Wastewater management for the vegetable processing industry

Aug 2, 2019

The vegetable processing industry is one of the most complex industries in the agri-food sector due to the great variety of raw materials, industrial processes used, as well as final products. Salher studies the most efficient methods to treat wastewater derived from these processes.

The cleaning of the raw material is an operation which can be carried out one or several times throughout the process in order to eliminate undesirable substances.

The water used in the production process must be treated before being discharged. This way the volume of wastewater generated is important.

Regarding the pollutant load of these discharges which basically contains organic matter and solids in suspension, its presence and concentration depend on several aspects: type of raw material, production system employed, level of production, type of industry, etc.

For a salad packaging plant (lettuce, broccoli, spinach, kale) located on the outskirts of Warsaw (Poland), Salher has proposed in 2011 a facility with a capacity of up to 100 m3/day which includes:

  • A pumping station with a flow meter
  • Pre-treatment prior to the secondary treatment with the helical screw. (Reference: TA-HEL),
  • Secondary treatment of low load active sludge, with nitrogen removal by biological means (nitrification – denitrification) and clarification process in compact tank (Reference: CHC-OXI-REC-C-ANOX),
  • Biological sludge storage tank,
  • Oximeters,
  • Deodorization, reference CARBO-SAC.

Due to an increase in the production, the plant again required the engineering services of Salher.

The new WWTP designed, manufactured and set up by Salher has a treatment capacity of 400 m³/dayand has the following elements:

Salher solutions for industrial waters

Find our more about the treatments offered by our company for the waters of the different industries.

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