Cyclic Filtration-Cleaning of Chlorella vulgaris Using Surface-Modified Hydrophilic Polytetrafluoroethylene Membrane with Polyaluminum Chloride as Coagulant

Duu Jong Lee, Gwan Yu Chen, Yin Ru Chang, Arun S. Mujumdar, Jo Shu Chang

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Membrane filtration can efficiently harvest microalgae from culture broth. The performances of cyclic filtration and cleaning tests on Chlorella vulgaris were evaluated with polyaluminum chloride (PACl) coagulation and with a surface-modified hydrophilic polytetrafluoroethylene (PTFE) membrane under 1 bar pressure drop. Filtration of the original algal suspension without PACl coagulation could lead to severe irreversible fouling on the PTFE membrane. Coagulation using 10 mgl-1 PACl can mitigate pore blocking but cannot enhance filtration flux. With 500 mgl-1 PACl, most fines were incorporated into large flocs to build up cakes of low resistance and protect membrane pores from severe blocking. Flux recovery all exceeded 95% with ≥10 mgl-1 PACl dosage. The PACl-coagulation and surface modified PFTE membrane are feasible to dehydrate Chlorella vulgaris ESP-6 isolate using cyclic filtration-cleaning process.Supplemental materials are available for this article. Go to the publisher's online edition of Drying Technology to view the free supplemental file.

Original languageEnglish
Pages (from-to)207-212
Number of pages6
JournalDrying Technology
Volume31
Issue number2
DOIs
Publication statusPublished - 2013 Jan 1

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry

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