Pollux Consulting

When the client speaks, we listen

Leachate management

Leachate is an important factor in landfill management:

  • It is a potential source of landfill liability through leaching to the subsoil and discharge to surface water
  • It is an important tool in conceiving the flushing bioreactor for organic waste

Leachate management implies leachate quantification, extraction, characterisation and treatment

A/   Bespoke software allows estimating the production of leachate in relation to  landfill design and specific weather conditions 

The software output is leachate production in view of specific rainfall.

B/   Based on leachate quantities, leachate evacuation systems can be designed, either through horizontal drains, vertical shafts or a combination of both 

Horizontal drain design is based on computer calculations taking into account:

  • Slope of the confinement layer
  • Thickness and porosity of the drainage material
  • Diameter of the drainage pipe
  • Leachate level in the drainage pipe

C/   Pollux Consulting has extensive experience in leachate characterisation and risk assessment concerning discharge in surface waters..Discharge risks can be identified at different levels:

  • Direct toxicity effects through the presence of BOD, COD and ammonium
  • Indirect ecotoxicity  effects characterised by :
  1. Metal chelating activity
  2. Genotoxicity
  3. Methane oxidation toxicity
  4. Nitrifier toxicity

D/   Bespoke design and operation of leachate treatment systems is the final step in active leachate management. This is based on:

  • Leachate characterisation
  • Quality of the receiving surface water
  • Reigning legislation
  • Overall aspects of good management

Figure shows a iological leachate treatment through a membrane bioreactor including effluent polishing with activated carbon