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human feces used as biogas


Was machen Sie?
Human Feces Powers Rwandan Prison

By Cyrus Farivar

Story location:,2782,68127,00.html

02:00 AM Jul. 16, 2005 PT

Imagine eating food that was cooked using natural gas generated from your own human waste. Thousands of prisoners in Rwanda don't have to imagine it -- they live it.

Prisoners' feces is converted into combustible "biogas," or methane gas that can be used for cooking. It has reduced by 60 percent the annual wood-fuel costs which would otherwise reach near $1 million, according to Silas Lwakabamba, rector of the Kigali Institute of Science, Technology and Management, where the technology was developed.

Last month, the Rwandan prison biogas facilities received an Ashden Award for sustainable energy. The award, which comes with a prize worth nearly $50,000, is given by the Ashden Trust, a British charity organization that promotes green technologies.
"It's turning a negative social situation in terms of the Rwandan genocide into something that can benefit local people in the local area," said Corrina Cordon, spokeswoman for the Ashden Awards.

Many of Rwanda's 120,000 prisoners are incarcerated because of the genocidal campaign. The prisons are overcrowded by a factor of 10, Lwakabamba said.

He added that prison overpopulation has created a situation where the facilities have significantly increased energy needs. The overcrowding also leads to large amounts of human waste that the prisons cannot adequately process.

Lwakabamba said that prior to the construction of biogas facilities at a prison situated atop a hill at Cyangugu in southwestern Rwanda, some human waste was being thrown down the hill, near natural bodies of water such as Lake Kivu.

"It got started when we went to these prisons and we realized that so much human waste was going into these rivers and we had to try something," he said.

The university rector said that the Rwandan biogas facilities, which are currently in half of the 30 prisons around the country, now contribute half of the energy needs for cooking and lighting in each location.

Rwanda's biogas facilities are among the most ambitious in the world, given their size and scope. They range up to 1,000 cubic meters in something resembling a beehive shape.

The process requires putting a given amount of human or other animal waste into a "digester," which ferments it using bacteria to release methane gas that can be captured and then burned as fuel. Attached is a "compensating chamber" that replenishes the supply of bacteria to keep the operation self-sustaining.

The lead engineer on the project, Ainea Kimaro, says that within four weeks, 100 cubic meters of waste can be transformed into 50 cubic meters of fuel.

Biogas is being used around the world, including in homes in Nepal and to power trains in Sweden.
now i know where the expression holy shit! comes from, we could save billions! we need this. LOL i want one damnit!
Mmmm. Shit flavored burgers anyone? Thats what they get for getting into jail

Brings a whole new meaning to "throw another log on the fire", now doesn't it?