Dispersed ozone flotation of Chlorella vulgaris

作者：Cheng Ya Ling; Juang Yu Chuan; Liao Guan Yu; Ho Shih Hsin; Yeh Kuei Ling; Chen Chun Yen; Chang Jo Shu; Liu Jhy Chern; Lee Duu Jong^*

来源：Bioresource Technology, 2010, 101(23): 9092-9096.

DOI：10.1016/j.biortech.2010.07.016

• Algae
• Harvesting
• Ozone
• Flotation
• Algogenic organic matters

Flotation separation of Chlorella vulgaris, a species with excellent potential for CO(2) capture and lipid production, was studied using dispersed ozone gas. Pure oxygen aeration did not yield flotation. Conversely, applying ozone effectively separation algae from broth through flotation. The ozone dose applied for sufficient algal flotation is <0.05 mg/g biomass, much lower than those used in practical drinking water-works (0.1-0.3 mg/g suspended solids). Main products, lipid C16:0, was effectively collected in the flotage phase. The algae removal rate, surface charge, and hydrophobicity of algal cells, and proteins and polysaccharides contents of algogenic organic matter (AOM) were determined. Certain quantities of proteins were present in the cultivated algal suspension, hence, minimal quantity of ozone was required to release intracellular proteins as surfactants to lead to effective flotation.

• 出版日期2010-12