# Solids Concentration

## Definition - What does Solids Concentration mean?

Solids Concentration is the volume of solids in a liquid divided by the total volume of the solution. It is one of the most important parameters in solid/liquid separation. Solids concentration has a major influence on the numerical values of some of the other constituent terms required for equipment modelling. For example, the resistance of a fluid to flow during filtration increases with increase in solids concentration.

## Petropedia explains Solids Concentration

When the density of slurry in a hydrocarbon solution needs to be determined, the concentration of solids by weight in the slurry should be known. Thus, the solid concentration in a solution is an important factor. The density of the slurry is inversely proportional to the solids concentration. The formula for calculating slurry density is as follows:

*ρ _{m} = 100 / [c_{w }/ ρ_{s} + [100 - c_{w}] / ρ_{l}] *

*Where:*

*ρ _{m} = density of slurry (lb/ft^{3}, kg/m^{3})*

*c _{w }= concentration of solids by weight in the slurry (%)*

*ρ _{s} = density of the solids (lb/ft^{3}, kg/m^{3})*

*ρ*

_{l}= density of liquid without solids (lb/ft^{3}, kg/m^{3})