Hangzhou Environmental Research Institute,China Coal Technology and Engineering Group

针对高浊度矿井水胶粒含量大、粒径小、体积质量小等水质特点,开展了混凝剂聚合氯化铝(PAC)与聚丙烯酰胺(PAM)不同投加方式的混凝试验研究,考察了混凝剂各投加方式下的最佳剂量及处理效果,并对PAC与PAM最佳投加间隔时间进行分析。结果表明,原水浊度为2 450 NTU,采用先投加0.5 mg/L浓度PAM,后投加100 mg/L浓度PAC及0.4 mg/L浓度PAM的混凝剂投加方式,出水浊度取得最低值4.6 NTU,总药剂成本最低。PAC与PAM不同投加间隔时间中,PAM的投加点滞后于PAC投加点120 s时混凝效果最佳。

According to high colloidal particle contents, small particle diameter,small volume quantity and other water quality features ofthe high turbidity mine water,a coagulation test study was conducted on different feeding modes of a coagulant with PAC and PAM. An op-timum dosage and treatment effect of the coagulant under each feeding mode was investigated and an analysis was conducted on an opti-mum feeding interval time of PAC and PAM. The results showed that a turbidity of the original wa ter was 2 450 NTU,a first PAM feedingwith a concentration of 0.5 mg/ L was applied and then a second PAC feeding with a concentration of 100 mg/ L and a PAM feeding witha concentration of 0.4 mg/ L was applied,a min turbidity of 4.6 NTU was measured in the water outlet and the total cost of coagulant wasthe lowest. In different feedin g interval time of PAC and PAM,when a feeding point of PAM was 120 s delay then the feeding point ofPAC,the coagulation effect would be the best.

科技部科研院所技术开发研究专项资助项目(2013EG122133)；