BIOGAS FERTILIZER PROUCED FROM SHEEP AND CATTLE MANURES

Abstract

Fertilizer was produced under anaerobic fermentation from sheep and cattle manures using a conventional digester under semi-constant diurnal ambient temperature. Sheep manure from the lower layer of the bed (floor) of a sheep housing (1.55 % TS) was used in a digestion experiment that lasted for 8 days under mesophilic temperature (32.4oC) and screaned sheep manure from the upper layer of the bed of the sheep housing (6.79 % TS), as used in a digestion experiment that lasted for 12 days under mesophilic temperature (32 oC). Cattle manure (8 % TS) was used in a digestion experiment that lasted for 69 days under psychrophilic temperature (19.2 oC). The results concluded that efficiency of anaerobic digestion in case of the lower layer of the bed of the sheep housing is greater than that of the upper layer as degradation in TS in case of cattle manure was 20 % and the long time of digestion (69 day) did not compensate for the decrease in temperature digestion (19.2 oC).