Solutions and equipment for leachate treatment

Abstract

Without a proper waste management, leachate may contaminate the environmental; landfill gas can be toxic and lead to global warming and explosion and landfill wastewater can pollute the land and surrounding waters. The major factors, which affect the production of leachate and landfill gas are waste type, pH, moisture content, particle size and density, temperature, landfill type etc. Concentrations of various substances occurring in leachate are too high to be discharged to surface water or into a sewer system. These concentrations, therefore, have to be reduced by removal / treatment. Common toxic components in leachate are COD, BOD, ammonia, heavy metals etc. Process combinations for the treatment of landfill leachate have been thoroughly tried and tested over the past years by many researchers. A new solution and equipment were proposed by a team of researchers from DFR Systems SRL in order to treat the leachate. Several treatment stages were implemented in the wastewater treatment technological flux: physical treatment, biological treatment (with artificial mobile support), ultrafiltration, dissolved air flotation, UV disinfection etc. The new technology was tested on a lab-scale facility and the results were encouraging. In the present paper are presented the obtained results as well as the treatment technology and equipment.