摘要：

针对四川某农药生产废水含盐量高、有机物浓度高、生物毒性大及可生化性差等特点，采用多元微电解-类Fenton氧化-混凝沉淀工艺进行了强化预处理研究。通过正交试验对多元微电解的填料填充比、反应时间、pH、曝气量等参数进行了优化，并确定了类Fenton段H₂O₂的适宜投加量。结果表明，对于COD ≤ 18 000 mg/L、电导率≤ 78 000 μS/cm的进水，在优化的工艺条件下经预处理后，COD和SS去除率分别达到62.6%、65%，为后续生化处理提供了良好的进水水质。

关键词: 高浓度农药生产废水, 多元微电解, 类Fenton氧化, 混凝沉淀

Abstract:

In view of the characteristics of a pesticide production wastewater in Sichuan with high salt content, high organic matter concentration, high biological toxicity and poor biodegradability, the process of multi-element microelectrolysis-Fenton-like oxidation-coagulation precipitation was used to strengthen the pretreatment of the wastewater. Through orthogonal experiment, the parameters of multi-element micro-electrolysis, such as filling ratio, reaction time, pH and aeration rate were optimized, and the appropriate dosage of H₂O₂ in Fenton-like section was determined. The results showed that for the influent with COD ≤ 18 000 mg/L and conductivity ≤ 78 000 μS/cm, the removal rates of COD and SS were 62.6% and 65% respectively, after pretreatment under the optimized process conditions, which provided good influent water quality for subsequent biochemical treatment.

Key words: high concentration wastewater from pesticide production, multi-element micro-electrolysis, Fenton-like oxidation, coagulation sedimentation

中图分类号: 

• X703