A two-stage bioprocess for hydrogen and methane production from rice straw bioethanol residues

Hai Hsuan Cheng, Liang-Ming Whang, Chao Wei Wu, Man Chien Chung

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

This study evaluates a two-stage bioprocess for recovering hydrogen and methane while treating organic residues of fermentative bioethanol from rice straw. The obtained results indicate that controlling a proper volumetric loading rate, substrate-to-biomass ratio, or F/M ratio is important to maximizing biohydrogen production from rice straw bioethanol residues. Clostridium tyrobutyricum, the identified major hydrogen-producing bacteria enriched in the hydrogen bioreactor, is likely utilizing lactate and acetate for biohydrogen production. The occurrence of acetogenesis during biohydrogen fermentation may reduce the B/A ratio and lead to a lower hydrogen production. Organic residues remained in the effluent of hydrogen bioreactor can be effectively converted to methane with a rate of 2.8mmol CH 4/gVSS/h at VLR of 4.6kgCOD/m 3/d. Finally, approximately 75% of COD in rice straw bioethanol residues can be removed and among that 1.3% and 66.1% of COD can be recovered in the forms of hydrogen and methane, respectively.

Original languageEnglish
Pages (from-to)23-29
Number of pages7
JournalBioresource Technology
Volume113
DOIs
Publication statusPublished - 2012 Jun 1

Fingerprint

Bioethanol
Methane
Straw
straw
Hydrogen
rice
methane
hydrogen
Bioreactors
bioreactor
Clostridium
Hydrogen production
Fermentation
Effluents
Lactic Acid
Bacteria
Acetates
Biomass
fermentation
acetate

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Environmental Engineering
  • Waste Management and Disposal

Cite this

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A two-stage bioprocess for hydrogen and methane production from rice straw bioethanol residues. / Cheng, Hai Hsuan; Whang, Liang-Ming; Wu, Chao Wei; Chung, Man Chien.

In: Bioresource Technology, Vol. 113, 01.06.2012, p. 23-29.

Research output: Contribution to journalArticle

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