Conclusions
Food waste is a very good substitute for L P G gas because
India is self-reliant in food production and crude oil is
imported.
A regular feeding of biogas plant with proper amount
will ensure consistent release of biogas and ensures
uninterrupted production of gas.
Even if the plant is not fed for one or two days,
(Saturday and Sunday in a school), the efficiency of the
plant is not affected.
Crushed and blended food improves the liberation of
biogas as digestion becomes easy.
Underfeeding or overfeeding of plant should be
avoided. Underfeeding keeps the plant inefficient and
overfeeding increases the Ph value of food waste and
reduces the development of microbes.
The payback period is small. Hence affordable in
schools and small canteens.
The local distribution system in any small location
between plants and hotels ensures continuous supply of
food waste with an added advantage of reduction in
environmental hazards.
Food provided under mid-day meal is simple and
mostly rice so a simple single stage digestion process is
sufficient and effective.
Schools have ownership and complete stake in the
plants hence are more responsible for its working as was
seen in household level plants.