Sewage

What happens to the sewage at the inlet works?

• 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 is filtered and disinfected.

What is the sewage network?

• The place where water is cleaned before being returned to rivers.

• The pipes that carry sewage (dirty water) from our houses to the sewage treatment plant.

• The place where all our sewage is cleaned.

• The place where water is cleaned before being returned to our taps.

What is a sewage treatment plant?

• The place where water is cleaned, filtered and tested before re-entering the water cycle.

• The place where water is cleaned, filtered and tested before going to our houses.

• The network of pipes that carry sewage (dirty water) from our houses.

• The place where water is bottled for drinking.

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

• Plants

• Animals

• Bacteria

• Fungi

Where is the sludge and solids separated from the liquid?

• Inlet works

• Clarifyers

• Sewage treatment plant

• Bio reactor

Which is the correct order for these three processes of sewage treatment? (disinfection, inlet works and bio reactor)

• 1. inlet works, 2. disinfection 3. bio reactor

• 1. bio reactor, 2. disinfection 3. inlet works

• 1. inlet works, 2. bio reactor 3. disinfection

• 1. disinfection, 2. bio reactor 3. inlet works

The top most layer of sewage composed of materials that float on water such as grease, oil, and fats.

• Scum

• Sludge

• Effluent

Answer explanation

Effluent (middle layer) is the clarified wastewater left over after the scum has floated to the top and the sludge has settled to the bottom.

Which of the following is NOT a type of sewage disposal system?

• Privy

• Deadpool

• Septic Tank

• Sewer Line

Answer explanation

(Deadpool is a Marvel comic character. LOL.) Deadpool occurs when water in a reservoir drops so low that it can't flow downstream from the dam.

A concrete sealed vault with a wooden shelter constructed for the collection of raw sewage.

• Privy

• Septic Tank

• Cesspool

Answer explanation

Cesspool, meanwhile, is a hole in the ground curbed with stones, bricks, concrete hollow blocks, or other materials laid in such a manner as to allow raw contaminated sewage to leach into the soil.

A septic tank has at least how many compartments?

• 1

• 2

• 3

Answer explanation

A septic tank should have two chambers: digestive and leaching.