We have to add chlorine in water tank.. but we don't know how much have to add and formula..
Hello Eswar, the amount you need depends on a number of factors. Each water has an initial chlorine demand. This has to be determined, usually by using 'jar tests'. Once the initial demand is satisfied, you need to add more chlorine until you achieve the required residual. The attached link takes you to a very useful US EPA document on the subject. Look at 'breakpoint chlorination'. The document also has information about the chlorination methods and the chemistry.
I have attached a second link which provides an alternative overview of the chlorination process for drinking water.
Hope these help,
Regards. John
https://www.epa.ie/pubs/advice/drinkingwater/Disinfection2_web.pdf
https://www.safewater.org/PDFS/resourcesknowthefacts/WhatisChlorination.pdf
if you mean drinking water there are limits and guidelines for Chlorine in the water, according to WHO and EPA, also the most danger part is the chlorination by products and you have to be careful because it may leads to carcinogenic compounds, also the chlorination is not very effective to treat microorganisms (cryptospordium) so you have to be careful and read more about it and the types of pollutants in your water, I attached it here in the first link paper about chlorinantion residual test and you can measure the residual of cl in your tank after treatment.
please check these links:
https://www.google.it/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0ahUKEwif69GG5tbSAhUEQ5AKHVlfAVkQFgg7MAI&url=https%3A%2F%2Fwww.cdc.gov%2Fsafewater%2Fpublications_pages%2Fchlorineresidual.pdf&usg=AFQjCNH_OGhRalGcX4fIGhZzC14dKYX6tg&bvm=bv.149397726,d.ZGg
http://www.pottsmerc.com/article/MP/20130318/LIFE05/130319340
www.who.int/water_sanitation_health/dwq/chloride.pdf
www.eurochlor.org/media/.../01_chlorination_by-products.pdf
kind regards,
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