# Treatability Constant Calculator

Posted by Dinesh onUse the simple treatability constant calculation tool to calculate or predict performance of trickling filters packed with plastic media. Due to the predictable properties of plastic media, empirical relationships are available to predict performance of trickling filters packed with plastic media. However, the treatability constant must first be adjusted for both the temperature of the wastewater and the depth of the actual filter. *Adjustment for temperature* - The treatability constant is first adjusted from the given standard at 20°C (68°F) to the actual wastewater temperature using `k`

._{30/20} = k_{20/20} * ?^{T-20}

## Treatability Constant Calculation

### Formula:

k_{30/20} = k_{20/20} × ?^{T-20}

- k
_{30/20}= treatability constant at 30°C (86°F) and 20 ft (6.1 m) filter depth - k
_{20/20}= treatability constant at 20°C (68°F) and 20 ft (6.1 m) filter depth (as example values) - ? = temperature activity coefficient (assume 1.035)
- T = wastewater temperature

Note: The actual temperature, °C and depth, ft (m) are used when this formula is applied in practice. The numbers given here are for illustrative purposes only.