Symbol
Explanation
Dimension
Unit,
See
for example
page
YcoD
yield constant per
Ms· Ms- 1
kg COD(B) I kg COD(S)
amount of COD
Ymax
maximum yield
Ms· Ms- 1
g COD(B) I g COD(S)
63
constant
Ymax,A
maximum yield
M·MN- 1
gCOD/gN
197
constant, autotrophic
bacteria or sludge
(nitrifying)
Ymax,H
maximum yield
Mx· Ms- 1
kg COD(X)/ kg COD(S)
115
constant for heterotrophic bacteria or
sludge
Ymax,M
maximum yield
Mx· Ms- 1
kg COD(B) /kg COD(S)
102
constant, methane proclueing bacteria or
sludge
Ymax,N03
maximum yield
Ms· MN- 1
kg COD(B)/kg N03-N
91
constant for denitrification
Ymax,P
maximum yield
Ms· Ms- 1
kg COD(B)/kg COD(S)
98
constant, phosphorus
accumulating bacteria
Ymax,S
maximum yield
Ms· Ms- 1
kg COD(B)/kg COD(S)
102
constant, acid producing bacteria or sludge
in anaerobic processes
YNH4
yield constant for
Ms· MN- 1
kg COD(B)/kg NH!-N
Nitrosomonas
YN03
yield constant per
Ms·MN 1
kg COD(B) /kg N03-N
amount of nitrate
Yobs
observed yield
Mx·Ms- 1
kg COD(X) /kg COD(S)
constant
369