Sammanfattning

To increase the knowledge of microbial adaptation for high degradation ability under ammonia stressed conditions, the metabolic performance and the microbial community in a full-scale chicken manure anaerobic digestion (AD) plant, operated over a 10-year, were investigated. The methanogenic pathway employing labeled acetate (2-C-13), aceticlastic methanogenesis activity, and the Illumina sequencing of microbiome structure at the plant were analyzed. The obtained results show that this active plant achieved a methane yield of 310 +/- 43 mL/g-volatile solids (VS), high stability under an ammonium-N level of 6.2 +/- 0.1 g/L, and an organic loading rate of 2.5 g-VS/(L.d). The extremely long adaptation developed the unique microbe communities, and the hydrogentrophic methanogens Methanobrevibacter (76%) and Methanoculleus (18%) were dominant in the main digester. The acetoclastic methanogenic pathway reached 42%, contributing to the deep degradation. The current study thus may lay the foundation for illustrating the successful full-scale AD of nitrogen-rich materials under stressed operating conditions. (c) 2020 Elsevier Ltd. All rights reserved.

Nyckelord

Anaerobic digestion; Full-scale biogas plant; Microbial acclimation; Methanogenic pathway; Microbial communities; Chicken manure

Publicerad i

Renewable Energy
2021, Volym: 167, sidor: 644-651
Utgivare: PERGAMON-ELSEVIER SCIENCE LTD

SLU författare

• Westerholm, Maria

  • Institutionen för molekylära vetenskaper, Sveriges lantbruksuniversitet
    

Globala målen

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UKÄ forskningsämne

Mikrobiologi
Bioenergi


Publikationens identifierare

DOI: https://doi.org/10.1016/j.renene.2020.11.133

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/110504