Modeling and mitigating fouling of microfiltration membranes for microalgae dewatering

被引：8

作者：

Deng, Erda ^{[1
]}

Chen, Xiaoyi ^{[1
]}

Rub, Darius ^{[1
]}

Lin, Haiqing ^{[1
]}

机构：

[1] SUNY Univ Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA

来源：

SEPARATION AND PURIFICATION TECHNOLOGY | 2023年 / 315卷

关键词：

MF membranes; Algae dewatering; Zwitterions; Antifouling; Hermia model; Gel layer model; POLYDOPAMINE DEPOSITION CONDITIONS; ULTRAFILTRATION MEMBRANES; SURFACE MODIFICATION; PORE-SIZE; WATER; FLUX; PERMEABILITY; FILTRATION; MECHANISMS;

D O I：

10.1016/j.seppur.2023.123707

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Dewatering is energy-intensive for microalgae production, and microfiltration (MF) membranes are attractive because of their high energy efficiency. However, the membranes suffer from fouling by organic matter in the algae solutions, and there needs fundamental understanding of membrane fouling with actual algae solutions. Herein we thoroughly evaluate the dewatering performance of commercial polyethersulfone (PES) MF mem-branes using an integrated experiment and modeling approach. The effect of algae concentration, testing time, feed flow rate, and chemical cleaning on the dewatering performance and fouling-layer morphology are inves-tigated. The fouling behavior can be successfully described using the Hermia and gel layer models with a gel concentration of 48 g/L for algae solutions. Furthermore, the PES membrane surface was grafted with hydro-philic zwitterions, which mitigated the fouling. For example, when challenged with 10 g/L algae solution in dead-end cells, the pristine and modified membrane exhibit water permeance of 80 and 170 L m-2 h-1 bar- 1, respectively. Three cycles of dewatering and NaOH cleaning were performed to demonstrate the promise of the MF membranes for practical dewatering application.

引用

页数：8