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
Intermountain Electronics Overcomes Underground Mining...
First-ever Horizontal Application of Allen-Bradley PowerFlex 755 Variable Frequency Drives MORE
Kepware connects 17 plants of Cascades Tissue Group
Using Kepware’s KEPServerEX, Cascades now supports communications across all of its seventeen plants, seventeen paper machines, and nearly ninety... MORE
Barcelona Airport Takes Off with Integrated Command and...
Wonderware software integrated all their existing disparate systems, achieved reliable and cost-efficient control, enabled safe operations and... MORE
Rockwell Automation controls Ridgeline Pipe Manufacturing
Ridgeline Pipe manufactures about 125 different PVC pipe products that vary in length, diameter, color, markings and other requirements.... MORE
PPCL to fix control room alarms at Atlantic LNG plant
Process Plant Computing Limited will streamline control room alarms across four LNG trains at Atlantic's Point Fortin plant, on the southwest coast... MORE
ISA100 signs Centero as Distributor for Wireless Test...
Centero will distribute and support the ISA100 Wireless Device Test Kit and ISA100 Wireless Stack Test Kit. MORE
HIMA to supply safety solution to Daqing Petrochemical
Daqing Petrochemical Company will use the HIMA FlexSILon TMC solution for safely controlling turbomachines at its gasoline desulfurization plant... MORE