The quality of both drinking water and waste water are key focus areas for municipalities and a variety of industries. In North America, customers in Québec, including the Régie Intermunicipale de l’eau Potable (RIEP) of Varennes, Sainte-Julie and Saint-Amable, have made the switch to Kemira PAX-XL1900, a high-concentration, high-basicity, aluminum-based chemistry. The findings of their tests with warm water are clear: water treatment processes are simplified and overall costs are lowered.
Offering a wide range of iron and aluminum-based products, as well as polymers, Kemira has been a pioneer in product development for the water and waste water markets. Providing the best-suited technology for a specific application has been at the heart of the Kemira philosophy in the market place.
New production process means lower costs
The addition of a new production process at the Varennes, QC site for aluminum chlorohydrate supports these efforts to best meet customer needs at lower costs for municipalities such as Cornwall, Montreal, RIEP of Varennes, Sainte-Julie and Saint-Amable and other customers in Atlantic Provinces.
The evaluation at the RIEP of Varennes, Sainte-Julie and Saint-Amable drinking water plants started in July 2016 when warm water treatment began. The results were compared with the ones of the incumbent solution.
Catherine Brosseau, Technical Representative, Municipal & Industrial, Eastern Canada, at Kemira gave the following analysis:
“The water quality and treatment performance were already very good. The drivers for testing Kemira PAX-XL1900 was the RIEP desire to simplify the drinking water treatment process and operation by using only one coagulant year round, instead of transitioning from acidified alum to polyaluminum silicate sulfate for warm and cold water conditions respectively.”
In this case, the customer also sought to maintain the good water quality while implementing fewer chemicals, specifically to reduce the consumption of lime, and therefore adjusting the pH of the finished water to prevent corrosion in the distribution system.
Kemira PAX-XL1900 performed as designed. It had a great fit with the customer’s water and the water quality continued to be consistently good.
In this case, the benefits of Kemira PAX-XL1900 were clear:
Low dosage requirement: a reduction of 8% in active material (Al), corresponding to 80% reduction in the feed rate as-is.
Minimal pH reduction: much less drop in pH – final pH 8.3 with Kemira PAX-XL1900
High turbidity removal: consistent turbidity removal to below 0.2 NTU (settled) and less than 0.06 NTU (filtered)
Filter run times doubled: improvement of more than 100 hours
Fewer chemicals used: no lime is required for final pH adjustment
Low alkalinity consumption: high basic polyaluminum chloride / aluminum chlorohydrate chemistry will consume less alkalinity compared to alum
Significant cost savings: total treatment cost of the water was reduced (longer filter runs, lower chemical cost) while improving final water quality
Throughout the winter months, the evaluation will continue with cold water. As Brosseau points out:
“Only then can we see all the benefits of using the chemistry. We’re expecting good feedback, as the Kemira PAX-XL1900 has proven to be highly effective in cold water.”
In addition to Kemira PAX-XL1900, Kemira has a full portfolio of inorganic coagulant chemistry, which includes a full range of aluminum as well as iron coagulants. With this portfolio Kemira is proud to offer the best drinking water and wastewater treatment solutions that meet the specific needs of each customer.
Kemira will be present at Americana – the largest multi-sector environmental exhibition in North America – held in Montreal on March 21–23, 2017. As the only basic manufacturer of the full range of solid/liquid separation chemistry, including inorganic coagulants, organic coagulants and high molecular weight polymers, we will be highlighting our full portfolio of water treatment solutions.
Come and meet us at booth #518 for more information! To pre-book a meeting, please contact Serge Chouinard, firstname.lastname@example.org Tel: + 1 450 652 0665 x 232.