REMOVAL OF AOC IN BIOLOGICAL WATER-TREATMENT PROCESSES - A KINETIC MODELING APPROACH

Authors
Citation
Sl. Zhang et Pm. Huck, REMOVAL OF AOC IN BIOLOGICAL WATER-TREATMENT PROCESSES - A KINETIC MODELING APPROACH, Water research, 30(5), 1996, pp. 1195-1207
Citations number
32
Categorie Soggetti
Engineering, Civil","Environmental Sciences","Water Resources
Journal title
ISSN journal
00431354
Volume
30
Issue
5
Year of publication
1996
Pages
1195 - 1207
Database
ISI
SICI code
0043-1354(1996)30:5<1195:ROAIBW>2.0.ZU;2-M
Abstract
In this paper, a steady-state biofilm model is applied for modeling su bstrate removal by plug-flow bioreactors in biological water treatment . The model is used with assimilable organic carbon (AOC) data from a previous pilot scale study to estimate the essential physical and kine tic parameters required for designing biological water treatment proce sses. The successful fitting of the model to the data demonstrates the applicability of this modeling approach for water treatment and that AOC can be used as at least a surrogate for the overall biodegradable organic matter. The model is used to obtain process insights. It is sh own that there is an approximately linear relationship between substra te removal and influent concentration. For a plug-flow packed bed bior eactor, a quantity designated as the dimensionless empty bed contact t ime, X, is defined. The slope of the linear relationship, representin g the approximate percentage removal of the substrate, is shown to be mainly determined by X. Percentage removal increases convexly with in creasing X, however beyond a certain value of X*, further increases a chieve little improvement. Other dimensionless parameters affect the c onvexity of the curve. Copyright (C) 1996 Published by Elsevier Scienc e Ltd.