摘要
采用铁盐混凝方法延缓处理生活污水的膜生物反应器的膜污染.确定了铁盐的投加量,考察了铁盐投加对膜生物反应器中微生物的影响.在实际运行的膜生物反应器中加入混凝剂三氯化铁（以铁计20～60 mg/L）,且在曝气约2h后排泥,测得该膜生物反应器中的难降解有机物浓度降低,同时膜通量有所恢复,表明铁盐混凝方法可有效延缓膜污染.
A membrane bioreactor （MBR） treating domestic wastewater was operated to verify that coagulation can mitigate membrane fouling. The dosage of ferric salt was tested and the influence of ferric salt on the microorganisms＇ activity in the MBR was observed. Ferric chloride （20 - 60 mg/L as Fe（Ⅲ）） was dosed into an operating MBR, and after aeration for about 2 hours, sludge was discharged as usual. At the end of the process, non-biodegradable organics in mixed liquor decreased and the specific flux of the membrane increased in the MBR. The result shows that coagulation, which can be used in the MBR process for treating wastewater, has great potential to mitigate membrane fouling.
出处
《天津大学学报》
EI
CAS
CSCD
北大核心
2007年第9期1066-1070,共5页
Journal of Tianjin University(Science and Technology)
基金
天津市科技攻关计划重大项目(05YFGDGX10000-2)
天津工业大学中空纤维膜材料与膜过程教育部重点实验室开放课题(060533)
南开大学科研启动基金资助项目(J02017)
关键词
膜污染
混凝
三氯化铁
膜生物反应器
membrane fouling
coagulation
ferric chloride
membrane bioreactor
