Reaction occurring in the landfill
Biological decay of organic materials (aerobical or anaerobic)
Chemical oxidation of waste materials
Escape of gases from the fill
Movement of liquids caused by differential heads
Dissolution and leaching of organic and inorganic materials by water and leachate moving through the fill;
Movement of dissolved material by concentration gradients and osmosis
Uneven settlement caused by consolidation of material into voids
Leachate management
How it's entered
Surface drainage
Rainfall
Groundwater
Water from underground springs
Recycling
- An effective method for the treatment of leachate is to collect and recirculate the leachate through landfill
- During early stages of landfill operation, the leachate will contain significant amounts of TDS, BOD, COD, nutrients and heavy metals
On-site treatment
- Aerobic treatment (aerated lagoon)
- Polishing treatment (reed bed)
- Wetland system
- Spray irrigation (evaporation)
Active algal photosynthesis
Use wetland plants to treat leachate(e.g: cat tail)
Mohamad Saifullah Bin Abd Hamid 2017632158 EH2208B