| 摘要 |
<p>A landfill (24) has an impermeable liner (26) at its base and sides, and is capped at (28) by a multi-layer cap. The body of waste material (46) within the landfill (24) will undergo degradation. One byproduct will be leachate. Sediment (37) will develop at the bottom of the landfill (24) in the absence of any intervention. Extraction wells (38) extend from the surface (above the cap 28) down to the bottom of the landfill (24). A pump (54) allows leachate to be drawn from the waste material (46), through the extraction well (38). Leachate is extracted at a rate sufficient to create turbulence within the body of waste material (46). The turbulence serves to entrain sediment in the leachate for extraction of the entrained sediment with the leachate.</p> |
