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Leachate Treatment


Introduction to Organic Nanofiltration Membrane Technology


Nanofiltration is a membrane separation technology that falls between ultrafiltration and reverse osmosis. Nanofiltration membranes have pore sizes ranging from 0.5 to 2 nm, and their separation mechanisms primarily involve size exclusion and the Donnan effect, enabling the selective removal of inorganic salts, amino acids, and small‑molecule organic compounds. Compared with ultrafiltration—whose molecular weight cut‑off accuracy is limited—and reverse osmosis—characterized by high energy consumption—nanofiltration effectively addresses the shortcomings of both. However, it remains in the research and development phase, with challenges in customized design and large‑scale production. In practical industrial and everyday applications, numerous contamination issues persist, while national standards continue to tighten. Owing to its superior separation performance and high degree of tunability, nanofiltration has gained widespread recognition.

 

 

Process Flow Diagram


 

 

Process Advantages


1) Nanofiltration can replace reverse osmosis; while ensuring that water quality meets standards, it reduces operating pressure and energy consumption, while also increasing treatment capacity.

2) High COD and ammonia-nitrogen removal rates, with excellent long-term stability.

3) Low cleaning frequency.

 

 

Project Showcase


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Leachate Treatment Project at a Landfill in Huainan

Treatment capacity: 600 tons per day; high removal rates for COD, ammonia nitrogen, and color; excellent long-term stability.