Sappi AG, Industrial Wastewater Treatment, Germany
Client:Sappi Alfeld AG
Capacity:30 t CSB/d


  • Anaerobic wastewater treatment plant for pulp and paper industry effluents. The existing biological treatment was extended by a new integrated anaerobic treatment plant.
  • The anaerobic stage comprises 5 reactors connected in parallel and having a volume of around 4,000 m3. After commissioning of the extended plant the COD concentration of final effluents is decreased by about 25%, the BOD level by more than 50%. The total amount of excess biological sludge could be decreased by about 50%. Furthermore, the biogas production has been significantly increased.
  • Technology:
    • Anaerobic cleaning stage