Question

hyphochoride at 12% by mass is used to disinfect water, the flow rate of water is...

hyphochoride at 12% by mass is used to disinfect water, the flow rate of water is 260 m3/h the hyhpochroride dosing pump is at 20l/h

a) How long will it take to disinfect ?

b) how much chorine should be in drinking water after this time ?

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Answer #1

Part a

Hypochloride is used in potable water for disinfection at 12% by mass.

Mass flow rate of water = volumetric flow rate x density

= 260 m3/h x 1000 kg/m3

= 260000 kg/h

Dosing rate of Hypochloride = 260000 kg/h x 0.12

= 31200 kg/h

Volume of Hypochloride required = mass/density

= 31200 kg / (1110kg/m3)

= 28.11 m3

Time will take to disinfect

= 28.11 m3 / (20 L/h x 1m3/1000L)

= 1405.5 hr x 1day/24hr

= 58.56 days or 59 days

Part b

% chlorine in hypochloride = 47.69%

Chlorine in drinking water = 31200 x 0.4769

= 14879.28 kg

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