Almost every time you eat, you dispose of rubbish consisting of either peels, fruit cores, crusts, ends, seeds, shells, etc. When you mow your lawn, you produce grass clippings. Wouldn’t it be nice to put all that to some use?
Using anaerobic digestion, these materials can be decomposed to produce useful substances, including (but not limited) to biogas, which contains methane, carbon dioxide, and other gases. Methane is a renewable, highly energy dense (55.5 MJ/kg, or 15.4 kWh/kg), and relatively clean fuel which can power various types of heaters and electricity generators.
BC Bioenergy Network, which works with organizations keen to pilot and demonstrate new technologies, has proudly announced that Harvest Power has officially switched on a plant which generates this biogas using grass clippings and kitchen waste from Metro Vancouver. It is called The Energy Garden. It is located in Richmond, BC, and is now North America’s largest anaerobic digestion plant.
Soil and mulch loading ramp at The Energy Garden.
Image Credit: Harvest Power.
Annually, it can convert up to 40,000 tonnes of apple cores, pizza crusts, and grass clippings into useful products, reducing greenhouse gas emissions by approximately 10,255 tonnes.
This plant generates enough electricity to power 900 homes per year, plus, it provides hundreds of thousands of tonnes of soil for farms and gardens. To put the cherry on top, it burns the methane that would otherwise have been released into the atmosphere if the garbage went to landfills. Methane’s greenhouse effect is 20 times greater than that of carbon dioxide!
Could a power plant be any more resourceful than that? Maybe, but this is hard to beat.
The Energy Garden was recently added to KMPG’s list of 100 leading global industrial projects.
I don't like paywalls. You don't like paywalls. Who likes paywalls? Here at CleanTechnica, we implemented a limited paywall for a while, but it always felt wrong — and it was always tough to decide what we should put behind there. In theory, your most exclusive and best content goes behind a paywall. But then fewer people read it! We just don't like paywalls, and so we've decided to ditch ours. Unfortunately, the media business is still a tough, cut-throat business with tiny margins. It's a never-ending Olympic challenge to stay above water or even perhaps — gasp — grow. So ...
Sign up for daily news updates from CleanTechnica on email. Or follow us on Google News!
Have a tip for CleanTechnica, want to advertise, or want to suggest a guest for our CleanTech Talk podcast? Contact us here.
