Microbial water treatment for Woellner cooling towers

Woellner GmbH, a German chemical solutions provider with more than 130 years of experience, wanted an alternative approach to conventional chemical treatment of the closed-circuit water in cooling towers. In January 2021, the company introduced Waropure®, powered by HeiQ microbials.

Before this change, cooling lamellas accumulated up to 40% organic and inorganic buildup and required replacement once or twice a year. Each replacement caused production interruptions and cost the company approximately EUR 20,000. After switching from chemical treatment to Waropure®, improvements became visible quickly. The lamellas remained clean, water quality was stable, and no replacements were needed since the start. This also helped reduce maintenance‑related downtime. The shift to a microbial supported Woellner’s efforts to reduce the use of harsh chemicals while increasing operational reliability. Regular inspections and microbiological analyses confirmed the consistent system performance.

Günther Popp, Business Manager at Woellner, commented: “Switching to probiotic industrial water treatment with our own Waropure® brand was a game changer for our and our customers’ cooling towers. We can attest that we have clean lamellas, no more unpleasant odors, safe system operation since 2021, and considerable savings in maintenance costs. Many of our customers benefit from the same approach.”