Simultaneous removal of organic matter and nitrogen by a heterotrophic nitrifying–aerobic denitrifying bacterial strain in a membrane bioreactor----中国科学院微生物研究所

科研成果

论文题目:	Simultaneous removal of organic matter and nitrogen by a heterotrophic nitrifying–aerobic denitrifying bacterial strain in a membrane bioreactor
作者:	Yao Yanchun, Zhang Qingling, Liu Ying, Liu Zhipei*
联系作者:	Liu Zhipei*
刊物名称:	Bioresource Technology
期:	2013
卷:	143
页:	83-87
年份:	2013
影响因子:	5.172
论文下载:	http://www.sciencedirect.com/science/article/pii/S0960852413009103
摘要:	A heterotrophic nitrifying–aerobic denitrifying bacterial strain, Bacillus methylotrophicus L7, was inoculated solely into a submerged membrane bioreactor (MBR) for continuous treatment of artificial sewage. The running conditions were also optimized for improvement of the treatment efficiency. The results indicated that inoculation of this single strain in a single reactor under constant aerobic conditions resulted in simultaneous removal of organic matter and nitrogen, in striking contrast to traditional aerobic nitrification–anaerobic denitrification treatment system and the sequencing batch reactor (SBR) systems. The optimal running conditions for the MBR were dissolved oxygen (DO) 4.5 mg/L, pH 7.5, loading ammonia <100 mg/L, and C/N ratio 3.5. Under these conditions, the removal percentages of chemical oxygen demand (COD), NH4+–N, and TN as high as 96%, 77.5% and 53%, respectively, were achieved without nitrite accumulation.