Variables
Description
What is this formula?
Volumetric Loading Rate (VLR) represents the pollutant mass applied to a treatment reactor per unit volume and time.
When to use it
Use it when designing or evaluating biological reactors, trickling filters, biofilters, anaerobic digesters, packed-bed systems, and industrial wastewater treatment processes.
Example
Data:
Lin = 1800 kg/day
Vr = 3000 m³
Formula:
VLR = Lin / Vr
Substitution:
VLR = 1800 / 3000
Result:
VLR = 0.60 kg/m³·day
Applications
Biological reactor design, anaerobic digestion, trickling filters, biofilm reactors, industrial wastewater treatment, and process optimization.
Note
VLR is an operational loading parameter. The acceptable loading range depends on reactor type, contaminant characteristics, biomass activity, temperature, and treatment objectives. Excessive VLR values may reduce treatment performance and process stability.