What does CT stand for in water treatment?

CT = Concentration x Time. CT is the concentration of chlorine in your water times the time the water is in contact with that chlorine.

What is CT value in chlorination?

CT Values are an important part of calculating disinfectant dosage for the chlorination of drinking water. A CT value is the product of the concentration of a disinfectant (e.g. free chlorine) and the contact time with the water being disinfected. It is typically expressed in units of mg-min/L.

What is the formula for contact time?

Divide 1,500 gallons by the peak hourly flow of 15 gallons per minute to get 100 minutes of time available. Step 2: Your contact time is 100 minutes x 1.5 mg/l. This is equal to 150 min. mg/l of available contact time.

What is the CT concept?

The CT concept of ozone is expressed as a product of the average concentration of ozone (residual) multiplied by the time over which an organism is exposed to the residual. This product is referred to as CT and typically has the units mg-min/liter.

How do you size a chlorination system?

The formula is simple: multiply the flow of the water (in Gallons Per Minute “GPM”) times the Applied Dosage (in Parts Per Million “PPM”) and them multiply this by 1440 (the number of minutes in one 24 hour period).

How is CT log inactivation calculated?

  1. Flowing full.
  2. Conversion Factors:
  3. Measured at Peak Flow:
  4. Step 4: Calculate virus log inactivation.
  5. The CT required for 4 log inactivation of viruses (designated as CT99.
  6. Example Log Inactivation Calculation.
  7. V= π × d × r2, Cylindrical Basin Volume Equation.
  8. TDT = V / Q.

How is CT calculated?

Calculate the CT ratio. The CT ratio is the inverse of the voltage ratio. In this example, the voltage ratio is 1:5, so the CT ratio is 5:1. This means the current level is stepped down 5 times where, if the primary current is 200 amps, the CT output is 40 amps.

What is T10 in water treatment?

T10 refers to the effective contact time, which is the time it takes 10% of the volume of a unit to pass through that unit and T is referred to as theoretical detection time.

What is 4 log treatment of drinking water?

Compliance monitoring to ensure that treatment technology installed to treat drinking water reliably achieves 99.99 percent (4-log) inactivation or removal of viruses.