Human waste is a wasted potential source of energy


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A concept that needn’t be limited to the Third World

Gas produced by decaying human waste is a potentially major source of energy that could provide electricity for millions of homes while improving sanitary conditions in developing countries…

Biogas is produced when bacteria break down human feces. And it would be worth the equivalent of $9.5 billion in non-renewable natural gas, the United Nations Institute for Water, Environment and Health said on Tuesday.

Residues from treated waste could yield two million tons a year of “solid” fuel worldwide that could reduce charcoal use and the number of trees being felled, which would help in global warming reduction efforts…

In low-income countries, the use of biogas could finance development

Almost a billion people around the world do not have access to toilets, about 60 percent of them in India, and have to relieve themselves outdoors…

If their waste was collected and used to produce biogas, it could generate electricity for 10 million to 18 million households and be worth $200 million to $376 million per year…

Bringing toilets to so many areas also will improve hygiene and public health in these countries. Poor sanitation is to blame for 10 percent of illnesses in developing countries, the researchers said.

“Challenges are many, but clearly there is a compelling, multi-dimensional financial case to be made for deriving energy from waste,” said Chris Metcalfe, one of the authors of the study.

Many states have a few biogas facilities constructed over bulging landfills. I’ve blogged before about at least one gigantic dairy farm that powers all its trucks with biogas from cow manure. Also another source readily available in India, for example. More important, though nations like the United States are generations away from projects like these suggested making economic sense for us – with some of the cheapest natural gas in the world – the cost of transporting natgas to India and Africa makes the concept of human-origins of biogas more than sensible. It becomes affordable.

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