http://dx.doi.org/10.1016/j.biortech.2014.02.014">
 

Document Type

Journal Article

Department/Unit

Department of Biology

Title

A novel way to utilize hydrogen and carbon dioxide in acidogenic reactor through homoacetogenesis

Language

English

Abstract

This study investigated the potential of Acetobacterium woodii, a homoacetogen, in co-culture with common acetogens for acetate production during glucose fermentation. Three types of inocula, A. woodii (AW), heat-treated sludge (HTS) and co-culture of A. woodii and heat-treated sludge (AW-HTS) were investigated. Results showed that ~150. mM of glucose was almost completely converted to biomass, gases and other products in co-culture. The addition of A. woodii induced homoacetogenic fermentation in AW-HTS during the first 3. days, as evidenced by the decreased hydrogen production and acetate dominance (>90%, corresponding to 1.19. mol. acetate/mol. glucose) in total soluble products. However, due to the unfavorable environmental conditions, metabolic pathway in AW-HTS treatment shifted towards butyrate type at the end of the experiment. Bacterial diversity analysis indicated that species supporting growth of A. woodii were dominant during the first several days and their abundance gradually decreased until the end of experiment. © 2014 Elsevier Ltd.

Keywords

Acetate production, Acetobacterium woodii, Heat-treated sludge, Syntrophic co-culture

Publication Date

2014

Source Publication Title

Bioresource Technology

Volume

159

Start Page

249

End Page

257

Publisher

Elsevier

ISSN (print)

09608524

ISSN (electronic)

18732976

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