Brown Field Reclamation through water filtration [read more]

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Brown Field Reclamation through water filtration

In the UK, brown field sites are defined as being "previously developed land" that has the potential for being redeveloped. It is often (but not always) land that has been used for industrial and commercial purposes and is now derelict and possibly contaminated.

There are various reasons that owners of brown field sites have for the reclamation the land. Owners of such sites include manufacturing plants, petrochemicals and utilities and these businesses may require reclamation based on decisions made about the future use of the land. Such decisions may depend on whether to better the land in its current state in order to keep it operational or whether it will be sold off for public or private development, such as housing.

Land reclamation for sites that have previously been used for industrial processes may, on investigation, identify contamination of soils and groundwater, the processing of which may also involve dealing with difficult natural background chemistry such as, for example iron. Iron may be oxidised during the process, thus complicating the treatment process, particularly where petroleum hydrocarbons are also present.

Remediation of such sites may require the extraction of contaminated groundwater using submersible pumps and the treatment and disposal of these segregated wastes. This may necessitate the bespoke design and engineering of a treatment plant capable of handling the contaminants and local groundwater chemistry.

Environmental Engineering company Cornelsen is highly skilled in designing effective treatment solutions. As a specialist in soil and groundwater remediation, the supply, installation and commissioning of water treatment plants constitutes a significant proportion of Cornelsen's business.

This work is often associated with the treatment of waters abstracted from open excavations, sumps or boreholes associated with de-watering during large land reclamation projects.

In its desire for effective water particulate separation to handle effective filtration of the oxidized iron, Cornelsen has been working with water filtration specialist, Industrial Purification Systems (IPS). The company has found that the ancillary use of IPS's high efficiency water filtration technology as part of their treatment process has reduced operational costs and been highly efficient.

Quentin Hulm, managing director of Cornelsen says: "Our treatment plants are more often than not designed to run 24/7 for the continual remediation of land. Previous water filtration methods can lead to the requirement for continuous or very frequent site presence to service plant works and keep them operational.

"Through applying high efficiency water filtration as a bolt on to the overall operation of our plant, the backwash process becomes very efficient and reliable. With the volume of water needed for a successful backwash being less and because it is automatic, operative site visits are now down to every two weeks."

The company has found that costs have been significantly reduced whilst increasing the operation of the plant which ultimately becomes of benefit to its clients.

The water filtration technology used is called the CrossFlowMF1.0 sand filter. This has been developed by IPS to filter below 1.0 micron - reliably - even achieving down to 0.45 micron to ensure cleaner process water which in turn can reduce a businesses carbon footprint. The reuse of process water just once can reduce the carbon footprint on potable water by a staggering 50%.

Operationally, the CrossFlowMF1.0 sand filter system utilises a unique patented vortex bed stabiliser which maintains flat bed filtration with high surface turbulence. This new technology has been shown to provide a high efficiency removal rate of over 86% at 1.0 micron in one single pass whereas conventional filters have to undertake multiple passes to get anywhere such efficiency.

Cornelson is our specialist representative for Land Reclamation. Click here for more technical information.

 

 

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