Methane and nitrous oxide emissions from a two-stage membrane bioreactor applied in municipal landfill leachate treatment

被引:8
|
作者
Chiemchaisri, Chart [1 ]
Chiemchaisri, Wilai [1 ]
Manochai, Nipaporn [1 ]
机构
[1] Kasetsart Univ, Fac Engn, Dept Environm Engn, 50 Ngam Wong Wan Rd, Chatuchak, Bangkok 10900, Bangkok, Thailand
关键词
Bacteria community; Greenhouse gas; Membrane bioreactor; PCR-DGGE; GREENHOUSE-GAS EMISSION; WASTE-WATER; FOOD WASTE; TREATMENT PERFORMANCE; SLUDGE; DIGESTION; BMP;
D O I
10.1007/s10163-020-00974-y
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The emissions of two major greenhouse gases, i.e., CH4 and N2O, during the treatment of partially stabilized municipal solid waste leachate by a practical-scale two-stage membrane bioreactor (MBR) were investigated. The system consisted of anoxic and aerobic reactors that had a total hydraulic retention time (HRT) of 4 days and were operated with internal sludge recirculation at 100% of the influent flow rate. At steady operation, high organic and nitrogen removals of 99% for BOD, 97% for COD, 99% for TOC and 94% for TKN were achieved. During operation, high direct CH4 emissions from the anoxic reactor, accounting for 90% of the total emissions from the system and 16.2% of the total organic carbon mass removed, were observed. N2O was emitted to a much lower extent, and N2O emissions varied much less between the reactors. The presence of methane- and nitrous oxide-producing bacteria was confirmed by PCR-DGGE and real-time PCR analyses. The operation of the two-stage MBR with sludge recirculation enabled the co-existence of CH4- and N2O-producing microorganisms in the sludge from the anoxic and aerobic reactors, with an approximately 30% difference in their microbial communities.
引用
收藏
页码:365 / 374
页数:10
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