Conclusion
This study paid high attention to the biogas utilization in small
size pig farms. Underutilization of the produced biogas results in
the unused biogas released to the atmosphere. Moreover, there
are almost no H2S removal units in practice, mainly due to the lack
of awareness of the H2S toxicity as well as the lack of information
of the H2S removal technologies. Apart from the current use of biogas
for cooking, to provide heat for piglet heating and, to a limited
extent, to provide direct shaft work such as the water pump, the
potential of biogas for electricity generation was considered.