Scope: Construction of Sequence Batch Reactor and associated process buildings.
Liverpool Wastewater Treatment Works’ (WwTW) existing, second stage treatment Baff plant had problems blocking up, which led to premature discharges from the works to the River Mersey. It was decided that a more robust treatment process was required and that a sequencing batch reactor (SBR) would be built on two levels within Wellington Dock adjacent to the existing works.
The completion of all formwork and reinforced concrete works with approximately 50,000m³ of concrete and over 12,000 tons of steel the scheme offered a significant challenge in the reclaimed previous dry dock adjacent to the existing Sandon Dock site.
The two storey building covers a footprint of 18,400m², and is divided into eight cells which was then repeated to the second floor. With fifty six, 9.7m high columns to each cell programme and planning the works safely, efficiently and productively was paramount.
The base pours were completed by the end of January 2013 with the walls and columns to the first four cells sufficiently completed to allow the soffit installation works to commence.