Thermophilic anaerobic co-digestion of poultry litter and thin stillage.
Bioresour Technol
; 136: 251-6, 2013 May.
Article
in En
| MEDLINE
| ID: mdl-23567688
ABSTRACT
The purpose of this study was to test whether the performance of a thermophilic CSTR digester that has been stabilized on poultry litter will be enhanced or diminished by the addition of thin stillage as co-substrate. Replicate laboratory digesters, derived from a stable pilot-scale digester, were operated with increasing ratios (w/w) of thin stillage/poultry litter feedstock. After a period of adaptation to 20% and 40% thin stillage, digester performance showed increases in biogas, percent methane and COD removal, as well as a decrease in volatile acids. Peak performance occurred with 60% thin stillage. However, 80% thin stillage caused significant reduction of performance, including declines of methanogenic activity and COD removal. In conclusion, supplementing the thermophilic digestion of poultry litter with thin stillage improved the bioenergy (methane) output, but thin stillage became inhibitory at high concentrations.
Full text:
1
Database:
MEDLINE
Main subject:
Poultry
/
Waste Products
/
Biotechnology
Limits:
Animals
Language:
En
Journal:
Bioresour Technol
Journal subject:
ENGENHARIA BIOMEDICA
Year:
2013
Type:
Article
Affiliation country:
United States