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
OSI EMS Technology selected by European transmission system operator in Slovakia
OSI will supply a state-of-the-art SCADA/EMS system that will effectively manage the transmission system for the entirety of the Slovak Republic.
Siemens to supply propulsion systems for all-electric ferries
The all-electric ferries operated by Fjord1 will ply the E39 Anda-Lote route on the west coast of Norway. Both will have a cargo capacity of 120...
Country Maid turns to Rockwell Automation to automate production
Country Maid had to add an additional line to help meet demand. They could either replace their mixer with a larger one, which would require...
Bedrock provides SCADA RTU platform for Clarksville Light and Water
The project is part of Clarksville, Arkansas' plan to save up to $2M over the next five years through improved control, monitoring, and security of...
Stahlin's enclosures provide protection for ECS compost temperature sensors
Engineered Composted Systems needed a strong corrosive resistant NEMA 4X enclosure that could survive this environment and protect their RF...
Open Process Automation Movement Taking Form at ExxonMobil's 2nd Industry Day
By Bill Lydon, Automation.com
The event, a follow-on to the successful 1st End User Industry Day event in June, provided the opportunity for more...
Beckhoff opens Texas sales and support facility
The eighth such regional facility in the U.S., the Plano facility includes sales offices, engineering labs and training facilities. This 2,600...
Egemin to build automated warehouse for Poco Loco snack foods
The new warehouse is part of a 50 million Euro project that will allow Poco Loco to centralize its storage in one location, giving it even more...
ABB releases update for System 800xA Minerals Library
The latest version expands plant operators’ ability to monitor and control safe production through direct object linking
Webinar: Digitalizing Predictive Maintenance
Learn how new technological advances are resolving not only these issues but also allowing for new value to be realized through the digitalization...