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

‘Beauty amongst such tragedy:’ B.C. photographer captures nature’s trifecta

David Luggi’s photo from a beach in Fraser Lake shows Shovel Lake wildfire, Big Dipper and an aurora

Bullhead derby returns to Port Alberni with new date, location

Lions Club partners with Maritime Discovery Centre

Vancouver Island woman to attempt historic swim across Juan de Fuca Strait today

Ultra-marathon swimmer Susan Simmons to attempt to swim from Victoria to Port Angeles and back

Port Alberni RCMP honour fallen officers from New Brunswick

Moment of silence, prayers held for Fredericton officers killed last week

‘We will not forget:’ Thousands attend funeral fallen Fredericton officers

Hundreds of officials marched in the parade, which included massed band, several police motorcycles

BREAKING: Evacuation order issued in Island village due to “risk of falling debris”

Several homes in Zeballos are under an evacuation order as wildfires continue… Continue reading

Lions give up late TD in 24-23 loss to Argos

B.C. falls to 3-5, fumbling away last-minute chance in Toronto

Eagle tree cut down legally a 1st for B.C. city

Planned eagle preserve ‘a first for City of Surrey’

Smoky skies like a disappearing act for sights, monuments around B.C.

Haze expected to last the next several days, Environment Canada said

Canadians react to death of former UN secretary-general Kofi Annan at age 80

Nobel Peace Prize-winning former UN leader died early Saturday following a short illness

44 drownings so far this year in B.C.

Lifesaving Society urging caution to prevent deaths while on lakes, oceans and in pools

Some of B.C.’s air quality levels worse than Jodhpur, India

Okanagan, northern B.C. seeing some of the worst air quality globally

VIDEO: Ground crews keep a close eye on largest B.C. wildfire

Originally estimated to be 79,192 hectares, officials said more accurate mapping shows smaller size

Most Read