Isolation of Melamine-Degrading Bacteria from Automotive Paint Waste Water and Fundamental Research on Melamine Degradation Method

SUGIYAMA HIDEHIKO, KAJIYA SHUJI, TSUJI MASAO, KAWANO TAKAYUKI, HAYASHI HISAO, IMAEDA TAKAO

doi:10.2521/jswtb.54.47

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Other Title

自動車塗装廃水からのメラミン分解菌の取得とメラミン分解方法の基礎的研究
ジドウシャトソウハイスイカラノメラミンブンカイキンノシュトクトメラミンブンカイホウホウノキソテキケンキュウ

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Abstract

Melamine derivatives in automotive paint waste water cannot be degraded with activated sludge treatment. For the purpose of degrading residual melamine derivatives, two strains of melamine-degrading bacteria were isolated from automotive paint waste water. One strain isolated at neutral condition was identified as Microbacterium sp., the other strain isolated at acidic condition was identified as Rhodococcus sp. They could degrade melamine but couldn’t degrade melamine derivatives. HPLC analysis indicated many kinds of melamine derivatives after activated sludge treatment of automotive paint waste water. But all of them were converted into melamine with acid treatment. So acidic pre-treatment of melamine derivatives made them bio-degradable. The acid-tolerant melamine-degrading bacterium isolated at acidic condition could degrade melamine at pH5.0, so acid treatment step and melamine degradation step could be carry out simultaneously. Therefore one step treatment of melamine derivatives degradation became possible.

Journal

Japanese Journal of Water Treatment Biology

Japanese Journal of Water Treatment Biology 54 (2), 47-54, 2018

Japanese Society of Water Treatment Biology

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