Page 19 - Primary Seven Notes

Disadvantages

 High costs of constructing the digester, tubes, gas stove,

and pots.

 Biogas can increase the workload of people as it is

often made their task to runthe digester. It is quite

a physical burden to move all the biomass feed¬

stock andwater to feed the digester. Also the slurry

must be removed and taken to the field.

 It is not viable for elderly or sick people to run a

biogas plant on their own, ifthey don't have la¬
bour to assist them in the maintenance of the di¬

gester.

 Installations (depending on material and

location) must be protected against theft

and damages. Especially metal tubes are

a valuable good and often proneto

theft.

 Cultural rules might not accept

the handling of dung or faeces

and their use asfuel for cook¬

ing.

 Biogas is difficult to store

and to transport to other Bio

consumers.