New portable biogas plant for domestic use
J. H. Srimal Tissera of 98/1, ‘Samantha’, Siddhamulla, Piliyandala
has invented an environment-friendly portable domestic compact biogas
plant which is very handy for household use.
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The household biogas plant |
Tissera, a past pupil of Thurstan College, Colombo who is no
scientist but an ordinary layman claims that his invention perfected
through trial and error is more sophisticated but economical than the
normal biogas unit for it uses household garbage including waste food as
feedstock rather than dung/manure. He says the starchy or sugary
feedstock used for this unit can include waste grain flour, spoilt
grain, overripe or mishaped fruit, non edible seeds or fruits, green
leaves, leftover food, paper pulp or other kitchen waste.
Only about two kilograms of raw material to obtain a daily supply of
biogas through this new system. Once the raw material is transferred
into the system, it takes only three days for the anaerobic reaction
within to be completed as opposed to 40 days with the conventional
system. It is so compact that it resembles a small refrigerator where as
a normal biogas unit which occupied about four cubic metres space in a
kitchen.
The system includes a large tank, a pipe through which the raw
material and initially the bacterial culture can be transferred to the
system, an outflow tract through which liquied compost can be obtained
as a byproduct and a gas holder on top of the tank with a pipe through
which gas can be extracted. This pipe can be connected via tubing to a
cooker to obtain an energy efficient clear blue flame.
The new system will be a great saving and subsitute for LP gas and
firewood and kerosene which release carbon dioxide to the atmosphere.
Tissera’s invention was exhibited at the Deyata Kirula exhibition in
Pallekelle last eyar by the Sri Lanka Inventors Commission.
Tissera says the biogas plant can be used in hotels, hospitals,
schools, wildlife park bungalows and security forces and police camps
and quarters as well.
Tissera who has patented his invention is looking for a state or
private sector sponsor to produce the system on a mass scale for the
benefit of the public.
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