Phosphorus removal has never been better for an Ontario cheese producer after switching to ClariPhos™ Rare Earth Coagulant for its onsite membrane bioreactor system. Operators began using ClariPhos in 2019 after experiencing inconsistent results with aluminum sulphate (alum) to achieve a phosphorus limit of less than 1 mg/L.
When the plant was commissioned several years ago, alum was initially added directly to the MBR to precipitate phosphorus in the process tank; however, this resulted in excess foaming, significant swings in pH and frequent upsets to the biological process. A tertiary filtration system was installed at a cost well into six figures, and though the system did alleviate the issues and consistently achieve the target phosphorus limit most of the time, it also significantly increased operating and maintenance costs. The operations team continued searching for a simple, cost-effective solution.
Fast and easy switch to ClariPhos
Bench testing with ClariPhos showed promising results and in the spring of 2019 the plant began full-scale testing. The transition was simple since ClariPhos uses the same chemical feed equipment as alum. Operators simply replaced the tote, flushed the line and set the new, much lower dose rate for ClariPhos. Since one of the objectives was to eliminate the tertiary filtration system, the team decided to add ClariPhos directly to the bioreactor, despite the problems that were experienced with the alum.
Within a few days, the benefits of ClariPhos began to emerge for the operators:
Watch our video to see faster settling rate and lower sludge production for ClariPhos vs. conventional aluminum- and iron-based alternatives.
Learn about ClariPhos™, a game-changing rare earth coagulant that outperforms aluminum- and iron-based alternatives for phosphorus removal.
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