期刊
BIORESOURCE TECHNOLOGY
卷 364, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2022.128039
关键词
Anaerobic digester; Co -digestion; Substrates; Microbiome; Methanogenesis
资金
- Teknillis-Yhteiskunnallinen Tutkimussaatio sr
- European Regional Development Fund (ERDF) from the Sustainable growth and jobs -Structural Fund Programme of Finland 2014-2020 [A72933]
- University of Turku
- Abo Akademi University
- Biocenter Finland
This study investigated the effects of co-feedstock changes on the performance and evolution of microbial consortia in anaerobic digestion of cow slurry. Despite drastic changes in co-feedstock composition, stable and flexible anaerobic digestion can be achieved with cautious operation of the process.
To enable the utilization of seasonal biomasses in e.g., farm-scale biogas plants, the process should be flexible and ensure stable gas production. However, information about microbial community dynamics in long-term codigestion with versatile co-feedstocks is lacking. This study investigated the effects of co-feedstock changes on the performance and evolution of microbial consortia during 428-day anaerobic digestion of cow slurry. Cofeedstocks consisted of hydrocarbon-, protein- and lipid-rich materials. A high throughput 16S ribosomal RNA gene sequencing was used to analyze the taxonomic profile of microbial communities. Due to the low loading rate, the changes were subtle in bacteria, but a shift on archaeal genera in response to different and changing feedstock compositions was observed. Despite drastic changes in co-feedstock composition, stable and flexible anaerobic digestion with relatively constant core microbiome can be achieved with cautious operation of the process.
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