Page 18 - Primary Seven Notes
P. 18
Uses of the parts
Inlet pipe is for putting the plant residues and animal
wastes into the digester
Emptying tank is where the used up matter is col-
lected and removed then taken to the gardens as
manure.
Digester is where decomposition or fermentation
by the help of bacteria takesplace. Water is added in¬
to the digester to speed up the rate of decomposi¬
tion.
Gas outlet traps the biogas and directs it to where it is
needed for use.
Advantages
1. Biogas burns cleanly, and produces fewer pollu¬
tants during cooking thanany other fuel except
electricity.
2.Biogas provides heat immediately whenever it is lit no
waiting time is required.
3. Raw materials used can be easily got from the
environment
4. Biogas can be used for lighting as well.
5. The by-product (slurry) from the digester can be used as
fertilizer.
6. Biogas is a renewable fuel.
