Transforming Victorian assets to deliver water through the 21st - PowerPoint PPT Presentation

Transforming Victorian assets to deliver water through the 21st century Upgrades of Sunderland Groundwater Stations Susan Robinson CEng, CEnv, FIMechE, FCIWEM woodplc.com Associate Director Wood plc

Groundwater stations – 21 st century requirements For the 8 groundwater stations, built 1852 - 1965 Secure supply (44 Ml/d deployable output) • Good water quality • Efficient and flexible operation of sites • Safe to maintain • Initial stage – Availability /accessibility of suitable water Modelling to establish sustainable DO and • locations Water quality review • Asset survey •  All stations to be retained 2 A presentation by Wood.

Some challenges of historic pumping station ‘ageing assets’ Courtesy of Bing Fulwell GWS – 1852. Stoneygate GWS - 1890. Grade II. listed New Winning GWS ~1920 Grade II listed. Adjacent to A690 near A19 150m shaft at south of building 2 nd shaft at N, other wells, adits 45m shaft below engine house 110 m shaft below engine house Some made ground. Steam pumping stations - good access to stores, limited access to (elevated) engine house & shafts below. Some constrained access within buildings. In reasonably good condition – ongoing building maintenance requirements. Very well proven. Often house other plant, control and communication assets. 3 A presentation by Wood.

Good quality water - timeline of treatment Originally – steam driven pumps, no treatment Later – electrically driven borehole type pumps, disinfection, and treatment for plumbosolvency Last 5 years – UV at some sites for protection against coliforms & crypto in raw water Currently – focus on turbidity reduction/removal 4

Locating the plant 5 A presentation by Wood.

Efficient and flexible operation Automated start-up to ensure stable water quality put into supply, Variable speed and prolong filter life. Dechlorination of waste steam where pump appropriate VSDs – for slow start (turbidity mitigation), flexibility of output for efficiency, security and to optimise operating water level, running periods / reduce run to waste. 6 A presentation by Wood.

Safe maintenance - Man entry avoidance All suspended from new top platform Stainless steel pipework with locking couplings (not flanged) Guide tube to lower platform, flare on guide tube through lower opening, pump shroud Man access still possible 7 A presentation by Wood.

Meeting 21 st century requirements Challen lenge Engineer eerin ing s solutio ion t to date Security of supply Modelled. Spread of relatively low abstractions. Pump level settings, variable abstraction, less waste Good quality water Pump flowrates – don’t over-abstract. Can be controlled to particular well level for best quality Automated start-up, so stable water quality put into supply. Treatment for foreseen risks Efficient and flexible operation Standardisation across sites. Variable speed drives on pumps - turbidity mitigation, flexible output, less start-up/wasted water. Automated start-up. Improvements to accessibility. Safe to maintain Pumps installed /removed from ground level. Effective management of Surveys and recommendations. T argeted replacement of ageing assets pipework and valves. 8 A presentation by Wood.

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