MODELING OF REHABILITATION OF UNREGULATED SOLID WASTE LANDFILLS

摘要

Unregulated solid waste landfills are causing severe environmental impacts for environment and human health due to the formation of leachates and landfill gas during decomposition of organic wastes. Common problems that usually be faced with these sites are visual pollution, air pollution, water pollution, soil contamination, spreading of waste, spreading of diseases, subsidence and odor. Therefore the rehabilitation of waste dumping sites has become a matter of importance for controlling these adverse effects. In this study, it is aimed to promote the rehabilitation of unregulated solid waste landfills and to provide guidance on how to effectively rehabilitate these sites so that off-site emissions from leachate and landfill gases are minimized. This study focuses on the geotechnical solutions to the problems associated with open waste dump sites. Full rehabilitation process includes shaping the waste body, surface water control, leachate management, gas management, final cover system with HDPE liner, settlement analysis, slope stability analysis and monitoring after closure. As a case study, data belongs to the unregulated solid waste landfill called Silivri are used. For the rehabilitation of the unregulated landfill, USEPA and Turkish Regulations are taken as major guidelines.