Project Reference List

Project: Freshwater East WwTP
Year: 2004
Client: Welsh Water
Country: UK (Wales)
Value: ?139,000.00
Description: Design, supply, installation and commissioning of a SAF treatment plant (2 streams @ 150 M3/day each), complete with final settlement tank, D/S blowers and control panel, and automatic desludging from the final settlement tank.

Project: Iver Gasless
Year: 2004
Client: Three Valleys Water
Country: UK
Value: ?557,000.00
Description: The principal source of raw water to Iver is from the River Thames via Sunnymeads intake works, but in time of pollution incidents or high nitrate levels water can be drawn from Thames Water reservoirs to fully or partially replace the river abstraction. The existing works provides treatment using re-ozonation, coagulation and pH adjustment, floc blanket clarification followed by inter-ozonation and GAC adsorption. Disinfection is by chlorine, followed by de-chlorination at the treated water pumping station using sulphur dioxide. Due to the volume of gaseous chlorine and sulphur dioxide stored on the site under pressure, the current Iver Works is defined as a 'Tier 1' site under the Control of Major Accidents and Hazards (COMAH) Regulations. This project has been completed to eliminate the storage of these chemicals and has removed the works from the restrictions imposed by the Regulations. This was achieved by the installation of bulk sodium hypochlorite and sodium bisulphate storage and dosing for water treatment purposes. Naston designed, supplied and installed the necessary dosing system and associated control systems, all of which were integrated into the existing plant.

Project: Nairn UV WwTW
Year: 2004
Client: Scottish Water
Country: UK (Scotland)
Value: ?340,000.00
Description: Design, supply, installation and commissioning of a 140 l/s UV treatment process, including provision of an upstream balancing tank and final effluent discharge pumping station, and all monitoring controls and SCADA.

Project: Oxford Services WwTP
Year: 2004
Client: Welcome Break Group
Country: UK
Value: ?129,000.00
Description: Design, supply, installation and commissioning of a 150 M3.day submerged aerated filter (SAF) package sewage treatment plant, removing ammonia from the effluent from existing overloaded STP. The plant is mounted in a below ground concrete tank and serves the M40 motorway restaurant and associated facilities.

Project: Porthgain, Reynoldston & Titley (IMBR) WwTP
Year: 2004
Client: Welsh Water
Country: UK (Wales)
Value: ?475,000.00
Description: These are three Immersed Membrane Bioreactor sewage treatment plants incorporating the flat plate Toray membrane. Porthgain: 1.5 l/s (500 pe) package plant. Titley: 1.5 l/s (500 pe) package plant, complete with pumping station, copa sac chamber and forward feed pumping station. Reynoldston: Treatment plant rated @ 8.5 l/s (3000 pe), complete with RAS pumps, instrumentation, Form 4 MCC/PLC control panel complete with GRP kiosk, and cable installation. They incorporate SCADA and telemetry for remote monitoring to reduce requirement for supervision of operation.

Project: Shaftesbury Advancement WwTW
Year: 2004
Client: Wessex Water
Country: UK
Value: ?252,000.00
Description: Design, supply, installation and commissioning of a new storm/aeration tank and supporting equipment. In the storm mode the 9 m dia. 260 M3 tank is used as an addition to the existing works capacity with a bridge scraper and return pumps to recirculate flows via actuated valves and piping. In the aeration mode a new jet pump and instrument system supplement the existing works capacity. Both systems use a new MCC with PLC/Profibus and telemetry control.

Project: Sway STP
Year: 2004
Client: Southern Water
Country: UK
Value: ?15,000.00
Description: Design, supply, installation and commissioning of a Sewpas airlift type primary desludge unit.

Project: Cumnock, Glespin, Plains, Johnston, Philipshill 2, Forgandenny, Birnham & Dunkeld, Newtyle, Guildtown, Longside, Fettercairn, Coupar Angus, Loch Turrett, Ferniegair, Cowdenbeath, Wolfhill, Torthorwald, Camphill WwTWs
Year: 2003
Client: Scottish Water
Country: UK (Scotland)
Value: ?1,600,000.00 (Turnkey) in 2003 - (total for all twenty schemes)
Description: The projects are a continuation of Naston's Minor Waste Water Works framework with Scottish Water. Naston carried out a process audit on each scheme to produce a fully detailed costed target price. The work includes process analysis, design, supply, installation and commissioning of the works while maintaining operation of the existing schemes. The scope of supply includes supply of membrane plant, pumps, blowers, inlet screens, tanks, valves and piping instrumentation, electrics, controls and civil works.

Project: Waters Edge Contaminated Water Treatment Plant
Year: 2003
Client: North Lincolnshire County Council
Country: UK
Value: ?404,000.00 (Turnkey and 3 year operation) in 2000 to 2003
Description: Turnkey design, supply, installation, commissioning and operation of water treatment plant suitable for handling 10 M3/hr of contaminated pond water which will form part of an environmental project to restore an old chemical plant site. The plant included all civils, ammonia scrubbing tower, GAC filters, plus all chemical dosing, electrics and controls. Naston will operate the plant for 3 years, following which the plant will be decommissioned.

Project: Westwood WwTW
Year: 2003
Client: Sutton and East Surrey Water Co.
Country: UK
Value: ?496,000.00 (Turnkey) in 2003
Description: Design, supply, installation and commissioning of new contact tank and chemical dosing facilities to provide chloro-ammoniation and plumbosolvency prevention. The contract includes process design, civil, mechanical and electrical works and systems integration with the existing works SCADA system. The scope included provision of storage and dosing plant for orthophosphoric acid, caustic soda and ammonia, as well as modifications to the existing chlorine and sulphur dioxide systems.