Wastewater from electroplating facilities, chemical, petrochemical, and other industries may contain chromium, nickel, zinc, lead, iron, copper, manganese, and other heavy metals. Several methods and technological flow diagrams have been developed with the use of AVS Vortex Layer Device to treat wastewater, which allows to reduce significantly the consumption of reagents, to achieve more complete treatment, and to transfer it to a continuous mode. The reduction of hexavalent to trivalent chromium is carried out in an alkaline medium using iron sulfate and the simultaneous precipitation of heavy metals in the form of hydroxides. This method is implemented in wastewater, which has 10–200 mg / l Сr + 6 at the acidity of wastewater from pH = 6 to several grams and the presence of other heavy metals from 10 to 1,000 mg / l Wastewater treatment by reduction of Cr6 in an alkaline environment with simultaneous precipitation of heavy metals in the AVS type BA-100 (ferromagnetic elements: mm; g; before treatment - pH 2 ... 3, after treatment - pH 8.5 ... 9) The experiment of the AVS implementation has shown that it is the most appropriate to use the reduction method of Cr + 6 to Cr + 3 in an alkaline medium with an amount of chromium in solution max. 200 mg / l.Recovery of Cr + 6 to Cr + 3 with sodium bisulfite in acidic medium, followed by the precipitation of Cr + 3 in an alkaline medium using the AVS in both the first and second stages can be recommended with a significant amount of chromium. Intensification and completeness of acid-base wastewater treatment from heavy metal ions using the AVS takes place due to complex treatment of components in the vortex layer due to the formation of metal hydroxides, their precipitation and sorption of heavy metal ions by iron hydroxide, as well as an activated colloid, which is formed due to the dispersion of ferromagnetic elements in the vortex layer and is a good reducing agent. The most effective purification process occurs while implementing a suspension of lime as a reagent, which is activated during processing in the AVS. The activation is confirmed by the IR spectra of CaO of lime milk after treatment in a vortex layer, which indicates structural and physical changes in the properties of CaO. It allows achieving the degree of purification to the GDK standart at a CaO consumption of up to 90-100% of the theoretically required.  For more information about equipment (AVS) please contact me anytime  Best regards:           Stanislav Kopytko                e-mail: kopytko.s.globecore@gmail.com phone:  +38 095 478 2422  WhatsApp, Viber, Messenger              +4 942 136 583 213 www.avs.globecore.com

Published by

Wastewater from electroplating facilities, chemical, petrochemical, and other industries may contain chromium, nickel, zinc, lead, iron, copper, manganese, and other heavy metals. Several methods and technological flow diagrams have been developed with the use of AVS Vortex Layer Device to treat wastewater, which allows to reduce significantly the consumption of reagents, to achieve more complete treatment, and to transfer it to a continuous mode.

The reduction of hexavalent to trivalent chromium is carried out in an alkaline medium using iron sulfate and the simultaneous precipitation of heavy metals in the form of hydroxides. This method is implemented in wastewater, which has 10–200 mg / l Сr + 6 at the acidity of wastewater from pH = 6 to several grams and the presence of other heavy metals from 10 to 1,000 mg / l

Wastewater treatment by reduction of Cr6 in an alkaline environment with simultaneous precipitation of heavy metals in the AVS type BA-100 (ferromagnetic elements: mm; g; before treatment - pH 2 ... 3, after treatment - pH 8.5 ... 9)

The experiment of the AVS implementation has shown that it is the most appropriate to use the reduction method of Cr + 6 to Cr + 3 in an alkaline medium with an amount of chromium in solution max. 200 mg / l.Recovery of Cr + 6 to Cr + 3 with sodium bisulfite in acidic medium, followed by the precipitation of Cr + 3 in an alkaline medium using the AVS in both the first and second stages can be recommended with a significant amount of chromium.

Intensification and completeness of acid-base wastewater treatment from heavy metal ions using the AVS takes place due to complex treatment of components in the vortex layer due to the formation of metal hydroxides, their precipitation and sorption of heavy metal ions by iron hydroxide, as well as an activated colloid, which is formed due to the dispersion of ferromagnetic elements in the vortex layer and is a good reducing agent.

The most effective purification process occurs while implementing a suspension of lime as a reagent, which is activated during processing in the AVS. The activation is confirmed by the IR spectra of CaO of lime milk after treatment in a vortex layer, which indicates structural and physical changes in the properties of CaO. It allows achieving the degree of purification to the GDK standart at a CaO consumption of up to 90-100% of the theoretically required. 

For more information about equipment (AVS) please contact me anytime

 Best regards:

          Stanislav Kopytko

               e-mail: kopytko.s.globecore@gmail.com
phone:  +38 095 478 2422  WhatsApp, Viber, Messenger

             +4 942 136 583 213

www.avs.globecore.com