Landfill leachate is one of the most challenging wastewater streams to treat due to its variable composition, high pollutant concentration, and potential toxicity.

Leachate Characteristics

Fresh leachate has high BOD, COD, ammonia, and metals. Old leachate has lower BOD but persistent organic compounds and high ammonia.

Treatment Challenges

• High ammonia nitrogen (500-2,000 mg/L)
• Variable pH
• Toxic compounds
• Biodegradability varies with age
• Heavy metals possible

Treatment Technologies

Physical-Chemical Pretreatment

Stripping for ammonia, coagulation-flocculation, and advanced oxidation for refractory organics.

Biological Treatment

Sequencing batch reactors or membrane bioreactors for organic and ammonia removal.

Membrane Treatment

Nanofiltration and reverse osmosis for final polishing and water reuse.

Landfill Leachate Recirculation

Return to landfill to enhance biodegradation and biogas production.

Case Study Approach

Each landfill has unique characteristics requiring customized treatment trains. Pilot testing is recommended.

Feiran EP Leachate Solutions

Contact us for specialized leachate treatment system design.

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