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BRIMOM Informe resumido

Project ID: EVR1-CT-2002-40023
Financiado con arreglo a: FP5-EESD
País: Germany

Antifouling strategies for automated coastal monitoring stations

Antifouling techniques for automated monitoring stations based on flow through systems were established and tested in the river Elbe and the North Sea. Depending on the location of the station and the season optimal antifouling techniques with minimal energy and reagent consumption were found. Standard antifouling strategies for in-situ sensors cannot be used for such flow through systems, because the whole system has to be protected.

One method is the variation the flow rate:
With flow rates of less than 0.1m/s in the summer in the German Bight a reduction of the flow rate by 50% shows 70% less biofouling. For very high flow rates the reverse effect will be found. Different cleaning procedures are needed depending on the area: Starting from automated tap water risning (for artic waters) over acidification to pH 3 (for temperate waters) up to a combination of acidification and chlorination (for tropical waters).

The latter was carried out by establishing an in-situ electrolytic production of chlorine in the flow through system. This reagent-free antifouling method is easy to install and the maintenance is safe. By this procedure more than 95% of biofouling can be prevented over several months providing a sufficient data quality.

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Contacto

Friedhelm SCHROEDER, (Head of Department)
Tel.: +49-4152872371
Fax: +49-4152872366
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