Screening and Sedimentation | Purification of Water | Part - 02 | Environmental Engineering

Описание: 00:57 Screening
Screening is the first unit operation used at wastewater treatment plants (WWTPs). Screening removes objects such as rags, paper, plastics, and metals to prevent damage and clogging of downstream equipment, piping, and appurtenances. Some modern wastewater treatment plants use both coarse screens and fine screens.

01:35 Plain Sedimentation
Plain sedimentation is the quiescent settling or storage of water, such as would take place in a reservoir, lake, or basin, without the aid of chemicals, preferably for a month or longer, particularly if the source water is a sewage-polluted river water.

03:14 Sedimentation with Coagulation
Sedimentation in potable water treatment generally follows a step of chemical coagulation and flocculation, which allows grouping particles together into flocs of a bigger size. This increases the settling speed of suspended solids and allows settling colloids.
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Purification of Water Part 2 -    • Filtration of Water | Purification of Wate...  
(Filtration of Water)
Purification of Water Part 3 -    • Видео  
(Disinfection of Water)
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