Separation of algal cells from water by column flotation

Journal Article · Sun Aug 01 04:00:00 EDT 1999 · Separation Science and Technology

DOI:https://doi.org/10.1081/SS-100100771· OSTI ID:682274

Liu, J C; Chen, Y M; Ju, Y H ^[1]

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1. National Taiwan Univ. of Science and Technology, Taipei (Taiwan, Province of China). Dept. of Chemical Engineering

The dispersed air flotation (DiAF) process was utilized to separate algal cells (Chlorella sp.) from water. Two types of collector, cationic N-cetyl-N,N,N-trimethylammonium bromide (CTAB) and anionic sodium dodecylsulfate (SDS), were used. It was observed that 20% of cell removal was achieved in the presence of 40 mg/L of SDS, and ca. 86% of the cells were removed at 40 mg/L of CTAB. Upon the addition of 10 mg/L of chitosan, over 90% of the cells were removed when SDS (20 mg/L) was used as the collector. Air flow rate affected cell flotation slightly. Optimum pH values for cell flotation were from 4.0 to 5.0. Flotation efficiency decreased at high ionic strength. The electrostatic interaction between collector and cell surface plays a critical role in the separation processes.

• OSTI ID: 682274
• Journal Information: Separation Science and Technology, Journal Name: Separation Science and Technology Journal Issue: 11 Vol. 34; ISSN 0149-6395; ISSN SSTEDS
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
AIR FLOW
CHLORELLA
EFFICIENCY
EXTRACTION COLUMNS
FLOTATION
REAGENTS