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Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids, and gases from water. The goal is to produce water that is fit for specific purposes. Most water is purified and disinfected for human consumption, but water purification may also be carried out for a variety of other purposes, including medical, pharmacological, chemical, and industrial applications. The history of water purification includes a wide variety of methods. The methods used include physical processes such as filtration, sedimentation, and distillation; biological processes such as slow sand filters or biologically active carbon; chemical processes such as flocculation and chlorination; and the use of electromagnetic radiation such as ultraviolet light.
The Kempton Park steam engines are two large triple-expansion steam engines, dating from 1926–1929, at the Kempton Park Waterworks in south-west London. They were ordered by the Metropolitan Water Board and manufactured by Worthington-Simpson in Newark-On-Trent.
The Staines Reservoirs are two large pumped storage reservoirs sitting to the east of the King George VI Reservoir near Heathrow airport in Surrey within the Colne Valley regional park. The village of Stanwell is mainly to the north east, and the town of Staines is to the south.
The Queen Mary Reservoir is one of the largest of London's reservoirs supplying fresh water to London and parts of surrounding counties, and is located in the Borough of Spelthorne in Surrey. The reservoir covers 707 acres (2.86 km2) and is 45 ft (14 m) above the surrounding area.
The Knight Reservoir is a large pumped storage reservoir located in the Borough of Elmbridge in Surrey. It was inaugurated in 1907 and stores up to 2,180 million litres of raw water abstracted from the River Thames prior to its treatment and supply to London and north Surrey. It is located south of the River Thames, west of West Molesey, and between Hurst Road (A3050) and Walton Road (B369). It is adjacent to, and west of, its twin Bessborough Reservoir.
London's water supply infrastructure has developed over the centuries in line with the expansion of London.
Hanningfield Reservoir is a large 25,500-million-litre (900,000,000 cu ft) pumped storage reservoir located between Billericay and Chelmsford in Essex. It has a surface area of 352 hectares and is owned and operated by Essex and Suffolk Water.
Kempton Park Reservoirs are a Site of Special Scientific Interest in the London Borough of Hounslow and Kempton Park in Surrey. It is owned by Thames Water. It is part of South West London Waterbodies Ramsar site and Special Protection Area Kempton Park East reservoir is also a local nature reserve.
The City of Nottingham Water Department (1912–1974), formerly the Nottingham Corporation Water Department (1880–1912), was responsible for the supply of water to Nottingham from 1880 to 1974. The first water supply company in the town was the Nottingham Waterworks Company, established in 1696, which took water from the River Leen, and later from springs at Scotholme, when the river became polluted. Other companies were set up in the late 18th century and in 1824, while in 1826 the Trent Water Company was established. They employed Thomas Hawksley as their engineer, who became one of the great water engineers of the period, and Nottingham had the first constant pressurised water supply system in the country. The various companies amalgamated in 1845, and Hawksley remained as the consulting engineer until 1879.
Cricklewood Pumping Station was built in 1905 to supply water to London's north west suburbs. It is situated at the eastern extremity of Gladstone Park, Cricklewood and is a locally listed building.
Essex and Suffolk Water is a water supply company in the United Kingdom. It operates in two geographically distinct areas, one serving parts of Norfolk and Suffolk, and the other serving parts of Essex and Greater London. The total population served is 1.8 million. Essex and Suffolk is a 'water only' supplier, with sewerage services provided by Anglian Water and Thames Water within its areas of supply. It is part of the Northumbrian Water Group.
Edinburgh Water Company and its successors have provided a public water supply and latterly sewerage and sewage treatment services to the Scottish capital of Edinburgh since 1819. The original company was established to supply drinking water and did so until 1870, when it was taken over by a public Water Trust, with representatives from Edinburgh, Leith and Portobello. That in turn was taken over by Edinburgh Corporation and in 1975, responsibility passed to the Lothian Regional Council, as did the duty to provide sewerage and sewage treatment services. Both services were moved out of local authority control, and taken over by the East of Scotland Water Authority in 1996. The three Scottish regional water authorities were merged to form Scottish Water in 2002.
Glasgow Corporation Water Works and its successors have provided a public water supply and sewerage and sewage treatment services to the Scottish city of Glasgow. There were several schemes in the early part of the 1800s, with the Glasgow Company which was established in 1806 pumping filtered water from the River Clyde into the city. The Gorbals Gravitation Water Company was established in 1846, and brought water from reservoirs to the south-west of the city. However, an outbreak of cholera in 1848/1849, in which 4,000 people died, concentrated the minds of Glasgow Council, and in 1855 a scheme to use water from Loch Katrine, 36 miles (58 km) to the north, was authorised. The work required at Loch Katrine was quite modest, and the major construction work was the building of an aqueduct to carry the water to the city by gravity.
Liverpool Corporation Waterworks and its successors have provided a public water supply and sewerage and sewage treatment services to the city of Liverpool, England. In 1625 water was obtained from a single well and delivered by cart, but as the town grew, companies supplied water to homes through pipes. There were two main companies by the 1840s, but the water supply was intermittent, and there was general dissatisfaction with the service. Liverpool Corporation decided that such an important service should be provided by a public body, and sought to take over the water supply companies.
The Newcastle and Gateshead Water Company supplied drinking water to the towns of Newcastle upon Tyne and Gateshead, in the north east of England, from 1845 until 1974. It was initially called the Whittle Dean Water Company, but changed its name in 1863, and gradually increased the area which it supplied. It became part of the Northumbrian Water Authority in 1974 when the UK water companies were nationalized.
The Walton water treatment works are an advanced purification works supplied with raw water and producing and delivering potable water to the locality and into the Thames Water ring main. The Walton water treatment works were initially built in 1907 north of the Bessborough and Knight reservoirs which supply the water works.
The Coppermills Water Treatment Works is a large water treatment works in the Lea Valley in east London. Completed in 1969 by the Metropolitan Water Board, it is now owned and operated by Thames Water. In 2009, Coppermills was connected to the Thames Water Ring Main via the Northern Extension Tunnel, enabling the facility to be a major supplier of water to the whole London area. It is capable of supplying a maximum of 680 million litres of water per day.
Ashford Common water treatment works is located in Ashford Surrey and supplies potable water to west London via the local distribution network and the Thames Water ring main. The works were constructed in the 1950s, and were modernised in the 1990s to increase the output.
The Hornsey water treatment works in north London abstracts raw water from the New River and supplies treated potable water to Hornsey and surrounding districts. The treatment works were first constructed in 1862 and have been modernized and remodeled several times and still provide clean water to consumers in north London.
Hampton Water Treatment Works are water treatment works located on the River Thames in Hampton, London. Built in the second half of the 19th Century to supply London with fresh water, the Waterworks was in the past a significant local employer, and its brick pumphouses dominate the local landscape. The Waterworks are currently owned and operated by Thames Water, occupying a 66 ha site located between the Upper Sunbury Road (A308) and the River Thames. The Waterworks currently has a maximum output of 700 megalitres a day, and supplies ~30% of London's fresh water.
References
- ↑ London Metropolitan Archives (1897-1902). "STAINES RESERVOIR JOINT COMMITTEE: WATER SUPPLY AND DISTRIBUTION" . Retrieved 13 August 2023.
{{cite web}}: CS1 maint: numeric names: authors list (link) - 1 2 3 4 "Kempton steam museum" . Retrieved 13 August 2023.
- ↑ Hazen (July 1953). "Application of the Microstrainer to Water Treatment in Great Britain". Journal of the American Water Works Association. 45 (7): 723–737.
- 1 2 3 Evans, Helen (2003). "An Assessment of the Benefits Afforded by the Continuous Versus Intermittent Operation of Ozone for Drinking Water Treatment". Ozone: Science & Engineering The Journal of the International Ozone Association. 25 (5): 417–430.