Biodigesters in Kenya

Standard: GS      Technology: Biodigesters      Location: Kenya

With the majority of Kenyans using firewood, charcoal or kerosene to meet their energy needs, this project offers a clean and sustainable alternative to fossil fuels – biogas. Biodigesters are installed at household level, generating gas from anaerobically digested animal manure and solving the problem of managing unhygienic animal waste, while enabling families to cook with a smoke-free fuel. The digesters also produce slurry – a rich fertiliser comprised of manure and water – that can be used to promote soil health. In addition to multiple health benefits, the biodigesters save families money and time, as well as cutting 4.2 tonnes of CO2 each annually.

Delivering against the Global Goals

Families save money on fuel for cooking and fertiliser for their fields.

The biodigesters significantly decrease indoor air pollution by eliminating the need for smoky fuels.

Women have cleaner cooking environments and spend less time collecting fuel.

The project has catalysed a biodigester market in Kenya, prompting the creation of 100 biodigester construction companies. It also helps farmers to boost their yields and profits.

Each biodigester reduces 4.2 tonnes of CO2 emissions annually.

Lowering wood fuel consumption reduces pressure on local forests and biodiversity.

Case Study: Nahason Nyaga, retired teacher and smallholder farmer

Nahason Nyaga was one of the first farmers in Kenya to have a biodigester installed on his land. He no longer needs to buy petroleum or wood fuel. He bought the biogester by taking out a small loan, subsidised by carbon finance, and paid it back through the cost savings he made on fuel. Nahason also uses the bioslurry as fertiliser, channelling it directly from the digester to his vegetable field, where it provides valuable nutrients for the soil, helping to improve the health and resilience of his crops.