In 2021, HUBER Technology, the Denver, North Carolina-based subsidiary of HUBER SE, was awarded the contract for the modernization of the La Crosse, Wisconsin, wastewater treatment plant located on Isle La Plume.

The scope of supply includes a HUBER Multi-Rake Bar Screen RakeMax CF in the screen building in the inlet to the WWTP, a HUBER Belt Dryer BT 18 for sewage sludge drying, and a HUBER Sludgecleaner STRAINPRESS for primary solids screening. The total investment volume of the modernization package amounts to about $60 million.

One of the reasons for implementing this modernization project were two defective shredders that were regularly flooded and caused significant bypass problems. HUBER solved this problem by installing one of its multi-rake bar screens, which has proven itself in thousands of installations worldwide. This allows work to be carried out on the operating deck.

The HUBER RakeMax CF screen with its vertical design enabled the engineer to combine both shredding channels into one larger channel and to route 100% of the influent through one screen. This is capable of handling the full hourly peak flow. Special baffles for the inlet allow for an emergency overflow (bypass) in case of a power failure of the plant. The screen is also very easy to maintain because it has no bottom bearing and thus no submerged wearing parts.

Learn more about the solids screening and drying process at the La Crosse plant

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