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PubMed Publications| Keyword search (4,163 papers available) |  |
"Aerobic" Keyword-tagged Publications:
| Title: | Anaerobic Digestion of Pig-Manure Solids at Low Temperatures: Start-Up Strategies and Effects of Mode of Operation, Adapted Inoculum, and Bedding Material | ||||
| Authors: | Rajagopal R, Bele V, Saady NMC, Hickmann FMW, Goyette B | ||||
| Link: | pubmed.ncbi.nlm.nih.gov/36134981/ | ||||
| DOI: | 10.3390/bioengineering9090435 | ||||
| Publication: | Bioengineering (Basel, Switzerland) | ||||
| Keywords: | adapted inoculum; bedding; dry anaerobic digestion; high-solids; pig manure; | ||||
| PMID: | 36134981 | Category: | Date Added: | 2022-09-22 | |
| Dept Affiliation: |
ENCS
1 Sherbrooke Research and Development Center, Agriculture and Agri-Food Canada, 2000 College Street, Sherbrooke, QC J1M 0C8, Canada. 2 Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, QC H3G 1M8, Canada. 3 Civil Engineering Department, Memorial University of Newfoundland, St. John's, NL A1B 3X5, Canada. 4 Département des Sciences Animales, Faculté des Sciences de l'Agriculture et de l'Alimentation, Université Laval, Québec, QC G1V 0A6, Canada. 5 Departamento de Zootecnia, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves 7712, Porto Alegre 91540-000, Brazil. |
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Description: |
The objective of this study was to obtain start-up strategies for the operation of a dry anaerobic digestion (DAD) system treating pig-manure (PM) solids at low-temperatures, and evaluate the effects of operation mode, adapted inoculum, and bedding material on the performance. A DAD system coupled with an inoculum system (two-stage DAD) was operated at 20 ± 1 °C to digest PM solids (Total Solids, TS: 27%) with wheat straw or woodchips as bedding materials (TS substrate-mixture: 45%) using a liquid inoculum. Static DAD was also operated in parallel for comparison purposes. Overall, the percolation-recirculation mode of operation was superior to the static mode; the former had more than a 3-fold increase in specific methane yield in cycle 3. Using the adapted inoculum in cycle-2 improved methane yield by 7% and 26% for cycles 1 and 3, respectively, under the percolation-recirculation mode of operation. In addition, the digestate resulting from the digestion of woodchips + PM solids had better physical characteristics than wheat straw + PM solids. Thus, anaerobic digestion of pig-manure solids at low-temperatures with appropriate start-up strategies, inoculum, and bedding material is a promising technology for transforming PM solids into biogas and using its digestate as biofertilizer. |
