Skip to main content

The Effectiveness of Bioaugmentation in Nitrifying Systems Stressed by a Washout Condition and Cold Temperature

Buy Article:

$30.00 plus tax (Refund Policy)


Bioaugmentation consists of adding selected strains of microorganisms with known capabilities to a biological process to improve performance. In this study, laboratory-scale completely stirred tank reactors were bioaugmented with nitrifying bacteria while operated under high-stress conditions for the nitrifiers: a 2-day solids retention time (SRT) at 22 °C or a 5-day SRT at 4 °C. Intensive sampling was carried out to document the effects of the bioaugmentation. To quantitatively interpret the effects of biomass addition on process performance, mathematical modeling was carried out. Experimental and modeling results indicate that the maximum effect of a one-time bioaugmentation depend on the dose and decays as bioaugmented nitrifiers are washed out. Daily maintenance dosing results in long-term good performance, provided that the dose is large enough. For severe stress, almost all of the biomass in the system must be added by bioaugmentation.


Document Type: Research Article


Publication date: 2002-03-01

More about this publication?
  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
  • Editorial Board
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Membership Information
  • Information for Advertisers
  • WEF Bookstore
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect 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