Indices

arith Arithmetic mean value

A Active autotrophs

A Air

Alk Alkaline a Adsorption a Behind reactor a Air ae Aerobic an Anaerobic ap Apparent ax Anoxic b Back b Blower c Cake cat Catalyst cf Cross flow

C Convective

CO2-O CO2-oxygen

CO2-C CO2-carbon

CO2-C/S-C CO2-C/substrate-carbon

CO2-O/S-O CO2-O/substrate-oxygen

CO2-N CO2 needed for neutralisation of H+ formed by NH4-N oxidation

2 Summary d Daily d Decay d Diameter d Dissolved

D Denitrifyers

D Diffusion

DO Dodecan

D+C Diffusion and convection e Effluent e Endogenous eff Effective ex Excess

E Enzyme

ES Enzyme-substrate complex

ET5 Emulgin ET5

Symbol

Explanation f Fouling f Foreign f Free of oxygen g Gear

G Gas

G Generation

H Active heterotrophs

H Hydrolysis i Impuls i Inert

1 Inhibitor i,j Component

L Liquid max Maximal m Membrane m Motor

M After mixure

M Mixing point

ML Mixed liquid

MLSS Mixed liquid suspended solids

N Nitrogen

N secondary materials

NB Nitrobacter

ND dissolved organic nitrogen

NH Dissolved NH3 and NH4

NH4-O2 Oxygen used for NH4 oxydation

NH4-N Nitrogen in ammonia

NS Nitrosomonas

NO Nitrate and nitrite nitrogen

NO2 Nitrite

NO3 Nitrate

NS Nitrosomonas o Influent Standardized to c' = 0 mg L-1

org.P Dissolved organic phosphorous oTS Organic dry matter

02 Oxygen p Permeate p Particulate product po Pore pw Process water

P Phosphorus

Symbol

Explanation

PM

Primary materials

PO4

Orthophosphate

P-P

Dissolved inorganic polyphosphate

rt

Rapid test

R

Reactor

R

Recycle

s

Substrate

spec

Specific

S

Sewage

SC

Substrate-carbon

SO

Substrate-oxygen

SS

Readily biodegradable substrate

St

Standard test

t

Total

th

Theoretical

T

Temperature

v

Related to volume

VOC

Volatile organic carbon

w

Water

XA

Biomass of autotrophs

XH

Biomass of heterotrophs

X

Local coordinate

XC

Bacteria mass-carbon

XO

Bacteria mass-oxygen

XC/XO

Carbon in bacteria mass/oxygen in bacteria mass

XC/SC

Carbon in bacteria mass/carbon in substrate

X/O2

Bacteria mass/oxygen

X/S

Bacteria mass/substrate

z

Local coordinate

0

Influent

Numbers as

Indices

20

Temperature of 20°C

*

Saturation

-

Mean value

20

Applied to 20 °C

20,0

Applied to 20 °C and

c' = 0 mg O2 L-1 dissolved oxygen

Symbol Explanation

0 0

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