Title:
Multi-feedstock Anaerobic Digestion to Enhance 2nd Generation Methane Production
Author(s):
Vasmara, C., Orsi, A., Bochicchio, D., Ceotto, E.
Document(s):
Paper
Abstract:
The study aimed to evaluate the methane production of a multi-feedstock system compared to mono-digestion of maize silage. The impact of pig slurry addition on methane yield was also evaluated. Multi-feedstock mixture was composed of beet pulp, maize stover, confectionery waste, prickly pear pruning, and grape pomace. One gram of volatile solids of each feedstock was added to the reactor. Methane production was evaluated in laboratory static mesophilic batch conditions for multi-feedstock and silage maize in mono-digestion (500 mL reactors, 5 g of volatile solids of biomass, 213 mL tap water) and with 213 mL of pig slurry as a substitute for tap water. Multi-feedstock with and without pig slurry reached similar methane yield (311 and 306 mL), comparable to those achieved by maize silage in mono-digestion. On the contrary, the mixture maize silage + pig slurry reached the lowest methane yield (212 mL). This indicates a negative interaction between maize silage and pig slurry in anaerobic digestion. Considering the overall methane production, the pig slurry addition to the reactors with the multi-feedstock increased the methane production by 30% compared to maize silage and by 45%, compared to maize silage with pig slurry.
Keywords:
agricultural residues, biogas, maize, organic waste, sugar beet, agroindustrial residues
Topic:
Biomass Conversion for Bioenergy
Subtopic:
Anaerobic digestion for biogas and biomethane production
Event:
31st European Biomass Conference and Exhibition
Session:
4DO.7.1
Pages:
662 - 664
ISBN:
978-88-89407-23-3
Paper DOI:
10.5071/31stEUBCE2023-4DO.7.1
Price:
FREE
