☆ 4.8 Article

A highly efficient and energy-saving magnetically induced membrane vibration system for harvesting microalgae

BIORESOURCE TECHNOLOGY (2020)

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Journal

BIORESOURCE TECHNOLOGY
Volume 300, Issue -, Pages -

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.122688

Keywords

Microalgae; Membrane bioreactor; Vibration system; PVDF membranes; Membrane filtration; Phase inversion

Categories

Agricultural Engineering Biotechnology & Applied Microbiology Energy & Fuels

Funding

  1. IWT-STW (SBO Nanomexico)
  2. China Scholarship Council

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The optimal operational parameters of a second generation magnetically induced membrane vibration (MMV) system were determined using the response surface methodology (RSM) combined with single-factor experiments. The membrane surfaces were characterized by scanning electron microscopy (SEM) and algae cell states by inverted microscopy. The effect of an intermittent vibration strategy on filtration performance and energy consumption was studied. The results showed that the responses could be fitted by RSM models. High membrane flux, low energy consumption, efficient fouling control and no damage to the microalgae could thus be realized. The filtration strategy tests suggested that an intermittent cycle time of 4 min with 50% vibration rate could be the best vibration strategy for harvesting the microalgae under investigation.

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