Pretreatment for alleviation of RO membrane fouling in dyeing wastewater reclamation

被引:28
作者
Chen, Gen-Qiang [1 ,2 ]
Wu, Yin-Hu [1 ,2 ]
Tan, Yu-Jun [1 ,2 ]
Chen, Zhuo [1 ,2 ]
Tong, Xing [1 ,2 ]
Bai, Yuan [1 ,2 ]
Luo, Li-Wei [1 ,2 ]
Wang, Hao-Bin [1 ,2 ]
Xu, Yu-Qing [1 ,2 ]
Zhang, Zi-Wei [1 ,2 ]
Ikuno, Nozomu [3 ]
Hu, Hong-Ying [1 ,2 ,4 ]
机构
[1] Tsinghua Univ, Sch Environm, Environm Simulat & Pollut Control State Key Joint, State Environm Protect Key Lab Microorganism Appl, Beijing 100084, Peoples R China
[2] Beijing Lab Environm Frontier Technol, Beijing 100084, Peoples R China
[3] Kurita Water Ind Ltd, Nakano Ku, Tokyo 1640001, Japan
[4] Tsinghua Berkeley Shenzhen Inst, Shenzhen Environm Sci & New Energy Technol Engn L, Shenzhen 518055, Peoples R China
基金
中国国家自然科学基金;
关键词
Reverse osmosis; Membrane fouling; Dyeing wastewater; Activated carbon; Polyaluminum chloride; Polyferric sulfate; DISSOLVED ORGANIC-MATTER; EXTRACELLULAR POLYMERIC SUBSTANCES; POWDERED ACTIVATED CARBON; SOLUBLE MICROBIAL PRODUCTS; REVERSE-OSMOSIS; COAGULATION-FLOCCULATION; MOLECULAR-WEIGHT; REMOVAL; ADSORPTION; REUSE;
D O I
10.1016/j.chemosphere.2021.133471
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Adsorption and coagulation were commonly used to alleviate reverse osmosis (RO) membrane fouling caused by dissolved organic matters (DOM), but the effects of changed composition and structure of DOM in dyeing wastewater after adsorption and coagulation on RO membrane fouling have seldom been studied. This study aimed at resolving the mechanism how the RO membrane fouling during dyeing wastewater treatment was alleviated by using adsorption and coagulation. The dyeing wastewater caused serious RO membrane fouling. Pretreatment with granular activated carbon (GAC), polyferric sulfate (PFS) and polyaluminum chloride (PACl) were conducted. It was shown that GAC could remove most of the DOM (95%) and preferred to adsorb protein, hydrophobic neutrals and fluorescent compounds. Both coagulants of PFS and PACl preferred to remove polysaccharides (the removal rate was 9-19% higher than that of DOM), high-MW compounds and these compounds with high fouling potential. Afterwards, the RO membrane fouling potential of the dyeing wastewater was tested. The GAC and PFS performed well to alleviate fouling. After GAC treatment, the decline rate of RO flux was similar to that of raw wastewater after 6-fold dilution. With pretreatment by PFS or PACl, the fouling potential of dyeing wastewater was much lower than that of raw wastewater after diluted to the same DOM content. Changes in polysaccharides content in the DOM had more effects on RO membrane fouling than that of proteins after
引用
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页数:11
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