文献类型：期刊文献

英文题名：Efficient nitrogen removal via simultaneous nitrification and denitrification in a penicillin wastewater biological treatment plant

作者：Luo, Weiwei[1];Jin, Xibiao[1];Yu, Yonglian[1];Zhou, Sichen[1];Lu, Shuguang[1]

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

年份：2014

卷号：35

期号：22

起止页码：2885

外文期刊名：ENVIRONMENTAL TECHNOLOGY

收录：;EI(收录号：20203309045312);WOS:【SCI-EXPANDED(收录号:WOS:000341582000017)】；

基金：This work was supported by the National Environmental Protection Public Welfare Science and Technology Research Program of China under Grant number 201309047; and National Key Technologies Research and Development Program of China under Grant number 2008BAE64B06.

语种：英文

外文关键词：penicillin wastewater; simultaneous nitrification and denitrification; ammonia; total nitrogen; mechanism

摘要：Nitrogen-removal performance was investigated in a penicillin wastewater biological treatment plant (P-WWTP) reconstructed from a cyclic activated sludge system (CASS) tank designed for simultaneous nitrification and denitrification (SND). Good performance was obtained during a 900-day operation period, as indicated by effluent chemical oxygen demand (COD), total nitrogen (TN) and ammonia nitrogen (NH3-N) values of 318 +/- 34, 28.7 +/- 2.4 and < 0.2 mg L-1 when the influent COD, total Kjeldahl nitrogen (TKN) and NH3-N were 3089 +/- 453, 251.4 +/- 26.5 and 124.8 +/- 26.8 mg L-1, respectively. Nitrification and denitrification occurred at different spaces, that is, 71.4% of TN removal occurred in the first 40% of the aeration tank, while 68.8% of the TKN removal occurred in 40-100% of the aeration tank. Sufficient easily biodegradable organics (EBO) in wastewater were key to the occurrence of SND. The denitrification rate under aeration conditions was 10.7 mg N g VSS-1 h(-1) when EBO were sufficient, but 0.98 mg N g VSS-1 h(-1) when EBO were completely degraded. Nitrification primarily occurred in the rear of the aeration tank owing to the competition for oxygen between carbonaceous oxidation and nitrification. The nitrification rate was only 7.13 mg NOD g VSS-1 h(-1) at the beginning of the reaction, but 14.7 mg NOD g VSS (1) h (1) when EBO were completely degraded. These results will facilitate the improvement of nitrogen removal by existing WWTPs. [GRAPHICS]