WAG Water Treatment Plant in Roetgen

Dam water filtration with Foulex

WAG | BOLLFILTERBOLLFILTER automatic at WAG water treatment plant

Automatic filtration at WAG treatment plant

Two Backflushing BOLLFILTERs Automatic were installed at the WAG Water Treatment Plant in Roetgen, Germany for the filtration of dam water. Removing particulates down to 150 microns, they provide primary protection for the membrane plant used for the ultra-filtration of potable water supply to the Aachen region.

However, due to the presence of manganese bacteria, a biofilm formed on the filter elements after just three month’s operating time. As a result, the normally self-cleaning filters had to be manually cleaned – washed inside and out with a high-pressure cleaner and decontaminated with an acidic cleaning agent.

Foulex improves filter performance

The solution to the problem was a new development from BOLL & KIRCH’s R & D Team: FouleX. FouleX is an antibacterial coating designed to prevent biofilm contamination. It was applied to the WAG filter elements and, after three month’s normal operation, the elements were checked and found to be free from biological growth.

The operating company at WAG was delighted with the improved filter performance. “With the FouleX coating, the operating time without cleaning has been extended to 16 months. What is more, the cleaning process is much easier, requiring just rinsing with water.”

A maintenance interval of 12 months is normally recommended for BOLLFILTER Automatic Systems. At the WAG plant, the FouleX coating has increased this by a third, significantly reducing maintenance and downtime. The cost for cleaning chemicals has also been reduced.

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