Sludge-treatment works

Tender description

Irish Water is currently upgrading the Ringsend WwTP, which treats most wastewater arising in the Greater Dublin Area (GDA), based on the application of aerobic granular sludge technology (Nereda®). The capacity of the upgraded WwTP will be approximately 2 400 000 population equivalent (PE), with 1 PE assumed to be 60 g BOD/day. Consequently, the existing sludge line needs to be upgraded to accommodate the increased load. The upgrade of the existing sludge line will involve upgrades to the existing thermal hydrolysis plant, modifications to the existing digesters and other ancillary works in the sludge treatment buildings. This PIN relates to the modification of the digesters only. The other works will be delivered by a main contractor appointed by Irish Water.This project will provide only for the increase of mesophilic digestion capacity. (As per PIN Document). Irish Water is considering inviting tenders for contracts for technology delivery which will comprise the design, implementation, and operational handover of a continuously controlled process providing increased digester capacity, subject to specific performance guarantees. (‘Digestion capacity increase project’). The services will be provided by a technology delivery provider (TDP).