Unlike other renewable fuels such as biodiesel and
bioethanol, biogas production is relatively simple and can
operate under any conditions and is not monopolistic
(Kalia et al. 1992; Kapadi et al. 2004). Dung is a potential
substrate for biogas production, seen only as a floor polish
and fertilizer in the garden for hundreds of years. Biogas
for rural energy is sustainable, affordable, and has no
negative effect on people’s health or the environment, if
handled properly (Khandelwal & Mahdi 1986; Kumar &
Jain 1988). Complicated construction, difficult operation
of the systems, high investment, and maintenance costs
have pushed farmers to adopt cheaper and simpler anaerobic
systems (Mittal 1996).
There are currently more than 30 million household
digesters in China, followed by India with 3.8 million, 0.2
million in Nepal, and 60,000 in Bangladesh (MNES Report
Unlike other renewable fuels such as biodiesel andbioethanol, biogas production is relatively simple and canoperate under any conditions and is not monopolistic(Kalia et al. 1992; Kapadi et al. 2004). Dung is a potentialsubstrate for biogas production, seen only as a floor polishand fertilizer in the garden for hundreds of years. Biogasfor rural energy is sustainable, affordable, and has nonegative effect on people’s health or the environment, ifhandled properly (Khandelwal & Mahdi 1986; Kumar &Jain 1988). Complicated construction, difficult operationof the systems, high investment, and maintenance costshave pushed farmers to adopt cheaper and simpler anaerobicsystems (Mittal 1996).There are currently more than 30 million householddigesters in China, followed by India with 3.8 million, 0.2million in Nepal, and 60,000 in Bangladesh (MNES Report
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