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DP 4 ELECTRO

ELECTROCOAGULATION COMPACT PLANT

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BASIC PRINCIPLES

In electro-coagulation plant, process is realized by an electrolytic cell where anodes and cathodes are connected with a DC generator.

At the ANODE reaction is

Al (metal) ==== Al 3+ + 3 e-

At the CATHODE reaction is

2 H2O + 2 e- ===== H2 + 2 OH-

 

In aqueous environment,

Al3+ + 3 H2O ==== Al(OH)3 + 3H+

 

Total Reaction is

2Al(metal) + 6H2O + 2 OH- ==== 2 Al(OH)4- + 3 H2 (gas)

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Aluminium Hydroxyls create a flocculation and on the flocks surface, all suspended material (Oil, fats, dyes, paints...) are quickly absorbed.

Hydrogen developing improves the floatation of suspended materials.

In the second part of flocculation tank, floating material is aggregated by special aqueous Polymer dispersion ( series HYCRAM ELECTRO) and flocks passes to filtration.

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TYPICAL GENERATOR CHARACTERISTICS

FEEDINGPower 400 VA three phasesFrequency 50 – 60 HzPower absorbed 8,6 KWA

GENERATED DIRECT CURRENT (DC)Current 300 APotential 24 VPower (theory) 8,6 KWARegulation 0-100 %

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TYPICAL ELECTRODES ASSEMBLY

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Retention time in electrolytic cell is regulated by calibrating starting process by our Technical Service.Substantially, retention time is connected with Aluminium Hydroxyls formation.Such parameter is regulated by Faraday’s Law m = 1/95600 * A / V * I *tWhere m = mass in grams of Aluminium dissolved A = Atomic Mass of Aluminium ( 27)V = Valence of Aluminium ( 3)I = Current (Amperes)t = time in second   By our proprietary software we can evaluate the connections between : Flow-rate of wastewaterRetention time in electrolytic cellAluminium dissolvedEquivalent to Aluminium Hydroxyls compounds

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DP 4 ELECTRO GENERAL VIEW

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DP 4 ELECTRO RENDERING