In 2020, Cognition teamed up with Climate Care to offset our total annual emissions and becoming Carbon Neutral for the first time. In the same year, the company committed to stay proactive, adopting and developing more sustainable remediation methodologies, selection of materials and energy sources we use, reducing the need for offset element of our emissions. Our long-term goal is to continue improving efficiency and minimise emissions from our routine site and office operations across the board.
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Innovative free product extraction technique to replace conventional pump and treatwill help deliver a new lease of life for the former industrial site in Enfield

12 October 2016

Cognition is offering an innovative solution for the remediation of free phase oil contamination of groundwater. Already achieving great success in dealing with contaminated sites across much the USA, Cognition is bringing the system to the UK market.

Cognition is offering an innovative solution for the remediation of free phase oil contamination of groundwater. Already achieving great success in dealing with contaminated sites across much the USA, Cognition is bringing the system to the UK market.

In the past few decades, numerous remediation projects have been undertaken remediating groundwater oil contamination, often with limited success. Traditional remedial techniques are often costly and inefficient in recovering free product.

Based on extensive experience addressing petroleum and chemical spills, we can deploy a simple but practical solution to recover both light and dense non aqueous phase contaminants (LNAPL and DNAPL), also known as free-phase product. The NAPL Fabric Extraction Technique - Fabex, utilises an oleophilic/hydrophobic fabric capable of adsorbing the product with a 99% recovery-efficiency.

The fabric is conveyed in a continuous loop into the well to intercept the oil-water interface. As the fabric travels through the interface, product is adsorbed. The adsorbed product is removed in a specially designed desorption unit and the recovered oil collected in a storage drum or tank for disposal or recycling. The system can also be used to conduct recovery/recharge tests to identify the true product recharge potential, and make alterations to further increase removal efficiency.

The advantages of Fabex over conventional groundwater pump and treat systems

Eliminates the need to treat/process large volumes of groundwater;

Minimises or eliminates disposal costs;

No requirements for groundwater permits;

Recovery is not influenced by fluctuating water table;

Light/dense Non Aqueous Phase Liquids (NAPL) recovery at highly impressive speeds;

System can be deployed in wells of varying diameters (as small as 50mm) and in boreholes at depths of up to 60m;

Recovery efficiency with 99% product-water ratio;

Reduces O & M costs by nearly 70%;

Optional remote operation;

Low power usage and can be combined with solar and wind power units;

The Fabex unit occupies a very small footprint and can be deployed in below ground sumps and therefore ideal for deploying on operational sites

NET1.jpg Basic field trial of the NAPL Fabric Extraction system NET2.jpg Oleophilic fabric loop 'returning' from well with adsorbed oil Schematic showing operation of the system
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