The plant is located on St-Laurent Street in Beauharnois, a Montreal suburb. The treatment station pumps its water from the St-Lawrence River and flows throughout static clarifier and filters. The plant produces drinking water for a population of 10,000 persons and several industries.

The plant was producing 11 000 m3/d of filtered water with 5 monolayer filters (sand only). These filters are limited to a filtration rate of 5m/h. The client wanted to double its filtration capacity and to produce 22 000m3/d.

The existing filters rehabilitation in bilayers (sand and anthracite, 10m/h) was impossible with standard filters bottoms, considering the limited depth.

One of the solutions considered was to build 4 new monolayer filters with standard nozzle false bottoms but this solution required an important investment.

John Meunier Inc. proposed the installation of AWI stainless steel filter bottoms in the existing filters. These bottoms allow a gain of 30 to 75 cm of available height compared to the existing bottoms.

So we rehabilitated three existing filters in bilayers with the addition of only one new filter. These four filters are equipped with AWI Phenix bottoms wits sand and anthracite allowing filtration rates of 10m/h. This solution was much more economical for the town of Beauharnois.

John Meunier Inc. has achieved this turnkey project with the supplying, installation and startup of filters with AWI bottoms and the new media.

The implementation of these works has contributed to the conformity of drinking water production requirements while insuring a water production capacity for many years to come with a flow of 22 000m3/d.