John Duncan Watson
Encyclopedia
John Duncan Watson was a British
United Kingdom
The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 civil engineer
Civil engineer
A civil engineer is a person who practices civil engineering; the application of planning, designing, constructing, maintaining, and operating infrastructures while protecting the public and environmental health, as well as improving existing infrastructures that have been neglected.Originally, a...

.

Watson was born in Dundee
Dundee
Dundee is the fourth-largest city in Scotland and the 39th most populous settlement in the United Kingdom. It lies within the eastern central Lowlands on the north bank of the Firth of Tay, which feeds into the North Sea...

, Scotland
Scotland
Scotland is a country that is part of the United Kingdom. Occupying the northern third of the island of Great Britain, it shares a border with England to the south and is bounded by the North Sea to the east, the Atlantic Ocean to the north and west, and the North Channel and Irish Sea to the...

 on 7 March 1860. He specialised in sanitation and was regarded as a pioneer in the development of sewage treatment
Sewage treatment
Sewage treatment, or domestic wastewater treatment, is the process of removing contaminants from wastewater and household sewage, both runoff and domestic. It includes physical, chemical, and biological processes to remove physical, chemical and biological contaminants...

. Watson was engineer to the Birmingham and District Drainage Board and also General Manager to the Birmingham, Tame and Rea District Drainage Board. At Birmingham
Birmingham
Birmingham is a city and metropolitan borough in the West Midlands of England. It is the most populous British city outside the capital London, with a population of 1,036,900 , and lies at the heart of the West Midlands conurbation, the second most populous urban area in the United Kingdom with a...

 he was responsible for the construction of the first large-scale percolating filter plant, a complete departure from the traditional land treatment in use in the city and elsewhere. Other changes that he introduced, based on his work in Birmingham, were the separation of sludge
Sludge
Sludge refers to the residual, semi-solid material left from industrial wastewater, or sewage treatment processes. It can also refer to the settled suspension obtained from conventional drinking water treatment, and numerous other industrial processes...

 digestion, the extraction of methane
Methane
Methane is a chemical compound with the chemical formula . It is the simplest alkane, the principal component of natural gas, and probably the most abundant organic compound on earth. The relative abundance of methane makes it an attractive fuel...

 from sewage for use in power generation and the introduction of flocculation
Flocculation
Flocculation, in the field of chemistry, is a process wherein colloids come out of suspension in the form of floc or flakes by the addition of a clarifying agent. The action differs from precipitation in that, prior to flocculation, colloids are merely suspended in a liquid and not actually...

 prior to the percolating filter. He drew up plans for sanitation works in the district of Aberdeen
Aberdeen
Aberdeen is Scotland's third most populous city, one of Scotland's 32 local government council areas and the United Kingdom's 25th most populous city, with an official population estimate of ....

 which included a pumping station at Denmill, reservoir at the Hill of Ord and water supply to the district of Culter
Culter
Culter may refer to:* Culter, South Lanarkshire, Scotland, United Kingdom* Culter , a genus of cyprinid fish* Culter F.C., a junior football club from the village of Peterculter, Aberdeen, Scotland* Culter School, a primary school in Aberdeen...

. These plans are now held by the National Archives of Scotland
National Archives of Scotland
Based in Edinburgh, the National Archives of Scotland are the national archives of Scotland. The NAS claims to have one of the most varied collection of archives in Europe...

.

Watson became General Manager of Birmingham Agricultural College by 1920 where he undertook investigations into tuberculosis in cattle. By 1920 he was also a member of the Institution of Civil Engineers
Institution of Civil Engineers
Founded on 2 January 1818, the Institution of Civil Engineers is an independent professional association, based in central London, representing civil engineering. Like its early membership, the majority of its current members are British engineers, but it also has members in more than 150...

 (ICE) and a fellow of the Royal Sanitary Institute. Watson was elected president of the ICE for the November 1935 to November 1936 session. In his retirement he joined his son, David Mowat Watson
David Mowat Watson
David Mowat Watson was a British civil engineer.David was born in Aberdeen in 1891. His father was John Duncan Watson, a civil engineer regarded as a pioneer in the development of sewage treatment...

, who was also a member of the ICE, in his private engineering consultancy practice. Watson died in Birmingham in 1946. His son, David Watson followed in his footsteps in November 1954 by also becoming president of the ICE.
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