Title of article
Effects of ionic strength on membrane fouling in a membrane bioreactor
Author/Authors
Wang، نويسنده , , Fangyuan and Zhang، نويسنده , , Meijia and Peng، نويسنده , , Wei and He، نويسنده , , Yiming and Lin، نويسنده , , Hongjun and Chen، نويسنده , , Jianrong and Hong، نويسنده , , Huachang and Wang، نويسنده , , Aijun and Yu، نويسنده , , Haiying، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2014
Pages
7
From page
35
To page
41
Abstract
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.
Keywords
energy barrier , Membrane bioreactor , Critical ionic strength , Membrane fouling
Journal title
Bioresource Technology
Serial Year
2014
Journal title
Bioresource Technology
Record number
1935605
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