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5 marksWater and Waste Management

CSEC Human and Social Biology · January 2009 · Paper 2 · Question 10(b)

At a sewage treatment facility, foul wastewater enters the plant and clear treated effluent is discharged into a river.

Explain the biological and physical processes involved in transforming wastewater into clean, safe effluent.

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Other parts of this question

  1. 10(a)Identify the two main constituents of sewage.[2 marks]
  2. 10(c)(i)Identify one source of sulphur dioxide responsible for reducing smog.[1 mark]
  3. 10(c)(ii)Describe one harmful effect of reducing smog and one harmful effect of photochemical smog on human health.[2 marks]

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