AbstractsEngineering

The purpose of this study is to examine the treatment process at ten plants in the Montreal area, located on the Riviere des Mille Iles and the Riviere des Prairies, treating the water for public water supply. The efficiency and economy of these ten municipal filtration plants have been examined. Field surveys have been made and samples collected over a period of eleven weeks to accumulate data for interpretation. The quality of raw water and its fluctuation, particularly during the spring break-up of the rivers, is considered. The application efficiency and quantity of chemicals employed in water coagulation are investigated. The efficiency of water treatment prior to filtration is related to data of removals obtained.