Zero-discharge treatment method for fluorinated wastewater

The invention provides a zero-discharge treatment method for fluorinated wastewater. The method comprises the steps: firstly, subjecting defluorinating pretreated wastewater to a calcium removing reaction; enabling water obtained after the calcium removing reaction to enter a filtering system for filtering; and subjecting the filtered water to treatment sequentially by a soft water resin column, adefluorinating resin column, a secure filter and a reverse osmosis membrane assembly, wherein effluent of a pure water side of a reverse osmosis membrane can be recycled. The content of fluoride ionsin the fluorinated wastewater treated by the method provided by the invention is lower than 2ppm and reaches strict ground reference requirements. According to the method, the service life of the reverse osmosis membrane assembly can be further prolonged. 本发明提出了一种含氟废水零排放处理方法，包括：经过除氟预处理后的废水，先进行除钙反应；所述除钙反应后的水体进入过滤系统进行过滤；上述过滤后的水体依次经过软水树脂塔、脱氟树脂塔、保安过滤器和反渗透膜组处理，其中所述反渗透膜的纯水侧出水能够再利用。经过本发明方法处理后的含氟废水其氟离子含量小于2ppm，达到严格的地标要求。该方法还可以延长反