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Bioresour Technol

Title:		Acetonitrile wastewater treatment enhanced by a hybrid membrane-aerated bioreactor containing aerated and non-aerated zones
Author(s):		Mei X; Chen Y; Fang C; Xu L; Li J; Bi S; Liu J; Wang Y; Li P; Guo Z; Qin H; Gu J; Xiao Y; Yang X; Zhou B; Zhang Z;
Address:		"College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China. Electronic address: meixiang1967@yahoo.com. College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China. State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China. Nanjing Haiyi Environmental Protection Engineering Co., Ltd., Nanjing 211200, China. Nanjing RGE Membrane Tech Co., Ltd., Nanjing 210012, China"
Journal Title:		Bioresour Technol
Year:		2019
Volume:		20190703
Issue:
Page Number:		121754 -
DOI:		10.1016/j.biortech.2019.121754
ISSN/ISBN:		1873-2976 (Electronic) 0960-8524 (Linking)
Abstract:		"Acetonitrile (ACN) is a very volatile, toxic and nitrogen-rich organic compound. To enhance ACN wastewater treatment, a novel hybrid membrane-aerated bioreactor (MAB) containing aerated and non-aerated zones was established. A polypropylene hollow fiber membrane module (HF) and a silicone rubber membrane module (SR) were separately used as the bubble-free aeration diffuser and the biofilm carrier, and the non-aerated zones of these two types of reactors were packed with ceramsite. When the influent ACN loading was 1.200?ª+kg/m(3).d, under aeration pressures of 20?ª+kPa in the HF-MAB and 40?ª+kPa in the SR-MAB, ACN removal loadings of 1.116?ª+kg/m(3).d and 1.004?ª+kg/m(3).d, respectively, were achieved, and the TN (total nitrogen) removal loadings were 0.267?ª+kg/m(3).d and 0.246?ª+kg/m(3).d, respectively. In the MABs, different stratified biofilm structures of the two zones and the diffusion and counter-diffusion of oxygen synergistically promoted ACN degradation, nitrification and denitrification"
Keywords:		"Acetonitriles/metabolism Biofilms Biological Oxygen Demand Analysis *Bioreactors Denitrification Nitrification Nitrogen/chemistry Oxygen/metabolism Waste Disposal, Fluid Wastewater/*chemistry Acetonitrile wastewater Aerated zone Biological nitrogen remova;"
Notes:		"MedlineMei, Xiang Chen, Ying Fang, Chenhong Xu, Lijie Li, Junhui Bi, Shuqi Liu, Juan Wang, Yong Li, Pengpeng Guo, Zhongwei Qin, Hailing Gu, Jiawei Xiao, Yanyan Yang, Xu Zhou, Baochang Zhang, Ze eng England 2019/07/22 Bioresour Technol. 2019 Oct; 289:121754. doi: 10.1016/j.biortech.2019.121754. Epub 2019 Jul 3"