JP5354679B2 - Coating booth circulating water treatment method - Google Patents
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本発明は、塗装ブース循環水の処理方法に関するものである。 The present invention relates to a method for treating circulating water in a painting booth.
塗料に含まれる有機物成分を分解する微生物を、水性塗料を含む塗装ブース循環水に添加することを特徴とする、塗装ブース循環水の処理方法が、特許文献１に開示されている。
特許文献１の処理方法によれば、塗装ブース循環水中に分散した水性塗料に含まれる有機物成分が、炭酸ガスと水とに分解されるので、処理後の残留物である無機物のスラッジを塗装ブース循環水の循環系外に排出する一方、塗装ブース循環水は、ＢＯＤ及びＣＯＤを一定の許容範囲内に維持しつつ、更新することなく使い続けることができる。
Patent Document 1 discloses a treatment method for circulating paint booth water, characterized in that microorganisms that decompose organic components contained in the paint are added to the paint booth circulating water containing an aqueous paint.
According to the treatment method of Patent Document 1, since organic components contained in the water-based paint dispersed in the painting booth circulating water are decomposed into carbon dioxide gas and water, the inorganic sludge, which is a residue after the treatment, is removed from the painting booth. While the circulating water is discharged out of the circulating system, the painting booth circulating water can be used without being updated while maintaining the BOD and COD within a certain allowable range.
溶剤系塗料を含む塗装ブース循環水の処理に際しては、非水溶性で粘着性の高い溶剤系塗料を不粘着化して水中に分散させる必要がある。従って、水中に容易に分散する水性塗料を対象とする特許文献１の処理方法を、非水溶性の溶剤系塗料を含む塗装ブース循環水の処理に適用する際には、塗装ブース循環水に凝集剤（不粘着化剤）を別途添加する必要性を生ずる。
本発明は上記問題に鑑みてなされたものであり、水性塗料を含む塗装ブース循環水のみならず溶剤系塗料を含む塗装ブース循環水をも処理できる、微生物を利用した塗装ブース循環水の処理方法であって、溶剤系塗料を含む塗装ブース循環水を処理する際に、塗装ブース循環水に凝集剤（不粘着化剤）を別途添加する必要性を生じない、塗装ブース循環水の処理方法を提供することを目的とする。
When treating circulating water in a paint booth containing a solvent-based paint, it is necessary to make the water-insoluble and highly adhesive solvent-based paint non-tacky and disperse it in water. Therefore, when applying the treatment method of Patent Document 1 for water-based paints that easily disperse in water to the treatment of painting booth circulating water containing a water-insoluble solvent-based paint, the coating booth circulating water aggregates. This necessitates the addition of a separate agent (tackifying agent).
The present invention has been made in view of the above problems, and is capable of treating not only paint booth circulating water containing water-based paint but also paint booth circulating water containing solvent-based paint, and a treatment method for paint booth circulating water using microorganisms. However, when processing paint booth circulating water containing solvent-based paint, there is no need to add a flocculant (adhesive agent) to the paint booth circulating water. The purpose is to provide.
上記課題を解決するために、本発明においては、塗料に含まれる有機物成分を分解する微生物であって、バイオサーファクタンントを生成する微生物を、塗装ブース循環水に添加することを特徴とする塗装ブース循環水の処理方法を提供する。
塗料に含まれる有機物成分を分解する微生物であって、バイオサーファクタンント（生物由来の界面活性剤）を生成する微生物を、塗装ブース循環水に添加すれば、塗装ブース循環水に含まれる塗料が水性塗料の場合には、本来的な性質に基づいて水中に分散した塗料に含まれる有機物成分を微生物が分解し、塗料が非水溶性の溶剤系塗料の場合には、バイオサーファクタンントの働きで水中に分散すると共に非粘着化した塗料に含まれる有機物成分を微生物が分解する。従って、本発明に係る塗装ブース循環水の処理方法によれば、水性塗料を含む塗装ブース循環水のみならず溶剤系塗料を含む塗装ブース循環水をも、微生物を利用して処理するとことができ、且つ溶剤系塗料を含む塗装ブース循環水を処理する際に、塗装ブース循環水に凝集剤（非粘着化剤）を別途添加する必要性を生じない。
分解後の残留物は、微生物の凝集作用によりフロックを形成し、水から分離されて循環槽の底部に沈殿する。この結果、スラッジの回収率が高まる。
In order to solve the above-mentioned problem, in the present invention, a microorganism that decomposes an organic component contained in a coating material and that generates a biosurfactant is added to the coating booth circulating water. A booth circulating water treatment method is provided.
If microorganisms that decompose organic components contained in paint and produce biosurfactants (biological surfactants) are added to the paint booth circulating water, the paint contained in the paint booth circulating water In the case of water-based paints, microorganisms decompose organic components contained in the paint dispersed in water based on its inherent properties. When the paint is a water-insoluble solvent-based paint, the biosurfactant functions. The microorganisms decompose organic components contained in the paint that is dispersed in water and becomes non-tacky. Therefore, according to the treatment method for circulating water in the paint booth according to the present invention, not only paint booth circulating water containing water-based paint but also paint booth circulating water containing solvent-based paint can be treated using microorganisms. In addition, when processing the coating booth circulating water containing the solvent-based paint, there is no need to separately add a flocculant (non-adhesive agent) to the coating booth circulating water.
The residue after decomposition forms flocs due to the aggregating action of microorganisms, is separated from water, and settles at the bottom of the circulation tank. As a result, the sludge recovery rate is increased.
本発明においては、前記微生物は、Bacillus
thuringiensis（バチルス・チューリゲンシス）及び／又はPseudomonas
fluorescens（シュードモナス・フルオレッセンス）である。
Bacillus thuringiensis（バチルス・チューリゲンシス）はベンゼン、トルエン、ナフタレン等の芳香族炭化水素化合物の分解能力とバイオサーファクタント生成能力とを有しており、Pseudomonas fluorescens（シュードモナス・フルオレッセンス）はノニオン系界面活性剤（非イオン系界面活性剤）、カチオン系界面活性剤（陽イオン系界面活性剤）、ベンゼンの分解能力とバイオサーファクタント生成能力とを有している。
In the present invention, the microorganism is Bacillus.
thuringiensis and / or Pseudomonas
fluorescens (Pseudomonas fluorescens).
Bacillus thuringiensis has the ability to decompose aromatic hydrocarbon compounds such as benzene, toluene, and naphthalene and to generate biosurfactants. Pseudomonas fluorescens is a nonionic surfactant. Agent (nonionic surfactant), cationic surfactant (cationic surfactant), benzene decomposition ability and biosurfactant generation ability.
本発明においては、上記微生物に加えて、Bacillus megaterium（バチルス・メガテリウム）、Bacillus amyloliquefaciens（バチルス・アミロリクエファシエンス）、Bacillus licheniformis（バチルス・リケニフォルミス）、Pseudomonas putida（シュードモナス・プチダ）から成るグループに属する1種又は複数種の微生物を塗装ブース循環水に添加する。
Bacillus megaterium（バチルス・メガテリウム）はヘキサン、ヘプタン等の脂肪族炭化水素化合物、鉱物油系消泡剤の分解能力を有しており、Bacillus amyloliquefaciens（バチルス・アミロリクエファシエンス）はアニオン系界面活性剤（陰イオン系界面活性剤）の分解能力を有しており、Bacillus licheniformis（バチルス・リケニフォルミス）は揮発性有機化合物、デカン、ヘキサデカン等の脂肪族炭化水素化合物、水性溶媒であるブチルセロソルブ、鉱物油系消泡剤の分解能力を有しており、Pseudomonas putida（シュードモナス・プチダ）はベンゼン、トルエン、エチルベンゼン、キシレン、アセトン、フェノール、水性溶媒であるイソプロピルアルコールの分解能力を有している。
Bacillus thuringiensis（バチルス・チューリゲンシス）及び／又はPseudomonas fluorescens（シュードモナス・フルオレッセンス）に加えて、Bacillus megaterium（バチルス・メガテリウム）、Bacillus amyloliquefaciens（バチルス・アミロリクエファシエンス）、Bacillus licheniformis（バチルス・リケニフォルミス）、Pseudomonas putida（シュードモナス・プチダ）から成るグループに属する1種又は複数種の微生物を塗装ブース循環水に添加することにより、溶剤が異なる種々の塗料を処理することが可能となる。
水性塗料には、一般的に、水への分散性を高めるために、界面活性剤が含まれている。Bacillus amyloliquefaciens（バチルス・アミロリクエファシエンス）、Pseudomonas fluorescens（シュードモナス・フルオレッセンス）は界面活性剤の分解能力を有するので、これらを塗装ブース循環水に添加することにより、界面活性剤による発泡を抑制することができる。
水性塗料を含む塗装ブース循環水には、界面活性剤が生成する泡を消すために、一般的に消泡剤が添加される。消泡剤は塗装ブース循環水の水質を悪化させる。Bacillus megaterium（バチルス・メガテリウム）、Bacillus licheniformis（バチルス・リケニフォルミス）は消泡剤を分解する能力を有しているので、これらを塗装ブース循環水に添加することにより、消泡剤の添加に起因する塗装ブース循環水の水質悪化を防止することができる。
In the present invention, in addition to the above-mentioned microorganism, it belongs to the group consisting of Bacillus megaterium, Bacillus amyloliquefaciens, Bacillus licheniformis, Pseudomonas putida (Pseudomonas putida). Add one or more microorganisms to the paint booth circulating water.
Bacillus megaterium has the ability to decompose aliphatic hydrocarbon compounds such as hexane and heptane, and mineral oil-based defoamers, and Bacillus amyloliquefaciens is an anionic surfactant. It has the ability to decompose (anionic surfactant), and Bacillus licheniformis is a volatile organic compound, aliphatic hydrocarbon compounds such as decane and hexadecane, butyl cellosolve, which is an aqueous solvent, and mineral oils Pseudomonas putida has the ability to decompose benzene, toluene, ethylbenzene, xylene, acetone, phenol, and isopropyl alcohol, which is an aqueous solvent.
In addition to Bacillus thuringiensis and / or Pseudomonas fluorescens, Bacillus megaterium, Bacillus amyloliquefaciens, Bacillus licheniformis, Bacillus licheniformis By adding one or more microorganisms belonging to the group consisting of Pseudomonas putida (Pseudomonas putida) to the paint booth circulating water, it becomes possible to treat various paints with different solvents.
In general, the water-based paint contains a surfactant in order to enhance the dispersibility in water. Bacillus amyloliquefaciens and Pseudomonas fluorescens have the ability to decompose surfactants, so adding these to the paint booth circulating water suppresses foaming by surfactants. be able to.
An antifoaming agent is generally added to the coating booth circulating water containing the water-based paint in order to eliminate the foam generated by the surfactant. Antifoaming agent deteriorates the quality of the circulating water in the painting booth. Since Bacillus megaterium and Bacillus licheniformis have the ability to decompose antifoaming agents, adding them to the paint booth circulating water results in the addition of antifoaming agents It is possible to prevent deterioration of water quality in the painting booth circulating water.
本発明の好ましい態様においては、グルコース水溶液に窒素とリンとを添加した液体培地で微生物を培養し、増殖した微生物を脱水乾燥させた粉体を、塗装ブース循環水に添加する。
本発明の好ましい態様においては、グルコース水溶液に窒素とリンとを添加した液体培地で微生物を培養し、微生物を増殖させた培養液を塗装ブース循環水に添加する。
本発明の好ましい態様においては、小麦糠及び／又はトウモロコシ蒸留粕を含む粉体培地で微生物を培養し、増殖した微生物を粉体培地と共に乾燥させた粉体を、塗装ブース循環水に添加する。
微生物は、グルコース水溶液に窒素とリンとを添加した液体培地で培養しても良く、小麦糠及び／又はトウモロコシ蒸留粕を含む粉体培地で培養しても良い。
In a preferred embodiment of the present invention, microorganisms are cultured in a liquid medium in which nitrogen and phosphorus are added to an aqueous glucose solution, and powder obtained by dehydrating and drying the grown microorganisms is added to the coating booth circulating water.
In a preferred embodiment of the present invention, microorganisms are cultured in a liquid medium in which nitrogen and phosphorus are added to an aqueous glucose solution, and the culture solution in which the microorganisms are grown is added to the painting booth circulating water.
In a preferred embodiment of the present invention, microorganisms are cultured in a powder medium containing wheat straw and / or corn distillers, and powder obtained by drying the grown microorganisms together with the powder medium is added to the coating booth circulating water.
The microorganism may be cultured in a liquid medium in which nitrogen and phosphorus are added to an aqueous glucose solution, or may be cultured in a powder medium containing wheat straw and / or corn distillers.
本発明の実施例に係る塗装ブース循環水の処理方法を説明する。
図１に示すように、塗装ブース循環水処理装置は、塗装ブースの底部を形成する循環槽１と、循環槽１内の塗装ブース循環水を循環させつつ曝気するポンプ２及び曝気ノズル３と、循環槽１内の塗装ブース循環水を循環させつつ塗料スラッジを脱水除去するポンプ４及び遠心分離機５と、曝気ノズル３へ差し向けられた塗装ブース循環水の一部を塗装ブース内で散水する散水ノズル６と、遠心分離機５へ差し向けられた塗装ブース循環水の一部を塗装ブース内で散水する散水ノズル７とを備えている。
Bacillus
thuringiensis（バチルス・チューリゲンシス）及び／又はPseudomonas fluorescens（シュードモナス・フルオレッセンス）を、グルコース水溶液に窒素とリンとを添加した液体培地で培養し、増殖した微生物を脱水乾燥させた粉体、或いは前記微生物をグルコース水溶液に窒素とリンとを添加した液体培地で培養し、微生物を増殖させた培養液、或いは小麦糠及び／又はトウモロコシ蒸留粕を含む粉体培地で前記微生物を培養し、増殖した微生物を粉体培地と共に乾燥させた粉体と、微生物活性化剤である窒素とリンとが、循環槽１内の塗装ブース循環水に添加され、塗装ブース循環水中で微生物が増殖している。
複数種の微生物を塗装ブース循環水に添加する場合、微生物の培養は種毎に、当該種に最適の環境下で行う。
塗装ブース循環水が曝気されることにより、好気性の前記微生物の増殖が促進される。微生物はバイオサーファクタントを生成する。
A method for treating circulating water in a coating booth according to an embodiment of the present invention will be described.
As shown in FIG. 1, the painting booth circulating water treatment apparatus includes a circulation tank 1 that forms the bottom of the painting booth, a
Bacillus
thuringiensis and / or Pseudomonas fluorescens in a liquid medium in which nitrogen and phosphorus are added to an aqueous glucose solution, Microorganisms are cultured in a liquid medium in which nitrogen and phosphorus are added to an aqueous glucose solution and the microorganisms are grown, or the microorganisms are grown in a powder medium containing wheat straw and / or corn distillers. The powder obtained by drying together with the powder medium and nitrogen and phosphorus, which are microorganism activators, are added to the painting booth circulating water in the circulation tank 1, and microorganisms are growing in the painting booth circulating water.
When a plurality of types of microorganisms are added to the circulating water in the painting booth, the microorganisms are cultured for each species in an environment optimal for the species.
By aeration of the paint booth circulating water, the growth of the aerobic microorganisms is promoted. Microorganisms produce biosurfactants.
塗装ブース内でオーバースプレーされた余剰塗料は散水ノズル６、７からの散水によって循環槽１内の塗装ブース循環水へ連行される。
塗料が水性塗料の場合には、水溶性という本来的性質によって塗料は塗装ブース循環水中に分散する。塗料が非水溶性の溶剤系塗料の場合には、微生物が生成したバイオサーファクタンントの働きで塗料は塗装ブース循環水中に分散し且つ非粘着化する。
塗装ブース循環水中に分散した塗料に含まれる樹脂、溶剤等の有機物成分は、塗装ブース循環水中に存在する前記微生物によって、水と炭酸ガスとに分解される。
分解後残留物である無機物は、微生物の凝集作用によりフロックを形成し、循環槽１の底部に沈殿する。
スラッジを含む塗装ブース循環水が遠心分離機５へ送られ、スラッジが脱水されて除去され、塗装ブース循環水は循環槽１に還流する。
前述の如く、分解後残留物である無機物は、微生物の凝集作用によりフロックを形成するので、スラッジの回収率が高まる。
有機物が分解され、スラッジが除去された塗装ブース循環水は、ＢＯＤ及びＣＯＤを一定の許容範囲内に維持しつつ、更新することなく使い続けることができる。
本実施例に係る塗装ブース循環水の処理方法によれば、水性塗料を含む塗装ブース循環水のみならず溶剤系塗料を含む塗装ブース循環水をも、微生物を利用して処理するとことができ、且つ溶剤系塗料を含む塗装ブース循環水を処理する際に、塗装ブース循環水に凝集剤（非粘着化剤）を別途添加する必要性を生じない。
微生物の凝集作用は塗料負荷の増減や種類の変化に対応し易いという利点を有する。
上記微生物に加えて、Bacillus
megaterium（バチルス・メガテリウム）、Bacillus amyloliquefaciens（バチルス・アミロリクエファシエンス）、Bacillus licheniformis（バチルス・リケニフォルミス）、Pseudomonas putida（シュードモナス・プチダ）から成るグループに属する1種又は複数種の微生物を塗装ブース循環水に添加しても良い。溶剤が異なる種々の塗料を処理することが可能となる。
Bacillus
amyloliquefaciens（バチルス・アミロリクエファシエンス）、Pseudomonas fluorescens（シュードモナス・フルオレッセンス）を塗装ブース循環水に添加することにより、水性塗料に含まれる界面活性剤による発泡を抑制することができる。
Bacillus megaterium（バチルス・メガテリウム）、Bacillus licheniformis（バチルス・リケニフォルミス）を塗装ブース循環水に添加することにより、界面活性剤が生成する泡を消すために塗装ブース循環水に添加された消泡剤に起因する塗装ブース循環水の水質悪化を防止することができる。
The excess paint oversprayed in the painting booth is taken to the painting booth circulating water in the circulation tank 1 by watering from the watering
When the paint is a water-based paint, the paint disperses in the paint booth circulating water due to the inherent property of being water-soluble. When the paint is a water-insoluble solvent-based paint, the paint is dispersed in the coating booth circulating water and becomes non-tacky by the action of a biosurfactant generated by microorganisms.
Organic substances such as resins and solvents contained in the paint dispersed in the painting booth circulating water are decomposed into water and carbon dioxide by the microorganisms present in the painting booth circulating water.
The inorganic substance, which is a residue after decomposition, forms flocs due to the aggregating action of microorganisms and precipitates at the bottom of the circulation tank 1.
The coating booth circulating water containing the sludge is sent to the
As described above, the inorganic substance that is a residue after decomposition forms flocs by the aggregating action of microorganisms, so that the sludge recovery rate is increased.
The paint booth circulating water from which organic matter has been decomposed and sludge has been removed can be used without being renewed while maintaining BOD and COD within a certain allowable range.
According to the treatment method of the paint booth circulating water according to the present embodiment, not only the paint booth circulating water containing the water-based paint but also the paint booth circulating water containing the solvent-based paint can be treated using microorganisms, Moreover, when processing the coating booth circulating water containing the solvent-based paint, there is no need to separately add a flocculant (non-adhesive agent) to the coating booth circulating water.
The aggregating action of microorganisms has an advantage that it can easily cope with increase / decrease in paint load and change in type.
In addition to the above microorganisms, Bacillus
One or more microorganisms belonging to the group consisting of megaterium, Bacillus amyloliquefaciens, Bacillus licheniformis, Pseudomonas putida, Pseudomonas putida You may add to. It is possible to treat various paints with different solvents.
Bacillus
By adding amyloliquefaciens and Pseudomonas fluorescens to the paint booth circulating water, foaming by the surfactant contained in the aqueous paint can be suppressed.
Due to the addition of Bacillus megaterium and Bacillus licheniformis to the paint booth circulating water, the antifoam added to the paint booth circulating water to eliminate the foam generated by the surfactant It is possible to prevent deterioration of the water quality of the circulating water in the painting booth.
図１の処理装置と同様の構成を有する模型実験装置を用い、一日当たりの塗料オーバースプレー量、塗装ブース循環水量を実働装置の１／２０２に設定して、上記実施例に係る塗装ブース循環水処理を実施し、塗装ブース循環水のＣＯＤ濃度の経時変化を調べた。
実験条件は以下の通りである。
(1)一日当たりの塗装ブース循環水量
０．７５ｔｏｎ
(2)一日当たりのオーバースプレー量
下塗り塗料（水性） ：１．２８ｋｇ
上塗り塗料（水性） ：１．２３ｋｇ
艶出し塗料（溶剤系）：１．０５ｋｇ
(3)使用微生物
実施例で挙げた全ての微生物を塗装ブース循環水に添加した。
(4)実験期間
実働２０日
(5)一日の作業スケジュール
検水(8:30AM)→スラッジの遠心濾過(9:00〜11:00AM、但し第１日〜第５日の間は実施していない)→検水(11:30AM)→スプレー(1:00〜2:00PM)→検水(3:00PM)
(6)塗装ブース循環水は、実験終了まで更新することなく使い続けた。
塗装ブース循環水のＣＯＤの経時変化を図２に示す。参考の為に、微生物を添加しない水に塗料が分散した場合のＣＯＤの経時変化も図２に示している。
図２中、丸印で示した数値は実験の日付を示し、文言「ブランク」は１１：３０ＡＭの検水を意味し、文言「１Ｈ後」は３：００ＰＭの検水を示し、文言「翌日」は翌日の８：３０ＡＭの検水を示す。文言「３日後」、「４日後」は、間に２日、3日の休日があったことを示している。
図２から、上記実施例に係る塗装ブース循環水処理を実施した結果、ＣＯＤの増加が抑制されていることが分かる。
本実験でのスラッジ回収率は約９２％であった。微生物の凝集作用によるフロック形成が、スラッジ回収率を高めたことが分かる。
Using the model experimental apparatus having the same configuration as the processing apparatus of FIG. 1, the coating overspray amount per day and the coating booth circulating water amount are set to 1/202 of the actual working device, and the coating booth circulating water according to the above embodiment is used. The treatment was carried out and the change over time in the COD concentration of the paint booth circulating water was examined.
The experimental conditions are as follows.
(1) Paint booth circulating water volume per day 0.75ton
(2) Overspray amount per day Undercoat paint (water-based): 1.28 kg
Top coat (water-based): 1.23 kg
Polishing paint (solvent type): 1.05kg
(3) Microorganisms used All the microorganisms mentioned in the examples were added to the paint booth circulating water.
(4) Experiment period 20 days actual work
(5) Daily work schedule Sample sampling (8:30 AM) → Sludge centrifugal filtration (9: 00 ~ 11: 00AM, but not implemented from 1st to 5th day) → Sample (11 : 30AM) → spray (1: 00-2: 00PM) → test water (3:00 PM)
(6) The painting booth circulating water continued to be used without being updated until the end of the experiment.
FIG. 2 shows the change over time in the COD of the painting booth circulating water. For reference, FIG. 2 also shows changes in COD over time when the paint is dispersed in water to which no microorganisms are added.
In FIG. 2, the numerical value indicated by a circle indicates the date of the experiment, the word “blank” means 11:30 AM water sample, the word “after 1 H” means 3:00 PM water sample, and the word “next day” "Shows 8:30 AM water sample the next day." The words “after 3 days” and “after 4 days” indicate that there were two or three days off in between.
From FIG. 2, it can be seen that the increase in COD is suppressed as a result of performing the coating booth circulating water treatment according to the above example.
The sludge recovery rate in this experiment was about 92%. It can be seen that floc formation due to the aggregating action of microorganisms increased the sludge recovery rate.
図１の処理装置と同様の構成を有する模型実験装置を用い、水性塗料を含む塗装ブース循環水処理を実施し、塗装ブース循環水の界面活性剤濃度の経時変化を調べた。
実験条件は以下の通りである。
(1)一日当たりの塗装ブース循環水量
０．７５ｔｏｎ
(2)一日当たりのオーバースプレー量
水性塗料 ：２．５ｋｇ
(3)使用微生物
実施例で挙げた全ての微生物を塗装ブース循環水に添加した。
(4)実験期間
実働１０日
(4)一日の作業スケジュール
検水(8:30AM)→スラッジの遠心濾過(9:00〜11:00AM、但し第１日目は実施していない)→検水(11:30AM)→スプレー(1:00〜2:00PM)→検水(3:00PM)
(5)塗装ブース循環水は、実験終了まで更新することなく使い続けた。
塗装ブース循環水の界面活性剤濃度の経時変化を図３に示す。参考の為に、微生物を添加しない水に塗料が分散した場合の界面活性剤濃度の経時変化も図３に示している。
図３中、丸印で示した数値は実験の日付を示し、文言「ブランク」は１１：３０ＡＭの検水を意味し、文言「スプレー後」は３：００ＰＭの検水を示し、文言「翌日」は翌日の８：３０ＡＭの検水を示す。文言「３日後」、「４日後」は、間に２日、3日の休日があったことを示している。
図３から、上記実施例に係る塗装ブース循環水処理を実施した結果、界面活性剤濃度の増加が抑制されていることが分かる。
Using a model experimental apparatus having the same configuration as the treatment apparatus of FIG. 1, a coating booth circulating water treatment including a water-based paint was performed, and a change with time in the surfactant concentration of the coating booth circulating water was examined.
The experimental conditions are as follows.
(1) Paint booth circulating water volume per day 0.75ton
(2) Amount of overspray water paint per day: 2.5kg
(3) Microorganisms used All the microorganisms mentioned in the examples were added to the paint booth circulating water.
(4) Experimental period 10 days
(4) Daily work schedule Sample water (8:30 AM) → Sludge centrifugal filtration (9: 00-11: 00AM, but not on the first day) → Sample water (11:30 AM) → Spray (1: 00〜2: 00PM) → Check water (3:00 PM)
(5) The painting booth circulating water continued to be used without being updated until the end of the experiment.
FIG. 3 shows the change over time in the surfactant concentration of the paint booth circulating water. For reference, FIG. 3 also shows the change over time in the surfactant concentration when the paint is dispersed in water to which no microorganisms are added.
In FIG. 3, the numerical value indicated by a circle indicates the date of the experiment, the word “blank” means 11:30 AM water sample, the word “after spray” means 3:00 PM water sample, and the word “next day” "Shows 8:30 AM water sample the next day." The words “after 3 days” and “after 4 days” indicate that there were two or three days off in between.
From FIG. 3, it can be seen that the increase in the surfactant concentration is suppressed as a result of performing the coating booth circulating water treatment according to the above example.
図４に示すように、多孔質の多数の担体８を収容した処理槽９と、循環槽１と処理槽９との間で塗装ブース循環水を循環させるポンプ１０とを、図１の塗装ブース循環水処理装置に追加しても良い。担体８が処理槽９内で攪拌されることにより、好気性微生物の増殖が促進される。
図４の担体８と処理槽９とポンプ１０とに代えて、図５に示すように、微生物を担持する繊維を収容した処理槽９’を循環槽１内に配設しても良い。
As shown in FIG. 4, a
Instead of the carrier 8, the
本発明により、水性塗料を含む塗装ブース循環水のみならず溶剤系塗料を含む塗装ブース循環水をも処理できる、微生物を利用した塗装ブース循環水の処理方法であって、溶剤系塗料を含む塗装ブース循環水を処理する際に、塗装ブース循環水に凝集剤（不粘着化剤）を別途添加する必要性を生じない、塗装ブース循環水の処理方法が提供される。 According to the present invention, a coating booth circulating water treatment method using microorganisms capable of treating not only paint booth circulating water containing water-based paint but also paint booth circulating water containing solvent-based paint, which comprises solvent-based paint Provided is a coating booth circulating water treatment method that does not require the addition of a flocculant (non-adhesive agent) to the painting booth circulating water when treating the booth circulating water.
１ 循環槽
２、４、１０ ポンプ
３ 曝気ノズル
５ 遠心分離機
６、７ 散水ノズル
８ 担体
９、９’ 処理槽
DESCRIPTION OF SYMBOLS 1
Claims (4)
fluorescens（シュードモナス・フルオレッセンス）と、Bacillus megaterium（バチルス・メガテリウム）、Bacillus amyloliquefaciens（バチルス・アミロリクエファシエンス）、Bacillus licheniformis （バチルス・リケニフォルミス）、Pseudomonas
putida （シュードモナス・プチダ）から成るグループに属する1種又は複数種とであることを特徴とする塗装ブース循環水の処理方法。 A method for treating paint booth circulating water, which is a microorganism that decomposes organic components contained in a paint and that adds a microorganism that generates a biosurfactant to the paint booth circulating water, wherein the microorganism is Bacillus thuringiensis and / or Pseudomonas
fluorescens (Bacillus megaterium), Bacillus amyloliquefaciens, Bacillus licheniformis, Pseudomonas
A method for treating circulating water in a paint booth, characterized by being one or more members belonging to the group consisting of putida (Pseudomonas putida).
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| CN103204589A (en) * | 2013-03-06 | 2013-07-17 | 付永全 | Method for biologically treating industrial circulating water and stabilizing quality thereof |
| KR101601589B1 (en) | 2015-01-09 | 2016-03-08 | 현대자동차주식회사 | An agent containing microorganism to remove malodor from a painting booth, and a method of removing malodor using thereof |
| JP2017163900A (en) * | 2016-03-16 | 2017-09-21 | ジェックス株式会社 | Liquid bacterium |
| JP7206650B2 (en) * | 2018-07-02 | 2023-01-18 | 栗田工業株式会社 | Wet paint booth circulating water treatment method |
| CN114044606A (en) * | 2021-11-01 | 2022-02-15 | 长春一汽综合利用股份有限公司 | Method for treating and comprehensively utilizing water-based paint cleaning waste liquid |
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| JPH07102298A (en) * | 1993-10-01 | 1995-04-18 | Kaiyo Bio Technol Kenkyusho:Kk | Cleaning of oil-polluted object with microbe |
| JP3256047B2 (en) * | 1993-10-06 | 2002-02-12 | 独立行政法人産業技術総合研究所 | Wastewater treatment method and new microorganism |
| JP3140004B2 (en) * | 1999-03-31 | 2001-03-05 | 三村 光男 | Garbage processing equipment |
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