硫酸铁与聚合氯化铝处理城市景观水的比较实验研究

Study on Experimental Comparison of Urban Landscape Water Treatment by Ferric Chloride and Polyaluminum Aluminum chloride

针对城市景观水的水质状况加剧恶化,本文对比在不同情况下用氯化铁及聚合氯化铝处理景观水,探讨了投加量、搅拌速度、搅拌时间、静沉时间以及pH对景观水有机物和浊度去除率的影响。结果表明:当水样pH值在6~8之间时,投加4~6mL混凝剂后,当先中速搅拌(120r/min)2min,最后慢速搅拌(60r/min)搅拌10min。此后静沉35min,此时CODcr去除率及浊度去除率都可达到最佳情况;其中pH为8时,硫酸铁对CODcr去除率可达82%,浊度去除率率为92%;当PH为7时PAC对城市景观水CODcr的去除可达84%,浊度去除率率为96%。聚合氯化铝的处理效果优于硫酸铁,故而得出处理城市景观水时更适合选用聚合氯化铝。

Aiming at the degrading quality of city landscape water,this paper contrasts the different situations to treatment landscape water with ferric chloride and polymerization aluminum chloride.It analyzes the relationship between degradation efficiencies and factors such as the dosage of coagulants,mixing speed,mixing time,Sedimentation time,pH.The experimental results indicate that the CODcrand turbidity removal rate can reach the best condition.At those terms such as the dosage of coagulants is 4 ~ 6mL,the pH is 6 ~ 8,intermediate speed(120r/min),mixing time is 2 min,the low speed(60r/min) mixing time is 10min,the sedimentation time is 35 min,at the PH is 8,the percentage of taking off turbidity of ferric sulfate can be 92% and the reduction in CODcris 82%; at the PH is 7.The percentage of taking off turbidity of PAC can be 96% and the reduction in CODcris 84%.