Waste Water Story

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Across
  1. 2. wastewater released by homes , industries, hospitals, offices and other users.
  2. 3. a polluting or poisonous substance that makes something impure.
  3. 5. conditions related to public health especially the provision of clean drinking water and adequate sewage disposal.
  4. 8. an underground conduit for carrying off drainage water and waste matter
  5. 9. the introduction of air into a material.
Down
  1. 1. we would see a network of big and small pipes called sewers,
  2. 4. the sludge is transffered to a separate tank where it is decomposed by the anaerobic
  3. 5. - Solid like faeces settle at the bottom and are removed with a scraper .
  4. 6. bacteria- germs that can survive and grow where there is no oxygen.
  5. 7. water- rich in lather , mixed with oil black brown water that goes down the drains