Successful bioaugmentation of an activated sludge reactor with Rhodococcus sp YYL for efficient tetrahydrofuran degradation

文献类型： 外文期刊

第一作者： Yao, Yanlai

作者： Yao, Yanlai;Zhu, Fengxiang;Min, Hang;Yao, Yanlai;Lu, Zhenmei;Bian, Caimiao

作者机构：

关键词： Tetrahydrofuran;Bioaugmentation;Mixed culture;Rhodococcus sp YYL

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：10.588； 五年影响因子：10.129 ）

ISSN： 0304-3894

年卷期： 2013 年 261 卷

页码：

收录情况： SCI

摘要： The exchange of tetrahydrofuran (THF)-containing wastewater should significantly affect the performance of an activated sludge system. In this study, the feasibility of using THF-degrading Rhodococcus sp. strain YYL to bioaugment an activated sludge system treating THF wastewater was explored. As indicated by a DGGE analysis, strain YYL alone could not dominate the system, with the concentration of mixed liquor suspended solids (MLSS) decreasing to nearly half of the initial concentration after 45 d, and the microbial diversity was found to be significantly reduced. However, after the reactor was augmented with the mixed culture of strain YYL and two bacilli initially coexisting in the enriched isolation source, strain YYL quickly became dominant in the system and was incorporated into the activated sludge. The concentration of MLSS increased from 2.1 g/L to 7.3 g/L in 20 d, and the efficiency of THF removal from the system was remarkably improved. After the successful bioaugmentation, more than 95% of THF was completely removed from the wastewater when 20 mM THF was continuously loaded into the system. In conclusion, our research first demonstrates that bioaugmentation of activated sludge system for THF degradation is feasible but that successful bioaugmentation should utilize a THF-degrading mixed culture as the inoculum, in which the two bacilli might help strain YYL colonize in activated sludge by co-aggregation. (C) 2013 Elsevier B.V. All rights reserved.

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