粉末活性炭-超滤膜组合工艺处理二级出水的膜污染特性
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摘要
采用粉末活性炭(PAC)-超滤膜(UF)组合工艺对某城市二级出水进行深度处理,研究了不同PAC投加量下组合工艺的膜渗透性能,并对其膜污染性能进行分析。研究结果发现:在最佳膜通量投加量下(PAC为10 mg/L),膜通量和不可逆膜污染阻力达到最低值;组合工艺对不同分子量的去处效果较直接超滤都有所提高,其中小分子量(3k～10 k Da和<3kDa)有机物的去除率提高最大;组合工艺以滤饼层和中间堵塞模型为主,而发生完全堵塞模型的概率相对较小。投加PAC能够有效提高去除效果,降低膜污染。
The secondary effluent of a city was treated by the combined process of powdered activated carbon and ultrafiltration( PAC-UF). The membrane permeability performance of the combined process under different dosage of PAC was studied,and its membrane fouling performance was analyzed. The results showed that membrane flux and irreversible membrane fouling resistance reached the lowest value under the optimum membrane flux dosage( PAC 10 mg/L). The combined process had better effect on the different molecular weight than direct ultrafiltration. And the removal efficiency of organic matters with low molecular weight( 3 ～ 10 kDa and < 3 k Da) was the highest. The combined process mainly based on cake layer and middle plugging model. And the probability of completely plugging model was relatively small. Adding PAC can effectively improve the removal effect and reduce membrane fouling.
The secondary effluent of a city was treated by the combined process of powdered activated carbon and ultrafiltration( PAC-UF). The membrane permeability performance of the combined process under different dosage of PAC was studied,and its membrane fouling performance was analyzed. The results showed that membrane flux and irreversible membrane fouling resistance reached the lowest value under the optimum membrane flux dosage( PAC 10 mg/L). The combined process had better effect on the different molecular weight than direct ultrafiltration. And the removal efficiency of organic matters with low molecular weight( 3 ～ 10 kDa and < 3 k Da) was the highest. The combined process mainly based on cake layer and middle plugging model. And the probability of completely plugging model was relatively small. Adding PAC can effectively improve the removal effect and reduce membrane fouling.
引文
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13 陈国强,王剑.粉末活性炭投加量对原水中有机物的去除及其分子量分布的影响[J].净水技术,2017,36(增刊1):45-49Chen Guoqiang,Wang Jian. Effect of PAC dosage on removal of organic matter and molecular weight distribution in raw water[J]. Water Purification Technology,2017,36(S1):45-49
14 王旭东,刘佩,王磊,等.城市污水二级出水中溶解性有机物特性分析[J].环境工程学报,2014,8(6):2186-2190Wang Xudong,Liu Pei,Wang Lei,et al. Analysis characteristics of dissolved organic matters in the secondary effluent of municipal wastewater[J]. Chinese Journal of Environmental Engineering,2014,8(6):2186-2190
2 吴蕾,张征世.城市再生水处理工艺[J].绿色科技,2016(10):47-48Wu Lei,Zhang Zhengshi. Urban reclaimed water treatment process[J]. Journal of Green Science and Technology,2016(10):47-48
3 任海静,石春力,卢珊,等.水资源再次开发———超滤膜在市政污水处理中的应用[J].建设科技,2015,292(13):26-28Ren Haijing,Shi Chunli,Lu Shan,et al. Re-development of water resources—application of ultrafiltration membrane in municipal wastewater treatment[J]. Building Technology,2015,292(13):26-28
4 张瑛洁,岳显,朱云峰,等.超滤直接过滤微污染水的膜污染清洗研究[J].东北电力大学学报,2013,33(4):6-10Zhang Yingjie,Yue Xian,Zhu Yunfeng,et al. Study on cleaning of ultra-filtering membrane fouling caused by direct ultra-filtrating of micro-polluted water[J]. Journal of Northeast Dianli University,2013,33(4):6-10
5 王小波.生物预处理/超滤组合工艺处理华南山区水库水研究[D].哈尔滨:哈尔滨工业大学,2017Wang Xiaobo. Research on biological pretreatment coupled with ultrafiltration process for purification of south China reservoir water[D].Harbin:Harbin Institute of Technology,2017
6 Jermann D,Pronk W,Meylan S,et al. Interplay of different NOM fouling mechanisms during ultrafiltration for drinking water production[J]. Water Research,2007,41(8):1713-1722
7 Hermia J. Constant pressure blocking filtration law application to powder-law non-Newtonian fluid[J]. Institution of Chemical Engineers. Transactions,1982,60(3):183-187
8 Lim A. L,Bai R B. Membrane fouling and cleaning in microfiltration of activated sludge wastewater[J]. Journal of Membrane Science,2003,216(1):279-290
9 Mohammadi T,Kazemimoghadam M,Saadabadi M. Modeling of membrane fouling and flux decline in reverse osmosis during separation of oil in water emulsions[J]. Desalination,2003,157(1):369-375
10 Bowen W,Calvo J,Hernandez A. Steps of membrane blocking in flux decline during protein microfiltration[J]. Journal of Membrane Science,1995,101(1):153-165
11 王雅琴,吕伟娅,谭德君,等.投加活性炭膜污染控制的研究[J].给水排水,2007,33(增刊1):131-134Wang Yaqin,LüWeiya,Tan Dejun,et al. Study on membrane fouling control with activated carbon[J]. Water&Wastewater Engineering,2007,33(S1):131-134
12 Tomaszewska M,Mozia S. Removal of organic matter from water by PAC/UF system[J]. Water Research,2002,36(16):4137-4143
13 陈国强,王剑.粉末活性炭投加量对原水中有机物的去除及其分子量分布的影响[J].净水技术,2017,36(增刊1):45-49Chen Guoqiang,Wang Jian. Effect of PAC dosage on removal of organic matter and molecular weight distribution in raw water[J]. Water Purification Technology,2017,36(S1):45-49
14 王旭东,刘佩,王磊,等.城市污水二级出水中溶解性有机物特性分析[J].环境工程学报,2014,8(6):2186-2190Wang Xudong,Liu Pei,Wang Lei,et al. Analysis characteristics of dissolved organic matters in the secondary effluent of municipal wastewater[J]. Chinese Journal of Environmental Engineering,2014,8(6):2186-2190