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During a sanitary inspection of a rapid sand filtration plant, slowing of the filtration rate was observed owing to loss of hea Which method will you suggest to give head to water in such a situation?

waelhammad
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2022-12-04
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During a sanitary inspection of a rapid sand filtration plant, slowing of the filtration rate was observed owing to loss of hea Which method will you suggest to give head to water in such a situation?

  1. Addition of alum
  2. Scraping the top layer
  3. Increasing duration of storage
  4. Back washing of sand bed
  5. The addition of lime or soda ash
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waelhammad
2022-12-04
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D. Back washing of sand bed

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