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Microbial community dynamics reflect reactor stability during the anaerobic digestion of a very high strength and sulfate‐rich vinasse

  • BACKGROUND Microbial community dynamics during the anaerobic digestion of vinasse has been little studied. However, having knowledge about it is essential for early detection of reactor operational difficulties to apply preventive actions. This research studies the microbial community dynamics in the anaerobic digestion of vinasse, linking to experimental observations about product yields and organic matter degradation. RESULTS Methane and sulfide yields decreased with increasing SO42‐/COD ratio, while the fraction of organic matter degraded by sulfate reducing bacteria increased from 4.5 ± 0.3% to 27.1 ± 0.6%. The archaeal community showed that acetoclastic Methanosaetaceae were little affected by the increase of the SO42‐/COD ratio, in contrast to the Methanomicrobiales and Methanobacteriales population, which decreased during the experiment. The total bacterial diversity was influenced mainly by substrate composition, showing that the increase of the SO42‐/COD ratio above 0.10 shifted the bacterial community to a lowerBACKGROUND Microbial community dynamics during the anaerobic digestion of vinasse has been little studied. However, having knowledge about it is essential for early detection of reactor operational difficulties to apply preventive actions. This research studies the microbial community dynamics in the anaerobic digestion of vinasse, linking to experimental observations about product yields and organic matter degradation. RESULTS Methane and sulfide yields decreased with increasing SO42‐/COD ratio, while the fraction of organic matter degraded by sulfate reducing bacteria increased from 4.5 ± 0.3% to 27.1 ± 0.6%. The archaeal community showed that acetoclastic Methanosaetaceae were little affected by the increase of the SO42‐/COD ratio, in contrast to the Methanomicrobiales and Methanobacteriales population, which decreased during the experiment. The total bacterial diversity was influenced mainly by substrate composition, showing that the increase of the SO42‐/COD ratio above 0.10 shifted the bacterial community to a lower richness. CONCLUSION These results provide knowledge on the dynamics of the microbial communities, which can be useful to control the anaerobic digestion of sulfate‐rich vinasses, showing that reactor stability equates to the higher ratios between total methanogens and total bacteria gene copy numbers, whereas operational difficulties can be associated to lower bacterial richness and higher community organization.show moreshow less
Metadaten
Author: Janet Jiménez, Ernesto L. Barrera, Jo de Vrieze, Nico Boon, Steven DeMeester, Henri Spanjers, Prof. Tit. Dr. C. Ing. Osvaldo Romero, Jo Dewulf
Parent Title (English):Journal of Chemical Technology & Biotechnology
Document Type:Article
Language:English
Date of Publication (online):2018/04/17
Date of first Publication:2017/09/26
Publishing Institution:SRH Berlin University of Applied Sciences
Release Date:2018/04/17
Tag:Anaerobic digestion; Biotechnology; Methanomicrobiales
Volume:993
Issue:4
First Page:975
Last Page:984
Note:
Volltext aus urheberrechtlichen Gründen nicht verfügbar.
Full text due to copyright not available.
Link author profile:https://www.srh-hochschule-berlin.de/de/hochschule/hochschulteam/romero-osvaldo/
JEL-Classification:I Health, Education, and Welfare
Licence (German):License LogoCreative Commons - CC BY-NC-ND - Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International
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