About wastewater treatment: A.
Waste water treatment is the phenomenon which is used for theremovalvof contamination from the sewage and thus convert into theeffluent, so that it can be reused directly.Primary Waste Water Treatment: In this stage of treatment, thewastewater is put in the settling tank, so that the heavier solidwaste sinks to the bottom of tank. Whereas, lighter waste floats onthe surface. The settled material are held back whereas the leftover liquid is discharged to more wastewater treatment that is thephase of secondary treatment.Secondary treatment is done on the deeper level. It is doneby1. BioFiltration- In this, sand filters are used so that additionalsediments gets removed.2. Aeration- In the huge aeration tank, air is pumped so that wastewater gets mix with sludge which helps to grow bacteria thatutilise oxygen.Tertiary Treatment- This stage removes almost 99% of the impuritieswhich are present in waste water. This process is quite expensivebecause it needs well trained, equipment which are specialisedwhicj are not readily available.
The alternative way to treat wastewater is to sprinkle thewastewater on the bed of sand so that water filters. Further, thiswater is put into contact with microbes and oxygen which togetherhelps to breakdown the organic matter present in water.
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