Effect of intermittent aeration on the microbial community structure of activated sludge in a submerged membrane bioreactor

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	Effect of intermittent aeration on the microbial community structure of activated sludge in a submerged membrane bioreactor
	Chang, Jun-Jun 1,2; Liang, Wei 1; Xiao, En-Rong 1; Wu, Zhen-Bin 1
刊名	WATER AND ENVIRONMENT JOURNAL
	2011-06-01
卷号	25 期号:2 页码:214-218
关键词	intermittent aeration microbial community structure phospholipid fatty acids (PLFAs) submerged membrane bioreactor treatment performance
ISSN号	1747-6585
通讯作者	Liang, W, Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China ; liangwei02@tsinghua.org.cn
中文摘要	Low removal rate for total nitrogen (TN) is the main limitation of a membrane bioreactor (MBR). The effects of intermittent aeration on the removal of TN and the microbial community structure of activated sludge from a submerged membrane bioreactor (SMBR) operating at three different aeration on/off times (run 1, continuous aeration; run 2, 60/60 min aeration on/off time; and run 3, 60/75 min aeration on/off time) were studied. The results showed that the removal rates for TN under different operation conditions were 26.2% (run 1), 59.5% (run 2) and 70.7% (run 3), respectively, and significant improvements were achieved. Monounsaturated phospholipid fatty acids (PLFAs) and saturated PLFAs were dominant PLFA types in activated sludge, followed by branched PLFAs; cyclopropane fatty acid were relatively small in amount. The highest ratio of the characteristic fatty acid representing the abundance of bacteria in activated sludge was found in run 2. Aerobic prokaryotes were the predominant groups under all three operation conditions, followed by the anaerobic bacteria and the Gram-positive bacteria group; sulphate-reducing bacteria (SRB) and other anaerobic bacteria occupied the lowest proportion. Intermittent aeration can be used as a possible means to improve the treatment performance in an MBR.
英文摘要	Low removal rate for total nitrogen (TN) is the main limitation of a membrane bioreactor (MBR). The effects of intermittent aeration on the removal of TN and the microbial community structure of activated sludge from a submerged membrane bioreactor (SMBR) operating at three different aeration on/off times (run 1, continuous aeration; run 2, 60/60 min aeration on/off time; and run 3, 60/75 min aeration on/off time) were studied. The results showed that the removal rates for TN under different operation conditions were 26.2% (run 1), 59.5% (run 2) and 70.7% (run 3), respectively, and significant improvements were achieved. Monounsaturated phospholipid fatty acids (PLFAs) and saturated PLFAs were dominant PLFA types in activated sludge, followed by branched PLFAs; cyclopropane fatty acid were relatively small in amount. The highest ratio of the characteristic fatty acid representing the abundance of bacteria in activated sludge was found in run 2. Aerobic prokaryotes were the predominant groups under all three operation conditions, followed by the anaerobic bacteria and the Gram-positive bacteria group; sulphate-reducing bacteria (SRB) and other anaerobic bacteria occupied the lowest proportion. Intermittent aeration can be used as a possible means to improve the treatment performance in an MBR.
学科主题	Environmental Sciences; Limnology; Water Resources
WOS标题词	Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
类目[WOS]	Environmental Sciences ; Limnology ; Water Resources
研究领域[WOS]	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
关键词[WOS]	MUNICIPAL WASTE-WATER ; FATTY-ACIDS ; BIOFILM REACTOR ; EUTROPHIC BAYS ; SOIL ; REMOVAL ; SEDIMENTS ; PATTERNS ; BIOMASS
收录类别	SCI
资助信息	Key Science Research Project of Eleven Five-year Plan [2008ZX07106-003, 2008ZX07316-004]; CAS [TJZX2-YW-07]
语种	英语
WOS记录号	WOS:000290269100008
公开日期	2011-06-30
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/15664]
专题	水生生物研究所_水环境工程研究中心_期刊论文
作者单位	1.Chinese Acad Sci, State Key Lab Freshwater Ecol & Biotechnol, Inst Hydrobiol, Wuhan 430072, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Chang, Jun-Jun,Liang, Wei,Xiao, En-Rong,et al. Effect of intermittent aeration on the microbial community structure of activated sludge in a submerged membrane bioreactor[J]. WATER AND ENVIRONMENT JOURNAL,2011,25(2):214-218.
APA	Chang, Jun-Jun,Liang, Wei,Xiao, En-Rong,&Wu, Zhen-Bin.(2011).Effect of intermittent aeration on the microbial community structure of activated sludge in a submerged membrane bioreactor.WATER AND ENVIRONMENT JOURNAL,25(2),214-218.
MLA	Chang, Jun-Jun,et al."Effect of intermittent aeration on the microbial community structure of activated sludge in a submerged membrane bioreactor".WATER AND ENVIRONMENT JOURNAL 25.2(2011):214-218.