Responses of biofilm characteristics to variations in temperature and NH4+-N loading in a moving-bed biofilm reactor treating micro-polluted raw water

被引：72

作者：

Zhang, Shuangfu ^{[1
]}

Wang, Yayi ^{[1
]}

He, Weitao ^{[1
]}

Wu, Min ^{[1
]}

Xing, Meiyan ^{[1
]}

Yang, Jian ^{[1
]}

Gao, Naiyun ^{[1
]}

Yin, Daqiang ^{[1
]}

机构：

[1] Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resources Reuse, Shanghai 200092, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2013年 / 131卷

基金：

中国国家自然科学基金;

关键词：

Micro-polluted raw water; Temperature; NH4+-N loading; Biofilm characteristics; Moving-bed biofilm reactor; NITRIFYING BACTERIA; NITRIFICATION; BIOREACTOR; PRODUCTS; REMOVAL; PROBES;

D O I：

10.1016/j.biortech.2012.12.172

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

A pilot-scale moving-bed biofilm reactor (MBBR) for biological treatment of micro-polluted raw water was operated over 400 days to investigate the responses of biofilm characteristics and nitrification performance to variations in temperature and NH4+-N loading. The mean removal efficiency of NH4+-N in the MBBR reached 71.4 +/- 26.9%, and batch experiments were performed to study nitrification kinetics for better process understanding. Seven physical-chemical parameters, including volatile solids (VS), polysaccharides (PS) and phospholipids (PL) increased firstly, and then rapidly decreased with increasing temperature and NH4+-N loading, and properly characterized the attached biomass during biofilm development and detachment in the MBBR. The biofilm compositions were described by six ratios, e.g., PS/VS and PL/VS ratios showed different variation trends, indicating different responses of PS and PL to the changes in temperature and NH4+-N loading. Furthermore, fluorescent in situ hybridization (FISH) analysis revealed that increased NH4+-N loadings caused an enrichment of the nitrifying biofilm. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：365 / 373

页数：9

共 34 条

[1] COMBINATION OF 16S RIBOSOMAL-RNA-TARGETED OLIGONUCLEOTIDE PROBES WITH FLOW-CYTOMETRY FOR ANALYZING MIXED MICROBIAL-POPULATIONS [J].