Anaerobic digestion of lipid-rich swine slaughterhouse waste: Methane production performance, long-chain fatty acids profile and predominant microorganisms.
Bioresour Technol
; 269: 426-433, 2018 Dec.
Article
in En
| MEDLINE
| ID: mdl-30268045
ABSTRACT
This study investigated methane production, long-chain fatty acids (LCFAs) profile, and predominant microorganisms in anaerobic digestion (AD) of lipid-rich swine slaughterhouse waste (SSW). The maximum methane yield was 999.2â¯mL/g VS. LCFAs, as inhibitory hydrolysis products, accumulated first to 1165â¯mg/L on day 3, and then decreased sharply to 125.7â¯mg/L on day 9, and finally were degraded to 20â¯mg/L on day 27. Linoleic acid (C182), oleic acid (C181) and palmitic acid (C160) were the dominant LCFAs. The easy conversion of C181 to C160 compared with difficult degradation of C160 resulted in an increase of C160 on day 4-6. Predominant microorganisms were Clostridium, Syntrophomonas and Methanospirillum. This study proved the high methane potential of lipid-rich SSW and gained insights into the degradation process by analysis of intermediates of LCFAs and predominant microorganisms. The results can provide valuable guidance for efficient utilization of this waste to produce methane in future.
Key words
Full text:
1
Database:
MEDLINE
Main subject:
Abattoirs
/
Fatty Acids
/
Methane
Limits:
Animals
Language:
En
Year:
2018
Type:
Article