College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, PR China; Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, PR China.
Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, PR China.
Bioresour Technol. 2016 Aug;214:355-362. doi: 10.1016/j.biortech.2016.04.080. Epub 2016 Apr 19.
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.
膜疏水性预测膜污染失效需要更可靠的指标。本研究采用热力学方法，根据两种不同相互作用情景，研究了浸没式膜生物反应器（MBR）中膜酸碱（AB）性质对界面相互作用的影响。结果表明，MBR 中的聚偏氟乙烯（PVDF）膜和污染物样品均具有较高的电子供体（γ(-)）组分和较低的电子受体（γ(+)）组分。对于两种相互作用情景，AB 相互作用都是总相互作用的主要组成部分。结果表明，总相互作用随膜γ(-)单调下降，而受膜γ(+)的影响较小，表明γ(-)可以作为膜污染预测的可靠指标。本研究表明，为减轻污染而进行的膜改性应侧重于提高膜表面的γ(-)组分，而不是提高其亲水性。
