The major aim of wastewater treatment is to remove as much of the suspended solids as possible before the remaining water, called effluent, is discharged back to the environment.,
What is screening and straining?
Coagulation. After the coagulant has been added to the water, it must be mixed at varying speeds over a period of time to allow the flocs to form (this part of the process is known as flocculation). Sedimentation and clarification. Once the flocs have formed, the water is passed over a sedimentation basin.
What is removed when sewage is screened?
Screening and straining devices trap trash and coarse debris using smaller apertures such as grates or screens.Jan 18, 2022
What is WTP and STP?
As sewage enters a plant for treatment, it flows through a screen, which removes large floating objects such as rags and sticks that might clog pipes or damage equipment. After sewage has been screened, it passes into a grit chamber, where cinders, sand, and small stones settle to the bottom.
What are the 5 stages of water treatment?
Environmental Solutions, Sewage Treatment Plants (STP), Efflaent Treatment Plant(ETP) & Water Treatment Plant(WTP) | NT AGNI.
What are the 4 stages of sewage treatment?
These include: (1) Collection ; (2) Screening and Straining ; (3) Chemical Addition ; (4) Coagulation and Flocculation ; (5) Sedimentation and Clarification ; (6) Filtration ; (7) Disinfection ; (8) Storage ; (9) and finally Distribution. Let's examine these steps in more detail.
What are the 3 stages of wastewater treatment?
There are three main stages of the wastewater treatment process, aptly known as primary, secondary and tertiary water treatment.Dec 6, 2018
What do we call sewage water after it has been treated?
Wastewater still contains organic solid matter – otherwise known as human waste. We separate the waste from the water by putting it into large settlement tanks, where solids sink to the bottom. We call the settled solids 'sludge'.