Construction of a fixed-dome digester requires skilled labor. For many good reasons the production of biogas is highly promoted in tropical regions, and therefore many qualified masons are needed. The LMMC project supported two trainings in digester construction. Click on the picture to open the picture report of a training in Malawi.
Biogas contains about 65% methane, a powerful greenhouse gas, which is formed during the decomposition of biomass in an oxygen-free environment. Livestock manure is biomass. And since bio-digestion does not alter the nutrient content, the bio-slurry, the coproduct of bio-digestion, remains a perfect organic fertilizer. To ease handling and transport many smallholder farmers prefer to compost the often rather liquid bio-slurry.
The benefits of biogas are diverse. For family use, biogas substitutes for fossil or biomass fuel, thus saving time and money. Non-oil producing countries save on foreign currency for fuel imports. And government targets on the mitigation of greenhouse gases become easier within reach.