Sarasota County Landfill, Florida
TENAX GNT geonet for leachate collection
and removal System
The leachate collection and removal systems (LCRS)
is commonly the only lateral drainage system provided in a MSW landfill
and serves as the primary means for leachate collection and removal.
The LCRS systems are installed on top of the primary liner and therefore
within the landfill core.
The leachate collection system must be
capable of providing adequate flow capacity for the life of the
landfill. Traditionally, natural materials, mainly gravel, have
been used, but these materials take up a great deal of valuable
airspace and need a heavy cushion layer to protect the underlying
liner, in addition it can be very costly if quality gravel is not
readily available and needs to be transported long distances.
TENAX TENDRAIN and TENAX GNT are high flow triplanar drainage geocomposites
and geonets specifically engineered for leachate collection and
removal system (LCRS).
TENAX TENDRAIN and TENAX GNT have three structural
ribs, the top and bottom ribs keep the filter geotextile layer out
of the central flow channel while the center structural ribs provide
separation and create flow channels. Moreover, the significantly
larger central ribs run parallel to the flow direction, resulting
in tremendous hydraulic performance, especially for long term flow
requirements under heavy compressive loads.
TENAX TENDRAIN assures
a leachate collection and removal system which can withstand heavy
compressive loads as well as maintain the flow capacity necessary
to limit the head within the drainage layer.
In fact conventional
geocomposites may experience a reduction in its drainage capacity
due to compressive creep, caused by sustained normal load, and biological
and chemical clogging caused by the leachate.
fall short of this goal due to lack of resistance to high compressive
forces and excessive geotextile intrusion.
In addition, bi-planar
geonets direct leachate flow at an angle, which requires the leachate
to weave back and forth in order to follow the flow direction. This
dissipates flow energy and may enhance clogging.
TENAX HD High Drainage geocomposites