Effect of bacterial lipase on anaerobic co-digestion of slaughterhouse wastewater and grease in batch condition and continuous fixed-bed reactor

Lipids in Health and Disease

Research

Fatma Hadrich¹  Slim Loukil¹  Fathi Aloui¹  Maha Affes¹  Sami Sayadi¹ 

[1] Environmental Bioprocesses Laboratory, LMI Cosys-Med, Centre of Biotechnology of Sfax, BP 1177, 3018, Sfax, Tunisia;

关键词: Pre-treatment;    Slaughterhouse wastewater;    Hydrolyzed grease;    Anaerobic co-digestion;    Fixed bed reactor;    Biogas yield;   

DOI  :  10.1186/s12944-017-0587-2

 received in 2017-05-31, accepted in 2017-10-02,  发布年份 2017

来源: Springer

【 摘 要 】

BackgroundThis 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.ResultsOptimum 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.ConclusionThis study indicates that the use of biological pre-treatment and FBR for the co-digestion of SHWW and hydrolyzed grease is feasible and effective.

【 授权许可】

CC BY   
© The Author(s). 2017