Project Reference List

Project: Hogsmill STW
Year: 2006
Client: Thames Water
Country: UK
Value: ?418,000.00
Description: Design, supply, installation, testing and commissioning of the replacement diffuser system on the six lanes of the sewage treatment works with flow capacity equivalent to a population of 400,000. The work involved draining down each successive aeration lane, inspection for damage and repair, removal of existing diffusers, partial re-filling of the lane and testing of the diffusers, re-commissioning of the lane, while maintaining throughput with the remaining five lanes. The scope also included installation of new valves, electrics, DO instruments and control valves.

Project: Knust Olympic Swimmimg Pool Refurbishment
Year: 2006
Client: E.P. Ghana
Country: Ghana
Value: ?58,000.00
Description: Design and supply of swimming pool filter/backwash pumps and air scour blower complete with pipework, valves and associated electrical switchgear.

Project: Knust STP Refurbishment
Year: 2006
Client: Knust University
Country: Ghana
Value: ?155,000.00
Description: Additional design, supply, installation and commissioning of raw sewage pumping pipeline, and replacement penstocks and valves, for existing S.T.P.

Project: Lasham Gliding Club STP
Year: 2006
Client: Lasham Gliding Club
Country: UK
Value: ?58,000.00
Description: The effluent discharge from the existing cess pit was not meeting consent. Naston was responsible for design, supply, installation and commissioning of an effluent reception tank with duty/standby pumps pumping to a rotating biological contactor (RBC). The treated effluent transfers by gravity to a settlement tank where the remaining particulate sludge sinks to the bottom and is pumped back to the inlet of the cess pit. The final effluent weirs over into a collection collar and discharges to the soak away.

Project: Lilleshall Sports Centre STP
Year: 2006
Client: Sport England
Country: UK
Value: ?280,000.00
Description: Design, supply, installation, testing and commissioning for 210 m3/day concrete SAF plant using existing septic tanks and humus tank producing effluent of BOD 15 mg/l and ammonia 5 mg/l.

Project: Poole WwTW - Odour Control & Chemical Dosing Removal
Year: 2006
Client: Wessex Water
Country: UK
Value: ?1,050,000.00
Description: Odour Control Design, supply, installation, and commissioning of the refurbishment of the odour control system for the Poole Sewage Treatment Works. This work involved refurbishment and enhancement of the existing stream 1 BAFF plant odour control system and connection of the sludge process tanks and buildings to the same odour control unit. The system includes GRP ductworks, flow balancing and activated dampers, fans, pH, ORP, H2S and methane monitoring, including all controls and safety systems. Chemical Dosing Renewal Design, supply, installation and commissioning of the renewal and upgrading of the total chemical dosing system. The work included ferric sulphate, caustic soda and polyelectrolyte dosing packages, complete with all controls. The work was completed with minimum managed disruption to the existing supply.

Project: Rudston Emergency Works
Year: 2006
Client: Costain Haswell (Yorkshire Water)
Country: UK
Value: ?12,000.00
Description: Routine replacement of media on SAF plant.

Project: Sandend Pump Station
Year: 2006
Client: Morrison Construction (Scottish Water)
Country: Scotland
Value: ?90,000.00
Description: Design, supply, installation and testing of 5.3l/second sewage pump system complete with screen pipework, valves, MCC and telemetry.

Project: Troqueer WwTW - Aeration Scheme
Year: 2006
Client: Scottish Water
Country: UK (Scotland)
Value: ?171,000.00
Description: Following successful design, installation and testing of a new fine bubble diffuser system on the first lane, Naston was responsible for the design, supply, installation and commissioning of the replacement fine bubble diffuser system on the remaining three lanes. The system includes stainless steel lift out grids with Envicon tubular fine bubble diffusers, plus control instrumentation. This will provide improved effluent quality and reduced power costs.

Project: Fortrose WwTW
Year: 2005
Client: Scottish Water (Morrisons)
Country: Scotland
Value: ?1,150,000.00
Description: Design, supply, installation, testing and commissioning of a membrane bioreactor plant to treat up to 1975m3/day domestic sewage. The project also included the raw sewage and final effluent pump stations, storm screening, 3 mm inlet screens, sludge thickening and storage with new blowers and MCC, installed in a purpose built operations building. Naston provided a complete Subcontract package including all process, mechanical and electrical works, including building services, site lighting and other site infrastructure works.