The decomposition of waste in landfills is an important task for preserving the environment. In a land fill, water percolates through the waste and promotes the growth of bacteria and fungi. These organisms consume oxygen and produce by-products such as nitrogen and sulfide, which form a major component of landfill gas. The wastewater generated by a landfill has high COD and organic content, and the by-products of decomposition are toxic and dangerous to human health.
There are many types of landfill leachate, with different quality levels at different times. In most cases, the leachate is young and can be discharged directly to surface water without further treatment. However, in some instances, leachate may be too old to be released into surface water. This situation is often avoided by pre-treating the liquid on site. This allows for discharge standards to be met. Once treated, leachate can be pumped into a wastewater treatment plant or directly into surface water.
There are different methods of landfill leachate treatment. Some processes use an aerobic activated sludge process to reduce COD and ammonium content in landfill leachate. A biological sludge process is another option for reducing the risk of environmental pollution. These methods also eliminate biological organisms that may be present in the leachate. They are an excellent option for municipal and industrial waste treatment. The best way to get rid of the waste in a landfill is to treat it properly.