discharges during landfill, with unsteady burning, resulting in dioxin production during incineration [1].
Considering the high moisture and organic content, these wastes should better be treated in biological
treatment like anaerobic digestion than other techniques such as incineration and composting [2].
Garbage and manure from livestock for methane fermentation have been wide studied. However
manure is known to have a poor methane yield and it is not common to use manure as only substrate for
biogas production. Methane production of cattle manure is low, normally in range of 30-43% yielding
150-240 l CH4/kg-volatile solid (VS) [3].The feasibility to increase the biogas production from manure is
to co-digest it with other organic waste such as garbage from household. The main advantage of co-digest
technology are improved methane yield because the supply of additional nutrients for co-digest substrates
and more efficient use of single accommodation [4]. Co-digestion of swine manure (SM), dairy cattle
manure (DSM) showed much lower volatile total solid (VTS) digestion efficiency and methane yield than
that of garbage, while DCM showed the worst performance [5].
The aims of this research were to determine the effects of vegetable loading rate of 0.5 kg and 1.0 kg
per week on biogas production under mesophilic conditions. Then the most applicable loading rate was
studied by considering the effect yield from alter percentages of dog manure to cattle manure at 10 wt%
and 20 wt%.