Trickling Filter: Equipment Tab

Variable Definitions, Ranges and Default Values

The following table shows the meaning of the variables appearing in this tab, as well as their default values and their generally acceptable range. Note that due to the manner by which the variables are used by the sizing and costing equations, the range of acceptable values may be further reduced.

Variable	Default Value	Range

◙ Filter Diameter The total filter diameter.	0.0 m	Positive
◙ Max Filter Diameter The maximum filter diameter.	60.0 m	Positive
◙ Depth The depth of the filter media	0.0 m	Positive
● Volume The volume of the trickling filter vessel.	0.0 L	Positive
● Cross Sect. Area The cross sectional area of the filter.	0.0 m²	Positive

Symbol Key: ○ User-specified value (always input); ● Calculated value (always output); ◙ Sometimes input, sometimes output

Sizing: Design Mode

In Design Mode, the user specifies the Maximum Filter Diameter and the system computes the Number of Units and the required filter diameter, filter depth, cross sectional area and the volume of the vessel.

Sizing: Rating Mode

In Rating Mode, the user specifies the Number of Units, the filter diameter and depth.

Costing

The equipment purchase cost is based on the total vessel volume. By default it is calculated by the program’s built-in model for an Trickling Filter, with a minimum costing volume of 1000 m³.

For more information on this equipment, see Trickling Filter.

For information on the left-hand side variables and options, see Equipment Data Dialog: Equipment tab.