Farm manure could be viable renewable energy source, Canadian researchers say

A chemical reaction in the converter would produce methane from carbon dioxide in the biogas

Researchers at an Ontario university say farm manure could be a viable source of renewable energy to heat homes.

University of Waterloo scientists say they are developing technology to produce natural gas from manure so it can be added to the existing energy supply system for heating homes and powering industries.

The proposal would eliminate harmful gases released by naturally decomposing manure when it is spread on farm fields as fertilizer.

They say it would also partially replace fossil natural gas, a significant contributor to global warming.

Chemical engineering professor David Simakov says the technology could be viable with several kinds of manure, particularly cow and pig manure, as well as at landfill sites.

In addition to being used by industries and in homes, the researchers say renewable natural gas could replace diesel fuel for trucks, another major source of greenhouse gas emissions.

“There are multiple ways we can benefit from this single approach,” Simakov said Thursday in a statement. “The potential is huge.”

To test the concept, researchers built a computer model of an actual 2,000-head dairy farm in Ontario that collects manure and converts it into biogas in anaerobic digesters.

Some of that biogas is already used to produce electricity by burning it in generators, reducing the environmental impact of manure while also yielding about 30 to 40 per cent of its energy potential.

Researchers want to take those benefits a significant step further by upgrading, or converting, biogas from manure into renewable natural gas.

That would involve mixing it with hydrogen, then running it through a catalytic converter. A chemical reaction in the converter would produce methane from carbon dioxide in the biogas.

Known as methanation, the process would require electricity to produce hydrogen, but that power could be generated on-site by renewable wind or solar systems, or taken from the electrical grid at times of low demand.

The net result would be renewable natural gas that yields almost all of manure’s energy potential and also efficiently stores electricity, but has only a fraction of the greenhouse gas impact of manure used as fertilizer, the Waterloo researchers said.

“This is how we can make the transition from fossil-based energy to renewable energy using existing infrastructure, which is a tremendous advantage,” said Simakov, who collaborates with fellow chemical engineering professor Michael Fowler.

The modelling study showed that a $5-million investment in a methanation system at the Ontario farm would, with government price subsidies for renewable natural gas, pay for itself in about five years, the researchers said.

Peter Cameron, The Canadian Press

Like us on Facebook and follow us on Twitter.

Just Posted

Paramedics union raises alarm over spike in out-of-service ambulances

Staffing shortages affecting service levels in Kootenays

West Kootenay rod and gun clubs slammed for animal-killing contests

Wildlife activists are targeting the club and two other B.C. organizations

Interior Health hospitals to serve more made in B.C. food

New initiative by the Ministry of Agriculture to serve more B.C. produced food in hospitals

After mosque attacks, New Zealand bans ‘military-style’ guns

The gunman killed 50 in a Christchurch mosque

Okanagan man, Yorkshire terrier chased by coyote

Animal sightings have been reported around West Kelowna and the Central Okanagan

Having phone within sight while driving does not violate law: B.C. judge

The mere presence of a cell phone within sight of a driver is not enough for a conviction, judge says

B.C. lottery winner being sued by Surrey co-workers

They claim he owes them $200,000 each, in a lawsuit filed in B.C. Supreme Court in Vancouver

Pot industry welcomes decreased edibles tax, but unhappy medical tax remains

Taxes can increase the cost of medical cannabis by as much as 25 per ceny

‘It has to send a message:’ Broncos families await sentencing for truck driver

Jaskirat Singh Sidhu pleaded guilty to 29 counts of dangerous driving and apologized in court

MPs continue voting marathon as Tories protest shutdown of Wilson-Raybould motion

Multiple MPs have resigned from Trudeau’s Liberal cabinet

Canucks hang on for 7-4 win over Senators

Horvat nets 2 for Vancouver

European, Canadian regulators to do own review of Boeing jet

Air Canada plans to remove the Boeing 737 Max from its schedule at least through July 1

Most Read