新型絮凝剂处理制革废水的试验研究

An Experimental Study on The Leather Wastewater Treatment by A New Flocculent

天然矿物质制成的BKD-2型聚铁盐絮凝剂,其分子通式为犤Fe2(OH)n(SO4)3-n/2犦m,采用该絮凝剂处理制革废水,试验结果表明:在常温,pH值为6～8,絮凝剂的投加量为200mg/L条件下,在原水的CODCr约为3000mg/L,Cr3+约80mg/L,S2-约50mg/L时,CODCr、Cr3+的去除率分别达到65%～70%、60%～65%,且成本较低。

BKD 2 polyferrum salt([Fe 2(OH)n(SO 4)3-n/2]m)floculent made from natural mineral has been used to treat leather wastewater.The characteristics of original water are shown as follows:CODCr is about 3 000 mg/L;Cr 3+is about 80 mg/L;S2-is about 50 mg/L.The experimental results show that the removing rate of CODCr,Cr3+is 65%～70%and 60%～65%respectively in the condition that temperature is normal,pH value is 6～8 and the adding quantity of flocculent is 200 mg/L.And this method has the advantage of low cost.