title: Stabilization of swine wastes by anaerobic digestion.
abstract: The purpose of this study was to evaluate the efficiency of the anaerobic digestion to reduce the organic load of swine waste. Anaerobic digestion is a biological means of decomposition of manure in an oxygen-free environment, and has the advantage of producing a fuel gas (methane) and an odor-free residue rich in nutrients, which can be used as fertilizer. The experiments were carried out in laboratory scale batch digester, at temperature controlled at 35 +/- 2 degrees C, without agitation. The digester was fed with 5% and 15% manure slurry. Results showed an average reduction of TCOD of 58% and DCOD of 85%. The methane content of biogas varied from 55 to 65% and stabilized sludge presented characteristics for use in agriculture.
authors.affiliation: Department of Chemical Engineering, State University of Maringá, Av. Colombo, 5790, Bloco E46-09, 87020-900, Maringá--PR, Brazil.
authors.forename: R D
authors.initials: RD
authors.lastname: Costa
authors.forename: C R G
authors.initials: CR
authors.lastname: Tavares
authors.forename: E S
authors.initials: ES
authors.lastname: Cossich
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D007220:Industrial Waste; D012722:Sewage; D013552:Swine
chemical_list: D007220:Industrial Waste; D012722:Sewage