文献类型：期刊文献

英文题名：Successful startup of a full-scale acrylonitrile wastewater biological treatment plant (ACN-WWTP) by eliminating the inhibitory effects of toxic compounds on nitrification

作者：Han, Yuanyuan[1];Jin, Xibiao[1];Wang, Feng[1];Liu, Yongdi[1];Chen, Xiurong[1]

机构：[1]E China Univ Sci & Technol, Res Inst Environm Engn, Shanghai 200237, Peoples R China

年份：2014

卷号：69

期号：3

起止页码：553

外文期刊名：WATER SCIENCE AND TECHNOLOGY

收录：;EI(收录号：20141217473345);WOS:【SCI-EXPANDED(收录号:WOS:000332074000013)】；

基金：This research was supported by the National Natural Science Foundation of China (No. 51008124) and the National Key Technologies Research and Development Program of China (No. 2008BAE64B06).

语种：英文

外文关键词：acrylonitrile wastewater; ammonia; cyanide; inhibition; nitrification; startup

摘要：During the startup of a full-scale anoxic/aerobic (A/O) biological treatment plant for acrylonitrile wastewater, the removal efficiencies of NH3-N and total Kjeldahl nitrogen (TKN) were 1.29 and 0.83% on day 30, respectively. The nitrification process was almost totally inhibited, which was mainly caused by the inhibitory effects of toxic compounds. To eliminate the inhibition, cultivating the bacteria that degrade toxic compounds with patience was applied into the second startup of the biological treatment plant. After 75 days of startup, the inhibitory effects of the toxic compounds on nitrification were eliminated. The treatment plant has been operated stably for more than 3 years. During the last 100 days, the influent concentrations of chemical oxygen demand (COD), NH3-N, TKN and total cyanide (TCN) were 831-2,164, 188-516, 306-542 and 1.17-9.57 mg L-1 respectively, and the effluent concentrations were 257 +/- 30.9, 3.30 +/- 1.10, 31.6 +/- 4.49 and 0.40 +/- 0.10 mg L-1 (n = 100), respectively. Four strains of cyanide-degrading bacteria which were able to grow with cyanide as the sole carbon and nitrogen source were isolated from the full-scale biological treatment plant. They were short and rod-shaped under scanning electron microscopy (SEM) and were identified as Brevundimonas sp., Rhizobium sp., Dietzia natronolimnaea and Microbacterium sp., respectively.