摘要
在原水pH值为6.5～8.5的条件下,采用常规的生活饮用水净化工艺(混凝/沉淀/过滤/消毒),在原水中投加高盐基度(≥85%)的聚氯化铝(PAC)混凝剂,投加量控制在1.0～5.0mg/L(以Al2O3计),控制沉淀水浊度在1.0～3.0 NTU、滤后水浊度≤1.0 NTU,可使净化后饮用水中的残留铝含量在0.05～0.11 mg/L,明显低于《生活饮用水卫生标准》(GB 5749—2006)的铝含量限值(0.2 mg/L),为生活饮用水卫生安全提供了有力保障。另外,与其他铝盐混凝剂相比,采用高盐基度PAC混凝剂净化生活饮用水的药剂成本更低,有利于提高水厂的经济效益和降低居民生活成本。
A coagulation/sedimentation/filtration/disinfection process was used to purify drinking water with pH values of 6.5 to 8.5. Residual aluminium levels of 0.05 to 0.11 mg/L in the purified water could be achieved by dosing high basicity （ ≥ 85 % ） polyalumiuium chloride （PAC） with dosages of 1.0 to 5.0 mg/L （based on A1203 ） and controlling water turbidities before filtration at 1.0 to 3.0 NTU and ≤ 1.0 NTU after filtration. The result was lower than the aluminium limit （0.2 rag/L） in the Standards for Drinking Water Quality （ GB 5749 - 2006）. The cost of high bacisity PAC for purifying drinking water was lower than the cost of other aluminium coagulants.
出处
《中国给水排水》
CAS
CSCD
北大核心
2013年第7期52-55,共4页
China Water & Wastewater
关键词
聚氯化铝
高盐基度
饮用水
残留铝
polyaluminium ehloride
high basieity
drinking water
residual aluminium
