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During the 1880s, chemical engineer William Webster developed a system for the electrolytic purification of sewage (patent application filed on 22 December 1887; US patent awarded on 19 February 1889), [5] trialled in 1888 at the Southern Outfall works [6] [7] which had been built by his father's firm over 20 years earlier.
The treatment of Paris sewage, though, was left to natural devices as 5,000 hectares of land were used to spread the waste out to be naturally purified. [63] Further, the lack of sewage treatment left Parisian sewage pollution to become concentrated downstream in the town of Clichy, effectively forcing residents to pack up and move elsewhere. [63]
The term sewage treatment plant (STP) (or sewage treatment works) is nowadays often replaced with the term wastewater treatment plant (WWTP). [7] [8] Strictly speaking, the latter is a broader term that can also refer to industrial wastewater treatment. The terms water recycling center or water reclamation plants are also in use as synonyms.
A four pole or six pole AC induction motor normally drives the pump. Rather than provide large open passages, some pumps, typically smaller sewage pumps, also macerate any solids within the sewage breaking them down into smaller parts which can more easily pass through the impeller. The interior of a sewage pump station is a very dangerous place.
By 1957, the daily flow pumped to the sewage farm had risen to 1.3 million imperial gallons (5.9 Ml), and ministerial approval was again sought for a replacement pumping station at Manton viaduct. At a similar time, the spindle pumps were replaced by submersible pumps in the collecting tanks, making the 1881 buildings redundant. [21]
Sewerage (or sewage system) is the infrastructure that conveys sewage or surface runoff (stormwater, meltwater, rainwater) using sewers. It encompasses components such as receiving drains , manholes , pumping stations , storm overflows, and screening chambers of the combined sewer or sanitary sewer .
Others use standard gravity drainage for the first phase of collection; sewage flows by means of gravity from each house, as in a standard system. It discharges into a collection sump that might collect sewage from 2-6 houses and is located in a public area. Vacuum technology is based on differential air pressure.
In situations where a downward slope out of a building en route to a treatment system cannot be created, and a special collection sump pit and grinding lift "sewage ejector" pump are needed. By contrast, potable water supply systems are pressurized (up to 50 lbs/sq in or more) and do not require a continuous downward slope in their piping to ...
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