聚丙烯酰胺废水的混凝—吸附优化研究

Study on the optimization of polyacrylamide wastewater treatment by coagulation-adsorption

利用凹凸棒土作为混凝的晶核,采用聚合氯化铝（PAC）作为絮凝剂,研究了处理聚丙烯酰胺（PAM）废水的混凝优化条件。实验表明：只用凹凸棒土作为晶核,可使COD下降30.45%左右;只用PAC作为混凝剂,可使COD下降达43.22%;每200 mL废水中加入75 mg PAC,PAC/凹凸棒土按质量比4∶1投加时,COD去除率为52.32%;每200 mL废水中加入100 mg PAC,PAC/凹凸棒土按质量比6∶1投加时,COD去除率为54.38%。在最优配比下,pH为6~6.5时,COD去除效率最高。

The optimization of polyacrylamide（PAM） wastewater treatment by coagulation-adsorption has been studied.Attapulgite is used as the coagulation crystal nucleus and poly-aluminium chloride（PAC） as coagulant.Experimental results show that COD decreases by 30.45% or so by using attapulgite as crystal nucleus only,and decreases by 43.22% by using PAC as coagulant only.When 75 mg of PAC per 200 mL wastewater is added,and the mass ratio of PAC to attapulgite is 4∶1,the COD decreases by 52.32%.When 100 mg of PAC per 200 mL wastewater is added,the mass ratio of PAC to attapulgite is 6∶1,the COD decreases by 54.38%.According to the optimal ratio,when the pH is 6-6.5,the peak of COD removal rate reaches.