摘要：

某有机氟化工园区污水处理厂废水中有机氟化物易被生化法氧化为无机氟化物而导致出水氟化物不稳定。为提高出水稳定性，并降低废水中有机氟化物的浓度，采用“Fenton氧化+高效沉淀池”工艺对该污水处理厂进行改造。小试结果表明，Fenton氧化法和臭氧氧化法对园区污水处理厂进水中有机氟化物均有一定的氧化效果，氟化物平均增加率为35.48%和46.79%；通过工程实践表明，Fenton氧化法+高效沉淀能够有效处理含有机氟化物废水，Fenton氧化后氟化物平均增加率为29.40%，两级高效沉淀池对氟化物的去除率分别为29.98%和17.97%，出水氟化物稳定低于4.5 mg/L，满足排放标准要求。工程污水处理经营成本增加1.95元/t。

关键词: Fenton氧化, 高效沉淀, 含氟废水, 有机氟化物

Abstract:

This study addressed the issue of unstable fluoride levels in the effluent caused by the susceptibility of the wastewater to biochemical oxidation in the sewage treatment plant of an organic fluorine chemical park. In order to enhance the stability of the effluent and to reduce the concentration of organic fluorine compounds in the wastewater. Fenton oxidation/efficient precipitation method was chosen to upgrade the sewage treatment plant. Preliminary trials indicated that the organic fluorine compounds in the influent of the sewage treatment plant could be oxidized by both Fenton oxidation and ozone oxidation methods, resulting in an average fluoride increase rates of 35.48% and 46.79%, respectively. Engineering practices demonstrated that wastewater containing organic fluorine compounds could be treated by the combination of Fenton oxidation/efficient precipitation method. After Fenton oxidation, the average increase rate of fluorides was 29.40%, and the two-stage efficient precipitation achieved fluoride removal rates of 29.98% and 17.97%, respectively. The concentration of fluoride in the treated effluent was less than 4.5 mg/L, to meet the requirements of the discharge standard. The operating cost of the sewage treatment increased by 1.95 yuan per ton of water.

Key words: Fenton oxidation, efficient precipitation, fluoride wastewater, organic fluoride

中图分类号: 

• X703