How a Cooling Tower Loop Cut its Waste and Disposal Costs by Using an Environmentally Friendly Filtration Process-- A Real World Documented Case Study

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A manufacturer of plastic personal grooming products was recycling mold-cooling water through a cooling tower. Unfortunately, the cooling water was picking up airborne particulate in the process, which caused frequent blowdowns, required maintenance, and created downtime on the molding machines.

Traditionally, engineers have opted for disposable media filters because of their lower initial cost. While initial cost may be lower for small batch operations, the same is not necessarily true for continuous operations.

That is because you would need a completely redundant filtration system, including piping, valves, supports, and service connections - not an insignificant expense by any means - to maintain production.

To remove this particulate, the company installed a Ronningen-Petter self-cleaning filter. With this type of filter system, the media is cleaned and regenerated while the unit remains on-line.

This means a simple single-piping arrangement, minimal valving, and fewer connections - for a lower total system cost and reduced waste.

Since then, they've eliminated this costly downtime and reduced their waste.

What's more, controlling suspended solids by filtration rather than blowdown substantially reduces water use.

Moreover, because the filter cleans itself only when necessary, treatment chemicals and waste disposal costs are minimized.

by Ask Filter Man

For questions about industrial filtration, please visit the Ask Filter Man forum at

If you would like to discuss this filtration solution with one of Ronningen-Petter's highly-trained Applications Specialists, please visit

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