复合絮凝剂(PAC+PAM+磁粉)处理热轧废水的试验研究
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摘要
将磁粉与聚合氯化铝(PAC)、聚丙烯酰胺(PAM)联用组成复合絮凝剂来处理热轧废水。在改变絮凝剂各组分投加量的条件下进行絮凝试验,分析热轧废水的浊度和含油量变化,研究复合絮凝剂的最优投加方案。试验结果表明,当磁粉、PAC和PAM的投加量分别为5mg/L、15mg/L和1.5mg/L时,热轧废水的净化效果最佳,其浊度由82.6NTU降为10.5NTU,含油量由15.62mg/L降为7.44mg/L。
A composite flocculant made up of magnetic powder,polyaluminium chloride(PAC)and polyacrylamide(PAM)was used in the hot rolling wastewater treatment.Flocculation tests were conducted with different added quantities of each flocculant component.The variations in turbidity and oil content of the wastewater were analyzed,and the optimum dosage of the composite flocculant was studied.Experimental results show that the best purifying effect for the hot rolling wastewater is obtained when the dosages of magnetic powder,PAC and PAM are 5mg/L,15mg/L and 1.5 mg/L,respectively.Under that condition,turbidity of the wastewater decreases from 82.6 NTU to 10.5NTU and oil content drops from 15.62mg/L to 7.44mg/L.
A composite flocculant made up of magnetic powder,polyaluminium chloride(PAC)and polyacrylamide(PAM)was used in the hot rolling wastewater treatment.Flocculation tests were conducted with different added quantities of each flocculant component.The variations in turbidity and oil content of the wastewater were analyzed,and the optimum dosage of the composite flocculant was studied.Experimental results show that the best purifying effect for the hot rolling wastewater is obtained when the dosages of magnetic powder,PAC and PAM are 5mg/L,15mg/L and 1.5 mg/L,respectively.Under that condition,turbidity of the wastewater decreases from 82.6 NTU to 10.5NTU and oil content drops from 15.62mg/L to 7.44mg/L.
引文
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[2]张景来,王剑波,常冠钦,等.冶金工业污水处理技术及工程实例[M].北京:化学工业出版社,2003.
[3]熊国宏,苍大强,李素芹,等.低浊、高油轧钢浊环水处理试验研究[J].工业水处理,2008,28(6):39-42.
[4]于尔捷,陈浩,姜安玺.用复合絮凝剂处理含乳化油废水的试验研究[J].安全与环境学报,2002,2(4):3-6.
[5]巩恩辉.轧钢废水处理的工艺分析[J].科技信息,2012(19):289-290.
[6]Yang W Y,Qian J W,Shen Z Q.A novel flocculant of Al(OH)3-polyacrylamide ionic hybrid[J].Journal of Colloid and Interface Science,2004,273(2):400-405.
[7]王进,陈卫,刘成.磁粉与PAM联用强化饮用水处理的试验研究[J].科学技术与工程,2014,14(5):197-200.
[8]陈瑜,李军,陈旭娈,等.磁絮凝强化污水处理的试验研究[J].中国给水排水,2011,27(17):78-81.
[9]Tansel B,Dimitric-Clark V.Microscopic characterization of oil droplets removed by flocs after coagulation of oil-water emulsions[J].Journal of Environmental Science and Health Part A,2002,37(2):127-138.
[10]Bache D H,Johnson C,McGilligan J F,et a1.A conceptual view of floc structure in the sweep floc domain[J].Water Science and Technology,1997,36(4):49-56.