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YEAR:
Major works included:
The construction of a 60m x 20.6m x 5.6m high reinforced concrete Bioreactor tank including under ground tank drainage, mud valves, penstocks, walkways and handrails.
The construction of a 42m diameter x 5.2m high pre-stressed, post tensioned clarifier tank set 4.0m below ground level. The tank included 48 pre-stressed curved panels and 4 pre-stressed pilaster panels used for post tensioning the tank, pre-cast launder trough, 825mm dia inlet pipe, 375mm dia RAS line, secondary effluent, scum and tank drain lines.
Installation of interconnecting pipework
Supply, installation, testing and commissioning of the clarifier mechanism.
Hydro static testing of the bioreactor and clarifier tanks and their associated pipelines.
Innovation:
Redesign of the clarifier launder trough from cast in-situ to precast units which enabled these to be precast ahead of time and reduced installation work on site, the overall programme and costs.