强化除磷型A/O-MBR工艺运行稳定性  

Running stability in enhanced phosphorus removal A/O-MBR

作　　者：任金柱[1] 李军[1] 王朝朝[1] 刘彬[1] 高金华[2] 常江[2] 

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]北京城市排水集团有限公司,北京100176

出　　处：《环境工程学报》2015年第9期4102-4106,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51078008);北京市自然科学基金资助项目(8122005);国家水体污染控制与治理科技重大专项(2014ZX07201-011)

摘　　要：采用缺氧/好氧膜生物反应器(A/O-MBR)处理合成的生活污水,考察了投加不同浓度的聚合氯化铝(PAC)对该工艺在除磷效能及运行稳定性方面的影响。结果表明,投加PAC可以有效降低出水TP的浓度;在投加量为150 mg/L时,TP的去除率达到最优,为90.1%,出水浓度维持0.48 mg/L左右,达到《城镇污水处理厂污染物排放标准》(GB18918-2002)的一级A标准。投加一定量的PAC可以有效提高微生物的活性;此外,可以降低污泥絮体的Zeta电位,增大污泥絮体的粒径,降低胞外聚合物(EPS)中多糖的浓度,进而有效延缓膜污染的速率。The anoxic/oxic membrane bioreactor（ A /O-MBR） was utilized to treat synthetic domestic sewage,and the influences of different concentrations of poly aluminium chloride（ PAC） on total phosphorus（ TP）removal efficiency and running stability were investigated. The results reveal that dosing PAC reduce the concentration of TP effectively. When the dosage of PAC was 150 mg/L,the removal efficiency of TP was optimal,which reached stably 90. 1%,with on average TP of permeate 0. 48 mg/L,which meets with the first level A criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant（ GB18918-2002）. A certain amount of PAC can improve the activity of microorganisms. It is also found that a certain amount of PAC can reduce Zeta-potential of sludge flocs effectively,increases particle size of sludge flocs,decrease the carbohydrate of extracellular polymeric substances（ EPS）,and retard the rate of membrane fouling.

关 键 词：缺氧/好氧膜生物反应器 聚合氯化铝 污泥絮体 膜污染 

分 类 号：X703[环境科学与工程—环境工程]