A novel insight into membrane fouling mechanism regarding gel layer filtration: Flory-Huggins based filtration mechanism

被引：33
|
作者：
Lei, Qian [1 ]
Zhang, Meijia [1 ]
Shen, Liguo [1 ]
Li, Renjie [1 ]
Liao, Bao-Qiang [2 ]
Lin, Hongjun [1 ]
机构：
[1] Zhejiang Normal Univ, Coll Geog & Environm Sci, Jinhua 321004, Peoples R China
[2] Lakehead Univ, Dept Chem Engn, 955 Oliver Rd, Thunder Bay, ON P7B 5E1, Canada
来源：
SCIENTIFIC REPORTS | 2016年 / 6卷
基金：
中国国家自然科学基金;
关键词：
OSMOTIC-PRESSURE MODEL; WASTE-WATER; BIOREACTOR MBR; SLUDGE CAKE; FLUX; ULTRAFILTRATION; THERMODYNAMICS; PERFORMANCE; BIOMASS;
D O I：
10.1038/srep33343
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
This study linked the chemical potential change to high specific filtration resistance (SFR) of gel layer, and then proposed a novel membrane fouling mechanism regarding gel layer filtration, namely, Flory-Huggins based filtration mechanism. A mathematical model for this mechanism was theoretically deduced. Agar was used as a model polymer for gel formation. Simulation of the mathematical model for agar gel showed that volume fraction of polymer and Flory-Huggins interaction parameter were the two key factors governing the gel SFR, whereas, pH and ionic strength were not related with the gel SFR. Filtration tests of gel layer showed that the total SFR value, effects of pH and ionic strength on the gel SFR well agreed with the perditions of model's simulation, indicating the real occurrence of this mechanism and the feasibility of the proposed model. This mechanism can satisfactorily explain the extremely high SFR of gel layer, and improve fundamental insights into membrane fouling regarding gel layer filtration.
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页数：9
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