Concept development for the optimisation of the Hamburg Wastewater Treatment Plants

The Hamburger Stadtentwasserung (HSE) is planning to take on a further appr oximately 250,000 PE in addition to the 1.85 m PE already served by its com bined wastewater treatment plants at Kohlbrandhoft/Dradenau. To cope with t he increased load, a concept for the extension of the plants had to be deve loped. Various concepts were compared and evaluated using a dynamic compute r simulation. The very wide-ranging simulation study showed that the required effluent st andards can still be achieved after the volume of the sludge liquor storage capacity has been increased. As many concepts had been assessed in detail, the final solution chosen was considerably less expensive than if the wast ewater treatment plants had been extended in a traditional manner.