<p>
<span style="color: rgb(255,0,0)"><span style="background-color: rgb(255,255,0)">A weak soln. ( 1.2 % ) is used. For purifying water</span></span><br />
0.02 to 0 .2 % volumetric is sufficient for Potable Water Treatment</p>
<p>
<strong>SODIUM HYPOCHLORITE</strong></p>
<p>
ACTIVE INGREDIENT:</p>
<p>
Sodium Hypochlorite as Chlorine : 15%</p>
<p>
Sodium Hydroxide : 1%</p>
<p>
INERT INGREDIENTS: : <u>84%</u></p>
<p>
Total 100% </p>
<p>
</p>
<p style="text-align: justify">
General formulation to calculate how much bleach is needed to add to a tank or a pipeline to disinfect it to a given chlorine residual using a given disinfectant. Usually someone wants to know how to meet an AWWA Standard (like C651-92, Disinfection of Water Mains). The equation below should be used to estimate the amount of sodium / Calcium hypochlorite (Chlorine Water is 6.00% sodium hypochlorite) needed to disinfect a given quantity of water to a desired chlorine concentration. </p>
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<p>
req'd residual in ppm<br />
Valume of hypo = volume of water x ( ----------------------------- )<br />
1,000,000 x hypo %</p>
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<p style="text-align: justify">
<span face="">For example , say you had installed a new 5,000 gallon tank and wanted to make sure that you had at least a 100 ppm solution of chlorine in it.</span></p>
<p style="text-align: justify">
<span face="">How much 6.00% Hypochlorite would you need to add ?</span></p>
<ul>
<li style="text-align: justify">
<span face="">(5,000 gal x 100 ppm) / (1,000,000 x .06) = 8.33 gallons</span></li>
</ul>
<p style="text-align: justify">
<span face="">How much 12% Hypochlorite solution would you need ?</span></p>
<ul>
<li style="text-align: justify">
<span face="">(5,000 gal x 100 ppm) / (1,000,000 x .12) = 4.17 gallons </span></li>
</ul>
<p style="text-align: justify">
<span face="">If you use calcium hypochlorite (the white, powder version of chlorine, like HTH pool cleaner), the equation becomes:</span></p>
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<span face=""> req'd residual in PPM<br />
Wgt. of Calcium Hypo (lbs)= gal of water x 8.33 lb / gal m x ( ----------------------------- )<br />
1,000,000 x hypo %</span></p>
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<ul>
<li style="text-align: justify">
This is simply the previous equation multiplied by the conversion factor of 8.33 pounds per gallon of water.</li>
</ul>
<p style="text-align: justify">
Let's assume that we still need to disinfect 5,000 gallons at 100 ppm.</p>
<p style="text-align: justify">
How many pounds of 65% calcium hypochlorite (HTH pool cleaner) are needed?</p>
<ul>
<li style="text-align: justify">
(8.33 lbs/ gal. x 5,000 gal x 100 ppm) / (1,000,000 x .65) = 6.4 pounds</li>
</ul>