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water treatment
4

water treatment

water treatment

(OP)
How much 12.5% sodium hypochlorite solution would it take to make 300gpm of water a 40ppm water/chlorine solution

RE: water treatment

2
It looks like 4.65 gal/hour.

RE: water treatment

When calculating dosages for sodium hypo, especially in the process design you may want to take into account possible degradation of the hypochlorite over time.

RE: water treatment

I agree with paulrau, but would include that the chlorine demand of the water should be considered if you required 40ppm of free chlorine for disinfection purposes.

RE: water treatment

I am a little slow on the uptake, but if the flow rate is 300 gpm then that would be 18000 gal/hour.  That would seem to come out to 0.018 gal = 1/1,000,000 of 18,000 gal.  If the desire dose was 40 ppm, then that would require 40 x 0.018 gal/hr or 0.72 gal / hr cl2.  If the sodium hypochlorite is a 12.5% solution, then the 0.72 gal/hr chlorine would have to be divided by the 0.125 solution leaving a feed rate for the sodium hypochlorite of 5.76 gal/hr.  What am I missing here?  Are you factoring in the s.g. of sodium hypochlorite?  If so I find that somewhat curious as I was always told that because commerical strength hypo is based on 1% figured at one pound of chlorine per 10 gallons of water which would balance out the s.g.  Is this incorrect?

RE: water treatment

Correction:

Sodium Hypochlorite Specification For 12.5 Trade Percent Available Chlorine: Delivered Grams per Liter: >120 G/L

120 G/L available chlorine =  

120 G/L x 3.785 liters/gallon x 2.205 pounds/1000grams = 1 pound/gallon available Cl2    

Therefore, one gallon of sodium hypochlorite at 120 GPL will equal one pound of chlorine and it has the equivalent oxidizing power.

40 mg/l Cl2 /120 = 0.33 lbs/1000 gallon

0.33 lbs/1000 gallon * 18000 gallons/her = 6.0 lbs/hr Cl2

6.0 lbs/hr Cl2 *1.0 gallon sodium Hypochlorite/1.0 lb Cl2 =

6 gallons/hr of 12.5 Trade Percent Sodium Hypochlorite

http://www.odysseymanufacturing.com/product_spec.htm




 

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