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The MBR Book: Principles and Applications of Membrane

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Table 3.2 (continued)<br />

Raw data Calculated data<br />

Design mixed liquor suspended solids MLSS Aerobic tank volume V m 3<br />

(g/m 3 )<br />

Anoxic tank as percentage <strong>of</strong> aerobic V a /V an Food to micro-organisms ratio,<br />

tank size F:M kg BOD/(k g TSS/day)<br />

Maximum specific growth rate � m Oxygen requirement,<br />

(heterotrophic) (g VSS/(g VSS/day)) m 0 kg/day<br />

Saturation coefficient (heterotrophic) K s Required airflow to meet biological<br />

(g/m 3 BOD) requirements, Q A, ,b kg/day<br />

Endogenous decay coefficient k e � factor e �0.084.X<br />

(heterotrophic), g VSS/(g VSS/day)<br />

Yield coefficient (heterotrophic) Y Sludge wastage, Qw m3 g VSS/(g BOD)<br />

/day<br />

Maximum specific growth rate � m,n Sludge waste per unit permeate<br />

(nitrification), (g VSS/(g VSS/day)) (Q w,V m 3 /(m 3 day)<br />

Endogenous decay coefficient<br />

(nitrification) (g VSS/(g VSS/day))<br />

ke,n Airflow per unit permeate<br />

(Rb m3 /(m3 /day))<br />

Yield coefficient (nitrification),<br />

g VSS/(g BOD)<br />

Yn Px<br />

x<br />

X<br />

u<br />

SQ<br />

VX<br />

Q ⎡<br />

⎣⎢ ( S0 �S) �1.42Px �Q�4.33NO �2.83NO<br />

RxOTE 0<br />

A 0.21<br />

r abt<br />

V<br />

u x<br />

Qw<br />

J′ A<br />

net m<br />

QA,b<br />

r J′ A<br />

A net m<br />

x x<br />

132 <strong>The</strong> <strong>MBR</strong> <strong>Book</strong>

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