Waste Water Treatment

What type of living things remove the organic matter in the sewage?

• Plants

• Animals

• Bacteria

• Fungi

What is the first stage of sewage water treatment?

• The organic matter is eaten by bacteria.

• The sludge and solids are separated from the liquid.

• It is screened to remove unwanted objects like baby wipes etc.

• It goes into the settlement tank for sedimentation

What term describes the solid particles that have settled out during the sedimentation process?

• sediment

• solubility

• settlement

• solidifying

Biogas and fertilisers can be made from...

• Effluent

• Processed sewage sludge

• Sediment

• All of the above

What does aerobic biological treatment remove that anaerobic digestion doesn't?

• Harmful microbes

• Organic matter

• Sludge

• Effluent