A new effort aims to build a for-profit, bio-based economy in Mozambique involving rotation farming, ethanol and clean cookstoves
?| May 31, 2012?|
CLEAN STOVE: This ethanol-burning stove will cut down on the soot from charcoal burning that otherwise blackens homes and lungs.
Image: Courtesy of Novozymes
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A farmer in Mozambique grows peas, beans and cassava in rotation?enough to feed the family with a little to spare. The farmer then sells that excess to CleanStar Mozambique, which dries and packages the produce for sale in the capital, Maputo. But the company also takes the surplus cassava, a starch-filled root and local food staple, and sends it to an ethanol fermentation plant built by ICM, a U.S. ethanol company, that employs enzymes produced by Denmark-based Novozymes. The ethanol produced is then sold in reusable plastic bottles to people in Maputo who own one of the 3,000 or so ethanol-burning clean cookstoves sold by CleanStar. When the fuel runs out, more can be purchased at an incipient network of CleanStar shops.
"We want to show that there is this idea of a bio-based society," says chemical engineer Thomas Nagy, executive vice president for stakeholder relations at Novozymes, which helped start and fund the scheme. "This is not a philanthropic project."
Novozymes and its corporate partners hope to create a bio-based, sustainable economy in Mozambique. Such an economy could point the way to reducing the two million annual deaths worldwide that result from breathing in smoky indoor air caused by burning charcoal. Currently, charcoal is the fuel of choice in much of the world and a nearly $10-billion market across sub-Saharan Africa. That is the market this ethanol-burning cookstove?and bio-based economy?aims to disrupt.
"Ethanol burns very clean," Nagy notes. The CleanStar venture opened its first ethanol production plant on May 17 in Dondo, capable of brewing two million liters of fuel per year. "Charcoal might be cheaper but it has less energy content per kilo[gram]."
The problem in this case is: replacing cheap charcoal, which farmers make by cutting down and burning trees, requires dependence on a much more complex, new and unproved system. "People use charcoal because it is cheap and easy," notes a prominent development expert who declined to be identified because of relationships with various clean cookstove donors and providers. "Ethanol is neither."
Food and fuel
The first step in this new process will be convincing farmers to halt charcoal production and slash-and-burn agriculture in favor of a new rotation system. Mozambican farmers currently grow corn and cassava, among other crops. But under the new system, they would grow nitrogen-fixing beans and peas along with staple or cash crops such as cassava, ground nuts, sorghum and soybeans in rotation in fields ringed by trees newly-planted to prevent erosion. "We have enrolled between 500 and 600 farmers today," Nagy says, and the project aims for at least 3,000 by next year. The CleanStar venture also provides each farmer with fertilizer and pesticides as well as technical assistance.
As a result of the new rotation system and improved soil fertility, farm family nutrition improves (44 percent of Mozambican children are stunted due to malnutrition and disease) and income can more than quadruple, according to Nagy. Selling the excess to city dwellers will improve their nutrition as well?and cut down on food imports. The excess cassava, also known as tapioca when dried to a powder, will be turned into a fuel to vie with charcoal and, in a bid to ensure that the staple crop does not end up being diverted from hungry stomachs to stoves, CleanStar will pay less than the crop's price as food.
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