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Valuable biochemical production in mixed culture fermentation: fundamentals and process coupling.

Authors :
Dai, Kun
Wen, Jun-Li
Zhang, Fang
Zeng, Raymond
Source :
Applied Microbiology & Biotechnology; Sep2017, Vol. 101 Issue 17, p6575-6586, 12p
Publication Year :
2017

Abstract

The mixed culture fermentation is an important environmental biotechnology that converts biodegradable organic wastes to valuable chemicals such as hydrogen, methane, acetate, ethanol, propionate, and so on. For the multistep process of hydrolysis, acidogenesis, acetogenesis/homoacetogensis, and methanogenesis, the typical metabolic reactions are firstly summarized. And then, since the final metabolites are always a mixture, the separation and purification processes are necessary to couple with anaerobic fermentation. Therefore, several typical coupling technologies including biogas upgrading, two-stage fermentation, gas stripping, membrane technology of pervaporation, membrane distillation, electrodialysis, bipolar membrane electrodialysis, and microbial fuel cells are summarized to separate the metabolites and recover energy. At last, the novel technologies such as the controlled metabolite production, medium chain carboxylic acid production, and high temperature ethanol recovery in thermophilic mixed culture fermentation are also reviewed. However, the novel concepts are still needed to meet the demands of better overall performances and lower total costs. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
01757598
Volume :
101
Issue :
17
Database :
Complementary Index
Journal :
Applied Microbiology & Biotechnology
Publication Type :
Academic Journal
Accession number :
124585869
Full Text :
https://doi.org/10.1007/s00253-017-8441-z