预涂层吸附-超滤处理再生水有机物效能及膜污染机制  

Organics Treatment Effect of Reclaimed Water by the Process of Precoating Adsorption-UF and Membrane Fouling Mechanism

作　　者：孙丽华[1] 贺宁[2] 田海龙[2] 段茜[2] SUN Lihua HE Ning TIAN Hailong DUAN Xi(Key Laboratory of Urban Stormwater System ＆ Water Environment, Beijing University of Civil Engineering and Architecture School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture： Beijing 100044, China)

机构地区：[1]北京建筑大学城市雨水系统与水环境教育部重点试验室 [2]北京建筑大学环境与能源工程学院,北京100044

出　　处：《水处理技术》2017年第5期26-29,共4页Technology of Water Treatment

基　　金：国家自然科学基金项目(51678027)

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。This paper used the combined process of two adsorbents pre-deposition （MnFe2O4 and Fe3O4） and ultrafiltration membrane to filter solution simulated reclaimed water. The effects ofpre-deposition on the membrane fouling and effluent quality by ultrafiltration membrane were investigated. The results showed that, the optimal dosage of two adsorbents was 0.45 g/L, the membrane specific flux was up to 20.1 percentage points by Fe3O4 predeposition from alone ultmfiltration, that was better than MnFe2O4 which improved membrane specific flux 9.3 percentage points. And the TOC removal rate of the combined process of MnFe2O4 pre-deposition and ultrafiltration could reach 67.3%, better than that of 41.1% of TOC removal rate by Fe3O4. The adsorbents could pre-deposited in membrane and formed a smooth and dense pre-coating which could adsorb and intercept pollutants, effectively reduce the membrane fouling, and pre-coating formed by 0.45 g/L Fe3O4 reduced membrane fouling more effectively than that of 0.45 g/L MnFe2O4. The pre-deposition is an efficient technology for the improvement of membrane flux and effluent quality.

关 键 词：预沉积 铁酸锰 四氧化三铁 超滤膜 膜比通量 膜污染 

分 类 号：TQ028.8[化学工程] X703.1[环境科学与工程—环境工程]