期刊
LIPIDS IN HEALTH AND DISEASE
卷 16, 期 -, 页码 -出版社
BMC
DOI: 10.1186/s12944-017-0587-2
关键词
Pre-treatment; Slaughterhouse wastewater; Hydrolyzed grease; Anaerobic co-digestion; Fixed bed reactor; Biogas yield
资金
- Tunisian Ministry of Higher Education and Scientific Research
- EU within a PASRI framework
Background: This study aimed to investigate the effects of bacterial lipase on biogas production of anaerobic co-digestion of slaughterhouse wastewater (SHWW) and hydrolyzed grease (HG). A neutrophilic Staphylococcus xylosus strain exhibiting lipolytic activity was used to perform microbial hydrolysis pretreatment of poultry slaughterhouse lipid rich waste. Results: Optimum proportion of hydrolyzed grease was evaluated by determining biochemical methane potential. A high biogas production was observed in batch containing a mixture of slaughterhouse composed of 75% SHWW and 25% hydrolyzed grease leading to a biogas yield of 0.6 L/g COD introduced. Fixed bed reactor (FBR) results confirmed that the proportion of 25% of hydrolyzed grease gives the optimum condition for the digester performance. Biogas production was significantly high until an organic loading rate (OLR) of 2 g COD/L. d. Conclusion: This study indicates that the use of biological pre-treatment and FBR for the co-digestion of SHWW and hydrolyzed grease is feasible and effective.
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