Abstract
This study investigated methane yield via anaerobic digestion of multi-component substrates based on mixtures of biodegradable single-component substrates with cow dung as main component. Bench and full-scale digestion experiments were carried out for both single and multi-component substrates to identify the relationship between methane yield and substrate composition. Results from both bench- and full-scale experiments corresponded well and showed that using multi-component substrates increases the methane yield much more than what would be expected from digestion of single substrates. Process stability as indicated by gas production, pH and NH4+ concentration variations were also improved by using multi-component substrates compared to digestion of single-component substrates. The results, thus, suggest that assessment of methane yield for multi-component substrates cannot reliably be based on methane yields for corresponding single-component substrates but should instead be measured directly.
Original language | English |
---|---|
Pages (from-to) | 2213-2218 |
Number of pages | 6 |
Journal | Bioresource Technology |
Volume | 102 |
Issue number | 3 |
DOIs | |
State | Published - Feb 2011 |
Externally published | Yes |
Keywords
- Agricultural wastes
- Anaerobic digestion
- Methane potential
- Multi-component substrates
- Single-component substrates