Electrochemical wastewater treatment equipment for treating acidic wastewater

Product Specification

Product Overview

This equipment is specifically designed for the treatment of acidic wastewater. Acidic wastewater is widely generated in industries such as chemical engineering, medicines, electroplating, hydrometallurgy, battery manufacturing, mine drainage, steel pickling, and electronic etching. It typically contains high concentrations of hydrogen sulfide (H⁺), heavy metal ions, dissolved organic matter, and other reducing agents. Traditional treatment methods primarily rely on neutralization and precipitation, requiring large amounts of alkali and generating substantial amounts of chemical sludge. This not only results in high operating costs but also presents difficulties in sludge disposal, causing secondary pollution.

This system employs electrochemical oxidation-reduction technology, efficiently degrading organic matter and removing toxicity from acidic wastewater without the addition of chemical reagents. The equipment offers significant advantages, including no need for large amounts of alkali, significantly reduced sludge production, no electrode scaling or clogging, and low operating costs. The treated wastewater meets subsequent treatment requirements or can be directly discharged in compliance with standards.

The challenges points of acidic wastewater treatment and the solutions provided by this equipment

Working principle

Acidic wastewater enters the electrochemical reactor after pre-filtration. Under the action of electrodes:

* Electro-oxidation: Strong oxidizing groups (hydroxyl radicals, OH, etc.) are generated at the anode, with even stronger oxidizing power under acidic conditions, rapidly degrading organic pollutants (such as phenols, dyes, surfactants, etc.), significantly reducing COD and toxicity.

* Indirect oxidation/chlorination: If the wastewater contains chloride ions, active chlorine is generated at the anode, continuously oxidizing organic matter and reducing substances.

* The treated effluent can enter a neutralization system (if pH adjustment is required) or be directly discharged into a biological treatment system.

Core advantages (for acidic wastewater)

Technical parameters (customizable)

Scope of application

Steel pickling wastewater: Contains hydrochloric acid/sulfuric acid, iron ions, small amounts of oil and corrosion inhibitors. Electrochemical oxidation can oxidize organic matter and reduce the COD of the pickling solution, facilitating acid recovery or subsequent treatment.

Electroplating and surface treatment acidic wastewater: Contains heavy metals such as copper, nickel, chromium, and zinc, as well as complexing agents (citric acid, EDTA, etc.). Electro-oxidation destroys complexes, and electro-reduction recovers metals.

Chemical and pharmaceutical acidic mother liquor: pH 1-3, containing high concentrations of organic matter (nitrobenzene, aniline, halogenated hydrocarbons, etc.).

Wet metallurgical extraction residue: Contains residual organic extractants and rare and dispersed metals. Electro-oxidation removes the organic phase.

Battery manufacturing acidic wastewater: Contains cobalt, manganese, lithium, and organic matter. Electrochemical treatment synergistically removes organic matter.

Process Flow

Option 1: Separate Treatment (Discharge to Standards or Reuse)

Acidic Wastewater → Equalization Tank (Homogenization) → Electrochemical Treatment Equipment → Neutralization (If Required) → Sedimentation/Filtration → Discharge or Reuse

Option 2: Pretreatment (Reducing Biochemical Load)

Acidic Wastewater → Electrochemical Pretreatment (Removal of Toxic Organic Matter) → Neutralization → Biochemical System → Discharge

Why Choose Us?

Acid-Resistant Electrodes: Dedicated anodes, resistant to acidic oxidation and corrosion, long service life.

No Scale Formation: No risk of scale formation in acidic environments, long-term stable operation.

Modular and Easy-to-Integrate: Can be flexibly embedded into existing wastewater treatment systems.