Thiocyanate degradation by Acremonium strictum and inhibition by secondary toxicants |
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Authors: | Hyouk K Kwon Seung H Woo Jong M Park |
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Institution: | (1) Department of Chemical Engineering, School of Environmental Science & Engineering, Pohang University of Science and Technology, San 31, Pohang, Kyungbuk, 790-784, Korea |
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Abstract: | Acremonium strictum, capable of degrading 7.4 g thiocyanate l–1, was isolated from wastewater condensate from coke-oven gas. Ammonia and sulfate were the final products from thiocyanate degradation with a stoichiometric ratio of near 1:1. The highest degradation activity was at pH 6. Although the degradation rate started to be inhibited above 4 g thiocyanate l–1, thiocyanate was completely degraded up to 7.4 g l–1 within 85 h in shake-flask cultures. The degradation of thiocyanate was inhibited by phenol above 625 mg l–1, by cyanide above 16 mg l–1, and by nitrite above 100 mg l–1. However, ammonia and nitrate had negligible inhibition on thiocyanate degradation up to 3 g l–1 and 1.5 g l–1, respectively. |
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Keywords: | biodegradation fungus inhibition thiocyanate wastewater |
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