Have a question? Here is a list of Frequently Asked Questions (FAQs) about our Biogas products and services.
Biogas is a renewable energy source produced when organic materials such as animal waste, crop residues, food waste, or sewage are broken down by bacteria in an oxygen-free (anaerobic) environment.
Biogas typically contains 60–70% methane (CH₄), 30–40% carbon dioxide (CO₂), and small amounts of hydrogen sulfide (H₂S), ammonia, and water vapor.
Biogas is produced through anaerobic digestion, a natural process where microorganisms decompose organic matter in the absence of oxygen.
Cow dung and other animal manure
Poultry waste
Crop residues and plant waste
Kitchen waste and food scraps
Sewage and organic industrial waste
Cooking and heating
Generating electricity
Fuel for vehicles (after purification)
Lighting (biogas lamps)
Provides clean renewable energy
Reduces reliance on firewood and fossil fuels
Produces organic bio-slurry, a nutrient-rich fertilizer
Reduces greenhouse gas emissions
Helps manage waste efficiently
Bio-slurry is the leftover organic material after gas production. It’s an excellent organic fertilizer that improves soil fertility and crop yield.
Fixed-dome digesters (popular for small farms)
Floating-drum digesters
Plug-flow digesters
Bag or balloon digesters (affordable for small-scale use)
Roughly 25–30 kg of cow dung can produce 1 cubic meter of biogas per day, enough for cooking for a family of 4–5.
Usually 2–4 weeks after feeding the digester for the first time, depending on temperature and substrate.
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Feed it regularly with a balanced mix of waste and water
Avoid non-digestible materials (plastics, metals, sand)
Maintain consistent temperature
Clean gas outlets to avoid blockages
Low gas production (due to poor feedstock or cold temperature)
Gas leakage
Scum formation or clogging
Incomplete digestion
In Kenya, small household biogas units range from KSh 60,000 – 250,000, depending on size and materials.
Typically 2–4 years, depending on gas use and cost savings on firewood, LPG, or electricity.
Yes. With proper purification and compression, biogas can be upgraded to biomethane and sold as vehicle fuel or electricity.
It reduces methane emissions from waste, prevents deforestation, minimizes pollution, and provides sustainable waste management.
Yes. When handled properly, it’s safe. Biogas is lighter than air and disperses quickly, making it less likely to cause explosions.
Yes, but performance may drop in cold temperatures. Insulation or heating systems can be added to maintain optimal digestion.
Absolutely. It provides reliable energy and promotes environmental education, sanitation, and sustainability.