Biwater Treatment Limited has contracted BHR Group Limited to perform physical modelling of the proposed modifications to Eastbourne STW. The existing process is being extended on behalf of Southern Water to include secondary treatment.

Today's needs of greater capacity and improved utilisation of assets invariably place demands on existing structures to handle increased flows of waste water. To ensure structural modifications will be able to perform satisfactorily under more arduous conditions, Water Companies often request that proposed modifications are physically modelled during the design and development phase. The process of physical modelling requires great expertise since it is not an exact science but is the most accurate way of predicting fluid behaviour, apart from taking measurements at full scale.

Two pump sump models have been constructed by BHR Group to assess hydraulic performance over a range of operating conditions. This has enabled difficulties arising from the refurbishment of existing plant, in terms of control strategy and structural modifications, to be identified at an early stage in the design process. Two further structures are also being physically modelled to optimise flow distribution.

PRW 8.6.2001

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