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.,
The 5 major unit processes include chemical coagulation, flocculation, sedimentation, filtration, and disinfection (described below). There are chemicals added to the water as it enters the various treatment processes.
Primary treatment In a sewage treatment plant, sewage water is first allowed to pass through screens or grit chamber where large solids are removed. This step is followed by aeration/mixing in a tank and then primary sedimentation where suspended solids settle down.
Primary industrial wastewater treatment plant uses screens, grit chamber, and sedimentation tank to get quality water which is free from waste and bad bacteria. Before ejection of the quality water, the sewage passes through many cleaning processes.Mar 24, 2017
The wastewater flows through bar screens to remove trash and debris, then slowly moves through a grit tank where sand and heavy particles settle and are removed.
There are three main stages of the wastewater treatment process, aptly known as primary, secondary and tertiary water treatment.Dec 6, 2018