Efficacy of Biogas Production from Different Types of Livestock Manures

Abstract

This study aimed to identify the efficacy of biogas production from different types of livestock manures at anaerobic condition. Three types of manures such as cattle manure (T 1 ), goat manure (T 2 ) and poultry manure (T 3 ) were selected for this purpose. Each treatment was replicated in 3 biogas reactors and a total of nine biogas reactors were installed in a warm water bath at 37° C temperature. It was found from the experiment that T 2 produced the maximum biogas among the three treatments, intermediate production was found from T 1 and the lowest production was found from T 3 . The differences were statistically significant at different treatment groups (P<0.05). Maximum biogas production occurred within 20 days of anaerobic fermentation and the gas production gradually decreased up to 60 th day of fermentation in T 1 and T 2 . But in T 3 , the minimum gas production was found at 30 th day and then it was gradually increased up to 60 th day. Total methane production was also higher in T 2 in comparison to T 1 and T 3 and the difference was significant at 5% level of probability (P<0.05). Finally, it may be concluded from the experiment that T 2 (goat manure) is more suitable for biogas and methane production compared to T 1 (cattle manure) and T 3 (poultry manure).