Carbon monoxide releases twice as high at the Quebec incinerator
The chimneys of the incinerator of Quebec spat on average in 2018 twice as much carbon monoxide than the norm prescribed.
C ‘is what we learn from the report of the Vigilance Committee of the incinerator presented in late April. The highest peak was obtained in an analysis conducted in October 2018. It showed a content of nearly 350 milligrams of monoxide per cubic meter while the regulation on landfilling and incineration of residual materials sets the standard at 57 mg / m3.
According to Mireille Plamondon, City Communications, the problem is being addressed with technical improvements to the combustion process. “We are installing natural gas burners for each of the four ovens. It was part of the actions taken in [March] 2017 after observing overruns in standards, “she says.
The excess emission of carbon monoxide is due to the fact that the furnaces can not maintain at any time a minimum heat of 1000 degrees Cº. The materials burn less well, hence the rise in monoxide.
“It happens especially during the cold season, says M me Plamondon. Sometimes the bins arrive with snow, it extinguishes the fire and it creates temperature variations. Other times, it may have been due to the nature of the materials received. For example, turf residues are often very wet and lower the temperature of the kilns. ”
To alleviate the problem, the City invested in the addition of two natural gas burners for each of the four incinerator furnaces. The first two burners were installed in 2018, four more will be in the course of the year and the last two in the winter of 2020, has it been possible to learn from another source.
Councilor for the Environment, Suzanne Verreault, explains that $ 15 million will have been invested over five years by the end of 2020 to upgrade equipment and meet standards.
Over the years, the City of Quebec has encountered standards overruns for other substances such as arsenic. In December 2017, Le Soleil reported that a sample collected at the exit of the chimneys the previous summer indicated an arsenic rate 176 times higher than the limit fixed.
The city then improved its mode of distribution of activated carbon in the furnaces. The substance is known to control emissions of arsenic, mercury, dioxins and furans. The release of these substances is now under the Quebec standard, according to the surveys done in 2018.
In a recent survey, nine out of ten residents in Old Limoilou said they were concerned about the environment and air quality. They identified the proximity of the incinerator and the proximity of the Laurentienne and Dufferin-Montmorency highways as major issues.
A partial report on air quality revealed earlier this year concludes that Limoilou residents are among Quebecers who breathe the most fine particles.