Modeling the Dynamics of an Activated Sludge Process Using Yield and Growth Functions

• Deng Qiang

  Department of Mechanical Engineering, Vanderbilt University

• Tanner Robert D.

  Department of Chemical Engineering, Vanderbilt University

Abstract

Transient or dynamic responses often occur in continuous aerobic systems like the activated sludge process when environmental variables change. The system’s response to a dynamic load change has yet to be successfully modeled. In this paper we examine previously collected experimental data of the system’s response to a step change. The real time profile of the growth rate μ and the cell/substrate yield, Y, are studied via parametric manipulation. It was observed that both variables, μ and Y, experience an initial step drop and then a hysteresis response to a new steady-state level, following a sudden step change in the feed flow rate. A modified Monod equation is proposed here to qualitatively model the hysteresis dynamic response of a sudden dilution rate change to an open, continuous microbial growth system.

Journal

• JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

  JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 39 (8), 846-854, 2006

  The Society of Chemical Engineers, Japan

Keywords

• Activated Sludge Process
• Variable Yield
• Dynamic Model
• Fermentation Model

Details

• CRID: 1390001204568923136
• NII Article ID: 10018206171
• NII Book ID: AA00709658
• DOI: 10.1252/jcej.39.846
• ISSN: 18811299
• ISSN: 00219592
• NDL BIB ID: 8018078
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8018078
• Web Site: http://www.jstage.jst.go.jp/article/jcej/39/8/39_8_846/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed