NA-05 - Cleaning: Solids in Drain and Sewer Systems (Demo)

Transport behaviour of solids

Concentration distribution of the solids

The transport conditions are determined with the help of the two measures of concentration, area- or volume concentration (c) and solids- or transport concentration (also known as volume concentration of suspended solids [ATVDVWKA 110:2001]).

The average area concentration c is defined as the ratio of solid volume VS to the total volume VG of solids transported in the medium V [Macke82].

Equation 1:

The concentration of solids in the wastewater cT is determined by the ratio of the solids volume flow rate QS to the total flow rate QG = QS + Q using Equation 2:

Equation 2:

Q = Liquid flow rate [m³/s]

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