摘要
固定膜-活性污泥系统具有高效的脱氮效果,是传统活性污泥法升级改造的优选技术之一。对采用该工艺的上海某污水厂进行近2年监测,分析了该系统悬浮相和附着相的细菌多样性及脱氮关键菌,结果表明:1)悬浮相中细菌多样性及均匀度均优于附着相,两相生长的优势细菌有明显差别;2)NOB菌属的Nitrospira菌为整个系统的脱氮关键菌,且主要集中于附着相上;3)4号曝气池中Nitrospira细菌数量明显高于2号池,尤其在低温条件下,表明4号池附着相是脱氮反应的主要发生场所,且能够耐受冬季低温的不利影响。综上,论文从不同相态下功能微生物的角度阐明了其脱氮原理。
The integrated fixed-film activated sludge（ IFAS） system is one of the modifications of traditional activated sludge process because of efficient denitrification. Continuous experiments in nearly two years were conducted in a sewage plant in Shanghai,which operated as a pilot-scale IFAS system. This study mainly focused on bacterial diversity and key denitrification bacteria in suspended and attached samples in IFAS. The results showed that： 1） the diversity and evenness of bacterial community in suspended phases were higher than those in attached phases,and obvious distinctions were investigated among predominant bacteria; 2） Nitrospira（ NOB） was the key denitrification bacteria and mainly concentrated in attached phases;3） the number of Nitrospira in the fourth aeration tank was obviously higher than that in the second,especially in lower temperatures,which indicated that denitrification mainly happened in the fourth aeration tank and attached phases. The mechanism of denitrification in IFAS was studied based on function bacteria.
出处
《环境工程》
CAS
CSCD
北大核心
2016年第8期36-39,49,共5页
Environmental Engineering
基金
水体污染控制与治理科技重大专项子课题(2012ZX07313-001)
