Southern Water Services Limited
Kent Bioresources Request for Information
The procurement contact named on the official notice.
Project Purpose Southern Water Services Limited (SWS) is initiating the Kent Bioresources Project to modernise and consolidate its sludge treatment operations across Kent.
The project forms a key part of SWS’s long-term bioresources strategy to deliver a more efficient, resilient, and compliant asset base aligned with future environmental standards and the company’s AMP8 priorities.
Background Southern Water currently treats approximately 6 million m³ of sewage sludge per year across its wastewater treatment network, operating 16 sludge treatment centres (STCs) supported by a large transport and recycling operation.
In Kent, the current system comprises seven STCs processing around 42,000 tonnes dry solids (TDS) annually.
A combination of ageing infrastructure, evolving regulation, and tightening environmental standards — including restrictions on landbank use, air-emission limits, and emerging contaminants such as PFAS — necessitates a shift toward advanced, centralised treatment solutions.
Project Vision The Kent Bioresources Project proposes to consolidate seven existing sludge treatment centres into three new “super-sites” that will employ Advanced Anaerobic Digestion (AAD), CHP biogas utilisation, or biomethane upgrading for grid injection.
The indicative preferred sites are: • Ashford STC (South Kent) • Ham Hill STC (North Kent) • Motney Hill WTW (Medway) – this has been added since the last market engagement.
Sites are expected to require full redevelopment, including new reception, digestion, dewatering, and energy recovery infrastructure.
We also have commenced feasibility studies for plants in Hampshire and Sussex to be upgraded to AAD too.
Delivery Approach Southern Water is exploring delivery through a single third-party DBFOM (Design, Build, Finance, Operate, Maintain) contract, though alternative contracting structures remain open for market input.
Indicative features include: • Long-term, performance-based contract structure. • Off-balance-sheet treatment of capital investment preferred. • Potential Special Purpose Vehicle (SPV) or consortium delivery model. • Opportunities for collaboration among civil contractors, technology providers, funders, and operators.
What the supplier must deliver
The project forms a key part
The project forms a key part of SWS’s long-term bioresources strategy to deliver a more efficient, resilient, and compliant asset base aligned with future environmental standards and the company’s AMP8 priorities.
Sites are expected to require full redevelopment
Sites are expected to require full redevelopment, including new reception, digestion, dewatering, and energy recovery infrastructure.
Southern Water is exploring delivery through
Southern Water is exploring delivery through a single third-party DBFOM (Design, Build, Finance, Operate, Maintain) contract, though alternative contracting structures remain open for market input.
Derived from the notice text — always confirm against the original documents.
Make the case to bid
Reveal who to approach at Southern Water Services Limited, and generate a go-to-market strategy from their news, accounts and people.
The full intelligence dossier
Our agent reads Southern Water Services Limited’s accounts, hunts live signals, finds the people who decide — and hands you a bid strategy plus a go-to-market influence plan, including what your team should post this week. You approve every paid step.
Ask me about this tender, the buyer, who wins their work, or whether you should bid.
- OCID
- ocds-h6vhtk-05e09c
- Stage
- planning · planning
- Source
- Find a Tender
- Buyer ref
- 002717-2026
Contains public sector information licensed under the Open Government Licence v3.0. Source data © Crown copyright.
Who wins this kind of work
The suppliers and buyers around this opportunity — drawn from official award data. Drag to orbit; click a node to explore.
Top suppliers & buyers in Construction
Southern Water Services Limited’s tender network
Assembling the network…