Southern Water is seeking supply chain engagement for input on its plans to design and build two Water Recycling Centres.
The water company is carrying out a market engagement exercise on the supply of Water Recycling (re-use) Services. Southern Water is inviting potential suppliers to contribute to its market research with the aim of better understanding market capabilities.
The utility’s Water Resource Management Plan 2019 (WRMP19) has proposed the provision of Water Recycling to support existing water resources in drought events up to a 1 in 200 year return period.
Southern Water’s long term strategy includes further utilisation of the water recycling process in AMP8 and beyond.
The water company says that from the plan there is a requirement for the design, construction and potential operation of four Water Recycling Plants (WRPs).
Two of the projects set to pioneer the application of water recycling within the UK are to be constructed close to Maidstone and one close to Littlehampton. The plants are required to be constructed and commissioned by 31 March 2027. The project overview for both plants is as follows:
Littlehampton WRP
The plant will treat flows from an existing coastal wastewater treatment works and will be required to produce up to 25Ml/d of recycled water suitable for discharge to an inland water course. Waste products will be treated and discharged to an existing long sea outfall. The design and build of the transfer pumping station and main is the subject of other contracts.
Maidstone WRP
The plant will treat flows from an existing wastewater treatment works. The WRP will be required to produce up to 21.5Ml/d of recycled water suitable for discharge to an inland water course. Waste products will be treated and either discharged via an existing outfall or transferred to a nearby WTW for dilution and treatment. The design and build of the transfer pumping stations and mains is the subject of other contracts.
Services required for the projects include:
- Design and construction of the Biological Treatment process - expected to be MBR or equivalent to enhance the existing treatment. This will include additional sanitary and nutrient removal treatment prior to the Advanced Water Treatment.
- Design, construction and potential operation of Advanced Water Treatment ((AWT) e.g., Reverse Osmosis, UVAOP, Remineralisation). Design of the Advanced Water Treatment will enable the discharge of the treated water into an inland water course.
- Definition of the design envelope of the flows and loads to be transferred by the pumping station and transfer pipelines contracts.
The proposed delivery route for the entire programme identifies three separate packages of work:
- Biological Treatment process: design and construction
- Advanced Water Treatment; design, construction and operation
- Pipeline: design and construction
Initial package of works will be for the design and construction of the Biological Treatment process - design services will also be sought as part of the same package of works to support the development for the process parameters for the AWT.
Southern Water intends to hold a virtual presentation commencing 9am on 18th May and is inviting interested suppliers to register their interest in attending by 15th May 2023. The water company expects to go out to tender with a formal contract notice by December 2023.
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