Inhibitory effect of chlorinated guaiacols on methanogenic activity of anaerobic digester sludge |
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Authors: | Cheng-Ri Yin Dong-Il Seo Seung-Hun Baek Ken Ohlen Sung-Taik Lee |
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Institution: | (1) Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 373-1 Kusong-dong, Yusong-ku, Taejon, 305-701, Korea;(2) Department of Environmental Engineering, Chungnam National University, 220 Gung-dong, Yusong-ku, Taejon, 305-764, Korea |
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Abstract: | Of four chlorinated guaiacols, tetrachloroguaiacol at 62 M inhibited acetate methanogenesis, the strongest decreasing activity by 50%. 4,5,6-Trichloroguaiacol, 4,5-dichloroguaiacol, and 4-chloroguaiacol showed 50% inhibition at 0.13, 0.32, and 1.50 mM, respectively. Degradation test results of volatile fatty acids (acetic, propionic, and butyric acid) by anaerobic digester sludge (stored 5 weeks) indicated that syntrophic butyrate degraders of this sludge were more sensitive to tetrachloroguaiacol than acetoclastic methanogens and syntrophic propionate degraders. |
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Keywords: | anaerobic sludge bleached pulp effluent chlorinated guaiacols inhibition methanogenesis |
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