Landfill Leachate Treatment

Home > Solution > Landfill Leachate Treatment

Reliable and efficient purification of complex leachate streams

Landfill leachate contains high concentrations of organic compounds, ammonia nitrogen, salts, and heavy metals, often mixed with surfactants and persistent organic pollutants.
Its composition varies significantly with rainfall, landfill age, and waste composition, making stable treatment a major technical challenge.

Deepflow provides integrated modular systems that combine biological treatment, advanced oxidation, membrane filtration (including DTRO), and vacuum evaporation to achieve reliable compliance and water reuse.
For large leachate volumes, our PFET polymer-film evaporators deliver outstanding energy efficiency and corrosion resistance.
When ammonia or salinity levels are extremely high, Aevya vacuum evaporators ensure reliable separation and distillate purity.

Sustainable and compliant process chain

Our treatment concept combines several advanced technologies in sequence:

· Biological pre-treatment for ammonia removal and COD reduction

· RaeX chemical-physical neutralization and precipitation for heavy metals and solids

· Seltra / DTRO membrane filtration (ultrafiltration + disc-tube reverse osmosis) for deep purification under high-fouling conditions

· Aevya / PFET evaporation for final concentration and zero-liquid discharge

· RedGan drying system for sludge reduction and stabilization

The system ensures up to 98% COD reduction and consistent compliance with discharge or reuse standards, while minimizing operating costs and energy consumption.

Typical applications

Municipal landfill leachate
Industrial waste disposal sites
Hazardous waste storage areas
Waste transfer station drainage
Composting and waste treatment runoff

Process flow

1. Equalization and buffering → homogenization of leachate load

2. Biological treatment → removal of ammonia and organic matter

3. RaeX chemical treatment → neutralization and heavy metal precipitation

4. Seltra / DTRO membrane filtration → high-pressure ultrafiltration and disc-tube reverse osmosis for deep purification

5. Aevya / PFET evaporation
• PFET for large leachate volumes and high chloride content
• Aevya for concentrated or high-salinity leachate

6. RedGan drying → dewatering and residue stabilization

7. Distillate reuse → irrigation, washing water, or process reuse

Your advantages at a glance

Stable removal of ammonia nitrogen, COD, salts, and heavy metals
Up to 98% purification efficiency
PFET for large-scale, corrosive leachate
Aevya for high-strength, variable loads
DTRO membrane technology for high-fouling and high-salinity leachate
Fully automated, low-maintenance operation
Compact modular design for easy integration and expansion

Recommended products

DEP – PFET polymer film evaporator
DES – Single-effect, steam/waste heat
DEH – Single-effect, heat pump
DE2S – Multi-effect, steam/waste heat
DE2H – Multi-effect, heat pump
DJY – Chemical dosing skid
DPFR – Pipe flocculation reactor skid
DTRO-Disc-Tube Reverse Osmosis (DTRO) systems
DUF-Ultrafiltration (UF) systems
DRO-Reverse Osmosis (RO) systems
DYS – Horizontal dryer with scraper, steam/hot water

Q&A

Q

Can RaeX automatically adjust chemical dosing based on real-time water changes?

A

Yes. Advanced RaeX systems use pH, conductivity, and turbidity sensors with PLC control to adjust reagent dosing dynamically.

Q

How is clarification efficiency evaluated?

A

It is assessed through turbidity, total suspended solids (TSS), floc quality, and retention time — by comparing inlet and outlet performance.
Q

How should flocculant or reagent solutions be stored to maintain stability?

A

They should be kept in sealed containers, at stable temperature, away from light, and at consistent concentration to prevent degradation.

Q

How often should deep chemical cleaning be performed compared to routine CIP?

A

When standard CIP cannot restore performance or solids removal efficiency, a stronger chemical regeneration should be carried out.
Q

How should polymers be mixed to optimize particle binding?

A

Begin with vigorous mixing to disperse the polymer, followed by gentle agitation to promote floc growth — the “bridging” principle.

Q

How does temperature influence floc formation?

A

Higher temperature accelerates reaction kinetics but may reduce floc stability and adsorption performance.