Water: quality of life

Watercourse restoration in a wetland
  1. Home
  2. Business areas
  3. Water body rehabilitation
  4. Oxygen enrichment in the water body
View YouTube video

Permanent watercourse maintenance

Pollutant control, water conservation, quality improvement.

Weining, China: The long-term application in the wetland Caohai Lake (CHN) had the goal of improving the water quality. It is a wetland with an area of 20,000 m2 (project area). The chemical parameters phosphorus, total nitrogen, BOD, COD, visible depth and sulphates were reduced.

back to overview

Improving water quality in the bird sanctuary

Degradation of pollutants through oxygen therapy

sustainable oxygen saturation

The aeration has significantly improved the water quality:

Chemical oxygen demand COD was reduced by more than 70 %, BOD5 by 93 %. Total N was reduced by 60 %, the visibility depth was doubled and TP was reduced by 90 %. According to these chemical-physical parameters, the trophic status of the water body could be improved from 4.12 (actual status) to 2.6 through the treatment. A permanent visibility depth of 0.8 m can be achieved and thus the visibility depth was more than doubled.

In the wetland there are both channels and amorphous islands - the Drausy® aeration system adapts to the environment as it is laid in a linear fashion. Here you can see the installation line as a dotted line on the water surface.

Installation in the canal

Drausy® adapts to the shape of the watercourse
View of working boats in the wetland - you can see the structure of the artificial agricultural area

Renaturalise the siltation area

Former agricultural use
View from above: the Google Earth map shows the project area adjacent to Caohai Lake.

Sedimentation areas

Artificial fields are renaturalised
Two workers in the wetland with an inflatable boat are checking the Drausy® aeration lines. In the background you can see Caohai Lake

Oxygen therapy in the Wetland

Up to 10 km system distance with one unit
Two workers stand on a pontoon and lay out Drausy® Professional aeration sections. Environment: Wetland area of Lake Caohai

Oxygen therapy in the Wetland

Up to 10 km system distance with one unit
In the wetland there are both channels and amorphous islands - the Drausy® aeration system adapts to the environment as it is laid in a linear fashion. Here you can see the installation line as a dotted line on the water surface.

Relocation in the marshland

Drausy® adapts to the shape of the watercourse
  • Controlled pollutant binding - phosphate remains bound in the aerobic sediment
  • Volume reduction - through decomposition of the organic matter and compression of the sediment
  • Oxygen enrichment - the water body is qualitatively upgraded

Drausy® Treatment in the Wetland

This is how the water values have improved:

Project details Wetland Treatment

Which products have been used?

The existing sludge in the lake, in the channels and under the reed polders had to be removed. This was the only way to make the water clean and attractive again. At the same time, it was important to reduce the inflowing nutrients. For a treatment area of 20,000 m2 , 2,000 m of system hose and growth carriers were used.

Contact us for your customised Drausy® system.

Problems with mud or odour? We do have your solution.
Get in touch with us