Combining patterned membrane filtration and flocculation for economical microalgae harvesting.

Water Research
Zhenyu ZhaoIvo F J Vankelecom

Abstract

Membranes have a lot of potential for harvesting microalgae, but mainly membrane fouling and high harvesting costs linked to low fluxes are hampering their breakthrough. Patterned membranes can reduce fouling by enchancing local turbulences close to the membrane surface on one hand, and by increasing the active area per m2 of installed membrane on the other. Flocculation can further increase membrane permeance by increasing microalgal partical size and reducing the fraction of free organic matter in the feed. In current study, the effect of polyethylene glycol (PEG) in the casting solution of patterned polysulfone membranes was investigated to better tune the performance of the patterned membranes, together with the effects of cross-flow velocity and chitosan dosage on membrane fouling. The energy consumption and total harvesting cost, extrapolated to a full-scale microalgal harvesting, were then estimated. The patterned membrane prepared with a 28w% PEG concentration showed the highest clean water permeance (900±22 L/m2 h bar) and membrane permeance in a microalgal suspension (590±17 L/m2 h bar). Patterned membranes showed a lower filtration resistance (15% permeance decline at the end of filtration) than flat membranes (72%) ...Continue Reading

References

Jan 21, 2012·Bioresource Technology·Duu-Jong LeeJo-Shu Chang
Mar 7, 2012·Bioresource Technology·M R BiladIvo F J Vankelecom
Sep 27, 2012·Bioresource Technology·Dries VandammeKoenraad Muylaert
Dec 25, 2012·Bioresource Technology·Yanan XuFrank Baganz
Jan 23, 2013·Trends in Biotechnology·Dries VandammeKoenraad Muylaert
Apr 23, 2013·Bioresource Technology·Balachandran Ketheesan, Nagamany Nirmalakhandan
Aug 12, 2014·Biotechnology Advances·M R BiladIvo F J Vankelecom
Jun 10, 2018·Journal of Environmental Management·M R BiladA R M Yusoff
Apr 20, 2020·Bioresource Technology·Zhenyu ZhaoIvo F J Vankelecom

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Citations

Aug 27, 2021·Membranes·Roberto Castro-Muñoz, Octavio García-Depraect

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