文献类型：期刊文献

英文题名：Inhibitory effect of thiourea on biological nitrification process and its eliminating method

作者：Wang, Yuan[1];Jin, Xibiao[1];He, Lijun[1];Zhang, Wei[1]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Res Inst Environm Engn, Shanghai 200237, Peoples R China

年份：2017

卷号：75

期号：12

起止页码：2900

外文期刊名：WATER SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20172903965000);WOS:【SCI-EXPANDED(收录号:WOS:000404557300019)】；

基金：This study was financially supported by National Environmental Protection Public Welfare Science and Technology Research Program of China (No. 201309047) and National Natural Science Foundation China (No. 41201302). In addition, the authors would like to thank all group members for their assistance with experiments.

语种：英文

外文关键词：inhibition; nitrification; thiourea; thiourea-degrading bacteria

摘要：Thiourea is a typical nitrification inhibitor that shows a strong inhibitory effect against the biological nitrification process. The 50% inhibitory concentration (IC50) of thiourea on nitrification was determined to be 0.088 mg g VSS-1, and nitrifiers recovered from the thiourea inhibition after it was completely degraded. The thiourea-degrading ability of the sludge system was improved to 3.06 mg gVSS(-1) h(-1) through cultivation of thiourea-degrading bacteria by stepwise increasing the influent thiourea concentration. The dominant thiourea-degrading bacteria strain that used thiourea as the sole carbon and nitrogen source in the sludge system was identified as Pseudomonas sp. NCIMB. The results of this study will facilitate further research of the biodegradation characteristics of thiourea and similar pollutants.