PDM复合混凝剂处理春季嘉陵江水的应用研究  

Application study on Jialing River raw water treatment using poly-dimethyldiallylammoniu chloride(PDM)in spring

作　　者：向平[1,2] 蒋绍阶[1,2] 张智[1,2] 张南 赖莉 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400045 [2]重庆大学城市建设与环境工程学院,重庆400045 [3]重庆中法供水有限公司,重庆400021 [4]中国市政工程西南设计研究总院,成都610081

出　　处：《给水排水》2011年第9期30-35,共6页Water & Wastewater Engineering

基　　金：国家水体污染控制与治理科技重大专项(2009ZX07424-004);"十一五"国家科技支撑重点项目(2007BAB21B01)

摘　　要：通过小试考察了聚二甲基二烯丙基氯化铵(PDM)复配硫酸铝(AS)、氯化高铁(FC)、聚氯化铝(PAC)和聚硫酸铁(PFS)以及单独采用PAC处理某水厂春季嘉陵江水源水的效果,选择了复配比例为1:100的PAC-PDM复合混凝剂处理该时期原水。通过对矾花与沉降性能的研究,发现复配比例越低,投药量越少,矾花粒径越小。当矾花粒径达到0.5 mm以上时,矾花的沉降性能较好,且矾花的沉降性能还与矾花的密实程度有很大关系。通过对PAC和PAC-PDM连续生产对比试验研究,在出厂水满足《生活饮用水卫生标准》(GB 5749—2006)要求的情况下,PAC-PDM和PAC的平均投药量分别约为8mg/L和14.3mg/L,在春季该水厂采用PAC-PDM处理嘉陵江原水较单独采用PAC约节省30%混凝剂费用。Jar tests were used to study the effects of polydimethyldiallylammonittrn chloride （PDM）, aluminum sulfate （AS）, ferric chloride （FIE）, polyaluminum chloride （PAC） and polymeric ferric sulfate （PFS）, and PAC on the treatment of raw water from Jialing River in spring, and the PACPDM with mass ratio of 1 ： 100 was selected as the coagulant for the treatment of raw water in this period. Through the performance study on flocculate and sedimentation, it was found that the lower ratio and the less dosage, the smaller the flocculate. When the flocculate diameter was above 0. 5 mm, the sedimentation performance was good, and the flocculate sedimentation performance also had close relationship with the flocculate compaction rate. Through the continuous production comparative study on PAC and PAC- PDM, on the premise of meeting the Standards for drinking water quality （GB 5749-2006）, PAC - PDM and PAC average dosage were 8 mg/L and 14. 3 mg/L respectively, which saved 30% dosage cost compared with solo PAC for this water plant in the treatment of Jialing River raw water in spring.

关 键 词：混凝 聚氯化铝(PAC) 聚二甲基二烯丙基氯化铵(PDM) 矾花 

分 类 号：TU991.25[建筑科学—市政工程]