Bacteria and archaea involved in anaerobic digestion of distillers grains with solubles

Article


Ziganshin, Ayrat M., Schmidt, Thomas, Scholwin, Frank, Il'Inskaya, Olga N., Harms, Hauke and Kleinsteuber, Sabine. 2011. "Bacteria and archaea involved in anaerobic digestion of distillers grains with solubles." Applied Microbiology and Biotechnology. 89 (6), pp. 2039-2052. https://doi.org/10.1007/s00253-010-2981-9
Article Title

Bacteria and archaea involved in anaerobic digestion of distillers grains with solubles

ERA Journal ID3330
Article CategoryArticle
AuthorsZiganshin, Ayrat M. (Author), Schmidt, Thomas (Author), Scholwin, Frank (Author), Il'Inskaya, Olga N. (Author), Harms, Hauke (Author) and Kleinsteuber, Sabine (Author)
Journal TitleApplied Microbiology and Biotechnology
Journal Citation89 (6), pp. 2039-2052
Number of Pages14
Year2011
Place of PublicationGermany
ISSN0175-7598
1432-0614
Digital Object Identifier (DOI)https://doi.org/10.1007/s00253-010-2981-9
Web Address (URL)http://link.springer.com/article/10.1007%2Fs00253-010-2981-9
Abstract

Cereal distillers grains, a by-product from bioethanol industry, proved to be a suitable feedstock for biogas production in laboratory scale anaerobic digesters. Five continuously stirred tank reactors were run under constant conditions and monitored for biogas production and composition along with other process parameters. Iron additives for sulfide precipitation significantly improved the process stability and efficiency, whereas aerobic pretreatment of the grains had no effect. The microbial communities in the reactors were investigated for their phylogenetic composition by terminal restriction fragment length polymorphism analysis and sequencing of 16S rRNA genes. The bacterial subcommunities were highly diverse, and their composition did not show any correlation with reactor performance. The dominant phylotypes were affiliated to the Bacteroidetes. The archaeal subcommunities were less diverse and correlated with the reactor performance. The well-performing reactors operated at lower organic loading rates and amended with iron chloride were dominated by aceticlastic methanogens of the genus Methanosaeta. The well-performing reactor operated at a high organic loading rate and supplemented with iron hydroxide was dominated by Methanosarcina ssp. The reactor without iron additives was characterized by propionate and acetate accumulation and high hydrogen sulfide content and was dominated by hydrogenotrophic methanogens of the genus Methanoculleus.

KeywordsBiogas; DDGS; T-RFLP; Methanogenic archaea; Porphyromonadaceae; Actinomycetales
ANZSRC Field of Research 2020401199. Environmental engineering not elsewhere classified
300699. Food sciences not elsewhere classified
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Byline AffiliationsKazan Federal University, Russia
DBFZ German Biomass Research Centre, Germany
Helmholtz Centre for Environmental Research, Germany
Institution of OriginUniversity of Southern Queensland
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