Filtering system under test

On Friday and Saturday, October 23 and 24, 2020, the jetty of the Norderney Sailing Club (SVN) was taken out of the water and cleaned. A filter system developed by Dr. Brill + Partner and the SVN was tested to remove biocides and paint residues from the antifouling paints. The four-stage filter system, consisting of sedimentation tank, fiber peat filter and activated carbon filter, was installed directly next to the "wash place" to filter the wash water on the spot and thus prevent the antifouling biocides from getting into the environment.

In the course of the day, weak points of the system could be identified and eliminated. It turned out that the wash water was produced faster than it could be filtered. This was remedied by a 4 m3 container, which was spontaneously made available free of charge by the Onnen company and acted as a buffer storage. It also showed that the water produced contained significantly more suspended solids and sediments than expected. The suspended matter settled faster than expected on the felt mats used and hindered the flow of the water. As a result, the felt mats were replaced with gauze, which prevented clogging, so that the filter worked properly again.

The filtered wash water was then discharged into the dock. Visually, a clear filter performance was visible, the analysis results are still pending.