Symbol
Explanation
Dimension
Unit,
See
for example
page
TAL
alkalinity
eqv · L- 3
eqv/m 3
49
TOC
total organic carbon
M· L- 3
g0z/m 3
TOD
total oxygen demand M· L- 3
g0z/m 3
46
u
interface velocity
L-1 1
mm/d
189
v
volume
L3
m 3 ,l
VTOT
total volume
L3
m3
129
vs
volatile solids
M
kgVS
vss
volatile suspended
M
kgVSS
solids
w
effect
M-L 2 r 3 watt or kg· m 2 /s 3
326
X
suspended solids
M-L- 3
kg/m 3
37
concentration
X
mean value
XB
biomass (or sludge)
M-L- 3
kg SS(B)/m 3 ,
63
concentration
kgVSS/m 3 ,
kg COD(B)/m 3
XB,A
concentration of auto- M-L- 3
kg COD(B)/m 3
121
trophic (nitrifying)
biomass or sludge
XB,H
concentration of
M-L- 3
kg COD(B)/m 3
121
heterotrophic biomass
or sludge
XB,M
biomass or sludge
M-L- 3
kgSS(B)/m 3
105
mass of methane
producers
XB,S
biomass or sludge
M-L- 3
kgSS(B)/m 3
105
mass of acid producing bacteria
367