components such as organic matter present in the water to be treated into molecules of a size that can be efficiently decomposed by subsequent photolysis by microorganisms. The reason seems to be.
[0016]
The mode of contact between the microorganism and the water to be treated is not particularly limited, but according to a preferred embodiment of the present invention, the microorganism is held in a porous body, and the porous body and the water to be treated are brought into contact with each other. It's okay. The porous body is not particularly limited as long as microorganisms can inhabit it. For example, porous ceramics having continuous pores obtained by sintering clay minerals, charcoal, felt made of synthetic fibers, and porous made of synthetic resins. A plate, a synthetic resin plate stacked in multiple stages, and the like can be preferably used.
[0017]
The water treatment apparatus according to the second aspect of the present invention biologically post-treats the treated water after being treated in the photooxidation unit. In the biological post-treatment, the treated water is treated with at least one microbial group consisting of at least one selected from each of the five groups of actinomycetes, photosynthetic bacteria, lactic acid producing bacteria, filamentous fungi, and yeast. This is done by contact.
[0018]
Preferable specific examples of the microorganism used in this embodiment include those used in the biological pretreatment described above. Furthermore, although the aspect of contact with microorganisms and to-be-processed water is not specifically limited, According to the preferable aspect of this invention, the aspect similar to the biological pretreatment mentioned above is mentioned.
[0019]
By such biological post-treatment, organic substances present in the treated water treated in the photooxidation part can be more completely decomposed. Further, conventionally, filtration treatment with activated carbon is known as a post-treatment of the treated water treated in such a photo-oxidation part. According to the present invention, by combining this activated carbon and the above microorganism group, The advantage is obtained that the filtration capacity can be maintained over a long period of time.
[0020]
The water treatment apparatus according to the third aspect of the present invention is a combination of the first aspect and the second aspect described above, that is, comprising both biological pretreatment and biological posttreatment. . According to the water treatment apparatus according to this aspect, more efficient water treatment can be performed.
[0021]
A water treatment apparatus according to the present invention will be described with reference to the drawings. FIG. 1 represents a water treatment device according to the invention. Treated water is introduced through the introduction passage 2 to the tank 1. PH in the

tank

1 of this, conditions such as temperature, may be configured to be able to know the sensor means 3 is provided. Treatment water of this

tank

1 is introduced into the pretreatment tank 6 via a valve 5 by the pump 4. A sectional view of the pretreatment tank 6 is shown in FIG. The pretreatment tank 6 is composed of a container 7 and a porous bed 8 filled therein. The porous bed 8 carries the above microorganism group. The water to be treated enters through the conduit 10 and flows through the gap 9 in the porous bed 8. In the meantime, the organic substance etc. which exist in to-be-processed water are adsorb | sucked by the porous bed 8. FIG. And it is decomposed | disassembled by microorganisms and it is made low molecular. Further, depending on the case, the water to be treated can be circulated through the circulation path 28 by switching the

valves

26 and 27. Thereafter, the water to be treated exits the pretreatment tank 6 from the conduit 11. The water to be treated that has undergone the pretreatment is then stored in the storage tank 12 and then subjected to photooxidation treatment.
[0022]
The photo-oxidation process is performed as follows. The oxidant from the oxidant tank 13 is charged into the storage tank 12 using the input device 14 to the water to be treated stored in the storage tank 12. The oxidant and the water to be treated are sufficiently mixed by, for example, stirring the water to be treated in the storage tank 12. The treated water mixed with the oxidizing agent is opened in the valve 15 and reaches the catalyst tank 17 by the pump 16. A catalyst layer is provided in the catalyst tank 17. This catalyst layer may be a catalyst layer used for photo-oxidation treatment, and is preferably made of, for example, a nickel compound, an iron compound, or a titanium compound, and has a packed structure. Moreover, this catalyst layer may be integrated with the photo-oxidation part. The oxidizing agent is activated by the catalyst tank, and then the water to be treated reaches the photooxidation unit 18. This photo-oxidation part 18 is comprised from the container 19 and the ultraviolet lamp 20 accommodated in the inside. When the water to be treated enters the container 19, it is irradiated with ultraviolet rays from the ultraviolet lamp 20. Organic matter, microorganisms, etc. present in the water to be treated are decomposed by ultraviolet rays to be reduced in molecular weight. Thereby, purification, sterilization, etc. of to-be-processed water are achieved. The water to be treated that has exited the photooxidation unit 18 reaches the storage tank 12 again via the valve 21. According to a preferred aspect of the present invention, such photo-oxidation treatment is continuously performed for a predetermined time by circulating the treated water. It is also preferable to carry out while adding an oxidizing agent as appropriate. The degree of purification of the water to be treated can be measured while the sensor 22 is provided and monitored. If the target degree of purification of the water to be treated can be achieved, the water to be treated is then subjected to post-treatment.
[0023]
The water to be treated is guided to the post-treatment tank 24 by closing the valve 21 and opening the valve 23. Here, the post-treatment tank 24 may basically have the same configuration as the pre-treatment tank 6. That is, this post-treatment tank may be configured by accommodating a porous bed carrying the above-described microorganism group in a container. According to a preferred embodiment of the present invention, the porous bed of the post-treatment tank 24 is preferably composed of activated carbon. In the post-treatment tank 24, the water to be treated passes through the gap between the porous beds, and the organic matter remaining in the water to be treated is adsorbed on the porous bed. The adsorbed organic matter is decomposed by the microorganisms supported on the porous bed to reduce the molecular weight. This achieves a more complete purification of the water to be treated.
[0024]
According to a preferred embodiment of the present invention, the porous bed 25 may be formed at the bottom of the storage tank 12. Microorganisms inhabit the porous bed 25. As a result, organic substances are decomposed and molecular weight-reduced while the water to be treated is stored, and water purification by photooxidation can be assisted.
[0025]
In the above apparatus, the size of the pretreatment tank and the posttreatment tank, the output of the ultraviolet lamp of the photooxidation unit, the type and amount of the water to be treated, the flow rate of the water to be treated that passes through the photooxidation unit during the photooxidation treatment, etc. May be determined as appropriate. According to a preferred embodiment of the present invention, in the case of wastewater such as wastewater containing polyoxyethylene (OPE) -based cleaning liquid (COD 300 mg / l), the porous bed in the pretreatment tank is 100 liters, and the porous bed is made of activated carbon in the posttreatment tank. Shitsuyuka a 100 l ^3, 2 kw output of the ultraviolet lamp, when the circulation flow rate of the water to be treated is introduced into the ultraviolet oxidation unit was 1.8 m ³ / hr, a waste water treatment of approximately 125 l / h approximately amounts Can be done.
[0026]
【Example】
Example 1
Water treatment was performed using the same apparatus as that shown in FIG. The output of ultraviolet rays was 2 kW, and 35% hydrogen peroxide water was added as the oxidizing agent in the amount shown in the table below. The pretreatment tank is a porous ceramic carrier having continuous pores obtained by high-temperature sintering the following microorganism group using clay mineral as a main raw material (specific gravity 0.4 to 0.5, water absorption rate 170% or more, pores The one supported at a rate of 75% or more and a surface area of 2 m ² / g) was used.
[0027]
Streptomyces albus (ATCC 3004), Streptoverticillium baldaccii (ATCC 23654), Nocardia asteroides (ATCC 19247), Micromonospora chalcea (ATCC 12452), Rhodococcus rhodochrous (ATCC 13803).
Photosynthetic bacteria: Rhodopseudomonas sphaeroides (IFO 12203), Rhodospirillum rubrum (IFO 3986), Chromatium okenii, Chlorobium limicola.
Lactic acid producing bacteria: Lactobacillus bulgaricus (ATCC 11842), Propionibacterium freudenreichii (IFO 12391), Pediococcus halophilus (IFO 12172), Streptococus lactis (IFO 12007), Storeptococus faecalis (IFO 3971).
Filamentous fungi: Aspergillus japonicus (IFO 4060), Aspergillus oryzae (IFO 4075), Mucor hiemalis (IFO 5303).
Yeast: Saccharomyces cerevisiae (IFO 0304), Saccharomyces lactis (IFO 0433), Candida utilis (IFO 0396).
[0028]
POE-based cleaning liquid-containing wastewater having various COD values was introduced into the above apparatus as raw wastewater, and the raw wastewater was introduced into the pretreatment tank 6 at a flow rate of 30 liters / minute. 30 liters of treated water was stored in the storage tank 12, and then photooxidation was performed. The flow rate for circulating the photooxidation tank was 10 liters / minute, and the treatment time was 1 hour.
The COD value of the raw water and the treated water in the storage tank 12 before and after the photo-oxidation treatment were measured.
Moreover, the process only by a photo-oxidation tank which did not have a pre-processing apparatus was also performed.
The results were as shown in the following table.
[0029]

[0030]
Example 2
The POE cleaning liquid-containing wastewater was treated by the same apparatus as in Example 1, and treated water having a COD value of 12 ppm was obtained by pretreatment and photooxidation treatment. This treated water was introduced at a flow rate of 10 liters / minute into a post-treatment device similar to the pre-treatment device of Example 1 except that the porous ceramic carrier was replaced with granular activated carbon. The COD value of the treated water after this post-treatment was measured, and the time until the value reached 12 ppm was measured.
A post-treatment apparatus similar to that described above was configured except that the microorganisms were not supported, and waste water similar to that described above was introduced thereto at a flow rate of 10 liters / minute. Also in this case, the COD value of the treated water after this post-treatment was measured, and the time until the value reached 12 ppm was measured.
The results were as shown in the following table.
[0031]

[Brief description of the drawings]
FIG. 1 is a schematic view of an entire photooxidized water treatment apparatus according to the present invention.
FIG. 2 is a cross-sectional view of a pretreatment tank or a posttreatment tank of a photooxidized water treatment apparatus according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Storage tank 6 Pretreatment tank 7 Container 8 Porous bed 12 Storage tank 13 Oxidant tank 14 Oxidant charging device 17 Catalyst tank 18 Photooxidation part 20 Ultraviolet lamp 24 Post-treatment tank

Claims

A photo-oxidation part that irradiates the water to be treated with ultraviolet rays,
Microorganisms comprising at least five species in total, wherein the water to be treated before being led to the photooxidation unit is selected from at least one of each of the five groups of actinomycetes, photosynthetic bacteria, lactic acid producing bacteria, filamentous fungi, and yeasts A pretreatment unit to be brought into contact with the group, and water to be treated after being treated with the photooxidation unit, at least one selected from each of the five groups of actinomycetes, photosynthetic bacteria, lactic acid producing bacteria, filamentous fungi, and yeast A photo-oxidized water treatment apparatus comprising a post-treatment unit that is brought into contact with a group of microorganisms consisting of at least five species ,
An oxidant that has been treated by the pretreatment unit, further comprises a storage unit that stores the water to be treated before being led to the photooxidation unit, and adds an oxidant to the water to be treated in the water storage unit A water treatment apparatus comprising an adding means.

The water treatment apparatus according to claim 1, wherein microorganisms in the pretreatment unit and / or the posttreatment unit are supported on a porous carrier.

Microorganisms in the pre-treatment part and the post-treatment part are Streptomyces, Streptoverticillium, Nocardia and Micromonospora belonging to Actinomyces, microorganisms belonging to Rhodococcus, Rhodopseudomonas belonging to photosynthetic bacteria, Rhodospirillum, Chromatium, and microorganisms belonging to the genus Chlorobium, lactic acid Selected from the group consisting of microorganisms belonging to the genus Lactobacillus, Propionibacterium, Pediococcus and Storeptococus belonging to the producer, microorganisms belonging to the genus Aspergillus and Mucor belonging to the filamentous fungus, Saccharomyces belonging to the genus Yeast, and microorganisms belonging to the genus Candida The water treatment apparatus according to claim 1 or 2, wherein

Microbes are Streptomyces albus, Streptoverticillium baldaccii, Nocardia asteroides, Micromonospora chalcea, and Rhodococcus rhodochrous belonging to the actinomycetes, Rhodopseudomonas sphaeroides, Rhodospirillum rubrum, Protobacterium bulrum, Protobacterium , Pediococcus halophilus, Streptococus lactis, and Streptococusfaecalis, those selected Aspergillus japonicus belonging to filamentous fungi, Aspergillus oryzae, and Mucorhiemalis, and Saccharomyces cerevisiae belonging to yeast, from the group consisting of Saccharomyces lactis, and Candida utilis, claim 3 The water treatment apparatus as described.

The water treatment apparatus according to any one of claims 1 to 4, further comprising a porous bed in the storage section.

The water treatment apparatus according to any one of claims 1 to 5, further comprising a catalyst unit for bringing the water to be treated to which the oxidizing agent is added into contact with the catalyst.

A photooxidation part that irradiates the water to be treated with ultraviolet light, and a water to be treated before being guided to the photooxidation part are at least from each of the five groups of actinomycetes, photosynthetic bacteria, lactic acid producing bacteria, filamentous fungi, and yeast. A photo-oxidized water treatment apparatus comprising a pretreatment unit that is selected one by one and brought into contact with a group of at least five types of microorganisms,
Further comprising a storage part for storing the water to be treated before being led to the photooxidation part, provided with an oxidant addition means for adding an oxidant to the water to be treated in the water storage part; and The water treatment apparatus further comprising a porous bed in the storage section.

A photo-oxidation part that irradiates the water to be treated with ultraviolet light, and a water to be treated after being treated with the photo-oxidation part, from each of the five groups of actinomycetes, photosynthetic bacteria, lactic acid-producing bacteria, filamentous fungi, and yeast A photo-oxidized water treatment device comprising a post-treatment unit selected from at least one species and brought into contact with a group of microorganisms comprising at least five species,
Further comprising a storage part for storing the water to be treated before being led to the photooxidation part, provided with an oxidant addition means for adding an oxidant to the water to be treated in the water storage part; and The water treatment apparatus further comprising a porous bed in the storage section.