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Question 3 (10 pts) What are the main objectives of preliminary and primary treatment? List three different systems utlized in primary water and wastewater treatment. Question 3 (10 pts) What are the main objectives of preliminary and primary treatment? List three different systems utlized in primary water and wastewater treatment.

Answer 1

The objective of preliminary treatment is the removal of coarse solid and other large material often found in raw waste water. Removal of these material is necessary to enhance the operation and maintenance of subsequent treatment units

The objective of primary treatment is the removal of settleable organic and inorganic material by sedimentation and the removal of materials that will float by skimming

Three system in primary water treatment-----

As the sewage enters to the plants to the treatment, it flows to the screen. Afterwards it passes into A grit chamber. After that these sewage contains minute particals... These particals can be removed in sedimentation tank...