Microalgal Biomass and Lipid Production on Dairy Effluent Using a Novel Microalga, Chlorella sp. Isolated from Dairy Wastewater

• Published in: Biotechnology and bioprocess engineering Vol. 23; no. 3; pp. 333 - 340
• Main Authors: Choi, Yong-Keun, Jang, Hyun Min, Kan, Eunsung
• Format: Journal Article
• Language: English
• Published: Seoul The Korean Society for Biotechnology and Bioengineering 01.06.2018; Springer Nature B.V; 한국생물공학회
• Subjects: Algae; algae culture; biodiesel; Biodiesel fuels; Biofuels; Biomass; Biotechnology; chemical oxygen demand; Chemistry; Chemistry and Materials Science; Chlorella; Chlorella vulgaris; cost effectiveness; Cultivation; Dairy industry wastewaters; Dilution; Effluents; Fatty acid composition; Fatty acids; fuel production; Heterotrophic growth; Industrial and Production Engineering; Lipids; Microalgae; Nutrients; Research Paper; Trace elements; Turbidity; Wastewater; 생물공학; dairy effluent; microalgae; algal biomass; algal biodiesel; dilution
• ISSN: 1226-8372; 1976-3816
• DOI: 10.1007/s12257-018-0094-y

The present study focused on cost-effective production of microalgal biomass and lipid production on dairy effluent. The novel microalga, Chlorella sp. isolated from the dairy effluent showed high growth and lipid production on the undiluted and two-fold diluted dairy effluent which were four to five times higher than those of Chlorella vulgaris (control). The high growth of Chlorella sp. was thought to be possibly due to its heterotrophic growth capacity, high turbidity, COD, nutrients and trace elements. In contrast, C. vulgaris showed poor heterotrophic and photoautotrophic growth under the highly turbid conditions of dairy effluent. Both Chlorella sp. and C. vulgaris showed similar total FAME (mg FAME/g algal cells). The fatty acid composition analysis revealed that both Chlorella sp. and C. vulgaris possessed major C18 and C20 fatty acids which will be used for biodiesel production. Overall, the novel microalga, Chlorella sp. isolated from the dairy effluent showed high potential for cost-effective algal cultivation and lipid production on dairy effluent without any modification of process.