Montreal

Finally, Montreal has its own composting plant

Montreal has finally opened an organic waste treatment plant. For years, the city has been trucking food scraps more than 100 kilometres away — often to a facility in Ontario.

Organic waste can now be treated on the island, after years of sending it to Ontario

tunnels in the composting plant
A look inside the new composting centre in Montreal's Saint-Laurent borough. The centre was officially opened Monday, but has been in operation for several months. (Ivanoh Demers/Radio-Canada)

For years, Montreal has been trucking the food scraps from residents' brown bins more than 100 kilometres away to facilities in Ontario and Joliette, Que.

Now, at long last, the city has its own composting site for residential waste. 

Montreal Mayor Valérie Plante officially opened the facility in the borough of Saint-Laurent on Monday.

With the new facility now in operation, roughly 25 per cent of the city's population will be able to have its organic waste treated locally.

"It's great because, for the first time, we will be creating compost here that will be used here on our territory," Plante said at a news conference.

WATCH | A look inside the new facility: 

Inside Montreal’s first composting plant

1 month ago
Duration 1:53
The facility in the Saint-Laurent borough is the first on the island of Montreal. It mainly serves the West Island and processes about a quarter of Montreal’s compost.

In the past, she said, that food waste had to be taken by truck up to 180 kilometres away, spewing out greenhouse gas emissions in the process.

Soil for residents, fertilizer for farmers

The Saint-Laurent facility will process food and yard waste from the western part of Montreal, as well as some cities in the West Island. 

It has an annual processing capacity of 50,000 tonnes of organic matter  — the equivalent of 20 Olympic swimming pools.

cabbage in the foreground of composting plant
The centre in Saint-Laurent processes both food and and yard waste. (Ivanoh Demers/Radio-Canada)

Veolia president Frédéric Van Heems said the plant is designed to eliminate any stink for nearby residents, which had been a concern when the project was first announced.

"There is no odour," said the head of the French company behind the project. "All the composting is done in tunnels."

The resulting product will be made available to residents as top soil, he said, while another part will be sold as fertilizer to nearby farmers.

A second facility is still in the works in Montréal-Est, slated to open next year, which will process the other 75 per cent of food waste.

Delays and cost overruns

Construction of both facilities have been beset by delays and cost overruns, most recently due to a labour dispute involving Veolia and a local contractor.

outside compost plant, a truck and a tunnel
Officials say the treatment centre won't emit a stinky odour, despite being able to process 50,000 tonnes of organic matter annually. (Ivanoh Demers/Radio-Canada)

In 2013, the city had budgeted $237 million for five separate centres across the city, but the project was later scaled back to two centres, at a higher cost.

The Saint-Laurent composting centre, located on Henri-Bourassa Boulevard, was built at a cost of $169 million — a price tag that climbed by roughly $5 million after the labour dispute.

The cost was divided between federal, provincial and local governments.

A greener option

At the announcement Monday, Plante encouraged residents to take part in composting.

As it stands, roughly 60 per cent of those in buildings with eight or fewer units compost their organic waste. That number drops to about 30 per cent in buildings with nine or more units. (A guide for how to start composting is available here.)

"The people that already do it, continue to do it," she said. "People that haven't done it for different reasons, it's time to start."

Karel Ménard, executive director of the Quebec Coalition of Ecological Waste Management, said the Saint-Laurent facility is an environmental win, because it will provide rich soil to farmers and, at the same time, reduce greenhouse gas emissions resulting from organic waste.

"When we compost it, we turn it into a resource in the form of a much-needed amendment to our farmland," he said.

As it decomposes landfills, food releases large amounts of methane, a greenhouse gas that is 80 times more potent in terms of warming than carbon dioxide as it breaks down over 20 years. 

Environment Minister Benoit Charrette said roughly 50 per cent of what ends up in landfills in Quebec is compostable.

"It's a total loss to send these substances into the landfill," he said. "That's why a project like this is so important."

ABOUT THE AUTHOR

Benjamin Shingler is a reporter based in Montreal. He previously worked at The Canadian Press and the New Brunswick Telegraph-Journal.