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Wastewater Story — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7ScienceWastewater Story1 Mark
MCQ
Which of the following statement is or are incorrect?
  • A
    All the portable toilets are chemical toilets.
  • B
    Septic tanks and composting pits are called on $-$ site sewage facility.
  • C
    Septic tanks are suitable for those places where there is no sewage system.
  • ✓
    The human waste can not be used in a biogas plant for making biogas.
✓

Answer

Correct option: D.
The human waste can not be used in a biogas plant for making biogas.
The biogas produced is used as a fuel.
The human waste or human excreta can be used in a biogas plant along with cow dung for making biogas.
So, in many villages, human excreta from the toilet seats in the homes flows directly into biogas plant through covered drains.

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