预涂层吸附-超滤处理再生水有机物效能及膜污染机制

发布时间：2018-04-06 21:22

本文选题：预沉积　切入点：铁酸锰　出处：《水处理技术》2017年05期

【摘要】：将铁酸锰(MnFe_2O_4)和四氧化三铁(Fe_3O_4)2种吸附剂预沉积在超滤膜上过滤再生水模拟溶液,考察预沉积对膜污染及其膜出水水质的影响。结果表明,2种吸附剂的适宜投加量均为0.45 g/L;在适宜投加量下,Fe_3O_4预沉积比单独超滤提高膜比通量20.1个百分点,效果优于提高膜比通量9.3个百分点的MnFe_2O_4;MnFe_2O_4预沉积和超滤膜的组合工艺有67.3%的TOC去除率,改善效果高于达到的41.1%的TOC去除率的Fe_3O_4;吸附剂预沉积在超滤膜上会形成预涂层,平滑致密的预涂层可吸附和截留污染物,有效减少膜污染,投加量0.45 g/L的Fe_3O_4形成的预涂层比投加量0.45 g/L的MnFe_2O_4更有效的阻止了膜污染。预沉积技术可以改善膜通量和膜出水水质。
[Abstract]:Manganese ferrate (MnFe2O4) and iron trioxide (Fe3O4) were predeposited on ultrafiltration membrane to filter the simulated solution of regenerated water. The effects of predeposition on membrane fouling and effluent quality were investigated.The results showed that the suitable dosage of the two adsorbents was 0.45 g / L, and the Fe3O _ 4 predeposition was 20.1% higher than that of ultrafiltration alone.The effect is better than that of MnFe2O4MnFe2O4 combined process of pre-deposition and ultrafiltration membrane, which is better than that of MnFe2O4MnFe2O4 by 9.3% of the specific flux of the membrane. The combined process of pre-deposition and ultrafiltration membrane has a 67.3% TOC removal rate, and the improvement effect is higher than the Fe3O4 removal rate of 41.1% TOC, and the pre-deposition of adsorbent on the ultrafiltration membrane will form a precoating.The smooth and compact precoating can adsorb and intercept pollutants and effectively reduce membrane fouling. The pre-coating formed by adding 0.45 g / L Fe_3O_4 is more effective than 0.45 g / L MnFe_2O_4 in preventing membrane fouling.Predeposition technology can improve membrane flux and membrane effluent quality.
【作者单位】：北京建筑大学城市雨水系统与水环境教育部重点试验室;北京建筑大学环境与能源工程学院;
【基金】：国家自然科学基金项目(51678027)
【分类号】：TQ028.8

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