Study of DOM removal in surface water by forward osmosis
WEI Yong1, WU Hong1, LI Tian2, LUO Zheng-bo1, LI Xian-jian1, WEI Qin-zheng1
1. School of Environment and Safety Engineering & School of Urban Construction, Changzhou University, Changzhou 213164, China; 2. College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Abstract：Forward osmosis (FO) filtration was carried out with influent from Ge Lake after sand filtration, and draw solution of sodium chloride. Different factors influencing FO performance were examined and the cleaning process of the fouled membrane was also conducted to investigate the reversibility of the FO membrane fouling. The results showed that increasing the concentration of the draw solution or the operation temperature and membrane surface velocity could enhance the permeate flux. In addition, the FO could effectively remove the main four types of dissolved organic matters (DOM) in Ge Lake, i.e. the soluble microbial metabolites, tryptophan-like substances, fulvic acids and humic acids, with DOC and UV254removal ratios both above 96%. Furthermore, the membrane cleaning performance exhibited that the flux of the fouled membrane in a short-term filtration can be almost fully recovered with just hydraulic washing, while that in a long-term filtration couldn’t be generally recovered with hydraulic washing, but with ultrasonic cleaning. Finally, the membrane elution was analyzed and it was found that the tryptophan-like substances and fulvic acids were key membrane fouling contributors.
魏永, 吴宏, 李甜, 罗政博, 李贤建, 魏勤政. 正渗透去除地表水中DOM的效能研究[J]. 中国环境科学, 2022, 42(7): 3204-3211.
WEI Yong, WU Hong, LI Tian, LUO Zheng-bo, LI Xian-jian, WEI Qin-zheng. Study of DOM removal in surface water by forward osmosis. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(7): 3204-3211.
何帅兵.地表水溶解性有机物的去除方法研究[D].杨凌:西北农林科技大学, 2016. He S. The methods of removal DOM in surface water[D]. Yangling, Northwest A&F University, 2016.
[2]
Roy D, Rahni M, Pierre P, et al. Forward osmosis for the concentration and reuse of process saline wastewater[J]. Chem. Eng. J. 2016,287:277-284.
[3]
王美玲,王策,李咏梅.利用水通道蛋白正渗透膜浓缩生活污水[J].中国环境科学, 2020,40(1):269-279. Wang M, Wang C, Li Y. Concentrating domestic sewage using aquaporin biomimetic forward osmosis membrane[J]. China Environmental Science, 2020,40(1):269-279.
[4]
李志浩.水体溶解性有机物正向渗透去除特性研究[D].济南:山东建筑大学, 2020. Li Z. Study on removal of dissolved organic matter in water by forward osmosis[D]. Jinan, Shandong Jianzhu University, 2020.
[5]
Tang C Y, She Q, Lay W C L, et al. Coupled effects of internal concentration polarization and fouling on flux behavior of forward osmosis membranes during humic acid filtration[J]. J. Membrane Sci., 2010,354(1):123-133.
[6]
夏圣骥,周昱旻,陈建伟,等.正渗透膜有机污染的实验研究[J].水处理技术, 2014,40(3):27-31,35. Xia S, Zhou Y, Chen J, et al. Organic fouling of forward osmosis membrane by selected organic fractions[J]. Technology of Water Treatment, 2014,40(3):27-31,35.
[7]
Nguyen T T, Lee C, Field R W, et al. Insight into organic fouling behavior in polyamide thin-film composite forward osmosis membrane:Critical flux and its impact on the economics of water reclamation[J]. J. Membrane Sci., 2020,606:118118.
[8]
Mi B, Elimelech M. Chemical and physical aspects of organic fouling of forward osmosis membranes[J]. J. Membrane Sci., 2008,320(1):292-302.
[9]
Kim Y, Li S, Ghaffour N. Evaluation of different cleaning strategies for different types of forward osmosis membrane fouling and scaling[J]. J Membrane. Sci., 2020,596:117731.
[10]
McCutcheon J R, McGinnis R L, Elimelech M. Desalination by ammonia-carbon dioxide forward osmosis:Influence of draw and feed solution concentrations on process performance[J]. J. Membrane Sci., 2006,278(1/2):114-123.
[11]
Duc Viet N, Im S, Jang A. Characterization and control of membrane fouling during dewatering of activated sludge using a thin film composite forward osmosis membrane[J]. J. Hazard. Mater., 2020, 396:122736.
[12]
Li C, Li H, Yang Y, et al. Removal of pharmaceuticals by fouled forward osmosis membranes:Impact of DOM fractions, Ca2+ and real water[J]. Sci. Total Environ., 2020,738:139757.
[13]
王美玲,王策,李咏梅.初始pH值对正渗透浓缩城市污水和回收磷的影响[J].中国环境科学, 2021,41(2):660-668. Wang M, Wang C, Li Y. Effects of the initial pH on the process of forward osmosis for centration of municipal sewage and phosphorus recovery[J]. China Environmental Science, 2021,41(2):660-668.
[14]
Chen W, Westerhoff P, Leenheer J A, et al. Fluorescence excitation-emission matrix regional integration to quantify spectra for dissolved organic matter[J]. Environ. Sci. Technol., 2003,37(24).
[15]
Zhan M, Gwak G, Kim D I, et al. Quantitative analysis of the irreversible membrane fouling of forward osmosis during wastewater reclamation:Correlation with the modified fouling index[J]. J. Membrane Sci., 2020,597:117757.
[16]
严晓菊.光催化-膜组合工艺去除腐殖酸的效能与机理研究[D].哈尔滨工业大学, 2009. Yan X. Research on the performance and the mechanism of humic acid removal by the photocatalysis-membrane integrated process[D]. Harbin:Harbin Institute of Technology, 2009.
[17]
Edzwald J K, Tobiason J E. Enhanced Coagulation:US Requirements and a Broader View[J]. Water Sci. Technol., 1999,40(9):63-70.
[18]
杨诗慧.正渗透-反渗透组合工艺处理城市污水的研究[D].济南:山东大学, 2019. Yang S. Study of forward osmosis-reverse osmosis process for municipal wastewater treatment[D]. Jinan:Shandong University, 2019.
[19]
Sun Y, Tian J, Zhao Z, et al. Membrane fouling of forward osmosis (FO) membrane for municipal wastewater treatment:A comparison between direct FO and OMBR[J]. Water Res., 2016,104:330-339.
[20]
Wang Z P, Zhang T. Characterization of soluble microbial products (SMP) under stressful conditions[J]. Water Res., 2010,44(18):5499-5509.
[21]
Xie M, Nghiem L D, Price W E, et al. Impact of humic acid fouling on membrane performance and transport of pharmaceutically active compounds in forward osmosis[J]. Water Res., 2013,47(13):4567-4575.
