These calculations are for design estimate and budgeting purposes only, a water sample Cl2 demand test should be performed for design purposes.

NaOCl (Sodium Hypochlorite) & available chlorine

1 gal 12.5% Solution = 1lb cl2 = 125000 ppm

1 gal 10% Solution = .83 lb cl2 = 100000 ppm

1 gal 5% Solution = .42 lb cl2 = 50000 ppm

1 gal .8% Solution = .067 lb cl2 = 8000 ppm

Typical Wastewater Cl2 demand is 6-8 ppm required dose plus what ever desired residual (1-2 ppm) equals Cl2 dose 7.5 ppm

EXAMPLE:

4 MGD ADF (Million Gallons Day Average Daily flow)

Flow rate in gpm x Dose ppm x 1440 / solution strength ppm = feed rate gallons per day

4000000 gpd / 24 hr / 60 min = 2777.77 gpm

6 ppm demand + 1.5 ppm desired residual = 7.5 ppm dose

onsite generated NaOCl = .8% Solution = 8000 ppm

2777.77 x 7.5 x 1440 = 30,000,000

30,000,000 / 8000 ppm = 3750 gpd of .8% Sodium Hypochlorite or 156.25 GPH

Please contact Lutz-JESCO if you need additional assistance with calculations. For more information contact:

  Lutz-JESCO America Corp.
  55 Bermar Park
  Rochester, NY 14624

  Phone: 800-554-2762
  Fax: 585-426-4025
  E-mail: mail@jescoamerica.com

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