Polen 2011

High-quality food, gentle waste water treatment

In order to increase the existing waste water treatment plant’s performance, H+E implemented an anaerobic ANAFIT®.R2S reactor and a flotation plant at Farm Frites.

Farm Frites, a global manufacturer of potato products, expanded its production in Lebork, Poland, to over 35 different potato products in 2011. Previously, production wastewater was treated in an aerobic wastewater treatment plant and then discharged into the municipal wastewater treatment plant. The wide range of products had a significant impact on the wastewater treatment, including a strong increase in chemical oxygen demand, also known as COD load. To increase the existing waste water treatment plant’s performance, Farm Frites opted for the ANAFIT®.R2S anaerobic reactor from H+E with an upstream flotation unit.

Wide-ranging in-house development

Depending on the application, this anaerobic reactor can be combined with various technical processes. The wastewater from potato processing contains a lot of grease, which must be removed before entering the ANAFIT®.R2S reactor. H+E therefore designed and delivered a DAF (dissolved air flotation) unit upstream of the ANAFIT®.R2S. Since this is done without chemicals, only the grease is separated. By far the greater part of the COD load reaches the R2S reactor where it is converted into biogas. The COD degradation rates are between 80 and 90 per cent.

Wastewater residues become biogas

After pre-cleaning by dissolved air flotation, the wastewater is fed into a buffer tank where it is acidified, among other things. At the end of the process is the anaerobic reactor connected to a conditioning tank. The COD load is diluted and reduced to the greatest possible extent. The biogas produced in the ANAFIT®.R2S is then converted into electricity and heat in a combined heat and power unit (CHP).

Facts & Figures

  • Degradation of organic pollutant load in the smallest possible space
  • Reduction of operating costs
  • Production of biogas used to generate electricity in the CHP
  • Reduction of more than 80 per cent of the COD load