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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。
The ferric manganese ferric oxide (MnFe 2 O 4) and ferric oxide (Fe 3 O 4) adsorbents were pre-deposited on the ultrafiltration membrane to filter the reclaimed water simulated solution to investigate the effect of pre-deposition on membrane fouling and membrane effluent quality. The results showed that the appropriate dosage of the two adsorbents was 0.45 g / L. Under the proper dosage, the pretreatment of Fe_3O_4 was 20.1% higher than that of single ultrafiltration, which was better than the increase of membrane specific flux 9.3% of the combination of MnFe 2 O 4; MnFe 2 O 4 pre-deposition and ultrafiltration membrane technology have a 67.3% TOC removal rate improvement effect is higher than the achieved 41.1% TOC removal rate of Fe 3 O 4; pre-deposition of adsorbent on the ultrafiltration membrane will form The pre-coating and the smooth and dense pre-coating can adsorb and retain pollutants and effectively reduce the membrane fouling. The pre-coating layer prepared with 0.45 g / L Fe_3O_4 is more effective than the MnFe_2O_4 with 0.45 g / L dosage Membrane fouling. Pre-deposition technology can improve membrane flux and membrane effluent quality.