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Harriette Purchas gravatar image
RedR TSS

Chlorine residuals in long pipelines

This question came through email from Sarah:

There are a few issues that I have been doing some desk research on, that I would also be interested to hear how the UK Water Industry deals with them, before concluding to make recommendations for a project that I am working on in a low income African country.

The issues relate to:

  1. How they maintain chlorine residuals in very long pipelines – for example 80km long (obviously this is also a very hot climate which adds additional problems, but I’d still be interested to know how the UK Industry deal with this)?
  2. Re-algae: a. Whether the UK Water Industry undertakes specific identification of algae to establish any potential toxin problems? b. If they do identify the algae what methods do they use? c. Or if the identification is too complex because of the wide number, so they just focus on ensuring effective treatment? d. If they do treat which methods do they tend to use? (activated carbon, chlorination, sonic system etc.)
  3. What specifications are used for PPE for handling chlorine and cleaning the inside of water tanks / tankers (particularly masks/respirators)?
  4. What specifications do they use for paints for the inside of water tanks? (I have found some specific makes that are approved by DFID, but I was wondering if there is a standard specification that the industry uses)

Thanks for your help in advance!

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KnowledgePointAdmin gravatar image
RedR CCDRR

Chlorine residuals in long pipelines

This question came through email from Sarah:

There are a few issues that I have been doing some desk research on, that I would also be interested to hear how the UK Water Industry deals with them, before concluding to make recommendations for a project that I am working on in a low income African country.

The issues relate to:

  1. How they maintain chlorine residuals in very long pipelines – for example 80km long (obviously this is also a very hot climate which adds additional problems, but I’d still be interested to know how the UK Industry deal with this)?
  2. Re-algae: a. Whether the UK Water Industry undertakes specific identification of algae to establish any potential toxin problems? b. If they do identify the algae what methods do they use? c. Or if the identification is too complex because of the wide number, so they just focus on ensuring effective treatment? d. If they do treat which methods do they tend to use? (activated carbon, chlorination, sonic system etc.)
  3. What specifications are used for PPE for handling chlorine and cleaning the inside of water tanks / tankers (particularly masks/respirators)?
  4. What specifications do they use for paints for the inside of water tanks? (I have found some specific makes that are approved by DFID, but I was wondering if there is a standard specification that the industry uses)

Thanks for your help in advance!