摘要
采用膜生物反应(MBR)工艺连续流小试处理生活污水,对其膨胀过程进行机理解析.结合显微观察和醌指纹技术,对活性污泥混合液中的微生物群落结构的生态演替过程进行连续监测分析.结果表明,MBR内活性污泥微生物多样性低于普通活性污泥,微生物醌的类型也有所区别.MBR内活性污泥从未膨胀到膨胀严重期的活性污泥微生物多样性指数从10.90降到7.12;微生物种分布均匀度指数从0.84降到0.51,发生了逆行演替.对微生物醌组成的分析发现,微生物优势种群随环境变化而波动,UQ-9和MK-6在丝状菌膨胀的污泥中呈现明显优势.
Membrane bioreactor（MBR） has been perceived as a new technique to treat domestic waste water in bench scale.To analyze the mechanism of sludge bulking process,the traditional biological method and modern quinone profiles technique were used to continuously monitor the change of microbial community structure and the micro-ecology succession in MBR.The results showed that the bacterial diversity index of active sludge in MBR was lower than other kinds of active sludge and the types of quinone were different from the others.In the bulking process of MBR the diversity quotient（DQ） and evenness quotient（EQ） of microbe decreased gradually.The DQ was stepped down from 10.90 to 7.12 and EQ stepped down from 0.84 to 0.51,which indicated that a converse succession happened.Through the analysis of different quinone composition by standard quinone sample,it was found that the sludge volume index（SVI） was increased gradually and the systemic removal efficiency of organic matter reduced,which was resulted from the filamentous bacteria growing.The dominant microbial population changed regularly in the filamentous bacterial bulking process,specifically the UQ-9 and MK-6 were dominant in filament bulking sludge.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2010年第12期1483-1487,共5页
Transactions of Beijing Institute of Technology
基金
国家自然科学基金资助项目(50708008)
清华大学国家重点实验室专项基金课题(08K07ESPCT)
