Influence of operational parameters on nitrogen removal efficiency and microbial communities in a full-scale activated sludge process

被引：101

作者：

Kim, Young Mo ^{[2
]}

Cho, Hyun Uk ^{[3
]}

Lee, Dae Sung ^{[4
]}

Park, Donghee ^{[1
]}

Park, Jong Moon ^{[3
]}

机构：

[1] Yonsei Univ, Dept Environm Engn, Wonju 220710, South Korea

[2] Univ Massachusetts, Dept Civil & Environm Engn, Amherst, MA 01003 USA

[3] Pohang Univ Sci & Technol, Div Adv Nucl Engn, Sch Environm Sci & Engn, Dept Chem Engn, Pohang 790784, South Korea

[4] Kyungpook Natl Univ, Dept Environm Engn, Taegu 702701, South Korea

来源：

WATER RESEARCH | 2011年 / 45卷 / 17期

基金：

新加坡国家研究基金会;

关键词：

Activated sludge; Operational parameter; Nitrogen removal; qPCR; Nitrifying bacteria; Denitrifying bacteria; AMMONIA-OXIDIZING BACTERIA; 16S RIBOSOMAL-RNA; DENITRIFYING BACTERIA; BIOLOGICAL NITROGEN; NITRIFYING BACTERIA; REDUCING BACTERIA; TREATMENT PLANTS; QUANTIFICATION; POPULATIONS; REDUCTASE;

D O I：

10.1016/j.watres.2011.08.063

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

To improve the efficiency of total nitrogen (TN) removal, solid retention time (SRT) and internal recycling ratio controls were selected as operating parameters in a full-scale activated sludge process treating high strength industrial wastewater. Increased biomass concentration via SRT control enhanced TN removal. Also, decreasing the internal recycling ratio restored the nitrification process, which had been inhibited by phenol shock loading. Therefore, physiological alteration of the bacterial populations by application of specific operational strategies may stabilize the activated sludge process. Additionally, two dominant ammonia oxidizing bacteria (AOB) populations, Nitrosomonas europaea and Nitrosomonas nitrosa, were observed in all samples with no change in the community composition of AOB. In a nitrification tank, it was observed that the Nitrobacter populations consistently exceeded those of the Nitrospira within the nitrite oxidizing bacteria (NOB) community. Through using quantitative real-time PCR (qPCR), nirS, the nitrite reducing functional gene, was observed to predominate in the activated sludge of an anoxic tank, whereas there was the least amount of the narG gene, the nitrate reducing functional gene. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：5785 / 5795

页数：11

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