Building a Methane-Fueled Fire: Innovation of the Week
by borderjumpers, Thu Jan 28, 2010 at 12:52:46 PM EST
Cross posted from Nourishing the Planet.
For half the world’s population, every meal depends on an open fire that is fueled by wood, coal, dung, and other smoke-producing combustibles. These indoor cookfires consume large amounts of fuel and emit carbon dioxide and other dangerous toxins into the air, blackening the insides of homes and leading to respiratory diseases, especially among women and children.
Biogas, however, takes advantage of what is typically considered waste, providing a cleaner and safer source of energy. Biogas units use methane from manure to produce electricity, heat, and fertilizer while emitting significantly less smoke and carbon monoxide than other sources of fuel. Access to an efficient, clean-burning stove not only saves lives—smoke inhalation-related illnesses result in 1.5 million deaths per year—it also reduces the amount of time that women spend gathering firewood, which the U.N. Development Programme (UNDP) estimates is 10 hours per week for the average household in some rural areas.
The IFAD-funded Gash Barka Livestock and Agricultural Development Project (GBLADP) helped one farmer in Eritrea, Tekie Mekerka, make the most of the manure his 30 cows produce by helping to install a biogas unit on his farm (similar to the unit that Danielle saw in Rwanda with Heifer International). Now, says Mekerka, “we no longer have to go out to collect wood for cooking, the kitchen is now smoke-free, and the children can study at night because we have electricity.”Additionally, Mekerka is using the organic residue left by the biogas process as fertilizer for his family’s new vegetable garden.
In Rwanda, the government is making biogas stove units more accessible by subsidizing installation costs, and it hopes to have 15,000 households nationwide using biogas by 2012. While visiting with Heifer Rwanda, Danielle met Madame Helen Bahikwe, who, after receiving government help to purchase her biogas unit, is now more easily cooking for her 10-person family and improving hygiene on the farm with hot water for cleaning. In China, IFAD found that biogas saved farmers so much time collecting firewood that farm production increased. In Tanzania, the Foundation for Sustainable Rural Development (SURUDE), with funding from UNDP, found that each biogas unit used in their study reduced deforestation by 37 hectares per year. And in Nigeria, on a much larger scale, methane and carbon dioxide produced by a water purifying plant is now being used to provide more affordable gas to 5,400 families a month, thanks to one of the largest biogas installations in Africa.
To read more about how waste can be turned into a source of fuel, energy, and nutrition see: Making Fuel Out of Waste, Growing Food in Urban “Trash,” ECHOing a Need for Innovation in Agriculture, Keeping Weeds for Nutrition and Taste, and Vertical Farms: Finding Creative Ways to Grow Food in Kibera.
If you know of other ways people are making the most of their waste and would like to share it with us, we encourage you to leave a comment or fill out our agriculture innovation survey here
Tags: africa, Agriculture, carbon sequestration, Climate change, fertilizer, fuel, innovation, Innovation of the Week, Poverty, rwanda, State of the World 2011, Stove, Survey, waste, carbon (all tags)