摘要
采用处理规模为31.2 m3/d的超滤中试装置,对江苏省某污水处理厂二沉池出水进行深度处理,着重考察超滤对浑浊度、SS、COD、TP、粪大肠菌群等的去除效果。结果表明:①将投加絮凝剂作为前处理手段可提高超滤时污染物的去除效果并降低跨膜压差增量,投加的硫酸铝质量浓度为2～4 mg/L即可满足出水水质要求;②超滤对浑浊度、SS、COD、TP、粪大肠菌群等去除效果较好,出水中这些指标的值分别为0.33 NTU、0.9 mg/L、5.3 mg/L、0.32 mg/L和0个/L,出水水质优于污水处理厂原深度处理工艺"微絮凝→砂滤→臭氧→氯消毒"的出水水质,满足GB/T 19923—2005《城市污水再生利用工业用水水质》规定的回用作循环冷却水的水质要求。
A pilot study was carried out using uhrafiltration （UF） equipment with a treatment scale of 31.2 m3/d for the advanced treatment of the effluent from the secondary settling tank in a wastewater treatment plant in Jiangsu Province. Using UF, the removal efficiencies of the turbidity, suspended solids （SS） , chemical oxygen demand （COD）, total phosphorus （TP）, and fecal eoliforms were investigated. The results show the following： （1） the pretreatment technique of adding flocculants improved the removal efficiencies of pollutants and reduced the increase of transmembrane pressure, and the effluent met the water quality requirement when 2 mg/L to 4 mg/L of aluminum sulfate was added; and （2） high removal rates of the turbidity, SS, COD, TP, and fecal coliform were obtained： 0. 33 NTU, 0. 9 rag/L, 5.3 mg/L, 0.32 mg/L, and 0 cells/L, respectively. UF performs better than the original advanced treatment technique, through the following process： micro-flocculation to sand filtration to ozonation to chlorination. The water quality of UF effluent meets the requirement for the circulation cooling water in The Reuse of Urban Recycling Water-Water Quality Standard for Industrial Uses （ GB/T 19923-2005 ）.
出处
《水资源保护》
CAS
2013年第3期61-65,共5页
Water Resources Protection
基金
国家水体污染控制与治理科技重大专项(2012ZX07101-003)
高等学校科技创新重大培育资金资助项目(708047)
关键词
超滤膜
污水处理
二沉池出水
污水回用
ultrafiltration membrane
wastewater treatment
effluent from secondary settling tank
wastewaterreuse
