Month: March 2010

“Nom nom nom” Says the Cement

- Adam Clare

Our good friend algae is at it again and is cleaning smokestacks!

A mixture of hot gas rises out of a flue stack at the St. Marys Cement plant about 50 kilometres west of Waterloo. But not all the CO2-rich exhaust is vented to the open air.

Some is redirected through a 15-centimetre thick pipe connected to the side of the stack. The pipe carries the gas into a high-tech facility where a species of algae from the neighbouring Thames River uses photosynthesis to absorb the carbon dioxide and release oxygen in return.

“It’s a small model of what a big full-scale facility could be,” says Martin Vroegh, environment manager with St. Marys Cement Inc., headquartered in Toronto. The algae project, which went live last fall, is believed to be the first in the world to demonstrate the capture of CO2 from a cement plant.

The idea, Vroegh explained, is to turn CO2 into a commodity rather than treat it as a liability. The CO2-consuming algae will be continually harvested, dried using waste heat from the plant, and then burned as a fuel inside the plant’s cement kilns. Alternatively, the green goop can be processed into biofuels for the company’s truck fleet.

Keep reading at The Star.

Thanks Mike!

C’est What? Vegetable Oil!

- Adam Clare 1 Comment

A restaurant in downtown Toronto has converted their deep fryer into a more efficient model and use the waste oil from the fryer to fuel a car. Neat!

Since installing the new deep fryer in late January, Broughton says his vegetable oil use has been cut in half and the amount of gas to run the fryer has been drastically reduced.

“The fryer is supposed to use 40 per cent less gas, but we’re still assessing exactly how much we’re saving. Just from the lower vegetable oil use, I’m saving $80 a week, about $4,000 a year. My waste used to be about 100, 110 litres a week. Now it’s about 50 litres a week. Angelo now takes pretty much all of our used oil for his car.”

Rigitano says the only problem he has had so far with the car is when he took it to be serviced.

“My mechanic started laughing. He said, ‘I’m getting hungry.’ ”

Fact: According to Natural Resources Canada, North Americans produce 5 to 6 kg per person of trap grease removed from commercial cooking operations each year and another 3 to 5 kg of cleaner used cooking oils. Converting this could produce almost 2.5 billion litres of clean diesel a year, worth about $2 billion.

Read the full article at The Star.

Thanks Kathryn!

$3 Wound Healing Device Saving Lives in Haiti

- Adam Clare

A student at MIT has created a device that helps people heal after severe wounds that costs a fraction of what commercial options cost. The device is a portable version of the negative-pressure devices that accelerates wound healing and reduces the frequency that bandages need to be changed. Commercially available devices cost about $100 and require a lot more energy than the MIT designed $3 device.

Negative-pressure devices, which act like a vacuum over the bandaged wound, have become a central part of wound therapy in the United States over the last decade. They speed healing up to threefold, depending on the type of wound, and in some cases eliminate the need for plastic surgery or skin grafts. A number of commercial versions are available in the U.S. and are used to treat burns and chronic wounds such as bed sores or diabetic foot ulcers. While scientists don’t exactly know why this treatment accelerates the healing process, it likely helps by removing some of the fluid and bacteria that accumulates at the injury site and by increasing blood flow to the wound. The pressure itself may also help healing by bringing together the edges of the wound and delivering mechanical pressure, which has been shown to spur cell growth, says Dennis Orgill, a surgeon at Brigham and Women’s who was not involved in the project.

Existing devices are often heavy, about five to 10 pounds, and require an energy source to create the vacuum, making them difficult to apply in disaster settings. Texas-based KCI, the leading maker of negative-pressure machines, has a portable version that’s battery powered, but it costs approximately $100 per day to rent. A number of companies are working on even more portable versions, say Orgill.

Keep reading at Technology Review.

Truly Green Beer This St. Patrick’s Day

- Dan Harrison 1 Comment

Many breweries have stepped up their efforts to limit the negative environmental effects of brewing beer. Steam Whistle Pilsner has earned praise from many an environmentalist for their progressive steps toward becoming a green brewery.

The Toronto-based brewery gets its electricity from Bullfrog Power, which uses wind and low-impact hydroelectric sources. Its cooling is by Enwave, which uses cold water from deep in Lake Ontario, and new brewing equipment that captures steam cuts their wastewater by a third. Its trucks run on biofuels and, thanks to improved route planning, they cut the amount of fuel they used last year by more than 7,000 litres – while increasing sales.

Of course, Steam Whistle isn’t the only brewery improving their environmental standards: Brasserie McAuslan in Montreal and Molson Coors have both reduced their water use in recent years.

You can read the whole article at The Globe and Mail.

Vancouver Safe Injection Site Survives

- Fono 1 Comment

Vancouver’s Insite is the first safe injection site in North America. The project has been shown to reduce public drug use, needle sharing, littering, and increase addiction treatment. The Canadian government has been trying to shut it down recently, but in January, Insite won a court battle that recognized them as providing an “essential medical service.”

The B.C. Court of Appeal has dismissed a federal government appeal, which means InSite, the Vancouver supervised safe-injection site that was the first of its kind in Canada, will remain open.

The federal government is expected to appeal Friday’s split 2-1 ruling to the Supreme Court of Canada.

Vancouver Mayor Gregor Robertson reacted by saying he strongly supports the ruling and the continued operation of InSite to improve the lives of drug addicts.

“With this second consecutive decision in favour of InSite, I hope the federal government will drop its legal efforts so that we can go back to focusing on InSite for what it is — a harm reduction facility that saves lives and improves health outcomes for those living with addictions,” the mayor said in a statement.

Read the whole article at the Vancouver Sun

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