摘要：

以苏北某制革厂污水处理站为例,介绍了根据制革工业废水污染物浓度高,水质水量多变的特点,从企业的实际出发,结合当地的条件,采用调节-混凝沉淀-生物接触氧化工艺路线处理制革生产综合废水。工程运行表明:在进水COD_Cr和SS平均质量浓度分别为1800mg/ L和1200mg/ L的情况下,排水中的COD_Cr和SS平均质量浓度分别为293mg/ L和185mg/ L,处理后的水质达到了GB8978—1996《污水综合排放标准》中的Ⅱ级标准。该工程因地制宜,投资省,运行费用低,处理效果好,在国内中、小型制革企业的废水治理上具有代表性,有推广价值。

关键词: 制革废水处理, 混凝沉淀, 接触氧化

Abstract:

Taking a wastewater treatment station of a tannery as an example, the characteristics of the wastewater from tanneries are introduced. Its contaminant concentration is high and its water quality and quantity are very changeable. Based on the actual production, combined with the local conditions, and lined with economical principles, the process of adjustment-coagulant sedimentation-biological contact oxidation is adopted to treat this kind of wastewater. Its operation proves that when the average concentration of inflow COD_cr is 1 800 mg / L and that of SS is 1 200 mg / L, the average concentration of outflow COD_cr is 293 mg / L and that of SS is 185 mg / L. The water quality of the treated water has come up to the Second Grade of the Comprehensive Effluent Discharge Standard, GB8978-1996. This project adjusts measures to local conditions, showing that its investment is economical, operation cost is low and the treatment effect is good. It is a representative process of wastewater control in middle-sized and small- sized tanneries. So, it is worth being popularized.

Key words: tannery wastewater treatment, coagulant sedimentation, contact oxidation

中图分类号: 

• X794