5.10.1.3 waste water treatment

Question 1

_______ __________ and _________ ________ produce large amounts of waste water that require treatment before being released into the environment.

Answer 1

Urban lifestyles and industrial processes

Question 2

Sewage and agricultural waste water require removal of…

Answer 2

Organic matter and harmful microbes

Question 3

Sewage treatment includes:

Answer 3

-screening and grit removal
-sedimentation to produce sewage sludge and effluent
-anaerobic digestion of sewage sludge
-aerobic biological treatment of effluent

Question 4

What is screening and grit removal?

Answer 4

Screening prevents coarse solids from entering sewage, its a pre-sewage treatment, and grit removal is the removal of silt, sand and grit from water.

Question 5

What is meant by the process ‘sedimentation to produce sewage sludge and effluent’

Answer 5

The removal of particles in the water

Question 6

What is sewage sludge?

Answer 6

Sewage sludge is a mud-like residue resulting from wastewater treatment

Question 7

What is effluent

Answer 7

liquid waste or sewage discharged into a river or the sea.

Question 8

What is ‘anaerobic digestion of sewage sludge’

Answer 8

enhances the stabilization of sewage sludge, reduces pathogens and odor emission, and dry matter of sludge is reduced, which leads to a significant reduction in the final sludge volume

Question 9

What is aerobic biological treatment of effluent

Answer 9

biological wastewater treatment process that takes place in the presence of oxygen.

Question 10

Are you able to obtain potable water via waste water

Answer 10

Yes, The process of using treated wastewater for drinking water is called potable water reuse

Question 11

Order the steps to waste water treatment

Answer 11

1. Screening and grit removal
2. Sedimentation- to produce sewage sludge and effluent
3. Anaerobic digestion of sewage sludge
4. Aerobic biological treatment of effluent