EFFECT OF MUNICIPAL SOLID WASTE COMPOSITION ON PERMEABILITY

摘要

Rapid growth in major cities of the world would make a piece of land cost a fortune to be developed. It might undeniably important to fully utilize every available soil in a city. This includes development of reclamation landfill site for maybe housing or commercial project. However the main concerned is that landfill areas are suffering degradation of environment quality as well as unpredictable consolidation settlement if one tries to reclaim these areas. With the development of improving in landfill leachate quality management by using semi-aerobic landfill concept or well known as Fukuoka landfill method which has been developed more than 20 years ago, next step, it is essential to predict whether this type of landfill method can improve in consolidation settlement during reclamation works. One approach to understand consolidation of a municipal solid waste is from the element of hydraulic coefficient of the waste itself. A falling head test was conducted on 3 days old domestic municipal solid waste taken from compactor unit garbage truck. From the test it is found those wastes that have a higher void ratio, would have a higher permeability as well. However, the higher content of organic waste would reduce the hydraulic conductivity in municipal solid waste. By understanding the characteristic that affect the hydraulic coefficient of a domestic municipal solid waste, consolidation settlement rate of landfill site can be predicted more accurately. Hence landfill site reclaim can be achieved in lesser time by using proper ground improvement method.