Scottish Water has awarded a bioresources contract for sludge treatment services worth an estimated £4.3 million.
The water company went out to tender in July last year to appoint suppliers to de-water and treat wastewater liquid sludge at its waste water treatment sites at Kinneil Kerse (Grangemouth) and Perth.
Supplier requirements for the contract included:
Conformity with the bio-solids assurance scheme and compliance with Hazard Analysis and Critical Control Points (HACCP) plans for each site and ensure the final product meets the criteria of the Safe Sludge Matrix.
Dewatering and treatment equipment must be suitably sized to deal with daily peak flows, produces a final product at 25 ds ± 2 % and maintains a solids capture of greater than 98 %.
Production of an odour management plan, which satisfied Scottish Water, SEPA and the local authority (The Odour Code of Practice) to be adhered to for the duration of the contract
Under the contract the supplier may also be required to provide the provision of labour for ad-hoc/ emergency dewatering activities at Sheildhall WWTW, using SW owned equipment.
Scottish Water will be responsible for organising the transport and recycling of the enhanced product to agriculture.
Initial contract term is 3 years with up to two years further extension options.
Veolia Water Outsourcing Ltd has been awarded the contract, one of four companies in the bidding for the work.
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