Question

1/Why do the following components need to be removed from sewage under current law before it can be discharged on the surface water?

Nitrogen

Algea growth in receiving water Growth of waterborne diseases Turbidity increase of receiving water Oxygen depletion of receiving water
Phosphorus

Algea growth in receiving water Growth of waterborne diseases Turbidity increase of receiving water Oxygen depletion of receiving water
Suspended solids

Algea growth in receiving water Growth of waterborne diseases Turbidity increase of receiving water Oxygen depletion of receiving water
Pathogens

Algea growth in receiving water Growth of waterborne diseases Turbidity increase of receiving water Oxygen depletion of receiving water
2/In the Netherlands, removal of pathogens is only needed if it is discharged on swimming water.

True False
3/What is the goal of the Water framework directive?

Regulating industrial discharges whose activities are potentially polluting, to regulate the discharge of these industries on the sewer system and their effect on the wastewater treatment plant. To protect the environment from the adverse effects of the discharge of urban wastewater. It requires the surface waters' biological community be as close as possible to that what can be expected with no anthropogenic interference.

Answer 1

Nitrogen

Algea growth in receiving water
Phosphorus
Oxygen depletion of receiving water
Suspended solids
Turbidity increase of receiving water
Pathogens
Growth of waterborne diseases

false

Answer 2

Algea growth in receiving water
Phosphorus (wrong)
Oxygen depletion of receiving water
Suspended solids (wrong)


Suspended solids
Turbidity increase of receiving water
Pathogens
Growth of waterborne diseases
true.