处理低温、低浊宁波白溪水库水的混凝剂优化  

Optimization of Coagulants for Treatment of Low-temperature and Turbidity Raw Water from Ningbo Baixi Reservoir

作　　者：张跃军[1] 赵晓蕾[1] 李潇潇[1] 印东凯[1] 吴晓莉[1] 苏功建 

机构地区：[1]南京理工大学化工学院,江苏南京210094 [2]宁波市自来水总公司,浙江宁波315041

出　　处：《中国给水排水》2007年第13期52-55,共4页China Water & Wastewater

基　　金：国家"十五"科技攻关课题(2003BA327C);南京市科技计划项目(04d251016)

摘　　要：通过烧杯试验,考察了聚合氯化铝(PAC)、聚合硫酸铁(PFS)及两者分别与聚二甲基二烯丙基氯化铵(PDM)复配后对低温、低浊白溪水库水的除浊效果。结果表明:对温度<10℃、浊度约为1.5 NTU的原水,在试验确定的混凝搅拌条件下,PFS的处理效果最佳,在3 mg/L的投量下可使剩余浊度<0.2 NTU;投加PAC时,能在2.5 mg/L的投量下将剩余浊度降至最低,为0.8NTU。PDM与PFS复配后,最低能使剩余浊度降至0.4 NTU左右,除浊效果比单独使用PFS时差;PDM与PAC复配后,没有明显的除浊效果。PFS可用于对低温、低浊白溪水库水的混凝处理,PDM不适宜作为其强化混凝的助凝剂。The removal effects of turbidity from Baixi Reservoir raw water with low-temperature and turbidity by polyaluminum chloride （PAC）, polyferric sulfate （PFS） and the composites of both with poly-dimethyl-diallyl-ammonium chloride （PDMDAAC） were investigated using jar tests. The results indicate that under the condition of agitation intensity in the experiment, PFS is the best for treating the raw water with turbidity of 1.5 NTU and temperature of below 10℃. PFS dosage of 3 mg/L can efficiently decrease the turbidity to its lowest value of 0.2 NTU while PAC dosage of 2.5 mg/L can decrease the turbidity to its lowest value of 0.8 NTU. When the combined PFS/PDMDAAC composite coagulants are used, the lowest value of turbidity is 0.4 NTU, which is not as good as individual use of PFS. When the combined PAC/PDMDAAC composite coagulants are used, the removal effect of turbidity is not visible. As a result, PFS is more efficient in removal of turbidity from Baixi Reservoir raw water with low-temperature and turbidity, and PDMDAAC is not suitable to be used as coagulant aid.

关 键 词：低温低浊水 混凝剂 助凝剂 除浊 

分 类 号：TU991.22[建筑科学—市政工程]