During studying
"Guidelines for Safe Recreational-water Environments Final Draft for Consultation
Vol. 2: Swimming Pools, Spas and Similar Recreational-water Environments" from W.H.O website i read highlighted text below:
7) Algicides
Algicides are used to control algal growths, especially in outdoor pools. Algal growth is possible
only if the nutrients phosphate, nitrogen and potassium are present in the pool water. Phosphate
can be removed from the pool water by an optimal flocculation and filtration step during water
treatment. Consequently, such growths are best controlled by ensuring effective
flocculation/filtration, disinfection and good hydraulic design. In such properly managed pools,
the use of algicidal chemicals for the control of algae is not necessary (Gansloser et al., 1999). If
problems persist, however, then proprietary algicides can be used. Quaternary ammonium and
polyoximino compounds and copper salts can be used, but any based on mercury — a toxic and
cumulative heavy metal — should not be added to swimming pools (PWTAG, 1999). All should
be used in strict accordance with the suppliers’ instructions and should be intended for
swimming pool use.
Here is the link:
https://www.who.int/water_sanitation_health/bathing/recreaII-ch5.pdf?ua=1
My question is that we discussed phosphate removal and for this purpose you said the solution for getting rid of phosphate is using phosphate remover but W.H.O is suggesting flocculation and filtration . can flocculation help it?
Thanks
"Guidelines for Safe Recreational-water Environments Final Draft for Consultation
Vol. 2: Swimming Pools, Spas and Similar Recreational-water Environments" from W.H.O website i read highlighted text below:
7) Algicides
Algicides are used to control algal growths, especially in outdoor pools. Algal growth is possible
only if the nutrients phosphate, nitrogen and potassium are present in the pool water. Phosphate
can be removed from the pool water by an optimal flocculation and filtration step during water
treatment. Consequently, such growths are best controlled by ensuring effective
flocculation/filtration, disinfection and good hydraulic design. In such properly managed pools,
the use of algicidal chemicals for the control of algae is not necessary (Gansloser et al., 1999). If
problems persist, however, then proprietary algicides can be used. Quaternary ammonium and
polyoximino compounds and copper salts can be used, but any based on mercury — a toxic and
cumulative heavy metal — should not be added to swimming pools (PWTAG, 1999). All should
be used in strict accordance with the suppliers’ instructions and should be intended for
swimming pool use.
Here is the link:
https://www.who.int/water_sanitation_health/bathing/recreaII-ch5.pdf?ua=1
My question is that we discussed phosphate removal and for this purpose you said the solution for getting rid of phosphate is using phosphate remover but W.H.O is suggesting flocculation and filtration . can flocculation help it?
Thanks