Thickening: Oper. Conds Tab

Variable Definitions, Ranges and Default Values

The following table shows a brief description of the variables appearing in this tab. The table also displays their default values and their generally acceptable range:

Variable	Default Value	Range

○ Removal %	0.0	0 – 100
◙ Specific Feed Loading Rate (m³/m²-day)	7.2	Positive
○ Sludge Volume Index (mL/g) (W&K model)	120	Positive
○ Sludge Volume Index (mL/g) (D&R model)	120	Positive
○ Parameter Vo (m/h)	7.50	Positive
○ Parameter k (mL/g)	0.74	Positive
○ Particulate Concentration in Sludge (g/liter)	30.0	Positive
● Detention Time (h)	3.0	Positive
● Solids Loading (kg/m²-day)	0.0	Positive
○ Liquid Viscosity (cP) The viscosity of the feed.	1.0	Positive
○ Power Type Indicates the power type that is used by the operation. Click on the list box to bring up a list of available power types in order to select one.	<Std Power>	Any Power Type
● Power (kW) The total power consumed for the operation (per cycle).	0.0	Positive

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

Specification Choices / Comments

The following list describes the available specification choices in this tab; for more details on how these are implemented, see Thickening: Modeling Calculations.

•Detention Time...

The Detention Time is output when the user specifies the tank depth.

•Surface Area Estimation Options...

In Design Mode of calculation, the surface area of the basin(s) can be estimated based either on the Specific Loading Rate or a Solids Settling Flux model.