强化混凝技术处理南淝河污染水的效果  

Effect of enhanced coagulation technology for treatment of polluted water from Nanfei River

作　　者：陈义飞[1] 孙琴[2,3] 丁士明[3] 姚羽[2] 陈开宁[4] 孙庆业[5] 

机构地区：[1]上海市政工程设计研究总院第六设计院,安徽合肥230001 [2]河海大学浅水湖泊综合治理与资源开发教育部重点实验室,江苏南京210098 [3]河海大学环境学院,江苏南京210098 [4]中国科学院南京地理与湖泊所湖泊与环境国家重点实验室,江苏南京210008 [5]安徽大学资源与环境工程学院,安徽合肥230039

出　　处：《水资源保护》2015年第4期103-110,共8页Water Resources Protection

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07103-002)

摘　　要：选用聚合氯化铁(PFC)、聚合硫酸铁(PFS)、聚合氯化铝(PAC)和聚合氯化铝铁(PAFC)作为混凝剂;选用阳离子型聚丙烯酰胺(CPAM)、阴离子型聚丙烯酰胺(APAM)和非离子型聚丙烯酰胺(NPAM)作为助凝剂,通过室内试验对比研究强化混凝技术中多种混凝剂单用及其和助凝剂联用对南淝河污染水的除浊和去污效果,并用于南淝河现场构建的混凝沉淀系统。结果表明,4种混凝剂单用时,PAFC对浊度、TP去除效果最优,对CODMn有良好的去除效果,且不影响原水的p H值,而PFC和PFS单用时可明显降低原水p H值,4种混凝剂单用时对TN均没有明显去除效果;PAFC与CPAM联用时对浊度的去除效果最佳,明显优于PAFC与APAM和NPAM联用和PAFC单用的效果;混凝剂与CPAM联用提高了其除浊和去除TP的能力,但不能明显改善其去除CODMn的效果,对原水p H和TN的影响与单用时相同。选取"PAFC+CPAM"作为南淝河示范工程的混凝剂和助凝剂,现场混凝沉淀出水水质稳定,浊度和TP的去除效果较好,去除率分别达到90%和80%,对CODMn的去除率约为52%,而对TN的去除效果有限,去除率约为22.4%。A series of indoor experiments were conducted to investigate the effects of different coagulants used single or combined with coagulant aids on removal of turbidity and decontamination of polluted water from Nanfei River, which will be further applied in coagulation and precipitation system of on-site construction for this river. Polymeric ferric chloride ( PFC ) , polymeric ferric sulfate ( PFS ) , polyaluminum chloride ( PAC ) and polyaluminum ferric chloride ( PAFC) were selected as coagulants, and cationic polyacrylamide ( CPAM) , anionic polyacrylamide ( APAM) and non-ionic polyacrylamide ( NPAM) as coagulant aids.The results showed that four coagulants used only PAFC had high removal effect on turbidity, TP and CODMn , and did not affected the pH value of raw water, while the PFC and PFS which were used alone obviously reduced the pH value of raw water, Four coagulants which were used alone had little effect on removal of TN in water; The combined use of PAFC and CPAM has the best effect on turbidity, comparing to the effect of single use of PAFC, and their combined use with APAM;The combined uses of coagulants and CPAM enhanced the removal effect of turbidity and TP, but had few effects on the removal of CODMn, and their effects on the pH value of raw water and TN values were similar to their single use.PAFC+CPAM was selected as coagulant and coagulant aid for demonstrative project site of Nanfei River.their combined use achieved a stable treatment, and the turbidity and TP removal effect is good, the removal effect of turbidity and TP was 90%and 80% respectively; the removal rate of CODMn was about 52%;while the removal effect of TN was limited, the removal rate was only about 22.4%.

关 键 词：强化混凝技术 混凝剂 助凝剂 污染水 

分 类 号：X522[环境科学与工程—环境工程]