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The United Utilities flagship CASS SBR (Cyclic Activated Sludge System Sequencing Batch Reactor ), constructed
in the old Wellington Dock heritage site, moves into its fourth, and final year of build. The £200 million Liverpool
WwTW upgrade is a state-of-the-art works to improve the quality of the water in the River Mersey. The project
is part of the £3.6 billion being invested by United Utilities in AMP5 across the North West, to improve water quality
and the environment.