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BidSonar is an independent index of public-sector opportunities. We aggregate data from official sources and are not affiliated with any procurement body. Data is licensed under the Open Government Licence v3.0 and the EU TED reuse notice.

    ContractsBiogas Systems and Tank Maintenance Services
    Closed contract

    Biogas Systems and Tank Maintenance Services

    Southern Water seeks experienced suppliers to design, install, and maintain biogas digesters, biogas assets, and non-concrete tank systems across their water and wastewater operations.

    🇬🇧United Kingdom· EnglandPublished 19 Jun 2026· 4 months agoviaFind a Tender

    Decision brief

    4 fields
    • Contract value
      Not disclosed
      Source did not declare a figure
    • Closing date
      Not published
      No closing date published
    • Sector
      Manufacturing
      Browse related listings
    • Location
      🇬🇧United Kingdom
      England

    Lifecycle

    Closed

    No longer open. Published 4 months ago.

    19 June 2026
    Closed — no tender deadline was published

    Brief

    Southern Water is seeking suppliers to provide comprehensive services for the design, manufacture, installation, and maintenance of biogas and digester assets, plus non-concrete tank systems across their water and wastewater operations. Services required include: design and specification, manufacture and/or supply, installation and commissioning, planned preventative maintenance (PPM), reactive maintenance and repair, refurbishment and replacement, and process optimisation and performance improvement. The opportunity covers three key areas: (A) Digester Systems - maintenance of 43 digesters across 16 Sludge Treatment Centres with major cleaning and maintenance cycles undertaken approximately every 9 years, plus routine inspection and maintenance between interventions; (B) Biogas Assets - support for anaerobic digestion and energy recovery processes critical to operational performance and safety compliance; and (C) Tank Systems - management of 200+ non-concrete tanks used for drinking water storage, wastewater and sewage treatment, process water, industrial effluent, and biogas processes. Suppliers should be prepared to deliver these services across multiple locations and demonstrate capability in asset lifecycle management.

    Track record

    1 award · 1 winner
    Thin record

    Only 1 prior award here — too little to read.

    In manufacturing, Southern Water Services Limited has awarded 1 contract to 1 supplier.

    Who wins here
    1. Siltbuster Limited1× · 100%

    Across manufacturing, the most active winners are Alpine Vending Co Ltd, Scanbur, AIRCO REFRIGERATION AND AIRCONDITIONING LIMITED — the field to beat, or your route in as a partner.

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    Take action
    View on sourceFind a Tender

    Original closed notice on the publisher's site

    Publisher
    UK Cabinet Office
    Licence
    OGL v3.0
    Source
    find-tender.service.gov.uk
    Record ID
    ocds-h6vhtk-06b976

    Track

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    SW
    Buyer
    Southern Water Services Limited
    Sector
    Manufacturing