Maintain bathing waters

Oxygen therapy against cyanobacteria and algae
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View of the pond Maderna - a bathing lake in the Austrian Deutsch-Brodersdorf - in the setting sun

Durable watercourse maintenance

Algae prevention through oxygen therapy.

Deutsch-Brodersdorf, Austria: The intensive conversion and decomposition processes of the organic substances that had been sedimented for years, brought about by the aeration, were largely completed after two years: The sediments are almost free of algae and bacteria growth. The aeration measures will be continued in order to keep the algae growth as low as possible (mechanical stress) and to further promote oxidation processes in the sediment. 

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Avoid algae and cyanobacteria

Madernateich bathing lake - preserving the water body, safeguarding bathing operations

Algae prevention

Permanently bind nutrients and pollutants to the sediment:

Due to an increased nutrient supply, algae multiply in the body of water - the algae are sometimes very small - so-called floating algae lead to a low visibility depth. The Drausy system binds nutrients at the bottom of the water body. This makes the water clearer, as floating algae no longer find food - excess nutrients are permanently removed from the water body.

The bathing lake is populated with guests in summer - pedal boats and other boats also sail on the body of water. The Drausy aeration system does not interfere with the usage of the water.

Bathing fun by the lake

The Drausy system does not interfere with bathing activities
View of Maderna Pond - the surface of the water is as smooth as glass, you can see some terraces of the surrounding houses on the banks

Bathing fun by the lake

The lake invites to bathe
View of a bathing entry point in the Maderna Pond

Bathing fun by the lake

The lake invites to bathe
You can see some recreational boats in the harbour bay of the Maderna pond

Maderna Pond Harbour

The lake invites to stay
Sampling trip with diver - a sediment sample is taken to check the changes caused by Drausy®.

Monitoring at Maderna Pond

The lake is regularly surveyed
Organic matter has collected in the sediment for many years - this is continuously broken down by the Drausy aeration system. Sediment samples from four years show the success

Sediment samples over four years

Conversion and degradation processes of organic matter
  • Algae avoidance - as long as the sediment is aerobic, no mass proliferation of algal populations or cyanobacteria occurs
  • Nutrient and pollutant binding - as long as the sediment is aerobic, nutrients and pollutants remain bound in a controlled manner

Climate change with consequences - increased temperatures lead to oxygen deficiency

Oxygen consumption in the water as a function of water temperature:

Diagram O2 content vs. Temp avoid algae and cyanobacteria

Which products have been used?

For watercourse improvement, the Drausy Professional aeration system was used with a length of 1,000 m since 31 May 2008 - the system is still in use.

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