Effect of membrane pore size, coagulation time, and coagulant dose on virus removal by a coagulation-ceramic microfiltration hybrid system
Effect of membrane pore size, coagulation time, and coagulant dose on virus removal by a coagulation-ceramic microfiltration hybrid system
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DOI：
10.1016/j.desal.2004.11.026
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发表时间：
2005-07-10
期刊：
影响因子：
9.9
通讯作者：
Kato, Y
中科院分区：
文献类型：
--
作者：
Matsushita, T;Matsui, Y;Kato, Y
研究了在线混凝-陶瓷微滤复合系统去除河水中的病毒，考察了(1)混凝剂投加量(0.54、1.08和1.62 mg Al/L)、(2)膜孔径(0.1、0.5和1.0um m)和(3)混凝时间(1.1、2.4和60 S)对去除病毒的影响。我们发现(1)凝固剂的剂量对病毒的去除有很大的影响。当投加量为1.62mgAl/L PACl时，脱毒率为7.4log，而0.54mgAl/L时，脱毒率仅为2.8mg.因此，投药量越大，脱毒效果越好。(2)膜的孔径大小对病毒的去除也有一定的影响，0.5和1.0微米孔径的微滤膜对病毒的去除效果比0.1微米的微滤膜要小。(3)混凝时间对病毒去除影响不大：混凝时间越长，病毒水平下降幅度越大，但影响不大。总体而言，在微滤之前采用在线混凝的组合可以比传统处理厂的混凝时间短得多：在混合系统中投加至少1.08mgAl/L PAC1，混凝时间仅为2.4S。
We studied virus removal from spiked river water by an in-line coagulation-ceramic microfiltration hybrid system to investigate the effects of (1) coagulant dose (0.54,1.08, and 1.62 mg Al/L), (2) pore size of the MF membrane (0.1, 0.5, and 1.0 mu m), and (3) coagulation time (1.1, 2.4, and 60 s). We found that (1) coagulant dose strongly affected virus removal. Whereas 7.4 log removal was achieved with 1.62 mg Al/L PACl dosing, only 2.8 log removal was observed with 0.54 mg Al/L; thus, the larger the coagulant dose, the greater the virus removal. (2) Pore size of the MF membrane also affected virus removal: pore sizes of 0.5 and 1.0 mu m showed about I log less removal than the 0.1-mu m pore-size MF membrane. (3) Coagulation time slightly affected virus removal: the longer the coagulation time, the greater the reduction in virus level, but the effect was not large. Overall, the combination of in-line coagulation prior to microfiltration enables much shorter coagulation times than in conventional treatment plants: dosing with at least 1.08 mg Al/L PACl in the hybrid system allowed the coagulation time to be only 2.4 s.