Is Sewage an Untapped Energy Source?

  • Who would've thought that sewage could produce electricity? The University of Toronto's David Bagley did. (photo by Davide Gugliemo)

A Toronto researcher says most communities are underestimating a potential source of cheap electricity – raw sewage. The Great Lakes Radio Consortium’s Karen Kelly reports:

Transcript

A Toronto researcher says most communities are underestimating a potential source
of cheap electricity – raw sewage. The Great Lakes Radio Consortium’s Karen Kelly reports:


University of Toronto professor David Bagley collected waste water at a North
Toronto water treatment plant. He took the sewage into his lab, dried it and
then burned the solids to see how much energy they produced. He estimates the
energy produced from sewage at three treatment plants could produce more than
100 megawatts of electricity. That could be enough to keep a small town going
for a year. But Bagley says few take advantage of this resource.


“Our measurements show that there’s enough energy that we should be able to
completely offset the electricity needed to run the plant, and have extra
left over the send back to to the grid.”


Bagley finds communities are reluctant to invest in the equipment they’d
need to convert sewage into power. But he’s hoping to to design a cheaper
and more efficient system so more people can get the most out of their sewage.


For the Great Lakes Radio Consortium, I’m Karen Kelly.

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Socially Responsible Investing Catches On

The amount of money invested in so-called socially responsible mutual funds continues to grow. But as the Great Lakes Radio Consortium’s Bill Poorman reports, they’re still a small part of the big picture:

Transcript

The amount of money invested in so-called socially responsible mutual funds continues to grow.
But as the Great Lakes Radio Consortium’s Bill Poorman reports, they’re still a small part of the
big picture:


A report from the trade group the Social Investment Forum says holdings in socially responsible
mutual funds grew by eleven percent over the last couple of years. The amount now stands at
151 billion dollars. Todd Larsen is a spokesperson for the Forum. He says the industry has
grown dramatically since the group first added up the investments eight years ago.


“In our first report, we found there were 12 billion dollars in assets in socially responsible mutual
funds.”


Larsen says socially responsible funds have a variety of approaches. Some screen out entire
sectors of the economy.


“For example, perhaps, the oil industry might be screened out. In other funds, they’re doing a
best of class approach. So they’ll look at each industry and see which companies are the best within
that particular industry, and they’ll hold those companies.”


Even with the growth, socially responsible mutual funds are still only a tiny percentage of the
trillions of dollars invested in all funds.


For the Great Lakes Radio Consortium, I’m Bill Poorman.

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