Abstract
Classification treatment was applied for the fluorine-containing membrane material production wastewater, which was low biodegradability with high concentration of fluoride and salinity. Salinity wastewater was collected and pretreated by three-effect evaporation and ozone oxidation for desalting and improving the biodegradability, then mixed with other production wastewater with low concentration. Mixed wastewater was treated by hydrolysis acidification, AO biological treatment and modified Fenton treatment process. The operation results of stable operation showed that when the influent concentrations of COD, NH3-N, fluoride, TN and TP were 5000mg/L, 50mg/L, 5000mg/L, 60mg/and 1mg/L, the effluent mean concentrations were 32mg/L, 1.2mg/L, 1.1mg/L, 13.5mg/L and 0.12mg/L, which could meet the discharge standards.
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