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

Common challenges points:	Electrochemical Solution
Neutralization requires large amounts of alkali, resulting in high costs.	The electrochemical process directly oxidizes organic matter under acidic conditions, eliminating the need for pre-neutralization. If neutralization is required, adjusting the pH after treatment saves on alkali consumption.
It generates large amounts of chemical sludge (calcium sulfate, hydroxides, etc.).	No chemical sludge is produced, only a small amount of scum or metal deposits (which can be recycled) are generated by electrochemical processes.
Acidic wastewater often contains recalcitrant organic matter, and even after neutralization, standards may still not be met.	Electro-oxidation directly breaks down organic matter through chain scission, achieving a COD removal rate of 60%~90%.
Heavy metal ions require precipitation for removal, resulting in large amounts of reagents.	Electro-reduction can recover some metals (such as copper and silver) at the cathode, reducing the amount of precipitant used.
Treatment of fluoride- and phosphoric acid-containing wastewater is difficult.	Electrochemistry can assist in the removal of fluorine and phosphorus (through synergistic precipitation or oxidation).
Equipment is prone to corrosion under acidic conditions.	Corrosion-resistant electrodes and PP/titanium reactors ensure long-term stable operation.

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)

Advantages	Description
No pre-neutralization required	Electrochemical treatment can efficiently oxidize organic matter even under acidic conditions (pH 2-6), saving significant investment in alkali agents and neutralization equipment.
Significantly reduces sludge	No lime/caustic soda is added, avoiding the generation of large amounts of calcium sulfate or heavy metal hydroxide sludge, thus reducing sludge disposal costs.
Highly efficient at degrading organic matter	COD removal rate is 60%-90%, especially suitable for acidic wastewater containing benzene compounds, phenols, dyes, surfactants, and other recalcitrant organic matter.
Electrode does not scale or clog	The acidic environment itself inhibits scaling; combined with special electrodes, the electrodes remain clean for a long time, with no electrode wear and a long lifespan.
Safe operation	Operates at normal temperature and pressure, requiring no high temperature or high pressure; no hazardous chemicals are added, reducing on-site safety risks. PLC control automatically adjusts the current according to water quality, requiring unattended operation.
Fully automatic operation	Description

Technical parameters (customizable)

Parameters	Range
Processing Capacity	0.5 ~ 200 m³/day
Installed Power	3 ~ 150 kW (depending on COD and water volume)
Operating Voltage	0 ~ 20 V (adjustable)
Applicable pH Range	2 ~ 6 (can be directly treated, no neutralization required)
COD Removal Rate	60% ~ 90%
Hydraulic Retention Time	20 ~ 90 min
Equipment Material	PPH / PE / Stainless Steel / Titanium Alloy

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.

Tags:

Water Treatment Plant Pharmaceutical Industry

Industrial Wastewater Equipment

Chemical Wastewater Treatment Plant