Sweco’s project team covered process, civil, mechanical, electrical, ICA, geotechnical, structural and hydraulic design components.
The key elements of the design solution were as follows:
• Replacement of existing pipe culvert in Pimperne Brook with new rectangular culvert to carry site roadway
• Construction of 3nr. outfalls to Pimperne Brook
• Replacement of 3nr. borehole pumps and ancillaries, including raising headplates above flood level
• Provision of auto divert facilities from boreholes (based on high turbidity)
• New nitrate removal plant (Ovivo Nitrasep® Advanced Amberpack® process) in the new building
• Nitrate building to house nitrate plant and MCC. Steel portal frame with blockwork walls to half height and timber hit-and-miss boarding above. Pitched steel panel roof, piled foundations and reinforced concrete floor
• Lighting and ventilation to the new building
• Demolition of existing GAC building superstructure and installation of new salt saturators, brine waste tanks in existing bund
• New chlorine dosing facilities
• Replacement of existing balancing tank with new RC tank
• LCPB4 rated security doors to all buildings
• MCCs and distribution boards, control PLCs and telemetry
• Refurbishment of existing standby generator and associated diesel tanks
• Construction of shallow earth bund and diversion channel for overland flow
• Site works and ancillaries