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

Remember Spunky? Santa came out to Sidney to check on him

Red-tailed Hawk made headlines last year after being stolen, raised by eagles

MISSING: 59-year-old Pamela Fletcher

Fletcher was last seen in the area near Royal Jubilee Hospital on Dec. 10

Beached boat grounded by weather in Oak Bay

20-foot fibreglass sailboat ended up ashore

Custom motorcycle and wood cutter stolen from Sooke motorcycle shop

2006 Husqvarna motorcycle and 2-ton log splitter taken from outbuilding

Mainroad South Island reminds drivers to keep them in the loop

Call the hotlines for concerns on local provincial highways

VIDEO: Royals reveal the images on their Christmas cards

Prince William and his wife Kate are shown outside in casual clothes, their three young children in tow

POLL: Are you dreaming of a white Christmas?

The rain Vancouver Island is famous for is coming down in buckets,… Continue reading

Greater Victoria Crime Stoppers wanted list for the week of Dec. 11, 2018

Greater Victoria Crime Stoppers is seeking the public’s help in locating the… Continue reading

Media, robotics, Indigenous studies coming to B.C. Grade 12 classrooms in 2019-20

Provincial tests are also being changed for students in Grade 10 to 12, the Education Ministry said

ICBC to apply for 6.3% hike to basic insurance rates

Crown Corporation said it will be submitting its next basic rate application to the British Columbia Utilities Commission Friday

Stranded B.C. trucker writes final wishes before being rescued 3 days later

‘I was just praying someone would come along’

Canfor Corp. extending temporary curtailment of sawmills in B.C.; cutting hours

Vancouver-based company says the decision is due to declining lumber prices, high log costs and log supply constraints

Canada’s prospective world junior team members await final roster decisions

Thirty-four players were invited to the national junior selection camp

Woman guilty of impaired driving in death of Vancouver Island pedestrian

Man in his 70s killed in 2016 Courtenay multi-vehicle incident

Most Read