Coagulation-membrane filtration of Chlorella vulgaris

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• 作者：Duu-Jong Lee^a ; ^{cedean@mail.ntust.edu.tw} ; ^{djlee@ntu.edu.tw} ; Guan-Yu Liao^b ; Yin-Ru Chang^b ; Jo-Shu Chang^c ; ^d ; ^e
• 关键词：Microalgae ; Harvesting ; Polytetrafluoroethylene membrane ; Polyaluminum chloride
• 刊名：Bioresource Technology
• 出版年：2012
• 期刊代码：11_09608524
• 类别：ce
• 出版时间：March, 2012
• 卷：108
• 期：Complete
• 页码：184-189
• 文件大小：646 K

摘要

Filtration-based separation of Chlorella vulgaris, a species with excellent potential for CO₂ capture and lipid production, was investigated using a surface-modified hydrophilic polytetrafluoroethylene (PTFE) membrane. Coagulation using polyaluminum chloride (PACl) attained maximum turbidity removal at 200 mg L^鈭? as Al₂O₃. The membrane filtration flux at 1 bar 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 10 mg L^鈭? as Al₂O₃, 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 10 mg L^鈭? PACl as Al₂O₃, followed by PTFE membrane filtration at 1 bar, is an effective process for harvesting C. vulgaris from algal froth.