Source: https://tendernation.io/opportunities/01a13c2c-2105-71f2-9fdf-b32471569ca6/high-density-sludge-hds-plant-design pending GB open procedure Suitable for SMEs # High density Sludge (HDS) plant design [The Coal Authority](https://tendernation.io/buyers/the-coal-authority) Estimated value Not stated Published 28 Aug 2018 Deadline Rolling deadline ## Who can bid - Buyer says suitable for SMEs The buyer ticked “suitable for SMEs” on the notice. Anyone can still bid. - Open procedure Anyone can submit a full tender; there is no shortlisting stage. [More contracts for small businesses and VCSEs](https://tendernation.io/opportunities/for-small-businesses) ## About this tender The Coal Authority operate over 75 minewater treatment schemes that remove contaminating metals from mine water prior to the treated water being discharge into a receiving watercourse. Schemes range from complex process engineering plants, through pumped wet wells and boreholes/mineshafts, to totally natural (passive) schemes without a power source. A number of sites require the addition of pH correcting or oxidising reagents. Flow rates range from circa 5 litres/sec to 400 litres/sec. A standard pumped treatment scheme utilizes 32 digital inputs, 8 analogue inputs and 8 digital outputs. The majority of treatment schemes comprise of aeration cascades, settlement ponds and reed beds. All schemes are subject to regulatory consents and licenses. The Coal Authority is now considering the potential of High density Sludge (HDS) plants in treating mine water (acidic and alkaline) as well as the potential benefits that can be achieved with a sludge management system. From a Coal Authority perspective, the sludge generated (principally ochre) would be predominantly iron oxy-hydroxides with other metal hydroxides. The characteristics of the resultant ochre from a HDS plant are a consideration for the Coal Authority, as potential markets for ochre may arise in the future. Areas of interest of the Coal Authority include: • Sample collection and preparation • Laboratory testing • Pilot testing (off and on site) • Analytical Capabilities • Plant conceptual design • Whole life costs We would like to invite interested companies to meet with us at our Mansfield office during September / October 2018 to better understand our requirements and offer suggestions on how we might fulfil our objectives through a future tender process. Once the Coal Authority has assessed interest, it will advise on if meetings are to be conducted on an individual basis or as a group with multiple companies present. If you have any queries please express your interest by contacting no later than 18 September 2018 Participants should note that we reserve the right to use any information shared within this market engagement to develop a mature service specification for future procurement purposes. Any costs incurred by participating in this exercise must be borne by the participating organisations. Following this exercise we shall determine if and how we will approach the market to secure the services. Please note that any future procurement will be subject to a separate advertisement Read full description ## CPV classification Plant engineering design services Source Contracts Finder (UK) [View official notice](https://www.contractsfinder.service.gov.uk/notice/b6c2b5b9-06c0-4c7c-b5f8-af1aeac4f773) Never miss a tender like this again Get AI summaries, deadline alerts and a bid pipeline for tenders matched to your business. Free to start. 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