Incorrect operation of the system and failure to
maintain or repair it.
♦ High incremental cost in using biogas as renewable
energy for running generators, gas cleaning
equipment, and evaporation systems on the farm.
♦ Complicated processing in selling surplus electricity
to EGAT.
4. Deep pond: This method causes more serious
environmental problems like bad odours and insect
infestation compared to the others. Therefore, the local
government has had to enforce protective environmental
regulations to address these threats. In this
method, the farmers dump the waste into a pond and
leave it for years. Only the dry manure around the
edge of the pond can be used or sold as fertilizer unlike
in the organic fertilizer method where the farmers
invest in labour and building a platform to dry all the
solid waste. So, the farmers who use the deep pond
method gain a very small amount of benefit compared
to those who invest fully in converting solid pig waste
to fertilizer and earn much bigger cash returns.