Scribd
Upload
190 views2 pages

Activated Sludge Waste Water Treatment Calculations - S.I. Units

This document outlines the design calculations for an activated sludge waste water treatment system using SI units. It provides the inputs of a primary effluent flow rate of 38,000 m3/d with a BOD of 150 g/m3. The calculations determine an aeration tank volume of 11,400 m3 based on a design volumetric loading of 0.5 kg BOD/day/m3, with an aeration tank hydraulic retention time of 7.2 hours and food to microorganism ratio of 0.33 kg BOD/day/kg MLVSS.

Uploaded by

nsr2t
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
190 views2 pages

Activated Sludge Waste Water Treatment Calculations - S.I. Units

This document outlines the design calculations for an activated sludge waste water treatment system using SI units. It provides the inputs of a primary effluent flow rate of 38,000 m3/d with a BOD of 150 g/m3. The calculations determine an aeration tank volume of 11,400 m3 based on a design volumetric loading of 0.5 kg BOD/day/m3, with an aeration tank hydraulic retention time of 7.2 hours and food to microorganism ratio of 0.33 kg BOD/day/kg MLVSS.

Uploaded by

nsr2t
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
You are on page 1/ 2

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

Aeration tank HRT =

7.2

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)

m3

hr

You might also like