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  • Archive from category "Landfills – Erosion control"

Category: Landfills – Erosion control

Safety first: and that applies to landfills, too

Monday, 13 November 2023 by Tema Corporation
Safety first: and that applies to landfills, too

TeMa Geo Solutions’ thirty years of experience extends to the field of controlled landfills and contaminated sites, with products specially designed for each function to ensure the site is safe, and with investment-conscious solutions, as well as a focus on ensuring peak performance.

 

Safe landfills legislation

In Italy, regulation around the controlled disposal of waste dates back as far as 1982, later supplemented by the European directive and updated in 2020 by Italian legislation (D.Lgs no.121).

This legislation covers all aspects of the disposal cycle, from landfill classification to the type of waste, as well as criteria for the construction and operation of the facilities, with a strong environmental focus. In this regard, TeMa has come up with built-up systems and materials that fulfil the required functions and comply with the relevant legislation.

 

The main functions to make safe a controlled landfill

Making safe a landfill facility entails fulfilling a number of functions:

 

Barrier for landfill Barrier

Walls and floor must be isolated to protect groundwater and soil from leachate and biogases resulting from decomposition processes. To ensure sufficient watertightness, legislation requires the use of at least 0.5 m of clay or, drawing on the principle of hydraulic equivalence, synthetic products: sodium bentonite composites like Barrier Bento — which contains up to 5 kg of bentonite/sqm sandwiched between two geotextiles — provide an impermeable layer, acting as a barrier between soil and waste.

 

Reinforcement for safe landfills Reinforcement

One of the major issues to be addressed when designing landfills, especially the capping system, is stability, which can be achieved by leveraging the compressive strength of the soil combined with the tensile strength of geosynthetics. Reinforcement solutions provided by TeMa range from PET-series geogrids to geomats laminated with geogrids.

 

Drainage for landfill Drainage

For liquid and gas capture, legislation calls for the use of 50 cm of aggregate, which nonetheless can come with its own stability issues, especially on steeper slopes. With the use of drainage geocomposites, the relevant built-up system can be pared back, while the number of vehicles required to carry materials can also be reduced. TeMa’s offering ranges from studded and micro-studded membranes to monofilaments laminated with nonwovens, and geonets with one or two nonwoven layers.

 

Erosion control for safe landfills Erosion control

The top layer of the soil is eroded by the action of the elements — especially by the type of unpredictable and extremely violent weather events we’ve witnessed in recent years — triggering alarming landslips, which can undermine a site’s hydrogeology. To prevent issues of this kind, it’s essential to encourage vegetation (which serves as a form of natural erosion control) and protect the soil while it takes root by using natural or synthetic mats from TeMa.

 

Contact us!

DrainageErosion controlreinforced geogridsstudded membranesTeMa Geo Solutions
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  • Published in Drainage geocomposites and membranes, Erosion mats, GEO, Geogrids, Landfills, Landfills - Drainage, Landfills - Erosion control, Landfills - Reinforcement, Landfills - Waterproofing
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Controlled landfills and the importance of isolating them

Wednesday, 13 April 2022 by Tema Corporation
TeMa Geo Solutions - discariche controllate e come isolarle

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.

 

DrainageErosion controlLandfillsreinforced geogridsTeMa Geo Solutionswaterproofing
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  • Published in GEO, Geogrids, Landfills, Landfills - Drainage, Landfills - Erosion control, Landfills - Reinforcement, Landfills - Waterproofing
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Protecting the vineyard landscape: tried-and-tested technologies… sitting lightly in the field.

Thursday, 14 October 2021 by Tema Corporation
TeMa Geo Solutions - Protecting the vineyard landscape

The photo conjures up a lofty tale: “Autumn arrives and with it, the first rains, days draw in, the temperature starts to drop and, above all… it’s harvest time!”

We’re in the eastern corner of the Veneto region, the Prosecco hills have outdone themselves once again this year and a steady stream of grape-laden trailers continue to roll past on their way to the wineries. But this year’s harvest has had to contend with rather uncertain weather patterns: frosts in late spring, persistent rain interspersed with dry spells, with violent storms and hail over summer.

These conditions certainly don’t help the soil, putting it at risk of slips, subsidence and erosion. But if we apply TeMa Geo Solutions’ modern technologies and materials designed for this very purpose, we can protect the land from damage and, what’s more, do it in a sustainable way.

Not far from here, just a few kilometres from our headquarters, the Prosecco hills fall largely within the UNESCO World Heritage Site, meaning any measures must be strictly reconstructive, designed to protect the status quo and absolutely non-invasive: “gentle” on the environment.

TeMa Geo Solutions has come up with high-performance solutions to control the natural erosion of the soil, reinforce slopes, and drain water with:

  • biodegradable fibre matting made from 100% natural jute such as Ecovernet® J500 XL and Ecovermat P Grass, which provide protection to stop soil being blown or washed away by the elements, and encourage vegetation;
  • the K-Mat F erosion control synthetic geomat;
  • reinforcement geogrids such as X-Grid PET PVC, which can withstand considerable stress levels;
  • the Speedrain drainage geocomposite, which drains away water from the surrounding soil, stabilizing any surface slips.

Products

Ecovernet biomats made by juta fibersEcovernet J
Biomats used for the superficial erosion control made by straw fibersEcovermat
Synthetic anti-erosion geomatK-mat
Reinforcement uniaxial geogrids: PET and coated with PVCX-Grid PET PCV
Drainage geocomposite: core of monofilaments, bonded to 2 filtering nonwoven geotextilesSpeedrain

If you wish to receive more information, CONTACT US or take a look and download our “Vineyards” catalogue.

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  • Published in environmental, Erosion mats, GEO, Geogrids, Landfills - Erosion control, Reinforced earth structures - Erosion control
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