Abstract:

Microorganism selected from sludge can be used as flocculant for treating leather wastewater. The characteristics of original water are as follows: COD is 3 200mg/L; SS is 3 100mg/L and Cr³⁺ is 70mg/L.The experimental results show that the removal rates of COD, SS, Cr³⁺ are 72.4%, 62%, 63.5% respectively on the condition that temperature is 25 ℃, pH value is 7 and V(bioflocculant):V(wastewater)is 0.2. The bioflocculant is harmless.

Key words: bioflocculant, flocculation, leather wastewater, wastewater treatment

摘要：

由污泥中筛选的微生物可作为絮凝剂处理制革废水。制革废水中含COD为3200mg/L、SS为3100mg/L，Cr³⁺为70mg/L，当温度为25℃、pH为7.0时，絮凝剂按V（絮凝剂）：V（废水）=0.2投加时，COD、SS、Cr³⁺的去除率分别为72.4%、62%、63.5%，且絮凝剂本身对环境无害。

关键词: 生物絮凝剂, 絮凝作用, 制革废水, 废水处理

CLC Number: 

• X703.1