Biogas is a combustible gas produced during decomposition of organic material by bacteria in anaerobic (absence of air) condition. Biogas is composed of about 70 percent methane and 25 percent carbon dioxide (CO2) and some traces of hydrogen sulphide and moisture. It is clean and renewable.

Biogas Raw Materials

Raw materials used in the biogas digester to produce methane gas include animal dung, poultry droppings, plant waste, sewage, industrial organic waste and domestic waste (vegetables, waste food)

Uses Of Biogas

Cooking and heating through use of stoves and burners, lighting, generation of electricity (driving a generator which produces electricity) and production of rich organic fertilizer.

Advantages Of Biogas Energy

Biogas burns rapidly and it is affordable particularly for disadvantaged communities, reduces deforestation because people will not cut down trees for use as firewood and helps in waste management.

REF builds institutional biogas digesters on 100 percent capital subsidy, just like the case with grid electricity infrastructure were beneficiaries do not pay but are required to provide feeding into the digester if it’s not connected to sewer system.

With regards to domestic biogas digesters and others outside the aforementioned, prospective beneficiaries are encouraged to approach our nearest provincial offices and get free quotations as well contact details for builders.

REF has trained 206 biogas builders countrywide and is continually training more, to allow villagers who need the technology at their homesteads, farms and villages to get help at local areas. Biogas builders are trained for free but they charge fees agreed between them and the prospective beneficiary.

Status on Biogas Digester Plants as at 31 March 2020

Mashonaland Central
Mashonaland West
Matabeleland North
Matabeleland South
Mashonaland East

Includes the 1 Commercial biogas digester plant at  Kotwa in Mudzi District 


Includes the 2 Commercial biogas digesters plant at Mimosa Mine in Zvishavane District &Unki Mine in Shurugwi District.


Includes one Commercial biogas at HIT completed in October 2017