工业园含氟废水/综合废水分步治理工程设计

Design of a Stepwise Project for the Treatment of Fluorine Containing Wastewater/Comprehensive Wastewater in an Industrial Park

针对绵阳市高端制造产业集中发展区废水含氟浓度高,有机物难以降解,氮、磷、SS处理要求较高的特点,吴家工业污水处理厂预先采用异核结晶混凝沉淀/吸附/离子交换组合工艺单独处理含氟废水,然后与其他废水合并一起采用水解酸化/多级多段AO/高效沉淀/深床滤池/臭氧接触工艺处理。分步进行针对性处理,可节省运行费用,且工艺布置合理、技术先进、集约化程度高。本项目设计规模为4×10^(4)m^(3)/d,当综合废水实际处理量平均值为35 520 m^(3)/d时,出水污染物指标浓度优于排放标准。本工程直接运行成本为4.2元/m^(3)。

The wastewater from Mianyang high-end manufacturing industry concentrated development area contains high concentration of fluorine and refractory organic matter, and there are high requirements for nitrogen, phosphorus and SS treatment. In Wujia industrial wastewater treatment plant, a combined process consisting of heteronuclear crystallization coagulation precipitation, adsorption and ion exchange was employed to treat the fluorine containing wastewater separately, and then combined with other wastewater to be treated by a process consisting of hydrolytic acidification, multi-stage A/O, high efficiency precipitation, deep bed filter and ozone contact reactor. The stepwise treatment of different wastewater saved the operating cost, optimized the process layout, with advanced technology and high degree of intensification. The design scale of the project is 4×10^(4)m^(3)/d. When the actual average treatment scale of the comprehensive wastewater was 35 520 m^(3)/d, the pollutant concentration in the effluent was lower than the discharge standard. The direct operating cost of the project is 4.2 yuan/m^(3).