Modeling pH Dynamics in the Nutrient Removal Activated Sludge Process

$17.50 plus tax (Refund Policy)

Buy Article:

Abstract:

A comprehensive biological model (MANTIS2) including a pH model was developed on GPS-X simulation platform. Each biological, physical and chemical reaction equation in the model was modified to include the stoichiometric changes in the concentration of inorganic state variables contributing to charge balance. The model was applied to study the pH dynamics in experimental batch reactors performing the biological reactions of nitrification, denitrification and phosphorous release/uptake. The model was able to predict the change in the various parameters of soluble COD, PO4-P and NH3-N during the anaerobic and aerobic conditions of the batch test. The simulated pH profile compared reasonably well with the experimentally measured profile. When the batch reactor conditions were switched from anaerobic to aerobic, nitrification was observed with an increase in the pH. Further analysis of this observation highlighted the importance of the dynamics of CO2 accumulation/stripping and CO2 mass transfer rate in determining the pH in the anaerobic/anoxic/aerobic nutrient removal systems.

Keywords: Modeling; activated sludge; alkalinity; nutrient removal; pH

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/193864710798158111

Publication date: January 1, 2010

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access.
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • ingentaconnect is not responsible for the content or availability of external websites

Tools

Favourites

Share Content

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more