Biogas usage
e. Fill the digester with a layer of hay and a layer of cow
dung.
Practical Action
f. Make sure that the hay is well stacked into the
digester. By doing this, it will be possible to stack
more hay into the digester and obtain more gas.
g. Now close the mouth of the digester with a lid
with clay (termite mound clay is very suitable for
this purpose) to make sure it does not releases
any gas. And apply cement on top of that.
h. Put about 15 cm of water (about 6” or ½ a foot)
on top of the lid. By doing this it is possible to
know if gas is leaking from the lid. (If you like you
could even grow lotus or any other water plant in
this “pond”.)
i. Connect one of the pipes in the
cylinder lid with the gas barrels with a
clear horse.
j. Use a clear horse for the other pipe and make
a “U” shape of it and fill it with water. This
can be used as a “Manometer”. If this is not
possible put the hose in a water filled bucket
(by doing this, it will be possible to know the
pressure inside the digester as well as control
it. On the other hand if the gas pressure inside
the digester suddenly increases, the excess
gas will be released from the pipe, and help
protect the digester.
In terms of the air pipes
Check the water levels in the pits that contain
the air pipes.
Check whether the barrels are floating in the water
without any problems.
Be alert to check whether gas is leaking from the
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