GEOSYNTHETICS

Landfill Capping & Gas Dispersion.

I. Waste Management Applications

1) Landfill Capping
To guarantee an effective cover the landfill cap should incorporate a drainage layer above and a gas collection layer below the cap lining system. Finesse Pozidrain will provide these functions with higher performance and lower cost than conventional crushed stone filters. Pozidrain has been specially designed to be compatible with both HDPE and clay liners and to give the optimum performance over the whole life of the landfill capping. Pozidrain will enhance the performance of the GCL or HDPE liners by providing an additional barrier that prevents the majority of the water or gas reaching the liner. Pozidrain geocomposite drainage layer has a proven record in landfill capping.

Landfill Cap Drainage
Pozidrain installed over a geomembrane, within the geosynthetic landfill cap, will collect and drain rain water from the soil cover. This will prevent saturation and ensure the capping soil remains stable.

Gas Collection & Dispersion
Pozidrain below the landfill cap geomembrane will form the basis of a very efficient gas collection and dispersal system. Installed with the flat face of the core against the liner and dimpled face against. Pozidrain will also provide a high level of protection to the lining system.

Geomembrane Protection
Pozidrain has a smooth flat core that has the optimum design to reduce the contact stress on the geomembrane. The high CBR puncture resistance of Pozidrain cushions the geomembrane from sharp material in the landfill waste.

2) Landfill Base Lining
The wide width Pozidrain Protector geocomposite drainage range has major advantages over conventional drainage stone. It creates more landfill volume and has hydraulic properties designed for reliable and sustainable performance. For basal applications high strength cores are used. The protection efficiency of the material is more than sufficient to endure installation and long term loading. Pozidrain reduces the hydraulic head and stress on the geomembrane (as demonstrated by the cylinder test) and provides protection against puncture. A significant number of landfill sites have already utilised the benefits of Pozidrain.

Leakage Detection
Leakdrain installed between a primary and secondary geomembrane forms the basis of an efficient detection system. Leakdrain will not only identify the presence of a leak but also has sufficient capacity to collect the discharge and guide it safely to a collection point until repairs can made.

Leachate Drainage
Pozidrain Protector range is specifically designed for landfill base applications to collect and drain leachate and provide geomembrane protection. The large voids within the Pozidrain core provide high resistance to biological clogging. Pozistrip range with high flow performance drainage strips and UV resistant geotextile is used for the side slope drainage and liner protection.

Ground Water Drainage
Pozidrain below the landfill base geomembrane will act as a ground water drainage system. Installed with the dimpled drainage face against the subformation and the flat face on which to lay the geomembrane liner uppermost, Pozidrain will provide a high level of protection to the lining system.

II. Environmental Protection