Effects of ionic strength on membrane fouling in a membrane bioreactor

被引：35

作者：

Wang, Fangyuan ^{[1
]}

Zhang, Meijia ^{[1
]}

Peng, Wei ^{[1
]}

He, Yiming ^{[2
]}

Lin, Hongjun ^{[1
]}

Chen, Jianrong ^{[1
]}

Hong, Huachang ^{[1
]}

Wang, Aijun ^{[1
]}

Yu, Haiying ^{[1
]}

机构：

[1] Zhejiang Normal Univ, Coll Geog & Environm Sci, Jinhua 321004, Peoples R China

[2] Zhejiang Normal Univ, Dept Mat Phys, Jinhua 321004, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2014年 / 156卷

基金：

中国国家自然科学基金;

关键词：

Membrane fouling; Membrane bioreactor; Critical ionic strength; Energy barrier; WASTE-WATER TREATMENT; OSMOTIC-PRESSURE; PERMEATE FLUX; PERFORMANCE; FILTRATION; DECLINE; CAKE;

D O I：

10.1016/j.biortech.2014.01.014

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

In this study, the effects of ionic strength on membrane fouling in a membrane bioreactor (MBR) were investigated. Ionic strength in range of 0.005-0.05 mol/L exerted no apparent impacts on the resistance of virgin membrane, fouled membrane and pore clogging. Thermodynamic analysis showed existences of a secondary energy minimum and an energy barrier in the process of the sludge flocs approaching to membrane surface. Increase in ionic strength could significantly reduce the energy barrier. It was revealed that there existed a critical ionic strength above that the energy barrier would disappear, facilitating adhesion of the foulants. Cake resistance was not significantly affected by the ionic strength, but highly depended on SMP in supernatant. The high cake resistance caused by SMP could be explained by the osmotic pressure mechanism. The obtained results provided new insights into membrane fouling in MBRs. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：35 / 41

页数：7

共 34 条

[1]

[Anonymous], 2005, Standard methods for the examination of water and waste- water

[2] Nutrient removal in an A2O-MBR reactor with sludge reduction [J].

Banu, J. Rajesh ;

Uan, Do Khac ;

Yeom, Ick-Tae .

BIORESOURCE TECHNOLOGY, 2009, 100 (16) :3820-3824

[3] Effective negative surface tension: A property of coated nanoaerosols relevant to the atmosphere [J].

Chakraborty, Purnendu ;

Zachariah, Michael R. .

JOURNAL OF PHYSICAL CHEMISTRY A, 2007, 111 (25) :5459-5464

[4] STEADY-STATE PERMEATE FLUX OF CROSS-FLOW MICROFILTRATION [J].

CHANG, DJ ;

HSU, FC ;

HWANG, SJ .

JOURNAL OF MEMBRANE SCIENCE, 1995, 98 (1-2) :97-106

[5] Osmotic pressure effect on membrane fouling in a submerged anaerobic membrane bioreactor and its experimental verification [J].

Chen, Jianrong ;

Zhang, Meijia ;

Wang, Aijun ;

Lin, Hongjun ;

Hong, Huachang ;

Lu, Xiaofeng .

BIORESOURCE TECHNOLOGY, 2012, 125 :97-101

[6] Charge effects on inorganic membrane performance in a cross-flow microfiltration process [J].

Elzo, D ;

Huisman, I ;

Middelink, E ;

Gekas, V .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 1998, 138 (2-3) :145-159

[7] Effect of interparticle electrostatic double layer interactions on permeate flux decline in crossflow membrane filtration of colloidal suspensions: An experimental investigation [J].

Faibish, RS ;

Elimelech, M ;

Cohen, Y .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1998, 204 (01) :77-86

[8] Adsorption and fouling characterization of Klebsiella oxytoca to microfiltration membranes [J].

Feng, Lei ;

Li, Xiufen ;

Du, Guocheng ;

Chen, Jian .

PROCESS BIOCHEMISTRY, 2009, 44 (11) :1289-1292

[9] Extended DLVO interactions between spherical particles and rough surfaces [J].

Hoek, EMV ;

Agarwal, GK .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2006, 298 (01) :50-58

[10] Thermodynamic analysis of membrane fouling in a submerged membrane bioreactor and its implications [J].

Hong, Huachang ;

Peng, Wei ;

Zhang, Meijia ;

Chen, Jianrong ;

He, Yiming ;

Wang, Fangyuan ;

Weng, Xuexiang ;

Yu, Haiying ;

Lin, Hongjun .

BIORESOURCE TECHNOLOGY, 2013, 146 :7-14

← 1 2 3 4 →