Question

list three steps through which sewage passas in a waste treatment plant. what contaminants are removed at each step?​

Answer 1

Answer:

There are three main stages of the wastewater treatment process, aptly known as primary, secondary and tertiary water treatment.

Explanation:

Treatment Steps :

Step 1: Screening and Pumping.

Step 2: Grit Removal.

Step 3: Primary Settling.

Step 4: Aeration / Activated Sludge.

Step 5: Secondary Settling.

Step 6: Filtration.

Step 7: Disinfection.

Step 8: Oxygen Uptake.

∆ The predominant contaminants in domestic wastewater are organic substances and sulfide compounds .It should be noted that some of wastewater treatment technologies are associated with heating and evaporation of liquid (chemical oxidation, distillation, and etc).

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