Wastewater treatment with aerobic granule technology is exceptionally efficient
A wastewater treatment plant with the new aerobic granule reactor uses approximately 20 to 40% less energy.
Photo Ron Winkler: A water nymph congratulates Veluwe District Water Board's dike warden Gert Verwolf at the topping-out ceremony for the first Nereda wastewater treatment plant currently under construction.
ENGINEERINGNET - In Epe, there has been a topping-out ceremony for the innovative wastewater treatment plant currently under construction. Thanks to a new treatment technology, the plant uses less energy and chemicals, takes up less space and costs less in terms of investment and operation than conventional wastewater treatment plants.
The technology is used for treating household and industrial wastewater, using approximately 20 to 40% less energy thanks to a special aerobic granule technology.
Conventional sludge grows in floc structures, settles slowly and is difficult to separate from the treated wastewater. However, the bacteria in the new Nereda plant grow in granules, which means that less ‘settling space' is needed and thus the treatment system takes up less space.
The seeds of the new technology were sown in around 1998 in a project financed by the STW Technology Foundation and led by the researchers Dr Mark van Loosdrecht and Dr Merle de Kreuk of the Delft University of Technology.
In this project, the technique of allowing water-purifying bacteria to grow in granules was developed into a feasible plant.