Aeration Tank Design - SI Units

Activated Sludge Waste Water Treatment Calculations - S.I. units 1. Aeration Tank Design Inputs Prim. Effl. Flow Rate, Qo =

Calculations 38,000

m3/d

( Design Based on Volumetric Loading )

Prim. Effl. BOD, So =

150

g/m3

Aeration tank volume, V =

Aeration tank MLSS, X =

2000

g/m3

Check on other design parameters:

Design Vol. Loading, VL =

0.5

11,400

m3

Aeration tank HRT =

7.2

hr

Aeration tank F:M =

0.33

(kg BOD/day/m3)

% volatile MLSS, %Vol =

75%

Equations used for Calculations: V = (So*Qo/1000)/VL HRT = 24*VMG/Qo F:M = (So*Qo)/(%Vol*X*VMG)

(kg BOD/day/kg MLVSS)