Following 5 years of perseverance, on December 23rd 2016, CMI Europe Environnement won a major contract to equip a future composting site located to the East of the South bank of Montreal (Canada).

What is the context for this project?

From 2020, the Quebec government is to ban the disposal of organic material in landfill sites, so an alternative to this had to be found.

The future center for treating and reusing organic matter via biomethanization and composting will recuperate and treat all the food remains (vegetable or animal) along with the green waste from 27 municipalities, with a total population of around 235.000 persons. It will treat more than 35.000 tonnes of organic waste every year. This material, saved from landfill, will then become an urban source for green energy.

CMI Europe Environnement has been selected to supply the odors treatment system and liquid effluent recovery system.

A victory following months of negotiation

This success is the concrete result of several years of sales effort, due a rigorous procedure for selecting the suppliers. The very first sale approach started in September 2011; then the call for tenders was submitted early 2013; the effective selection as potential supplier of the odors control system was confirmed in March 2013; and 3 years later: an order.

At stake with this project?

This project will be a reference for CMI Europe Environnement, which is to install the first stripping installation in Canada allied to a complete composting odors treatment solution for an airflow of 40.000 m3/h.

CMI Europe Environnement is going to supply:

  • the air treatment unit enabling the odorous effluents from the site to be treated, made up of a scrubber (to capture the pollutants in the air in a liquid cleansing solution which will then be channeled to the Varennes water treatment plant) followed by a covered bio-filter of 300 m² (where the pollutants will be dissolved in water and then degraded by bacteria), allied to the whole ventilation network right up to the evacuation chimney,
  • the stripping unit enabling the ammonia to be treated. What will happen is that the organic matter is digested for more than 20 days in digesters in order to produce biogas, a clean energy which will be used as a combustible fuel to heat the factory. During this biomethanization stage, not just biogas is produced, but also residues known as ‘digestates’, which are highly charged with ammonia. To treat this pollutant, CMI Europe Environnement is going to deploy an air stripping solution in 2 stages: stripping (step 1) consisting of transforming the liquid ammonia into gas, then absorption by acid washing (step 2) which will serve to trap the gaseous ammonia in the form of ammonia salts, which will then be used as quality organic fertilizer for spreading, in place of the traditional chemical fertilizers.

The official operation will start in the spring of 2018.