Lubna landfill
Lubna landfill
Lubna landfill
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FIG. 21 Mineral filter layers used for peripheral and “finger” pipe drainages the <strong>Lubna</strong> <strong>landfill</strong>The terrain surrounding the <strong>landfill</strong> has a low gradient. Therefore a number of control sinks (every25-50 m) along the peripheral drain along with two pumping stations have been designed toprotect the drainage system against silting up. The collected leachate flows to the water cleaningplant in the south-eastern corner of the <strong>landfill</strong> and finally to the surface streams.Additional drainage was designed on the slopes and along technological roads. The open waterreservoirs were designed for the rain water flow from the <strong>landfill</strong> slopes (Fig. 4).8.3 Mineral capping systemTaking into account the high slope inclination, the constructed degassing system and introductionof plants on the <strong>landfill</strong> surface, the former planned capping system with a geomembrane wasreplaced with clay mineral and compost layers. The capping system of the <strong>landfill</strong> surface wasconstructed successively with the increase, of the <strong>landfill</strong> height.The compacted clay sub-layers of the mineral capping have the thickness of 03 m. The minimaldegree of compaction was I s = 0.92. A few clay layers were created to protect embankment forwaste layer disposal (Fig. 22). The scheme of the mineral capping system on the <strong>landfill</strong> slopes ispresented in Fig. 23.18