Biodigesters produce valuable biogas that can be used as fuel for lighting and cooking, reducing
costs on conventional energy or time needed to collect firewood. In particular, health standards in
lighting and cooking devices are improved due to avoided indoor pollution, such as emissions of
smoke, soot and other harmful substances. With the use of biodigesters, value can be generated
from animal manure, human excrements and agricultural residues, increasing income and providing
incentives to improved hygiene. As a by-product of the fermentative process, odourless bio-slurry
can be used as fertilizer, closing the nutrient cycle and reducing the need for conventional fertilizer.
For larger scale applications, the biogas can be used to run a power unit, generating carbonneutral
electricity.