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

woodplc.com

Transforming Victorian assets to deliver water through the 21st century

Upgrades of Sunderland Groundwater Stations Susan Robinson

CEng, CEnv, FIMechE, FCIWEM

Associate Director Wood plc

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

Groundwater stations – 21st century requirements

2 A presentation by Wood.

Some challenges of historic pumping station ‘ageing assets’

3 A presentation by Wood.

New Winning GWS ~1920 150m shaft at south of building 2nd shaft at N, other wells, adits Stoneygate GWS - 1890. Grade II. listed Adjacent to A690 near A19 110 m shaft below engine house Some made ground. Fulwell GWS – 1852. Grade II listed. 45m shaft below engine house

Courtesy of Bing

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.

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

Good quality water - timeline of treatment

4

Locating the plant

5 A presentation by Wood.

Efficient and flexible operation

6 A presentation by Wood.

Variable speed pump

Automated start-up to ensure stable water quality put into supply, and prolong filter life. Dechlorination of waste steam where 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.

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

Safe maintenance - Man entry avoidance

7 A presentation by Wood.

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

• utput, less start-up/wasted water.

Automated start-up. Improvements to accessibility. Safe to maintain Pumps installed /removed from ground level. Effective management of ageing assets Surveys and recommendations. T argeted replacement of pipework and valves.

Meeting 21st century requirements

8 A presentation by Wood.

woodplc.com