1.
Environ Technol
; 28(10): 1145-51, 2007 Oct.
Artigo
em Inglês
| MEDLINE
| ID: mdl-17970521
RESUMO
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.