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KMID : 1024520140230010129
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Journal of the Environmental Sciences
2014 Volume.23 No. 1 p.129 ~ p.142
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Isolation and Charaterization of Dye-Degrading Microorganisms for Treatment of Chromaticity Contained in Industrial Dyeing Wastewater
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Kim Jung Tae
Park Geun-Tae
Lee Geon
Kang Kyeong Hwan
Kim Joong-Kyun
Lee Sang-Joon
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Abstract
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To treat chromaticity contained in effluents of dyeing wastewater efficiently, potent dye-degrading microorganisms were isolated from influent water, aeration- tank sludge, recycle water and settling-tank sludge located in leather and dyeing treatment plant. Six potent strains were finally isolated and identified as Comamonas testosteroni, Methylobacteriaceae bacterium, Stenotrophomonas sp., Kluyveromyces fragilis, Ascomycetes sp. and Basidiomycetes sp. When Basidiomycetes sp. was inoculated into ME medium containing basal mixed-dyes, 93% of color was removed after 8 days incubation. In the same experiment, the 1:1 mixed culture of Basidiomycetes sp. and photosynthetic bacterium exhibited 88% of color removal; however, it showed better color removal for single-color dyes. The aeration-tank and settling-tank samples revealed higher color removal (95-96%) for black dyes. The settling-tank sample also revealed higher color removal on basal mixed-dyes, which resulted in 90% color removal after 6-h incubation. From the above results, it is expected to achieve a higher color removal using the mixed microorganisms that were isolated from aeration-tank and settling-tank samples.
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KEYWORD
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Dyeing wastewater, Biodegradation, Dye-degrading microorganisms, Chromaticity removal
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