Coagulation-membrane filtration of Chlorella vulgaris

Duu Jong Lee; Guan Yu Liao; Yin Ru Chang; Jo Shu Chang

doi:10.1016/j.biortech.2011.12.098

Coagulation-membrane filtration of Chlorella vulgaris

Duu Jong Lee, Guan Yu Liao, Yin Ru Chang, Jo Shu Chang

Department of Chemical Engineering

Research output: Contribution to journal › Article

32 Citations (Scopus)

Abstract

Filtration-based separation of Chlorella vulgaris, a species with excellent potential for CO ₂ capture and lipid production, was investigated using a surface-modified hydrophilic polytetrafluoroethylene (PTFE) membrane. Coagulation using polyaluminum chloride (PACl) attained maximum turbidity removal at 200mgL ^-1 as Al ₂O ₃. The membrane filtration flux at 1bar increased as the PACl dose increased, regardless of overdosing in the coagulation stage. The filtered cake at the end of filtration tests peaked in solid content at 10mgL ^-1 as Al ₂O ₃, reaching 34% w/w, roughly two times that of the original suspension. Differential scanning calorimetry (DSC) tests demonstrate that the cake with minimum water-solid binding strength produced the driest filter cake. Coagulation using 10mgL ^-1 PACl as Al ₂O ₃, followed by PTFE membrane filtration at 1bar, is an effective process for harvesting C. vulgaris from algal froth.

Original language	English
Pages (from-to)	184-189
Number of pages	6
Journal	Bioresource technology
Volume	108
DOIs	https://doi.org/10.1016/j.biortech.2011.12.098
Publication status	Published - 2012 Mar 1

All Science Journal Classification (ASJC) codes

Bioengineering
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal

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Lee, D. J., Liao, G. Y., Chang, Y. R., & Chang, J. S. (2012). Coagulation-membrane filtration of Chlorella vulgaris. Bioresource technology, 108, 184-189. https://doi.org/10.1016/j.biortech.2011.12.098

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abstract = "Filtration-based separation of Chlorella vulgaris, a species with excellent potential for CO 2 capture and lipid production, was investigated using a surface-modified hydrophilic polytetrafluoroethylene (PTFE) membrane. Coagulation using polyaluminum chloride (PACl) attained maximum turbidity removal at 200mgL -1 as Al 2O 3. The membrane filtration flux at 1bar increased as the PACl dose increased, regardless of overdosing in the coagulation stage. The filtered cake at the end of filtration tests peaked in solid content at 10mgL -1 as Al 2O 3, reaching 34% w/w, roughly two times that of the original suspension. Differential scanning calorimetry (DSC) tests demonstrate that the cake with minimum water-solid binding strength produced the driest filter cake. Coagulation using 10mgL -1 PACl as Al 2O 3, followed by PTFE membrane filtration at 1bar, is an effective process for harvesting C. vulgaris from algal froth.",

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