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Ever volatile fuel prices, security of supply, renewable energy cost reductions and environmental-climate concerns are dramatically accelerating the demand for greener alternatives.

It has become a global imperative that we break our addiction to fossil fuels. Providing for the ever increasing energy and transportation needs of the planet is going to take a wide range of alternative energy sources, cleaner fuels, the smart grid and advanced storage solutions.

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« Big Help in Biofuels … | Home | Toward a greener econ… »

City Trash Plus Farm Leftovers May Yield Clean Energy

12 10 08 - 06:15 City Trash Plus Farm Leftovers May Yield Clean Energy




Washington - Tomorrow's household garbage might be blended with after-harvest leftovers from fields, orchards, and vineyards to make ethanol and other kinds of bioenergy. Agricultural Research Service (ARS) scientists are investigating this straightforward, eco-friendly strategy in their laboratories at the agency's Western Regional Research Center in Albany, Calif. Washington - Tomorrow's household garbage might be blended with after-harvest leftovers from fields, orchards, and vineyards to make ethanol and other kinds of bioenergy. Agricultural Research Service (ARS) scientists are investigating this straightforward, eco-friendly strategy in their laboratories at the agency's Western Regional Research Center in Albany, Calif.

In most instances, agricultural wastes like rice straw, almond hulls, and the oversize outer leaves of iceberg lettuce will have to be pretreated before being used as a bioenergy resource. That's according to Kevin Holtman, an ARS research chemist who's working out the details of the garbage-to-gas approach.

The garbage, known as "municipal solid waste," or "MSW," would also be pretreated, Holtman noted.

The garbage would be processed in a jumbo-size autoclave, a device which acts something like a giant pressure cooker to convert the MSW into grey, lightweight clumps. The pretreated agricultural wastes and autoclaved MSW would then be transferred to a biofermenter. Yeasts and enzymes would be added, to make ethanol.

Holtman and colleagues David Bozzi, an engineering technician, and Diana Franqui, a microbiologist, are determining the best ways to use just water and heat, instead of hazardous chemicals, to pretreat the farm wastes, thus keeping the biorefining process environmentally friendly.

The team, part of the Bioproduct Chemistry and Engineering Research Unit at the Albany research center, is collaborating in the research and development venture with Comprehensive Resources, Recovery and Reuse, Inc., or "CR3," of Reno, Nev., and with the Salinas (Calif.) Valley Solid Waste Authority.

Besides producing biofuels, the biorefinery would also reduce the volume at landfills and minimize the need for new ones. Used tags: , , , , , , , , , , ,

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Toward a greener economy

Friday 17 October 2008 at 2:55 pm Toward a greener economy




By Moises Velasquez-Manoff





New York - Market bubbles occur when goods are traded at prices that greatly exceed real value. They burst when they grow so bloated that they become unstable. The current economic turmoil, widely viewed as the worst since 1929, is one example of what can happen when the difference between market value and actual value becomes too great.

Environmentally minded economists have long warned that equally burstable ecological bubbles can occur if humanity lives beyond earth's capacity to regenerate. The problem, they say, is that we're addicted to economic growth. Mainstream economics assumes that the economy, the engine of modern civilization, can grow perpetually. more

City Trash Plus Farm Leftovers May Yield Clean Energy

Sunday 12 October 2008 at 06:15 am City Trash Plus Farm Leftovers May Yield Clean Energy




Washington - Tomorrow's household garbage might be blended with after-harvest leftovers from fields, orchards, and vineyards to make ethanol and other kinds of bioenergy. Agricultural Research Service (ARS) scientists are investigating this straightforward, eco-friendly strategy in their laboratories at the agency's Western Regional Research Center in Albany, Calif. more