强化混凝工艺深度处理给水厂排泥废水  

Advanced treatment of sludge water from water treatment plant by enhanced coagulation

作　　者：武仁超[1,2] 王东升[2] 段晋明[1] 徐绪筝[2] 陈有军 

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055 [2]中国科学院生态环境研究中心饮用水科学与工程中心,北京100085 [3]北京市自来水集团有限责任公司,北京100065

出　　处：《环境工程学报》2012年第6期1915-1918,共4页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51025830);广东省重大科技专项(2009A080303007);国家水体污染控制与治理科技重大专项(2012ZX07408-002)

摘　　要：水厂废水的综合处理与回用是我国供水行业的新趋势和节水目标所在,采用强化混凝技术进行水厂排泥废水的深度处理。通过混凝剂筛选实验和有机物表征确定最佳混凝剂为高效聚合铝(HPAC),适宜投加量为650 mg/L。当混凝剂HPAC投加量为650 mg/L时,对COD、TOC、浊度和色度的去除率分别为82.5%、89.8%、95%和92.5%,相应的出水值分别为58 mg/L、8.46 mg/L、2.35 NTU、13度,COD满足《污水综合排放标准》(GB 8978-1996)的要求(COD≤100 mg/L),同时实验结果显示聚合氯化铝(PAC)、HPAC、三氯化铁(FeCl3)主要去除分子量处于>1 300 Da范围的有机物,对分子量处于744～1 300 Da之间的有机物去除有限。Integrated treatment and recycle of wastewater from water treatment plants becomes new trend and target to save water in water industry.The advanced treatment of filtrate from sludge water was tested by using enhanced coagulation.Results of jar tests and DOM characterization showed that HPAC was the optimum coagulant for filtrate treatment,and the proper dose was 650 mg/L.Removals of COD,TOC,turbidity and color were reached by 82.5%,89.8%,95% and 92.5% with a final value as 59 mg/L,8.46 mg/L,2.35 NTU and 13 degrees,respectively.The effluent COD meets the criteria of the Integrated Wastewater Discharge Standard（GB 8978-1996）.Furthermore,the experimental results revealed that molecular weight（MW） of organics removed by polyaluminium chloride（PAC）,HPAC or ferric chloride were mainly 1 300 Da,while between 744~1 300 Da was only limitedly removed.

关 键 词：强化混凝 排泥水脱滤液 最佳混凝剂 有机物分子量 

分 类 号：X703[环境科学与工程—环境工程]