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| Rellenos |
El uso de los geocompuestos TENAX, siempre adaptables y acordes
con las diversas normatividades, ofrecen importantes ventajas
técnicas en términos de simplicidad de construcción,
adquisición de materiales, estabilidad de taludes y control
de erosión. Las ventajas económicas son sustanciales
cuando se compara las adquisiciones y los costos de instalación
de un sistema de drenaje contra la gama de georedes y geocompuestos
de TENAX. Los geosintéticos de TENAX permiten grandes ahorros
con el incremento de la capacidad disponible para depósitos
de desperdicios debido a su poco espesor y al hecho de que permiten
construir taludes mucho más inclinados que aquellos que
se hacen con arena. En promedio, usando geosintéticos en
lugar de materiales tradicionales, se pueden obtener ahorros del
50%.
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Calcinato, BS (Italia) |
Los geocompuesto y las Georedes TENAX son muy usados en las siguientes aplicaciones:
Sellado del Relleno para:
- Captación de agua superficial y sistema de evacuación (SWCRS)
- Ventilación de gas en rellenos (LFG)
En el fondo del relleno para:
- Colección de lixiviados y sistemas de extracción. (LCRS)
- Sistema de detección de fugas (LDS)
SCHEMATIC
EXAMPLE OF LANDFILL APPLICATION
Each day, million tons of municipal and hazardous wastes are disposed
of in landfills or other land disposal sites. A landfill is a large
area of land or an excavated site that is specifically designed
and built to receive wastes. A typical modern landfill is lined
with a layer of compacted clay and synthetic geomembrane to prevent
the waste and leachate from leaking into the ground or ground water.
Geocomposite drains and aggregate material are used at the sides
and bottom of the landfill to collect the leachate that flows through
the decomposing waste. The leachate is then collected sent to a
leachate recovery facility to be treated.
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Municipal Solid Waste System
Minimum liner system
Conventional design |
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Municipal Solid Waste System
Minimum liner system
Geosynthetics design solution |
While landfills
that accept municipal solid waste have typically a layer of clay
and synthetic liners and a leachate system to prevent leakage, for
hazardous waste landfills extra precautions must be taken. For example,
a hazardous waste landfill must have two impermeable liners layers,
one consisting of a geomembrane (Primary liner), and the other composed
of both a geomembrane and a thick layer of compacted clay material
(Composite Secondary liner). In addition, a landfill accepting hazardous
waste must have two leachate detection systems: the upper layer
for Leachate Detection and Removal System (LCRS) and lower layer
for Leak Detection and removal System (LDS). Leaks of leachate from
the primary waterproofing liner can occur fundamentally for two
reasons: defects in seams of the geomembrane or damages to the liner
during placement and compaction of waste materials. |
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Hazardous waste landfill
Minimum liner system
Conventional design |
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Hazardous waste landfill
Minimum liner system
Geosynthetics design solution |
When a landfill
reaches capacity, it is usually capped to ensure that rainfall will
not infiltrate the surface. The leaching of the rainwater through
the landfill could cause contamination of the groundwater, and nearby
surface waters. Thus covers are always required on completed landfills.
A composite cover, in which use has been made of soils and synthetic
materials, can effectively eliminate infiltration but must be carefully
designed to take care of considerations such as slope stability,
long-term degradation and erosion. In addition significant amounts
of gas can be produced from decomposition of waste and an appropriate
Landfill Gas Venting system (LFG) shall be designed.
Methane extraction
system wells are used to collect landfill gas. The gas may be used
to generate electricity on site, burned at flare locations on the
landfill, or used in the sludge combustion process. Once a landfill
is capped (closed), the site shall be monitored for gas and leachate
for a minimum of 30 years after the closing date. After a landfill
is capped, the land may be used for recreation sites such as parks,
golf courses. |
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Typical landfill cover system
Conventional design |
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Typical landfill cover system
Geosynthetics design solution |
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