title: Effect of low temperature thermal pre-treatment on the solubilization of organic matter, pathogen inactivation and mesophilic anaerobic digestion of poultry sludge.
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%.
authors: Departamento de Ciencias Básicas, Universidad Autónoma Metropolitana - Azcapotzalco, Distrito Federal, México. al209180435@alumnos.azc.uam.mx
authors: Juan E
authors: JE
authors: Ruiz-Espinoza
authors: Juan M
authors: JM
authors: Méndez-Contreras
authors: Alejandro
authors: A
authors: Alvarado-Lassman
authors: Sergio A
authors: SA
authors: Martínez-Delgadillo
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D008697:Methane / Q000378:metabolism; D011200:Poultry; D012722:Sewage; D012995:Solubility; D013696:Temperature
chemical_list: D012722:Sewage; D008697:Methane