【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。更多还原

【Abstract】 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%) polyaluminium chloride(PAC) with dosages of 1.0 to 5.0 mg/L(based on Al2O3) 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 mg/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.更多还原