Why Our Food Waste May Be Our Greatest Asset
By Ruben Anderson, The Tyee. Posted July 17, 2008.
"Composting is key to reducing waste costs, cutting global warming
emissions, and increasing urban food security. "
Local composting: pick your method
Why not build a composting system that does not rely on a constant
river of oil, and start saving part of that $15 per tonne -- not to
mention lowering our greenhouse gas emissions, cutting down on
carcinogenic particulates and reducing the number of noisy trucks
waking us in the morning?
To cut back on fossil fuels, everything needs to be on a walkable
scale. This will require several kinds of composting systems, depending
on the neighbourhood density.
Many cities offer subsidized backyard composters and balcony worm bins,
and this obviously needs to continue. Nothing could be better than
closing the loop right at home -- eat food, compost scraps, spread
compost on your garden, eat more food.
The next scale up would require small apartment buildings to compost on
site. If a row of three or four backyard composters won't keep up with
the organic flow, small automatic composters use an electric heater to
accelerate composting and an auger to automatically turn the compost,
producing finished compost in two weeks.
For still larger buildings, industrial scale worm composters can really
chew through the food. The Mount Nelson Hotel in South Africa uses
worms to make short work of leftovers from the artichoke and asparagus