Advanced Solutions for High-Strength and Refractory Wastewater Treatment

1. Challenges in Industrial Wastewater Treatment

In many industries such as chemical, pharmaceutical, textile dyeing, food, plastic, and electronics, wastewater often contains extremely high levels of pollution with characteristics such as:

• COD ranging from 2,000 to 50,000 mg/L

• High nitrogen concentration (ammonium, nitrate, nitrite)

• Complex, non-biodegradable organic compounds, toxic substances, stable colorants, solvents, and phenols

• Inefficient treatment by conventional biological processes

Such wastewater requires advanced oxidation and stable treatment systems with low operating costs, particularly suitable for FDI factories with strict environmental standards in Vietnam.
 

2. Advanced Treatment Technologies

BDD Electro-Catalytic Oxidation (Boron Doped Diamond)
Utilizes boron-doped diamond electrodes that generate hydroxyl radicals (•OH) with a high oxidation potential (~2.8V), capable of completely decomposing persistent organic compounds.
Achieves excellent COD removal without generating chemical sludge.
Stable and safe operation, ideal for tertiary or polishing treatment.

Titanium–Iridium (Ti–Ir) Electro-Oxidation

An advanced oxidation process using durable electrodes with lower investment costs compared to BDD.
Suitable for post-biological or pre-discharge treatment.
Low energy consumption, stable operation, and long electrode lifespan.

Catalytic Fenton and Multi-Phase Fenton Systems
Combines the Fenton reaction (Fe²⁺/H₂O₂) with solid or multi-phase catalysts to accelerate hydroxyl radical generation.
Highly effective in removing color, aromatic rings, phenols, and organic solvents.
Reduces chemical consumption, minimizes iron sludge, and improves COD/TOC removal efficiency.

Ozone–Fenton Catalytic Oxidation
Simultaneous application of ozone and catalytic Fenton to create stronger oxidation radicals.
Highly effective for wastewater containing antibiotics, odors, or toxic organic compounds.
Capable of deep COD and TOC reduction, meeting strict discharge standards (Class A or higher).

IC High-Rate Anaerobic Reactor (Internal Circulation)

A high-performance anaerobic biological process with COD loading rates up to 20–30 kgCOD/m³·day.
Generates biogas for energy recovery and cost savings.
Ideal as a pre-treatment stage for high-COD wastewater, reducing 60–80% of the organic load before aerobic treatment.
Proven effective for complex wastewater such as pharmaceutical, food, starch, organic chemical, and ink production.


Ammonia Stripping (Air Stripping / Thermal Desorption)

Applied to wastewater with high ammonia concentrations (NH₄⁺ > 500 mg/L).
Uses heat, aeration, and neutralization to remove up to 90–95% of total nitrogen.
Reduces nitrogen load on biological stages, ensuring stable long-term operation.

3. Key Advantages

• COD removal efficiency of 90–99%, meeting the highest discharge standards

• 30–50% lower operating costs compared to conventional systems

• Minimal or no chemical sludge generation

• Stable operation under variable load conditions

• Modular design, easy to upgrade or integrate into existing systems

4. Practical Applications

These technologies have been successfully applied to:

• Japanese, Korean, and Chinese FDI factories in Vietnam

• Chemical, pharmaceutical, textile dyeing, food, and plastic industries

• Wastewater systems requiring high effluent quality

• Industrial zones with complex and non-biodegradable wastewater

• Real projects with treatment capacity up to 75,000 m³/day, ensuring stable efficiency and optimized OPEX

5. Contact for Consultation

We provide total solutions – from design, fabrication, and installation to operation guidance for industrial wastewater treatment systems.
Our goal is to help enterprises achieve maximum treatment efficiency with minimum operating cost.
Contact us for a tailored technology consultation for your specific wastewater type.