This equipment is specifically designed for upgrading and advanced treatment of wastewater treatment systems. When existing biological or physicochemical processes cannot meet higher discharge standards, this system can serve as a final-end advanced treatment unit, efficiently removing residual recalcitrant COD, color, trace organic matter, and toxic substances, helping users achieve stable compliance without relying on large amounts of chemical reagents.

The equipment employs electrochemical oxidation technology, eliminating the need for oxidants or flocculants, producing no chemical sludge, and resulting in low operating costs. Furthermore, the electrode modules do not scale or clog during long-term operation, making it particularly suitable for low-cost, space-saving upgrades of existing facilities.

Why is deep electrochemical treatment necessary?

Common difficulties in raising standards	The role of electrochemical deep treatment
Biological effluent contains residual, non-degradable COD (such as humic substances and some aromatic compounds).	Strong oxidizing groups (·OH, etc.) break down and mineralize the effluent, further reducing COD.
Color exceeds standards (dyeing and printing, chemical wastewater, etc.).	Electro-oxidation destroys chromophores, resulting in colorless and transparent effluent.
Toxic organic matter or inhibitors remain, affecting reuse safety.	Toxicity is reduced, improving the ecological safety of the effluent.
Existing deep chemical treatment processes generate large amounts of chemical sludge, resulting in high disposal costs.	No chemicals or sludge are required, preventing secondary pollution at the source.
Limited site space prevents the construction of large-scale expansion structures.	Modular design, small footprint, and can be flexibly integrated into existing processes.

Working principle

The existing system's effluent enters the electrochemical reactor after passing through a pre-filter. Under the action of electrodes:

Electro-oxidation: Strong oxidizing groups (hydroxyl radicals, OH, etc.) are generated on the anode surface, oxidizing and decomposing residual recalcitrant organic matter and trace pollutants in the wastewater into CO₂, H₂O, or small molecule harmless substances.

Removal of color and odor: Chromogenic groups and odor-causing substances are destroyed, resulting in clear effluent.

No chemical additives: The entire process relies on electricity, introducing no salt or chemical residues; the effluent can be directly reused or discharged.

Treatment that meets standards: The treated effluent can be discharged into receiving water bodies or enter reuse systems (such as landscaping, flushing, cooling tower makeup water, etc.).

Core advantages

Advantages	illustrate
Significantly reduces COD	The COD removal rate for biological effluent is typically 50%~80%, which can reduce COD from 80~150 mg/L to 30~50 mg/L or even lower.
Completely removes color	Electro-oxidation destroys chromophores, achieving a color removal rate of ≥90%, resulting in colorless and transparent effluent.
No chemical reagents required	No sodium hypochlorite, ozone, Fenton's reagent, etc. are added, resulting in no chemical sludge production and zero sludge disposal costs.
Electrode does not scale or clog	Even when treating wastewater containing salt or calcium, the electrode surface remains clean, requiring no frequent cleaning, and has a lifespan of >2 years.
Small footprint, easy to retrofit	The integrated skid-mounted unit requires only inlet and outlet water pipes and power supply, eliminating the need for civil engineering and allowing for flexible placement next to existing structures.
Fully automatic operation	PLC control allows for automatic adjustment of current density based on effluent water quality, enabling unattended operation.

Technical parameters (customizable)

parameter	scope
Processing Capacity	0.5 ~ 200 m³/day (can be scaled up as needed)
Installed Power	3 ~ 150 kW (depending on COD concentration and water volume)
Operating Voltage	0 ~ 20 V (adjustable)
COD Removal Rate	50% ~ 80% (upgraded operating conditions)
Color Removal Rate	≥90%
Residence Time	15 ~ 120 min (depending on water quality)
Equipment Material	PPH / PE / Stainless Steel / Titanium Alloy

Application areas

Urban wastewater treatment plants: Improve wastewater discharge standards, or meet surface water discharge standards.

Industrial park centralized wastewater treatment plants: Improve the removal rate of recalcitrant COD to meet stricter requirements for municipal sewer or direct discharge.

Dyeing and printing wastewater: Remove color and residual dyes at the end of the treatment process to meet new discharge standards.

Chemical, pharmaceutical, and pesticide wastewater: Degrade toxic organic matter in biochemical effluent to meet specific industry discharge limits.

Landfill leachate treatment: Re-treat nanofiltration/reverse osmosis concentrate, or upgrade biochemical effluent standards.

Aquaculture and food processing wastewater: Further reduce COD and color to achieve compliant discharge or reuse.

This equipment can be directly embedded in the existing end-of-process clear water tank or discharge channel without changing the main process.

Why choose us?

Extensive experience in upgrading standards: Completed numerous municipal wastewater, industrial park, and chemical wastewater upgrading projects, with effluent consistently meeting the strictest local standards.

Modular design: Flexible configuration based on water volume and quality, with future scalability.

Long-term scale-free electrodes: Truly solves the challenges points of scale buildup and failure in electrochemical equipment during practical engineering.

Global technical support: Provides remote commissioning, operation training, and long-term spare parts supply.

Tags:

Water Treatment Plant Pharmaceutical Industry

Industrial Wastewater Equipment

Chemical Wastewater Treatment Plant