摘要
采用间歇曝气膜生物反应器(IAMBR)处理模拟含盐生活污水,研究盐浓度在高浓度范围内变化时对反应器运行效能及微生物群落结构的影响.结果表明,当进水盐质量浓度逐渐增加但低于20 g/L时,反应器运行稳定,出水效果良好,总有机碳(TOC)、氨氮(NH4+-N)和总氮(TN)去除率分别高于90%、95%及75%,出水硝态氮较低且保持稳定;当盐质量浓度增加至35 g/L时,反应器的TOC、NH4+-N和TN去除率明显下降,分别下降至80%、70%和50%,出水水质变差,出水硝态氮波动较大.出水亚硝态氮含量不随盐浓度变化而变化,在反应的任何阶段均较低.总细菌和氨氧化细菌(AOB)的PCR-DGGE分析表明,随着进水盐浓度的增加,系统内的微生物群落结构变化较大,优势微生物变化较大,亚硝酸菌属类AOB(Nitrosomonas)的含量有所减少.
Intermittent aerated membrane bioreactor(IAMBR) was used to treat salinity municipal sewage, and the effects of salinity in the high concentration range on the IAMBR and the microbial community structure were studied. The results showed that when the salinity was lower than 20 g/L, the IAMBR was operated stably and the effluent effect was good, and the removal rates of TOC, NH4+-N and TN were above 90%, 95% and 75%, respectively,and the nitrate nitrogen in the effluent was low and stable. When salinity was increased to 35 g/L, the quality of effluent was deteriorated, and the removal rates of TOC, NH4+-N and TN were reduced to 80%, 70% and 50%, respectively, and the nitrate nitrogen in the effluent fluctuated greatly. The nitrite nitrogen in the effluent did not varied with the increase of salinity, and the content was low in any stage of the reaction process. PCR-DGGE analysis of total bacteria and ammonia oxidizing bacteria(AOB) showed that with the increase of the influent salinity, the dominant microorganisms in the system changed and the content of AOB(Nitrosomonas) was reduced.
作者
张磊
ZHANG Lei(Shandong Provincial Key Laboratory of Oilfield Produced Water Treatment and Environmental Pollution Control,Sinopec petroleum Engineering Corporation,Dongying 257026,China)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2020年第5期101-110,共10页
Membrane Science and Technology
基金
中国石化集团公司科技攻关项目(318018-1)
山东省重点研发计划项目(2018GSF117026)
国家自然科学基金项目(51808257)。
关键词
间歇曝气膜生物反应器
高盐生活污水
微生物群落结构
intermittent aeration membrane bioreactor
high salinity municipal wastewater
microbial com-munity structure
