Turning Sodium Sulfate into Sulfuric Acid and Caustic Soda: A Large-Scale Bipolar Membrane Success Story
Turn High-Salinity Wastewater into Sulfuric Acid & Caustic Soda Onsite
Lanran’s Bipolar Membrane Electrodialysis (BPED) system enables industries to directly convert sodium sulfate in wastewater into reusable industrial chemicals: Sulfuric Acid (H₂SO₄), Caustic Soda (NaOH).
Reduce chemical procurement costs, minimize waste disposal, and build a closed-loop production system.
Why Industrial Companies Choose BPED
The industrial park in Tumxuk City hosts textile, viscose fiber, chemical, and pharmaceutical industries, generating large volumes of high-salinity wastewater, with sodium sulfate as the main component.
Traditional treatment via evaporation and crystallization faces key limitations:
High energy and operating costs
Limited product market value
High transportation and disposal expenses
Continuous demand for externally purchased acids and alkalis
These challenges significantly increase overall production costs for local industries.
A Better Solution: Bipolar Membrane Electrodialysis (BPED)
Lanran BPED technology transforms sodium sulfate into valuable chemicals directly within your plant.
How does it work?
Electric field-driven membrane separation converts Na₂SO₄ into:
Acid (H₂SO₄) for process use
Alkali (NaOH) for production and wastewater treatment
This creates a closed-loop chemical system that replaces external chemical purchases.
Proven Industrial Performance
A large-scale project in Xinjiang demonstrates real industrial impact:
Feed concentration: ~260 g/L Na₂SO₄
Capacity: 8.61 m³/h
Annual salt conversion: >15,000 tons
Annual NaOH output: ~8,500 tons
Annual H₂SO₄ output: >10,000 tons
The system is estimated to reduce chemical procurement costs by approximately 60 million RMB per year, while maintaining significantly lower energy consumption compared with conventional chemical supply chains.
Key Advantages
- Reduce Operating Costs – Lower chemical procurement and waste treatment expenses
- Improve Resource Efficiency – Convert waste streams into valuable products
- Enable Circular Production – Build a closed-loop acid-alkali system
- Scalable Industrial Design – Modular systems for flexible capacity expansion
- Intelligent Operation PLC-controlled automation with stable performance
Ideal Applications
- Textile & viscose fiber industry
- Chemical manufacturing
- Pharmaceutical wastewater treatment
- Industrial brine management
- Zero liquid discharge (ZLD) systems
Start Reducing Your Chemical Costs Today
Upgrade your wastewater treatment system into a chemical recovery unit.
Contact us to evaluate your project and receive a customized BPED solution.
Turn waste into value. Improve efficiency. Build a sustainable production system.
