预涂动态膜对超滤膜处理海水中有机物的影响
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摘要
分别以硅藻土和粉末活性炭为涂膜材料,系统考察了预涂动态膜对海水溶解性有机物的去除效果及作用机理,以及对超滤膜通量的影响。试验结果表明,预涂动态膜能提高超滤膜对UV254和DOC的去除率,硅藻土对蛋白类有机物有强化去除作用,粉末活性炭对蛋白类和腐殖类有机物有较强的去除效果。与超滤膜相比,硅藻土预涂动态膜、粉末活性炭预涂动态膜的膜通量分别增加了21.6%、46.0%,反冲洗后膜通量恢复率分别为88.6%、87.2%。
Using diatomite and powdered activated carbon as precoating materials respectively,the influences of precoated dynamic membrane on the removing effect and action mechanism of seawater soluble organic matter,as well as the influence on ultrafiltration flux, have been investigated systematically. The experimental results show that precoated dynamic membrane can improve the removing rates of UV254 and DOC. Diatomite has enhanced removing effect on protein organic matter, and powdered activated carbon has comparatively strong removing effect on protein organic matter and humic acids organic matter. Compared with ultrafiltration membrane,the membrane flux of diatomite precoated dynamic membrane and powdered activated carbon precoated dynamic membrane are increased by21.6% and 46.0%,respectively. After backwashing,the recovery rates of membrane flux are 88.6% and 87.2%, respectively.
Using diatomite and powdered activated carbon as precoating materials respectively,the influences of precoated dynamic membrane on the removing effect and action mechanism of seawater soluble organic matter,as well as the influence on ultrafiltration flux, have been investigated systematically. The experimental results show that precoated dynamic membrane can improve the removing rates of UV254 and DOC. Diatomite has enhanced removing effect on protein organic matter, and powdered activated carbon has comparatively strong removing effect on protein organic matter and humic acids organic matter. Compared with ultrafiltration membrane,the membrane flux of diatomite precoated dynamic membrane and powdered activated carbon precoated dynamic membrane are increased by21.6% and 46.0%,respectively. After backwashing,the recovery rates of membrane flux are 88.6% and 87.2%, respectively.
引文
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[11]李欣珏,钱飞跃,李暮,等.活性炭吸附对印染废水生化出水中不同种类有机物的去除效果[J].环境化学,2009,28(3):369-372.
[12]王文华,赵瑾,马宇辉,等.预涂动态膜强化超滤去除海水中有机物及其对膜污染的影响[J].环境科学学报,2017,37(4):1349-1357.
[13]王文华,赵瑾,姜天翔,等.投加粉末活性炭对超滤膜去除海水中有机物的影响[J].化工进展,2016,35(9):2967-2972.
[14]刘铮,董秉直,陈艳,等.三维荧光光谱表征膜污染物[J].环境化学,2010,29(3):496-501.
[15]Zhu Hongtao,Wen Xianghua,Huang Xia.Membrane organic fouling and the effect of pre-ozonation in microfiltration of secondary effluent organic matter[J].Journal of Membrane Science,2010,352(1):213-221.
[16]王文华,赵瑾,姜天翔,等.硅藻土预涂动态膜对海水中有机物的截留及膜污染特性[J].环境工程学报,2017,11(7):3936-3942.
[2]Edzwald J K,Haarhoff J.Seawater pretreatment for reverse osmosis:Chemistry,contaminants,and coagulation[J].Water Research,2011,45(17):5428-5440.
[3]Guilbaud J,MasséA,Wolff F C,et al.Seawater pretreatment by deadend micro and ultrafiltration in pressure-driven inside feed[J].Desalination and Water Treatment,2013,51(1/2/3):416-422.
[4]Kim S J,Kim J O,Kim W S,et al.Use of a two-step ultrafiltration procedure to concentrate viral hemorrhagic septicemia virus(VHSV)in seawater[J].Journal of Virological Methods,2015,224:30-34.
[5]MasséA,Thi H N,Roelens G,et al.Seawater ultrafiltration:role of particles on organic rejections and permeate fluxes[J].Environmental Technology Letters,2013,34(17):2553-2561.
[6]Peiris R H,Cynthia Hallé,Budman H,et al.Identifying fouling events in a membrane-based drinking water treatment process using principal component analysis of fluorescence excitation-emission matrices[J].Water Research,2010,44(1):185-194.
[7]Teychene B,Collet G,Gallard H.Modeling of combined particles and natural organic matter fouling of ultrafiltration membrane[J].Journal of Membrane Science,2016,505:185-193.
[8]Huang H,Lee N H,Young T,et al.Natural organic matter fouling of low-pressure,hollow-fiber membranes:Effects of NOM source and hydrodynamic conditions[J].Water Research,2007,41(17):3823-3832.
[9]Yang Tao,Qiao Bo,Li Guochao,et al.Improving performance of dynamic membrane assisted by electrocoagulation for treatment of oily wastewater:Effect of electrolytic conditions[J].Desalination,2015,363:134-143.
[10]Ma Jinxing,Wang Zhiwei,Xu Yinlun,et al.Organic matter recovery from municipal wastewater by using dynamic membrane separation process[J].Chemical Engineering Journal,2013,219(3):190-199.
[11]李欣珏,钱飞跃,李暮,等.活性炭吸附对印染废水生化出水中不同种类有机物的去除效果[J].环境化学,2009,28(3):369-372.
[12]王文华,赵瑾,马宇辉,等.预涂动态膜强化超滤去除海水中有机物及其对膜污染的影响[J].环境科学学报,2017,37(4):1349-1357.
[13]王文华,赵瑾,姜天翔,等.投加粉末活性炭对超滤膜去除海水中有机物的影响[J].化工进展,2016,35(9):2967-2972.
[14]刘铮,董秉直,陈艳,等.三维荧光光谱表征膜污染物[J].环境化学,2010,29(3):496-501.
[15]Zhu Hongtao,Wen Xianghua,Huang Xia.Membrane organic fouling and the effect of pre-ozonation in microfiltration of secondary effluent organic matter[J].Journal of Membrane Science,2010,352(1):213-221.
[16]王文华,赵瑾,姜天翔,等.硅藻土预涂动态膜对海水中有机物的截留及膜污染特性[J].环境工程学报,2017,11(7):3936-3942.