Patent ID: 7309189
Filing Date: 2007-12-18
Classification: B09B,B09C

Abstract:
1. A method of collecting and recirculating waste treatment liquid in a portion of solid waste in a landfill which comprises the steps of: (a) providing a fluid injection system comprising a layer constructed of a permeable material having hydraulic conductivity and having a first surface and an opposed second surface, a perforated pipe adjacent the layer and a waste treatment liquid collection system spaced apart from the fluid injection system, wherein the layer is positioned on the portion of the solid waste so that the second surface of the layer is adjacent to and above the portion of solid waste and the waste treatment liquid collection system is positioned at a bottom of the portion of solid waste in the landfill; (b) injecting a waste treatment liquid into the perforated pipe under positive pressure so that the waste treatment liquid moves into and travels through the layer and is distributed into the portion of solid waste adjacent the second surface of the layer and wherein the waste treatment liquid moves down through the portion of the solid waste toward the waste treatment liquid collection system due to gravity, wherein the layer is constructed of a reactive material and wherein as the waste treatment liquid moves through the layer, the reactive material of the layer acts to reduce a concentration of contaminants in the waste treatment liquid; and (c) collecting the waste treatment liquid using the waste treatment liquid collection system after the waste treatment liquid passes through the solid waste.