SBR生物反应器出水溶解态有机物性质特点研究  

Characterization of the dissolved organic matter in the sewage effluent of an SBR

作　　者：郭瑾[1] 张静蓉[1] 尚会来[1] 唐旭光[1] 彭永臻[1] 

机构地区：[1]北京工业大学环境与能源工程学院,北京100124

出　　处：《环境科学学报》2011年第1期20-25,共6页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No. 50808003);北京工业大学博士科研启动经费(No. X0005013200801)~~

摘　　要：研究中考察了SBR生物反应器处理实际生活污水过程中,反应器内部溶解性有机物的变化情况,重点分析了污泥龄对于SBR反应器出水溶解态有机物性质特点的影响.研究结果表明,生物降解过程中,以分子量650Da、1700Da和2000Da为代表的腐殖质类有机物逐渐积累,小分子量有机物(<200Da)逐渐转化为具有中间分子量(500～3000Da)的腐殖质类有机物和大分子量(>10000Da)微生物代谢产物;污泥龄对SBR反应器出水溶解态有机物分子量分布情况的影响不大,污泥龄较长的SBR反应器其出水有机物在分子量650Da和20000Da处表现出较弱的紫外吸收强度和荧光强度,表明较长的污泥龄有助于腐殖质类有机物和溶解态微生物代谢产物的降解.The transformation of dissolved organic matter in sequencing batch reactors was investigated by treating domestic wastewater in an SBR with different operational parameters. The impact of sludge retention time （SRT） was mainly analyzed with respect to the characterization of effluent organic matter （EfOM） in sewage effluent from the SBR. The results revealed that humic-like substances with molecular weight （MW） of 650 Da,1700 Da and 2000 Da were accumulated during the biological degradation process. Medium MW （500-3000Da,humic substances） and large MW organic materials （10000Da,SMPs） were transformed into low MW organic materials. The molecular weight distribution of EfOM in sewage effluent was rarely impacted by SRT,only an intensity difference in MW of 650 Da and 20,000 Da was observed,which means that a longer SRT was helpful for the degradation of humic-like substances and soluble microbial products （SMPs）.

关 键 词：污泥龄 二级生化出水有机物 分子量分布 微生物代谢产物 

分 类 号：X703.1[环境科学与工程—环境工程]