1887

Abstract

The optimal design (variable volume) of continuous stirred tank reactors (CSTR's), in series, performing biological conversion of organic materials, was derived. The optimal design was based on the minimum overall reactor volume required for a certain degree of substrate conversion, and the number of reactors. In this study, it was assumed that cell growth kinetics follows the Contois model with endogenous decay. This unstructured kinetic model has been used by many researchers to describe biodegradation of organic materials, especially in the food industries and industrial wastewater treatment. The optimization problem was formulated as a nonlinear constrained mathematical programming problem, and solved using the Matlab function “”. The effect of operating parameters such as; substrate concentration in the feed to the first reactor, substrate conversion, and number of CSTR's in series for the optimum design was investigated. Using the optimum design is beneficial only at high substrate conversion. The substrate concentration in the feed to the first reactor has little effect on the total required reactor volume. Up to 5 CSTRs in series were used in this study.

Loading

Article metrics loading...

/content/papers/10.5339/qproc.2014.wcee2013.1
2014-07-01
2019-12-10
Loading full text...

Full text loading...

/deliver/fulltext/qproc/2014/3/qproc.2014.wcee2013.1.html?itemId=/content/papers/10.5339/qproc.2014.wcee2013.1&mimeType=html&fmt=ahah

References

  1. Contois DE. Kinetics of bacterial growth: relationship between population density and specific growth rate of continuous cultures. J Gen Microbiol. 1959; 21::4050.
    [Google Scholar]
  2. Abdurahman NH, Rosli YM, Azhari NH, Tam SF. Biomethanation of palm oil mill effluent(POME) by membrane anaerobic system (MAS) using POME as a substrate. PWASET. 2011; 75::419424.
    [Google Scholar]
  3. Alqahtani RT, Nelson MI, Worthy AL. Analysis of a chemostat model with variable yield coefficient: Contois kinetics. ANZIAM J. 2012; 53::C155C171.
    [Google Scholar]
  4. Alqahtani RT, Nelson MI, Worthy AL. A fundamental analysis of continuous flow bioreactor models with recycle around each reactor governed by Contois kinetics. III. Two and three reactor cascades. Chem Eng J. 2012; 183::422432.
    [Google Scholar]
  5. Hu WC, Thayanithy K, Foster CF. A kinetic study of the anaerobic digestion of ice-cream wastewater. Process Biochem. 2002; 37::965971.
    [Google Scholar]
  6. Wall JB, Hill GA. Optimum CFST bioreactor design: experimental study using batch growth parameters for S. cerevesiae producing ethanol. Can J Chem Eng. 1992; 70::148152.
    [Google Scholar]
  7. Hill GA, Robinson CW. Minimum tank volumes for CFST bioreactors in series. Can J Chem Eng. 1989; 67::818824.
    [Google Scholar]
  8. Abu-Reesh IM. Optimal design for CSTRs in series using reversible Michaelis-Menten reactions. Bioprocess Eng. 1996; 15:5:257264.
    [Google Scholar]
  9. Abu-Reesh IM. Optimal design for CSTRs in series performing enzymatic lactose hydrolysis. Bioprocess Eng. 2000; 23::709713.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.5339/qproc.2014.wcee2013.1
Loading
/content/papers/10.5339/qproc.2014.wcee2013.1
Loading

Data & Media loading...

  • Received: 18 January 2014
  • Accepted: 30 April 2014
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error