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  • Controlled landfills and the importance of isolating them

Controlled landfills and the importance of isolating them

Controlled landfills and the importance of isolating them

by Tema Corporation / Wednesday, 13 April 2022 / Published in GEO, Geogrids, Landfills, Landfills - Drainage, Landfills - Erosion control, Landfills - Reinforcement, Landfills - Waterproofing
TeMa Geo Solutions - Landfills

Landfills for inert, non-hazardous and hazardous waste are governed by specific laws in each country, which set out precise regulations on the construction and maintenance of these sites.

As they are virtually in the ground and designed for certain types of waste, they must meet environmental and safety standards.

Let’s take a look at everything in detail.

 

The risks of not isolating them

Assuming that proper disposal is essential, many types of waste can take years, even decades, to disintegrate and complete natural decomposition processes. At this stage, they produce a large amount of slurry, such as leachate, which is extremely contaminating for the soil and for groundwater.

Moreover, biogases are also produced, mainly methane and carbon dioxide, due to the breakdown of organic material, which must be controlled and could be used to produce renewable energy.

 

How to isolate them

Controlled landfills need to be isolated from the ground that hosts them, but to be safe they need to fulfil different functions.

 

Surface erosion control

Vegetation naturally protects the ground from erosion by weather conditions such as wind and rain, which would cause subsidence. While waiting for grassing to protect the sides and surface of the landfill, anti-erosion geomats, in a biodegradable and synthetic version, can be chosen according to needs.

TeMa Geo Solutions offers a wide range to choose from, which can be browsed here.

 

Reinforcement

A landfill site is sometimes designed and built on more or less steep slopes. If a slope is steep and the ground is unable to support itself, retaining grids need to be installed in order to prevent slippage, which would expose and damage lower layers. View all our solutions.

 

Drainage

Specific products, drainage geocomposites, can be used for the drainage of rainwater and leachate, which inevitably builds up and must be kept away from the ground.

 

Barrier

Bentonite-based products, such as Barrier Bento, allow the area to be waterproofed, including walls with high slopes and the bottom.

 

Capping

Landfills also have a final cover that must meet precise criteria. These include isolating waste from the ground and surface erosion control. However, minimising water seepage and blending into the landscape are equally important.

 

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Tagged under: Drainage, Erosion control, Landfills, reinforced geogrids, TeMa Geo Solutions, waterproofing

What you can read next

GEO - Controlling surface erosion with biomats and geomats
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