Showing papers on "Bioreactor landfill published in 1984"

Recirculation of leachate as a landfill management option: benefits and operational problems

Abstract: Summary Recirculation of leachate through landfilled solid wastes offers potential advantages in reducing the volume of liquid by surface evaporation, and reducing the strength of leachate by crude anaerobic treatment within the landfill. Increasing the moisture content of the fill is also reported to give rise to a more rapid stabilization of solid wastes, and to enhance gas (methane) production. Results of research using 7 m 3 lysimeters essentially confirmed these benefits and produced a predicted volume of low strength leachate within 18 months. A full-scale study at a lined landfill at Seamer Carr, North Yorkshire, has shown that on a large scale these benefits are more difficult to obtain, although this three-year study has proved successful in considerably reducing the volume and organic strength of leachate. It is concluded that recirculation by itself cannot provide a lasting solution for leachate management, although significant reductions in the volume and strength of leachate can be obtained. Careful control is required and, in particular, it is necessary to consider the hydrology of a landfill and how this is affected by use of (final and intermediate) cover material.

Combined treatment of landfill leachate and domestic sewage

Abstract: Landfill has been a widely used option to disposal of waste. However, it faces a major difficulty with regard to treatment of the leachate originating from the decomposition of organic matter present in the landfill. In order to minimize the impacts caused by leachate from landfills have an alternative treatment by anaerobic process, which combined with sewage may be a viable solution to reduce the damage caused by these two effluent. The anaerobic digestion has been applied for the treatment of solid waste in both developed and developing countries. There has been the increasing use of anaerobic technology, specifically through upflow reactors and sludge blanket. The use of this technology becomes even more attractive in Brazil, due to weather conditions, as this process is best suited to tropical and subtropical countries, with the main advantage the generation of biogas that can be used as renewable energy