Rotork valves help keep sewage off beaches
July 25, 2013 - Rotork flow control equipment has been installed at a sewage treatment works serving Somerset’s largest tourist resort on the south west coast of England.
Wessex Water has invested £26 million at the site to achieve improved bathing water quality for the resort of Weston-super-Mare. The improvements will ensure that the site can cope with increased population and continues to comply with standards set by the Environment Agency. The work has been completed ahead of the revised Bathing Water Directive, which comes into force in 2015 and introduces more stringent water quality standards.
New process plant and equipment has been constructed to improve secondary treatment by the replacement of submerged biological contactors with an efficient and reliable four-channel activated sludge plant (ASP), combined with increased final settlement capacity. This enables newly installed Ultra-Violet disinfection plant to achieve better microbial reduction and meet strict consent levels in the final effluent. The upgraded site is designed to deliver a flow to full treatment (FFT) rate of 1050 litres/second.
Additional work on the site has involved the introduction of storm settlement tanks with a capacity of 21,000 m3 (tonnes) to assist the reduction of over-spills in combination with a separate programme to remove surface water flows into the area’s foul sewer network.
Rotork’s scope of supply for flow control in the project encompasses IQ multi-turn and IQT quarter-turn intelligent electric actuators and IB manual gearboxes for motorised and hand operated valves and penstocks throughout the new works. All electric actuators are Profibus-DP V1 network enabled and centrally controlled by a bespoke SCADA system designed by the Wessex Water Automation Team. The use of Profibus technology, a standard feature of Wessex Water’s automation programmes, delivers significant savings in cabling, terminations, PLC hardware and labour.
The SCADA system runs the automated processes and collects control, status and diagnostic data from each actuator. This information is available on the site and at Wessex Water’s regional operation centre at Bath, where remote diagnostics has proved to be a cost effective method of maintenance and service by identifying the right operational staff to be sent to site if required.
The upgrade project at Weston-super-Mare STW has been performed by a partnership made up of the Halcrow Group, Dean & Dyball Civil Engineering, Nomenca and Wessex Engineering & Construction Services. The Rotork equipment was supplied in accordance with the Framework Agreement which the company holds with Wessex Water.
MORE CASE STUDIES
Wibu-Systems' CodeMeter used by Fritz Stephan to secure medical devices
CodeMeter protects the company’s intellectual property against counterfeiting and reverse engineering, safeguards its EVE devices from tampering,...
Honeywell to provide process control for Chinese petrochemical company
Honeywell UOP will supply a range of technologies in the form of license, design, key equipment, and state-of-the-art catalysts and adsorbents,...
Greer Industries chooses Emerson's Powerdrive FX variable speed drive to enhance mining production
The product is being used as a regenerative drive on a downhill conveyor at one of the company’s limestone mining facilities. Leroy-Somer was...
ELNOR delivers automated coffee grinding for MAHLKÖNIG
To meet MAHLKÖNIG’s high-precision requirements, ELNOR ensures accurate production and assembly of its motor parts. Engineers from ELNOR perform...
Domus Logistics chooses Egemin to automate new distribution center
The DC will allow Domus Logistics to save up to 5,000 truck transports per year. The activities of five of its external partners will also be...
Improving Worker Safety with Automatic Tank Gauging
By Christoffer Widahl, Emerson Automation Solutions
Manual tank gauging at oil and gas extraction sites is a dangerous and potentially fatal...
HIMA announces framework agreement with Pepperl+Fuchs
The agreement comprises the jointly developed H-system termination boards and associated modules from Pepperl+Fuchs, which are connected through...
CMR announces opening of Thailand automation engineering operation
The Bangkok-based operation will provide a range of engineering services, including switchboard supply and fabrication, to the country’s sugar...
Honeywell and Seeq announce collaboration on Honeywell Connected Plant initiative
This joint development agreement is intended to help customers minimize unplanned shutdowns, maximize output, minimize safety risk and optimize...
Huffman Engineering announces opening of Denver office
The expansion allows Huffman Engineering to accommodate a growing client base in the western part of Nebraska, as well as Colorado and Wyoming.