Electrocatalytic oxidation wastewater treatment system

Electrocatalytic oxidation wastewater treatment system

The electrocatalytic oxidation process used in electrocatalytic oxidation equipment has been very mature, and is widely used in chemical and oil fields, electroplating wastewater, papermaking wastewater, dyeing and printing wastewater and other high-concentration and difficult to degrade wastewater treatment, the treatment effect is good, and the initial investment and the later operating costs are very low, the electrocatalytic oxidation of the specific treatment of wastewater systems in detail, let's understand. Electrocatalytic oxidation technology principle, electrocatalytic oxidation wastewater treatment system technology characteristics:

I. Electrocatalytic oxidation technology principle

(1) electrolytic flocculation

? The use of soluble anodes such as iron and aluminum, DC current, the anode loses electrons, the formation of metal cations Fe2+, Al3+, through a series of hydrolysis, polymerization and oxidation process, the formation of a highly active adsorption flocculation group, its adsorption capacity is very strong, so that the water colloidal impurities, suspended impurities cohesion precipitation separation. At the same time, the charged pollutant particles swim in the electric field, part of its charge is neutralized by the electrode and prompted its destabilization and aggregation. The flocculation effect is better than ordinary flocculants.

(2) Electrolytic oxidation

? Under the action of DC electric field, all kinds of pollutants in wastewater directly in the anode of the electrode plate to lose electrons and oxidation reaction occurs, and at the same time the use of electrode potential in the solution of lower anions, such as OH-, Cl- in the anode surface to lose electrons to generate new stronger oxidant active substances, such as [O], [OH], ClO-, etc. . These active substances are used to oxidize and decompose BOD5, COD, etc. in water.

(3) Electrolytic reduction

? Wastewater in the electrolysis process, the cations in the pollutants first get electrons at the cathode, so that the electrolyte in the high-value or low-value metal cations get electrons at the cathode is directly reduced to low-value cations or metal precipitates.

(4) Electrolytic air flotation

? Electrolytic air flotation is the electrolysis of wastewater, water molecules ionized to produce H + and OH -, driven by the electric field of directional migration, and precipitated on the surface of the cathode plate and anode plate, respectively, hydrogen and oxygen. The diameter of the newly generated bubbles is very small, about 10-30μm, and the bubble dispersion is high, as a carrier adhering to the suspended solids in the water and floating, to achieve the removal of pollutants and impurities particles.

Second, electrocatalytic oxidation wastewater treatment system technical characteristics

(1) low investment costs, low operating costs, treatment of tons of water power consumption of about 0.15-0.5 degrees / ton of water.

(2) No need to add any chemicals.

(3) Small footprint, simple operation, high degree of automation.

(4) The equipment has short processing time and high processing efficiency.

(5) Adapt to a wide range of wastewater, can deal with a variety of pollutants.

(6) The equipment produces less sludge and high sludge compactness.