How to Treat Landfill Leachate
While the most effective way to reduce landfill leachate â€” any liquid that enters the facility and passes through waste material on contact â€” is to keep it out of the facility with a close-as-you-go approach, Agru America offers a number of treatment options in a blog post.
The company says an impermeable closure system using Agru Americaâ€™s geomembrane products that include an Integrated Drainage System (IDS) meet all requirements for closure.
Agru America says other leachate treatment options include:
- Diversion: keeping harmful materials from ever entering the landfill.
- Pretreatment: surface ponds, biological reactors, physical/chemical plants, constructed wetlands and reverse osmosis.
- Land application: grasses and trees can absorb certain contaminants.
- Recirculation: sent back into the landfill, the water helps speed the breakdown of organic materials.
- Evaporation: leachate is sprayed onto the working face, the surface of a storage pond or mechanically evaporated on-site.
- Wetlands: natural processes speed treatment in lined, constructed wetlands.
- Hauling: a costly last resort.
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