This paper investigates the treatment of high-salinity fluoride-containing wastewater,aiming to provide a reference for practical industrial applications by perfecting the treatment process and optimizing key parameters through laboratory and pilot-scale experiments.The combined post-treatment process employs chemical precipitation,adsorption,high-pressure reverse osmosis,and evaporation.Fluoride in the wastewater is removed as calcium fluoride,effectively reducing fluoride content to below 1 mg/L.The excessive salt in the wastewater is concentrated and separated using a reverse osmosis system,with the salinity of the permeate consistently maintained below 1 000 mg/L.The reverse osmosis system allows for the recovery of 75％of the permeate for reuse.The feasibility and stability of the process and parameters were validated through pilot-scale tests.The results indicate that the optimized treatment process exhibits good stability and feasibility,meets national fluoride discharge standards,conserves water resources,complies with zero liquid discharge policies,and holds significant application value.
关键词
高盐含氟废水/化学沉淀/吸附/高压反渗透/工艺优化
Key words
high salinity fluoride-containing wastewater/chemical precipitation/adsorption/high-pressure reverse osmosis/process optimization
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