title: Thermal steam explosion pretreatment to enhance anaerobic biodegradability of the solid fraction of pig manure.
abstract: The assessment of the biodegradability of thermal steam-exploded pig manure was performed compared to untreated samples. The pre-treatment was performed under different combinations of temperature and time, ranging 150-180 °C and 5-60 min, and used as substrate in a series of batch biochemical methane potential (BMP) tests. Results were analyzed in terms of methane yield, kinetic parameters and severity factor. In all the pre-treatment conditions, methane yield and degradation rates increased when compared to untreated pig slurry. An ANOVA study determined that temperature was the main factor, and the optimum combination of temperature-time of pretreatment was 170 °C -30 min, doubling methane production from 159 to 329 mL CH4/gVSfed. These operation conditions correspond to a severity factor of 3.54, which was considered an upper limit for the pretreatment due to the possible formation of inhibitory compounds, hindering the process if this limit is exceeded.
authors: Department of Chemical Engineering and Environmental Technology, University of Valladolid, C/ Dr. Mergelina, s/n, 47011 Valladolid, Spain.
authors: L C
authors: LC
authors: Ferreira
authors: Department of Chemical Engineering and Environmental Technology, University of Valladolid, C/ Dr. Mergelina, s/n, 47011 Valladolid, Spain.
authors: T S O
authors: TS
authors: Souza
authors: Department of Chemical Engineering and Environmental Technology, University of Valladolid, C/ Dr. Mergelina, s/n, 47011 Valladolid, Spain.
authors: F
authors: F
authors: Fdz-Polanco
authors: Department of Chemical Engineering and Environmental Technology, University of Valladolid, C/ Dr. Mergelina, s/n, 47011 Valladolid, Spain. Electronic address: sarape@iq.uva.es.
authors: S I
authors: SI
authors: Pérez-Elvira
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D061249:Batch Cell Culture Techniques; D001673:Biodegradation, Environmental; D007700:Kinetics; D008372:Manure; D008697:Methane / Q000378:metabolism; D012037:Refuse Disposal / Q000379:methods*; D013227:Steam; D034421:Sus scrofa; D013696:Temperature; D013997:Time Factors
chemical_list: D008372:Manure; D013227:Steam; D008697:Methane
keywords: Biochemical methane potential; Methane yield; Pig slurry; Pretreatment; Thermal hydrolysis