ABSTRACT
Wastes can be grouped into solid and liquid forms. The majority of solid waste is urban refuse. This refuse will decompose with time and generate gases and liquid waste, generally referred as leachate. According to the U.S. EPA [1] about 90% of wastes (which includes industrial hazardous wastes) are in liquid form. Therefore, control of solid and liquid wastes requires special emphasis on the control of liquid wastes.
