[目的]针对光催化处理有机磷农药废水工艺中,有机磷降解生成无机磷,无机磷会导致水体富营养化以及催化剂分离难问题,将陶瓷膜微滤与光催化相结合采处理有机磷农药废水.[方法]将膜微滤过程引进光催化降解有机磷废水处理工艺中,通过膜的截留特性回收催化剂、降低PO含量,同时对微滤过程的操作参数进行了优化.[结果]微滤促进了除磷效果,消除了二次污染,改善了出水水质,有利于催化剂的分离回收.光催化和微滤处理有机磷废水,PO去除率达99.1%.COD,去除率达91.8%,远高于单独光催化或单独微滤的结果.当操作压差为0.10MPa,流速为5 m/s,膜通量达230L/(m·h).[结论]采用光催化-微滤组合工艺处理有机磷农药废水是一个行之有效的方法.%[ Objective ] The method of ceramic membrane microfiltration combined with photo-catalytsis was experimented in the treatment of the wastewater containing organic phosphorus pesticide because the inorganic phosphorus, which was produced from the treatment of the wastewater containing organic phosphorus pesticide with photo-catalytic degradation method, resulted in the eutrophication of water-body and the difficulty decomposition of catalyst. [ Method] The procedure of micro-filtration was introduced into the degradation of the wastewater with organic phosphorus pesticide, which was treated with photo-catalytic method and the catalyst could be recovered by micro-filter and the content of PO4 3- was reduced, and meanwhile, the operation parameters were optimized in the procedure of the micro-filtration. [ Result ] The method of micro-filtration promoted the removal efficiency of phosphorus, improved the water quality without the secondary contamination and was benefieial to the isolation and recovery of catalyst. The treating result of wastewater by means of the combination of photoeatalysis and micro-filtration showed that the removal rate of PO43- and COD was 99.1％ and 91.8％, respectively, which was much higher than that from single use of photocatalysis or micro-filtration. The flux was 230 I/( m2 · h) at trans-membrane pressure of 0.10 MPa and the cross-flow velocity of 5 m/s. [ Conclusion ] It was feasible and effective measure to treat the wastewater with organic phosphorus pesticide by means of the photo-catalytic method combined with micro-filtration.
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