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Bioresour Technol. 2016 Aug;214:355-362. doi: 10.1016/j.biortech.2016.04.080. Epub 2016 Apr 19.

Influences of acid-base property of membrane on interfacial interactions related with membrane fouling in a membrane bioreactor based on thermodynamic assessment.

Author information

1
College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, PR China; Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, PR China.
2
Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, PR China.
3
College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, PR China.
4
College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, PR China. Electronic address: linhonjun@163.com.
5
Department of Chemical Engineering, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario P7B 5E1, Canada.
6
Environmental Science Research and Design Institute of Zhejiang Province, Hangzhou 310007, PR China.

Abstract

Failure of membrane hydrophobicity in predicting membrane fouling requires a more reliable indicator. In this study, influences of membrane acid base (AB) property on interfacial interactions in two different interaction scenarios in a submerged membrane bioreactor (MBR) were studied according to thermodynamic approaches. It was found that both the polyvinylidene fluoride (PVDF) membrane and foulant samples in the MBR had relatively high electron donor (γ(-)) component and low electron acceptor (γ(+)) component. For both of interaction scenarios, AB interaction was the major component of the total interaction. The results showed that, the total interaction monotonically decreased with membrane γ(-), while was marginally affected by membrane γ(+), suggesting that γ(-) could act as a reliable indicator for membrane fouling prediction. This study suggested that membrane modification for fouling mitigation should orient to improving membrane surface γ(-) component rather than hydrophilicity.

KEYWORDS:

Acid base interaction; Interaction energy; Membrane bioreactor; Membrane fouling; XDLVO theory

PMID:
27155263
DOI:
10.1016/j.biortech.2016.04.080
[Indexed for MEDLINE]

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