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3.- Videos.

Sedimentation.

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Source : Eawag - EPFL - ( Switzerland ).

https://youtu.be/9-pe5UkGeBY

Chemical disinfection.

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Source : Eawag - EPFL  ( Switzerland ).

https://youtu.be/bGzg22ivJwE

Water treatment.

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Source : Eawag - EPFL - ICRC ( Switzerland ). 

https://youtu.be/lAE7YKK0TkA

Chlorine measuring principle.

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Source : EH - Endress Hauser -  ( Switzerland ).

https://youtu.be/dxkp-VnJ1FU

Water disinfection methods.

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Source : Grundfos - ( Denmark ).

https://youtu.be/9p_ohx0wb00

Chlorination jar test.

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Source : MSF.

https://youtu.be/ekrfN0xKKmg

Flocculation jar test.

Download

Source : MSF.

https://youtu.be/cw_W80OS3jw

Measuring free residual chlorine.

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Source : MSF.

https://youtu.be/k2_U6BJ_s2k 

Measuring pH.

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Source : MSF.

https://youtu.be/75V4s31pHWg

Pool tester.

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Source : MSF.

https://youtu.be/S63Q29PCfyg

Test of residual aluminium.

Download

Source : MSF.

https://youtu.be/GXG6SDIMs-A

Pooltester vs. Digital Photometer for measuring chlorine.

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Source : Oxfam.

https://youtu.be/9KFcgV_Jumc

Chlorometer - digital.

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Source : UNHCR - WASH.

https://youtu.be/5QSCIxQomkg

Chlorometer - manual.

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Source : UNHCR - WASH.

https://youtu.be/EEfmptdx2N0

Measuring concentrations of chemicals in water.

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Source : WEDC - ( UK ).

https://youtu.be/sF45_sYve7s

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