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ECW542

Wastewater Engineering Lecturer:

Tower 1/ Aras

, Room

Ext. Sewage Treatment DA/RH


Learning Outcome At the end of Week 6 students should be able to - describe primary treatment - apply knowledge related to primary treatment systems


GREASE REMOVAL

Grease creates problems at the clarifier and is carried over in the final effluent.

Oil & grease will be removed from the top surface of the chamber.

Oil concentration normally 100 mg/I in sewage.


OTHER PRELIMINARY TREATMENT OPERATIONS

A ) Pre – Aeration. Prior to primary sedimentation. Improve treatability. Provide grease separation, odor, control, grit removal and flocculation.


OTHER PRELIMINARY TREATMENT OPERATIONS

Promote uniform distribution of suspended and floating solids. Increase BOD removals. Short period.


B ) Flocculation. To form flocs or aggregate.

Increase the removal of BOD and SS. For wastewater containing industrial wastes.

By mechanical or air agitation.


THANK YOU


ECW542-wk06-L16  

ECW542 Sewage Treatment Lecturer: DA/RH At the end of Week 6 students should be able to - describe primary treatment - apply knowledge relat...

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