Symbol
Explanation
Dimension
Unit,
See
for example
page
Qs,max
average volume of wa- L3.y-l
m 3 /s
18
ter per second in
maximum month of
the year (infiltration) or
average maximum
second (household +
industry)
Qyear
annual volume of
L3.y-l
m 3 /year
18
water
Qyear,pers
annual wastewater
L3.y-l
m 3 /(person· year)
16
production per person
R
recycle ratio
120
rA,M
removal rate for met- M·L-2.y-l g CI-4/ (m 2 · h)
289
hane per unit area
rA,NH4
removal rate for amM·L-2.y-l g NH4-N/(m 2 ·d)
223
monia per unit area
rA,N03
removal rate for
M·L-2-r-1 g N03-N/(m 2 ·d)
233
nitrate per unit area
rA,S
removal rate per unit M. L-2.y-l kg BOD/(m 2 ·d)
176
area
r£
radius of floes
L
mm
144
rv
volumetric reaction
M· L-3.y-l kg BOD/(m 3 ·d),
115
rate
g COD I (m 3 · h)
rv,CH4
volumetric methane
M· L-3.y-1 g CI-4/(m 3 ·h)
303
production rate
rv,f
volumetric floc
L-3.y-1
number of primary
325
formation rate
particles
incorporated in flocs/(m 3
water· s)
fY,HAc
volumetric acetic acid M· L-3·1 1 kg HAc/(m 3 ·d)
98
uptake rate
363