1. What is biogas?
Biogas is combustible gas produced from anaerobic digestion of organic (crop, animal and human waste) in the absence of oxygen. Ever seen bubbles rising from a swampy marshy area? Then that’s naturally produced methane gas. The gas is a mixture of 60% methane (CH 2) and 40% Carbon dioxide (CO2).
2. What is a biodigester?
The biogas digester is a sealed container or chamber that is specially built to provide the suitable conditions for anaerobic bacteria for the production of biogas.
3. Who can install a biogas digester?
Small scale farmers who keep dairy cows, at least 2 or more – and penned, are good candidates for installing household biogas units. However, a biogas unit will only yield good results if it is properly planned, constructed, operated and maintained. Regular supply of water and dung in required ratio is essential for operation of biogas plants.
4. Is biogas dangerous?
Biogas is quite safe, unlike the other gases it is non volatile; it does not explode since it’s not stored under pressurized gas cylinders.
5. What information is required to design and build a biogas digester?
- Family size and daily cooking (and lighting) requirements.
- Availability and amount of feedstock (water, number and type of cows)
- Materials available on site (bricks, etc) for construction of digester.
6. What is Biogas used for?
Biogas is used for cooking and lighting. It is a renewable energy that is environmental friendly and safest as compared to other fossil fuel gases.
Biogas also produces a digested biomass which is an enriched organic fertilizer for improved agricultural production. Bio-slurry is also used in fish farming as fodder.
7. What is the cost of construction?
The cost of construction depends on the prevailing prices of construction materials and appliances. Costs also vary depending on the size of the plant under construction. A flat subsidy is offered for all plant sizes.
8. Is there any credit arrangement?
In each of the six countries, the implementing agencies are developing partnerships with several credit agencies engaged in financing biogas construction. In some countries, like Kenya and Ethiopia, credit is available to farmers and several households have made use of the arrangement so far.
10. Can any mason construct a biogas plant?
No. Biogas masons are identified and trained by respective national implementing agencies on how to construct viable biogas plants. All plants constructed under the ABPP undergo quality control and have a fixed period guarantee hence the need to use specially trained biogas masons.