MLVSS Calculator - Wastewater Treatment Process Control Tool

Calculate MLVSS for activated sludge systems using TSS and VSS% or FSS methods. Free online tool for wastewater treatment operators to optimize F/M ratio, SRT, and biomass control.

MLVSS Calculator

Calculate Mixed Liquor Volatile Suspended Solids (MLVSS) for wastewater treatment processes

Input Parameters

mg/L
%

Results

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0.00 mg/L

Calculation Formula

Using VSS Percentage Method

MLVSS = TSS × (VSS% ÷ 100)
MLVSS = 0.00 × (0.00 ÷ 100)
MLVSS = 0.00 × 0.0000
MLVSS = 0.00 mg/L

What is MLVSS?

Mixed Liquor Volatile Suspended Solids (MLVSS) is a key parameter in wastewater treatment that represents the organic fraction of suspended solids in the aeration tank.

MLVSS is used to determine the amount of active biomass in the system, which is crucial for monitoring and controlling biological treatment processes.

MLVSS can be calculated either by using the VSS percentage of TSS or by subtracting Fixed Suspended Solids (FSS) from Total Suspended Solids (TSS).

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