School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China.
Bioresour Technol. 2011 Nov;102(22):10772-5. doi: 10.1016/j.biortech.2011.09.030. Epub 2011 Sep 16.
Biodegradation behavior and kinetics of ethylthionocarbamate under nitrate, sulfate and ferric reducing conditions by mixed cultures enriched from the anaerobic digester sludge was investigated. The results showed that ethylthionocarbamate could be degraded independently by the mixed cultures coupled to nitrate, sulfate, and ferric reduction, and meanwhile, nitrite, sulfide, and ferrous were accumulated as a result of nitrate, sulfate and ferric reduction, respectively. Ferric was a more favorable terminal electron acceptor compared to nitrate and sulfate. The order of the electron acceptors with decreasing biodegradation rates of the ethylthionocarbamate was: ferric>nitrate>sulfate, and the corresponding maximum biodegradation rate was 7.240, 6.267, and 4.602 mg/(L·d), respectively. The anaerobic biodegradation of ethylthionocarbamate under various electron acceptor conditions can be accurately described by first order exponential decay kinetics.
从厌氧消化污泥中富集的混合培养物对乙基硫代氨基甲酸酯在硝酸盐、硫酸盐和铁还原条件下的生物降解行为和动力学进行了研究。结果表明，乙基硫代氨基甲酸酯可以在混合培养物的作用下独立于硝酸盐、硫酸盐和铁还原而被降解，同时，由于硝酸盐、硫酸盐和铁还原，亚硝酸盐、硫化物和亚铁分别被积累。铁是比硝酸盐和硫酸盐更有利的末端电子受体。乙基硫代氨基甲酸酯生物降解率降低的电子受体顺序为：铁>硝酸盐>硫酸盐，相应的最大生物降解率分别为 7.240、6.267 和 4.602 mg/（L·d）。在各种电子受体条件下，乙基硫代氨基甲酸酯的厌氧生物降解可以通过一阶指数衰减动力学准确描述。
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