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CLIP 4199

Sewage treatment

Sewage treatment
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Key Info
  • Sewage treatment
  • Duration: 01:32
  • A description of the sewage treatment process. Bacteria are added to the sewage and oxygen is bubbled through the mixture. The bacteria consume all the food and nutrients in the sewage. The mixture is then left in still tanks where the bacteria settle to form sludge. The remaining water is almost pure and can be returned to a river.
  • Subject:

    Science

       Topic:

    Bio: Microbes

  • Keywords: sewage, diseases, bacteria, biology, biotechnology, geography, microbes, bitesize
Ideas for use in class
  • The clip can be used to demonstrate the use of micro-organisms. The sewage treatment system could contribute to geography as well as biology lessons.
Background details
  • Clip language : English
  • Aspect ratio : 16x9

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