Science Waste Water and Their Impact

Which one is the characteristic of wastewater?

• Does not contain pathogenic micro-organisms

• Safe to health

• Used water from residential, commercial, and industrial areas

• Free from breeding sites for insects, pests and micro organism

During secondary treatment in the aeration tanks, what is working on the sewage waste?

• micro-organisms

• humans

• air titration

• oxidation/reduction

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• irrigation

• aeration

• chlorination

• filtering

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Where does the water from the wastewater treatment plant go?

• Back to homes to be reused

• To the drinking water facility

• To a body of water such as a lake or river

• Soaks back into the ground

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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.

We should not throw cooking oil, fats and paint down the drain because

• they break the pipe

• they harden and clog the pipe

• they flow through the drain freely

• None of these

Sewage in large cities is known as

• Corporation wastewater

• Municipal wastewater

• Rural wastewater

• Urban wastewater

A chemical to disinfect water

• Copper Sulphate

• Distilled Water

• Iron Sulphate

• Chlorine

In what category of waste do paint, household cleaners, medical waste, and solvents belong?

• hazardous
• compost
• municipal solid
• industrial