Made from manure or food waste and sold in cylinders, the chemical treatment process removes dirt and increases the purity of the biogas to 98%. This makes the gas highly efficient. Khainza is currently processing 800 kg of waste every week, producing 100 kg of high quality biogas.
The biogas is sold in a 6 kg and 13 kg cylinders which lasts 120 and 250 hours respectively. It costs less than a bag of charcoal to refill the 6 kg cylinder, and lasts as long. Biogas is also 35% cheaper than liquefied petroleum gas (LPG), because all the raw materials are locally sourced.
Up to 94% of Ugandans use firewood and charcoal for cooking. Charcoal prices have risen by 68% since 2000 and are expected to double again in the next 10 years. Woniala recalls his mother chopping firewood every day to cook for him and his siblings, inspiring him to develop Khainza Energy Gas, which is named after her.