Yorkshire Water has gone out to tender with a contract for its Hull & Huddersfield sewage and sludge treatment project worth an estimated £75 million.
Yorkshire Water is proposing to build a new regional sludge treatment facility at its Upper Brighouse Site in Huddersfield, with a treatment capacity of 16,500 tds/annum. Known as the Calder Valley Incinerator (CVI), the works will include the following:
- new sludge reception facilities for indigenous sludge
- imported liquid and cake
- thickening
- digestion
- biogas collection and storage
- dewatering facilities including lime stabilisation
- and the provision of a sludge liquor treatment plant to discharge the treated liquors to an adjacent sewage treatment works.
Bio-gas from the digestion process will be collected and processed to optimise the net operating costs using either CHP or Gas to Grid technology.
Yorkshire Water is also planning to build a new flow to full treatment (FFT) inlet works at its Saltend Waste Water Treatment Works in Hull with a peak flow capacity of 2,000l/s.
The works are expected to include coarse screening, grit removal and fine screening, with screens handling, grit handling, odour control and liquor return pumping. The existing inlet works will be retained and configured to continue treating storm flows.
Works on the Sludge Treatment Facility (STF) and the aerobic digestion plant will include new cake and liquid import facilities with sludge screening, refurbishment of the existing polymer plant, new digester feed system, inspection, refurbishment and upgrade of the existing digester vessels, new digester heating and bio-gas systems and a new de-watering facility which includes lime stabilisation.
The scope will include refurbishment of the site potable and final effluent water systems and ensuring odours created by the new assets are effectively managed.
The contract is being tendered in various combinations in five Lots.
Time limit for receipt of tenders or requests to participate is 7th August 2017. Click here to access the tender documentation.