Effect of COD/N ratio on nitrogen removal and microbial communities of CANON process in membrane bioreactors

被引：97

作者：

Zhang, Xiaojing ^{[1
]}

Zhang, Hongzhong ^{[1
]}

Ye, Changming ^{[1
]}

Wei, Mingbao ^{[1
]}

Du, Jingjing ^{[1
]}

机构：

[1] Zhengzhou Univ Light Ind, Sch Mat & Chem Engn, Henan Collaborat Innovat Ctr Environm Pollut Cont, Zhengzhou 450001, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2015年 / 189卷

关键词：

CANON; COD/N; Membrane bioreactor (MBR); Microbial community; Denitrification; SIMULTANEOUS PARTIAL NITRIFICATION; DENITRIFICATION SNAD PROCESS; WASTE-WATER; ORGANIC-CARBON; OXIDIZING BACTERIA; FUNCTIONAL GENES; SINGLE REACTOR; ANAMMOX; NITRITE; PERFORMANCE;

D O I：

10.1016/j.biortech.2015.04.006

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

In this study, the effect of COD/N ratio on completely autotrophic nitrogen removal over nitrite (CANON) process was investigated in five identical membrane bioreactors. The five reactors were simultaneously seeded for 1 L CANON sludge and be operated for more than two months under same conditions, with influent COD/N ratio of 0, 0.5, 1, 2 and 4, respectively. DGGE was used to analyze the microbial communities of aerobic ammonia-oxidizing bacteria (AOB) and anaerobic ammonia-oxidizing bacteria (AAOB) in five reactors. Results revealed the harmonious work of CANON and denitrification with low COD concentration, whereas too high COD concentration suppressed both AOB and AAOB. AOB and AAOB biodiversity both decreased with COD increasing, which then led to worse nitrogen removal. The suppressing threshold of COD/N ratio for CANON was 1.7. CANON was feasible for treating low COD/N sewage, while the high sewage should be converted by anaerobic biogas producing process in advance. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：302 / 308

页数：7

共 33 条

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