SIKA LIMITED VIETNAM WASTEWATER TREATMENT SYSTEM PROJECT

Investor: SIKA Limited Vietnam
Location: Nhon Trach District, Dong Nai Province
Capacity: 150 m³/day
Designer & Contractor: VIET WATER JOINT STOCK COMPANY (VIET WATER JSC)
Website: www.vietwaterjsc.com
Technical Hotline: +84 904 506 065

1. Project Overview

The SIKA LIMITED Vietnam Wastewater Treatment System marks a significant collaboration between SIKA Vietnam—a leading manufacturer of construction additives—and VIET WATER JSC, an experienced specialist in industrial wastewater treatment design and construction.

With a treatment capacity of 150 m³/day, the system is engineered not only to meet national environmental standards (QCVN 40:2011/BTNMT – Column A) but also to support sustainable development and water reuse initiatives within the factory.

2. Technical Challenges of SIKA’s Wastewater

Wastewater generated from SIKA’s Polymer and Latex additive production contains high concentrations of organic and chemical pollutants, including:

• COD: > 40,000 mg/L

• BOD₅: ~2,000 mg/L

• TSS and polymer oil exceeding the permissible limit by dozens of times

This wastewater type is highly viscous, difficult to biodegrade, and rich in emulsified oils, making it challenging for conventional biological systems.
Therefore, selecting a tailored and integrated treatment technology was essential to ensure:

• Optimal pollutant removal efficiency

• Stable long-term system operation

• Compliance with all environmental discharge standards

3. Treatment Technology and Process by VIET WATER

Flow Diagram of the Treatment Process

4. Step-by-Step Treatment Process

4.1. Mechanical Pretreatment – Removing Solid Impurities

Raw wastewater passes through a fine wedge-wire screen to remove coarse solids and floating debris.
It then enters an oil and grease separator, where light materials and emulsified polymers are separated from the water surface.

Result: Up to 70% TSS reduction, significantly decreasing the load for subsequent chemical and biological stages.

4.2. Physico-Chemical Treatment – Two-Stage Coagulation & Flocculation

In the coagulation–flocculation reactors, chemicals are dosed sequentially:

1. NaOH: Adjusts pH for optimal reaction conditions

2. PAC/Alum: Aggregates fine colloids into larger flocs

3. Polymer: Enhances floc formation and settling efficiency

This dual-stage process effectively removes dissolved organics, emulsified oils, and fine particles, significantly reducing COD and turbidity.
The system is equipped with automated pH and TSS sensors, ensuring stable and precise operation under fluctuating loads.

4.3. Advanced Oxidation – Ozone Treatment

Next, the water enters the Ozone oxidation tank, where ozone acts as a strong oxidant to:

• Break down refractory organic compounds

• Disinfect and decolorize the wastewater

• Detoxify inhibitory substances for biological treatment

Key Benefit: The combination of Ozone and MBR technology enhances overall system performance, producing clear, odorless, and safe effluent.

4.4. Biological Treatment – Anoxic, Aerobic, and MBR Integration

The biological system consists of:

• Anoxic Tank: Converts nitrate (NO₃⁻ → N₂) to remove nitrogen compounds

• Aerobic Tank: Aerobic microorganisms degrade dissolved organic matter, reducing BOD and COD

• MBR Tank (Membrane Bioreactor): Combines filtration and biological degradation to remove residual solids, bacteria, and sludge

All parameters such as DO, pH, temperature, and TSS are continuously monitored and automatically controlled.
The microbial community is regularly maintained to ensure optimal biological stability and efficiency.

4.5. Sludge Handling and Final Disinfection

Sludge generated during treatment is dewatered using an automatic sludge press, minimizing disposal volume.
Treated water is disinfected using Chlorine or UV before final discharge.

Outcome: Effluent consistently meets QCVN 40:2011/BTNMT – Column A, suitable for reuse in cooling or irrigation purposes within the facility.

5. Project Achievements and Environmental Impact

The project was implemented through:

• 800+ hours of on-site research and pilot testing

• 400+ hours of joint engineering workshops

• 940+ hours of installation and commissioning

The result is a fully automated, precise, and energy-efficient system, ensuring stable long-term operation.

Key Impacts:

• Reduces environmental pollution in Nhon Trach Industrial Area

• Helps SIKA comply with national environmental standards

• Promotes sustainable water management and reuse

6. VIET WATER’s Standard Working Process

1. Site Survey & Wastewater Analysis

2. Technical Consulting & Technology Selection

3. Detailed Design & Cost Estimation

4. Construction & Equipment Installation

5. Trial Operation, Testing & Handover

6. Maintenance, Technical Support & Upgrades

VIET WATER accompanies clients throughout the entire lifecycle of the system, ensuring sustainable and efficient operation.

7. Why SIKA Chose VIET WATER

• Extensive Experience: 15+ years specializing in industrial wastewater treatment.

• High Quality: Advanced, energy-efficient solutions meeting global standards.

• Expert Team: Skilled engineers with hands-on field experience.

• Comprehensive Service: From environmental documentation to turnkey construction.

• Commitment: Timely delivery, guaranteed water quality, and long-term support.

8. Contact Information

VIET WATER JOINT STOCK COMPANY (VIET WATER JSC)
Website: https://www.vietwaterjsc.com
Technical Hotline: +84 904 506 065
Factory: Tam Phuoc Industrial Zone, Bien Hoa City, Dong Nai, Vietnam
 Email: info@vietwaterjsc.com

VIET WATER – Comprehensive environmental solutions for industrial wastewater treatment, committed to green, sustainable, and efficient development.