Activated Sludge Plant Design

The assignment is about designing an activated sludge plant to serve the population of Oldcastle, with a design capacity of 1500 people. The objective is to determine substrate utilization and growth rates for sludge from wastewater samples. This involves using the Monod equation to estimate maximum specific growth rate and Ks values, as well as obtaining maximum BOD utilization rates and Ks value for wastewater samples.

Introduction:
The waste water treatment plant at Oldcastle will built to serve the agglomeration of
Oldcastle municipal co-operation Meath with the design capacity of 1500 population. The
construction of a new wastewater treatment plant to serve the population of the Oldcastle
commenced in upcoming year. The construction of this new plant will be completed in
upcoming next year. The following calculation have been prepare as per requirement of
wastewater plant.
Aim:
To design an activated sludge plant for Oldcastle residencies from the total amount of
population done wastewater flow.
Objective:
Design municipal activated sludge wastewater treatment plant for Oldcastle city through the
preliminary laboratory bacterial growth and utilising wastewater at that area.
To determine the substrate utilisation and growth rates for sludge from the exponential
growth phase of growth.
Plot data to estimate maximum specific growth rate and Ks values from flow cytometry total
counts of bacteria, also obtain maximum BOD utilisation rates and Ks value for wastewater
samples.
Methodology:
r su= k x X x S0
KS + S0
= S0−S
θ
r su=substrate utilizationrate ( ¿ mg
m3 d )
k =maximum specific substrate utilization
S0 =concentration of limiting substrate for growth ( g
m3 )
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X =microorganism concentration ( g
m3 )
KS =half −velocity constan t ( g
m3 )
θ=residence time∈day
S=rest of the substrate concentration∈ ( g
m3 )
Monod equation:
μ=μmax
S
K s +S
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