Maximization of volatile fatty acids production from alginate in acidogenesis

• Published in: Bioresource technology Vol. 148; pp. 601 - 604
• Main Authors: Pham, Hong Duc, Seon, Jiyun, Lee, Seong Chan, Song, Minkyung, Woo, Hee-Chul
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.11.2013; Elsevier
• Subjects: Acids - metabolism; Alcohols; Alginate; Alginates; Alginates - metabolism; Anaerobic fermentation; Anaerobiosis; Biological and medical sciences; Biotechnology; Ethanol; Ethyl alcohol; Fatty acids; Fatty Acids, Volatile - biosynthesis; Fundamental and applied biological sciences. Psychology; Glucuronic Acid - metabolism; Hexuronic Acids - metabolism; Marine brown algae; Maximization; Methods. Procedures. Technologies; Microbial engineering. Fermentation and microbial culture technology; Models, Theoretical; Optimization; Response surface methodology; Volatile fatty acids; Anaerobic fermentation; Alginate; Response surface methodology; Volatile fatty acids; Marine brown algae; Maximization; Algae; Marine alga; Alginates; Heterokontophyta; Acidogenesis; Volatile fatty acid; Response surface; Phaeophyceae
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2013.08.128

•The VFA production from alginate as a feedstock was approached for the first time.•Optimization of alginate concentration and initial pH was determined using RSM.•The effect of variables on VFAs production was evaluated.•Acetic acid was the major component of the alginate fermentation. In this study, the response surface methodology (RSM) was applied to determine the optimum fermentative condition of alginate with the respect to the simultaneous effects of alginate concentration and initial pH to maximize the production of total volatile fatty acids (TVFAs) and alcohols. The results showed that the alginate fermentation was significantly affected by initial pH than by alginate concentration and there was no interaction between the two variables. The optimum condition was 6.2g alginate/L and initial pH 7.6 with a maximum TVFAs yield of 37.1%. Acetic acids were the main constituents of the TVFAs mixtures (i.e., 71.9–95.5%), while alcohols (i.e., ethanol, butanol, and propanol) were not detected.