Turning Clarifier Overflow Into $25,000 of First-Year Savings
The Situation
A pulp and paper plant was hemorrhaging $35,000 per year in city water purchases — not from inefficiency, but from a gap in their filtration thinking. Their clarifier was producing large volumes of overflow water that were going straight to the drain. Every litre that went down the drain was replaced with expensive municipal water. The engineering team knew they needed to recover and reuse that overflow — but their existing system had no way to filter water containing the plant's active polymers without breaking the chemistry.
The Challenge & Solution
The polymer compatibility requirement ruled out off-the-shelf media. K Factor engineered a custom filter medium compatible with the specific polymer chemistry, delivering 70 GPM at 200-micron nominal — the right specification for floating pulp stock in clarifier overflow. The system has run without incident since installation, consuming just two media rolls per year.
The Result
$25,000 — saved in Year 1 from eliminated city water purchase
2 rolls — of media per year — minimal consumable cost
Zero issues — reported since commissioning — client's own words
New market — this solution opened doors to multiple plants with the same clarifier overflow problem
