Treatment of wastewater from ice cream manufacturing

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Case Study: Ice Cream Factory

An industrial ice cream manufacturing plant required a solution for the treatment of wastewater as a product of the manufacture of ice cream, in order to comply with the discharge limits to the sewer network.

It is a factory located in Valencia with more than 20 years of tradition manufacturing ice cream and marketing its products throughout Spain.

According to EPSAR, the maximum water sanitation entity of the Valencian Community, the limits of wastewater discharge are 500 mg / L for suspended solids and 1000 mg / L for Chemical Oxygen Demand (COD), as the parameters most relevant to the present case study.

Characteristics of wastewater in the ice cream industry

The wastewater from the ice cream industry mainly contains residues composed of organic matter and suspended solids, from the raw materials used to make ice cream: cow's milk and fruit, which contain high concentrations of fat and protein.

One of the environmental commitments of this ice cream company is to develop the best possible practices to prevent pollution, optimize the consumption of natural resources, and promote energy efficiency.

Therefore, treating the wastewater they use for their productions is one of their priorities in terms of corporate social responsibility and it has been our challenge as specialists in the manufacture of systems for the clarification of industrial waters.

Solution: Purify and clarify wastewater in the ice cream industry

So that this ice cream company in question could comply with current legislation regarding water treatment, at SIGMADAF Clarifiers we have designed, manufactured, and supplied two flotation equipment: an ACAF100 and a DAF-FPAC120

Both units have been installed as part of the industrial wastewater treatment plant (EDARI) of the ice cream manufacturing factory and will serve:

  • The ACAF induced air flotation system to reduce suspended oils, fats, and organic matter.


  • The DAF-FPAC120 dissolved air flotation solution system to act as part of a biological FBR type treatment system, clarifying the water from the biological reactor prior to it for subsequent discharge to the sewer system, complying with current environmental requirements.



The function of our flotation equipment is to separate the maximum of total suspended solids, eliminating the associated COD (chemical oxygen demand) and thus obtaining the adequate performance for each of the purification stages.

In the table below you can see the performance of these equipments, in whose values we have highlighted the performance obtained from COD:

ApplicationIce cream factory
DescriptionPre-treatment (ACAF) and FBR (DAF)
  • ACAF100
Design Flow1000 m3/day
COD YIELD entry into WWTP average 15,000 mg/L

COD maximum input 20,000 mg/L

COD output to WWTP average 150 mg/L


Regarding the operating flow rates, the DAF-FPAC120 receives up to 40 m3 / h and the total suspended solids charges (SST) that it receives from the biological reactor are between 10 and 12 g / L.

If we compare the COD parameters shared at the beginning of the publication and the equipment performance results, this industrial ice cream factory adequately meets the sewer discharge limit for this specific community.

This type of facility also has its application in water treatment plants for the dairy industry.

If you want more information about our this product or any of our equipment for the treatment of industrial wastewater, do not hesitate to contact us.

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