Product category:
Valve positioners and actuators
News Release from: Burkert Fluid Control Systems | Subject: Airline
Edited by the Processingtalk Editorial
Team on 29 June 2005
Contaminated land remediation and
pumping system
Thanks to a unique control system built and installed by Burkert, the once-polluted land of a brownfield site in the heart of the Midlands is now the location of a brand new Tesco superstore.
Thanks to a unique control system built and installed by Burkert Fluid Control Systems, the once-polluted land of a brownfield site in the heart of the Midlands is now the location of a brand new Tesco superstore Formerly a bus depot with underground diesel storage tanks, the site had been left contaminated after years of use and frequent leakage from the tanks
This article was originally published on Processingtalk on 24 May 2007 at 8.00am (UK)
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Undeterred, Tesco saw the potential and brought in QDS Environmental, a specialist in contaminated land investigation and remediation.
The clean-up operation involved the removal of diesel and included the installation of a complex network of 24 underground recovery wells across the site prior to building work beginning.
The diesel, which naturally floats on the surface of the water, is drawn up through the wells, attracting with it a quantity of the underlying water.
The process is called Dual Phase Vacuum Extraction, as gas and liquid phase contamination is removed.
The extracted air is diverted to a vent, the treated groundwater drawn into a sewer and the extracted diesel is stored before being removed for recycling.
The control aspect of this complex system, that boasts potential for regenerating hundreds of contaminated sites across the country, is self-contained in a panel inside the control unit.
The key to the control system is the recently launched Burkert Airline: - a revolutionary valve island system that integrates high performance I/O modules with fieldbus communications, pneumatic valve actuation and a control platform.
In this case, Burkert integrated all of the float and level switches used in the system plus the pneumatic controls for each of the 24 vacuum lines and actuated valves used to control the fluid levels in air and liquid separation tanks.
Burkert then incorporated the PLC itself - making the whole system fully integrated and programmable.
All the controls were installed in one panel that is easily programmable by the operator when on site.
An autodialler in the control system alerts QDS to any problems.
The system has potential for Ethernet linking in the future - enabling remote monitoring. Request a free brochure from Burkert Fluid Control Systems ...
Project Manager for QDS, Nik Dixon, says: "The Airline system is certainly proving to be successful, and we are looking to use it in future systems which are typically used in the remediation of several sites over their anticipated lifetime, typically up to 10 years.".
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