We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Rice Straw and Swine Manure Anaerobic co-digestion Enhancement Through Bioaugmentation: Effect on the Microbial Community.
- Authors
Carabeo-Pérez, Annerys; López, María Isabel Sánchez; Rivera, Gilda Guerra; Henderson, Deborah; Jiménez, Janet
- Abstract
The degradation of agricultural residues and their bioconversion to methane is still hampered by the search for pre-treatment strategies due to the lignocellulosic content that limits the process efficiency. Adding an enriched microbial consortium could be an alternative for the biological treatment of lignocellulosic biomass. Therefore, during the degradation process, it is necessary to study the dynamics and structure of the microbial community. The objective of this study was to evaluate the addition of an enriched microbial consortium and its effect on the methane-producing prokaryotic community during the anaerobic co-digestion of rice straw and swine manure. Two 10 L semi-continuous stirred tank reactors were used (control and bioaugmentation), during 70 days at 35 ± 2 °C, increasing organic loading rates up to 1.8 g VS/L/d. The diversity and dynamics of the microbial community were analyzed and taxonomic identification was obtained by Ion Torrent metagenomic technique. A higher production was achieved in the bioaugmented reactor (approx. 344 LN/kgVS) concerning the control reactor, increasing the methane yield by 40% (v/v). The metagenomic method allowed the identification down to the genus and species level of the microbial consortium and the prokaryotic community of the reactors, which enabled the assumption of possible metabolic pathways. In both reactors, species diversity decreased over time, indicating a greater specialization of the microbial community. Cellulolytic and methanogenic acetoclastic microorganisms were favored, which supported the higher methane production obtained. The results demonstrate that the consortium could be used as a bioproduct to treat agricultural wastes for energy purposes.
- Subjects
SWINE manure; RICE straw; MICROBIAL communities; BIOREMEDIATION; AGRICULTURAL wastes; LIGNOCELLULOSE; ANAEROBIC digestion
- Publication
BioEnergy Research, 2024, Vol 17, Issue 1, p756
- ISSN
1939-1234
- Publication type
Article
- DOI
10.1007/s12155-023-10676-6