Format

Send to

Choose Destination
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2012;47(12):1795-802. doi: 10.1080/10934529.2012.689237.

Effect of low temperature thermal pre-treatment on the solubilization of organic matter, pathogen inactivation and mesophilic anaerobic digestion of poultry sludge.

Author information

1
Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana - Azcapotzalco, Distrito Federal, México. al209180435@alumnos.azc.uam.mx

Abstract

Treatment of poultry industry effluents produces wastewater sludge with high levels of organic compounds and pathogenic microorganisms. In this research, the thermal pre-treatment of poultry slaughterhouse sludge (PSS) was evaluated for low temperatures in combination with different exposure times as a pre-hydrolysis strategy to improve the anaerobic digestion process. Organic compounds solubilization and inactivation of pathogenic microorganisms were evaluated after treatment at 70, 80 or 90°C for 30, 60 or 90 min. The results showed that 90°C and 90 min were the most efficient conditions for solubilization of the organic compounds (10%). In addition, the bacteria populations and the more resistant structures, such as helminth eggs (HE), were completely inactivated. Finally, the thermal pre-treatment applied to the sludge increased methane yield by 52% and reduced hydraulic retention time (HRT) by 52%.

PMID:
22755526
DOI:
10.1080/10934529.2012.689237
[Indexed for MEDLINE]

Supplemental Content

Loading ...
Support Center