Wastewater treatment in waste recovery

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Case Study: Wastewater treatment in a waste recovery plant

A waste processing and recovery plant required a wastewater treatment solution to avoid the excessive entry of suspended solids into its biological water treatment.

The company in question manages industrial waste through various lines of services: phase separation, physical-chemical and biological treatment, preparation of liquid fuels and, in addition, it is a transfer centre for waste contaminated with polychlorinated biphenyls (PCBs).

The industrial wastewater processed in the treatment plant (EDARI) of this waste recovery plant contains high loads of solid, dangerous and non-dangerous pollutants, which require elimination before biological treatment.

The water flows of the WWTP are about 5-10 m3/ h and the total loads of suspended solids (TSS) to be treated are 2000 mg / L, being able to reach peaks of 4000 mg / L.

Physical-Chemical Pre-treatment with a DAF-FPAC

The solution designed, manufactured and supplied by SIGMADAF Clarifiers consisted of installing a DAF-FPAC10 as a pre-treatment of wastewater in the waste recovery plant, with the aim of eliminating as much as possible the contaminants present in the water before biological treatment.

The DAF-FPAC is a dissolved air flotation equipment ideal for treating industrial wastewater that contains very high loads of solids and other suspended pollutants to be removed.

It is a versatile system that has application in various industrial sectors, such as biological flotation reactors (FBR), sludge thickeners, rendering, in the meat industry and in poultry, pig and cow slaughterhouses, in companies that produce food, in industry. mining, petrochemical and paper, among others.

The function of this DAF-FPAC10 flotation equipment is to separate and eliminate total suspended solids (TSS) from these complex waters, functioning as a physical-chemical treatment in order to condition these waters for subsequent biological treatment.

This physical-chemical process eliminates more than 90% of the suspended solids, with which the biological reactor can always work under the best conditions.

Here are some photos with the Jar-Test trials where the effectiveness of this pre-treatment can be visually verified.

Jar Test of treated wastewater after physical-chemical process with Sigmadaf's DAF-ACAF10 equipment.

On the left, an example of water to be treated and on the right, water with the solid matter separated after applying the physicochemical treatment.


Wastewater recovery plant

DescriptionPhysical-Chemical Treatment
Flow5-10 m3/h

SST 2.000 mg/L average input

SST 4.000 mg/L máximum input

SST output 150 mg/L


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