Harvesting of Scenedesmus obliquus FSP-3 using dispersed ozone flotation.
The Scenedesmus obliquus FSP-3, a species with excellent potential for CO(2) capture and lipid production, was harvested using dispersed ozone flotation. While air aeration does not, ozone produces effective solid-liquid separation through flotation. Ozone dose applied for sufficient algal flotation is similar to those used in practical drinking waterworks. The algae removal rate, surface charge, and hydrophobicity of algal cells, and fluorescence characteristics and proteins and polysaccharides contents of algogenic organic matter (AOM) were determined during ozonation. Proteins released from tightly bound AOM are essential to modifying the hydrophobicity of bubble surfaces for easy cell attachment and to forming a top froth layer for collecting floating cells. Humic substances in the suspension scavenge dosed ozone that adversely affects ozone flotation efficiency of algal cells.
Cheng
Ya-Ling
YL
Department of Chemical Engineering, National Taiwan University, Taipei 106, Taiwan.
Juang
Yu-Chuan
YC
Liao
Guan-Yu
GY
Tsai
Pei-Wen
PW
Ho
Shih-Hsin
SH
Yeh
Kuei-Ling
KL
Chen
Chun-Yen
CY
Chang
Jo-Shu
JS
Liu
Jhy-Chern
JC
Chen
Wen-Ming
WM
Lee
Duu-Jong
DJ
D018929:Cell Culture Techniques / Q000379:methods*; D004326:Drinking; D005453:Fluorescence; D005740:Gases / Q000737:chemistry; D006812:Humic Substances / Q000032:analysis; D057927:Hydrophobic and Hydrophilic Interactions; D009930:Organic Chemicals / Q000032:analysis; D010126:Ozone / Q000737:chemistry*; D011134:Polysaccharides / Q000032:analysis; D011506:Proteins / Q000032:analysis; D044444:Scenedesmus / Q000502:physiology*
D005740:Gases; D006812:Humic Substances; D009930:Organic Chemicals; D011134:Polysaccharides; D011506:Proteins; D010126:Ozone