Activated sludge kinetics - Activated Sludge modeling (Jan/04/2010 )

A new approach to Activated Sludge processes: A theory of the lifecycle of bacteria (a full version of the paper may be downloaded in this link)

Abstract of the above paper:

The principal objective of this study was to investigate viability kinetics in aerobic AS (Activated
Sludge). A kinetic model was developed in order to predict viable cells, non-degraded dead cells
and inert VSS (Volatile Suspended Solids) in a reactor – usually conventional models only predict
active biomass and inert VSS. The following processes were considered in the derivation of the
model: the death rate of viable cells, and the hydrolysis rate of dead cells. Equations development
led to a decay coefficient ( – previously considered constant – function of death rate, hydrolysis
rate and solid retention time. Cell growth on soluble COD (Chemical Oxygen Demand) resulting
from lysis/hydrolysis has been introduced in the model. Simulation methods of viability in AS, and
OUR (Oxygen Uptake Rate) tests of AS in batch under starvation were developed in order to
validate the model, and to determine its parameters. The results of this study indicate that the
proposed model is consistent with experimental data. Finally, the approach of this study gives an
explanation for the variability of the decay coefficients obtained previously; and it offers a better
comprehension of viability processes in biological reactors.

Promoting your own paper?
In what magazine was it published?

This is a draft. It is under revision, and a new version will be released soon.

Then why do you post it here if it is a draft? You could have waited and then post the reviewed on or you want someone here to read it and comment it?

I did update the manuscript. Please feel free to download it, your comments are welcome. Thanks.

New manuscript released as of the 8th of January 2010: As there were inconsistencies in prior versions, a model unification approach as been developed to solve the problem.