About us
Hangzhou Lanran Tech stands as a global leader in the manufacturing of ion exchange membranes, with an impressive annual output of 1,850,000m2.
We specialize in delivering tailored membrane solutions and advanced equipment to meet the specific needs of our clients, combining flexibility and efficiency with exceptional service.
wholly-owned companies
6
plants
4
sales offices
3
employees
380
R&D
5 R&D centers
176 highly skilled technical professionals
43 invention patents
62 utility model patents
Lanran’s dedicated R&D team works closely with customers to develop solutions that precisely align with their application requirements. From laboratory-scale trials to pilot projects and full-scale industrial production, we offer comprehensive expertise across all stages of equipment development, including integrated modular systems.
Industry solutions
Suatainability
Sustainability drives our innovation. We develop solutions that help industries thrive while reducing their environmental footprint. From advancing the circular economy to combating climate change, our technologies focus on preserving natural resources, reducing pollution, and promoting responsible water management. Our vision is a future where industrial growth aligns with environmental stewardship, fostering sustainable progress for generations to come.
Team Building
“Industrial cleanliness, Resource Hanmony”
At Lanran, we believe strong teams create innovative solutions. Our team-building activities foster collaboration, creativity, and trust, ensuring a vibrant workplace culture that drives excellence. We cultivate the synergy to redefine separation and refine solutions, delivering cutting-edge technologies to our valued clients.
News
Rising Sulfuric Acid Costs Are Changing How Industries Handle Waste Salt
As industries face rising sulfuric acid prices, stricter wastewater discharge regulations, and growing pressure to improve resource efficiency, more manufacturers are turning to Bipolar Membrane Electrodialysis (BPED) technology for industrial brine treatment and chemical recovery. A BPED system for sodium sulfate recovery and industrial waste salt recycling has recently been successfully commissioned in Ningxia, China, demonstrating a practical approach to converting high-salinity wastewater into valuable reusable resources. The project is designed to treat sodium sulfate-rich nanofiltration concentrate generated from industrial wastewater processes. Instead of treating the stream as waste, the system enables resource recovery and supports zero liquid discharge (ZLD) and circular manufacturing strategies. Project Overview • Technology: Bipolar Membrane Electrodialysis (BPED)• Application: Sodium sulfate recovery & industrial brine recycling• Feed Stream: Sodium sulfate-rich brine containing trace NaCl• Current Feed TDS: ~100 g/L• Original Design Feed TDS: 190–210 g/L The original process design utilized dissolved sodium sulfate solids recovered from nanofiltration concentrate. Following pretreatment processes including ozone oxidation, resin purification, ultrafiltration, and decarbonization, the feed solution entered the BPED system for further conversion and resource utilization. One of the key challenges of this project was fluctuating onsite feedwater quality. Despite significant variations between actual operating conditions and the original design parameters, the BPED system maintained stable, continuous operation throughout commissioning. This project highlights several important advantages of membrane-based acid and alkali recovery technologies: ✔ Stable operation under complex and variable brine conditions✔ Reduced dependence on externally purchased sulfuric acid and caustic soda✔ Lower hazardous waste treatment and disposal costs✔ Efficient treatment of high-salinity industrial wastewater✔ Support for zero liquid discharge (ZLD) systems✔ Flexible integration with existing wastewater treatment infrastructure✔ Improved industrial resource recovery and circular utilization With increasing global demand for sulfate waste recovery, sustainable chemical recovery, and industrial wastewater reuse, BPED technology is becoming an increasingly important solution for industries including chemicals, mining, lithium battery materials, metallurgy, and environmental engineering. Backed by in-house ion exchange membrane manufacturing, electrodialysis stack production, and integrated BPED system engineering capabilities, LANRAN provides customized solutions for complex industrial separation and resource recovery applications worldwide.
LANRAN Mamicuo Salt Lake Bipolar Membrane project
We’re honored to be featured by the Membrane Industry Association of China for our Mamicuo Salt Lake Bipolar Membrane project in Tibet, China. At an altitude of 4,400 meters, LANRAN’s BPED system is helping transform post-lithium extraction NaCl wastewater into reusable hydrochloric acid and caustic soda — supporting resource recovery, closed-loop production, and zero-liquid-discharge goals in the salt lake lithium industry. The project is built around our 110-type bipolar membrane stack, designed for:✔ High efficiency✔ Lower energy consumption✔ Compact footprint✔ Reliable operation in harsh plateau environments Once operational, the system will help reduce dependence on externally purchased chemicals while enabling sustainable reuse of wastewater streams. This project reflects how electrodialysis and bipolar membrane technologies can support greener lithium extraction and circular resource utilization in challenging industrial environments. Special thanks to the Membrane Industry Association of China for sharing this story. Read the original article here: https://mp.weixin.qq.com/s/pbb1weei7zhZlFArfoCpGA
Sodium Sulfate to Acid & Alkali via BPED
A 10,000 t/y Resource Recovery Project in Xinjiang’s Textile Industry As the first electrodialysis application in Xinjiang’s textile industry, this project demonstrates how Bipolar Membrane Electrodialysis (BPED) converts sodium sulfate solid waste into reusable sulfuric acid and caustic soda. Using a streamlined process of dissolution → BPED conversion → concentration → internal reuse, the system enables on-site chemical regeneration and supports a more sustainable, cost-efficient production model. Project Overview Location: Xinjiang, China Industry: Textile (Viscose Fiber) Technology: Bipolar Membrane Electrodialysis (BPED) Capacity: 10,000 tons/year of sodium sulfate solid waste Key Outputs： ~5,400 tons/year NaOH (100% basis) ~7,249 tons/year H₂SO₄ (93%) Economic Value： Estimated > RMB 30 million/year (based on reference market prices: NaOH RMB 3,000/t; H₂SO₄ RMB 2,000/t) Project Value Resource Recovery： Transforms sodium sulfate waste into reusable chemicals. Cost Reduction： Reduces reliance on externally purchased acid and alkali. Environmental Impact： Lowers solid waste accumulation and wastewater discharge. Industrial Replicability： Provides a scalable model for salt waste utilization in the textile and chemical sectors. Why Use BPED for Sodium Sulfate Recovery? Applications Conclusion This BPED project demonstrates a practical and scalable approach to turn sodium sulfate waste into valuable resources, supporting both economic efficiency and environmental performance in modern industry. Contact us to explore customized BPED solutions for your plant.