Wastewater Characterization for Evaluation of
Biological Phosphorus Removal

List of Selected Symbols Used in This Report

fcv	COD to VSS ratio of the volatile suspended solids 1.48 mg COD/mg VSS
F/M	Food to microorganism ratio
kd	Endogenous decay rate (1/day)
Ko	Half-saturation constant for oxygen (mg/L)
Ks	Half-saturation constant (mg/L)
KN	Half-saturation constant for NH4+-N (mg/L)
Nti	Influent total Kjeldahl nitrogen (TKN) (mg-NIL)
Nai	Ammonia and ammonium nitrogen (mg-NIL)
Nui	Unbiodegradable soluble nitrogen (mg-NIL)
Npi	Unbiodegradable particulate nitrogen (mg-NIL)
Noi	Biodegradable organic nitrogen (mg-NIL)
qN	Specific nitrification rate (mg NO2-+ NO3-- N/mg VSS/hour)
qD	Specific denitrification rate (mg NO2-+ NO3--N/mg VSS/hour)
S	Substrate concentration (mg/L)
Sti	Influent total COD (mg/L)
Sbi	Biodegradable COD (mg/L)
Sui	Unbiodegradable COD (mgIL)
Sbsi	Soluble readily biodegradable COD (mg/L)
Sbpi	Particulate slowly biodegradable COD (mg/L)
Susi	Soluble unbiodegradable COD (mg/L)
Supi	Particulate unbiodegradable COD (mg/L)
t	Time
max	Maximum specific growth rate (1/day)
N	Specific growth rate of Nitrosomonas (1/day)
Nmax	Maximum specific growth rate of Nitrosomonas (1/hour)
U	Specific substrate utilization rate (1/day).
X	Mixed liquor volatile suspended solids (mg/L)
Y	Yield coefficient (mg VSS/mg COD)

More information on this topic: Gerry Novotny