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Comparison of two mathematical models for correlating the organic matter removal efficiency with hydraulic retention time in a hybrid anaerobic baffled reactor treating molasses

Ghaniyari Benis, S ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1007/s00449-011-0577-0
  3. Abstract:
  4. A modelling of the anaerobic digestion process of molasses was conducted in a 70-L multistage anaerobic biofilm reactor or hybrid anaerobic baffled reactor with six compartments at an operating temperature of 26 °C. Five hydraulic retention times (6, 16, 24, 72 and 120 h) were studied at a constant influent COD concentration of 10,000 mg/L. Two different kinetic models (one was based on a dispersion model with first-order kinetics for substrate consumption and the other based on a modification of the Young equation) were evaluated and compared to predict the organic matter removal efficiency or fractional conversion. The first-order kinetic constant obtained with the dispersion model was 0.28 h -1, the Peclet dispersion number being 45, with a mean relative error of 2%. The model based on the Young equation predicted the behaviour of the reactor more accurately showing deviations lower than 10% between the theoretical and experimental values of the fractional conversion, the mean relative error being 0.9% in this case
  5. Keywords:
  6. Anaerobic digestion ; Hybrid anaerobic baffled reactor ; Hydraulic retention time ; Modelling ; Organic matter removal efficiency ; Anaerobic baffled reactor ; Anaerobic digestion process ; BIofilm reactors ; Dispersion models ; Dispersion number ; Experimental values ; First order kinetics ; Fractional conversion ; Kinetic models ; Mean relative error ; Model-based OPC ; Operating temperature ; Organic matter removal ; Young equation ; Biogeochemistry ; Dispersions ; Kinetics ; Mathematical models ; Organic compounds ; Biological materials ; Molasses ; Organic matter ; Anaerobic reactor ; Analytical parameters ; Concentration (parameters) ; Controlled study ; Error ; Intermethod comparison ; Mathematical model ; Microorganism ; Nonhuman ; Prediction ; Priority journal ; Temperature ; Waste water management ; Anaerobiosis ; Bioreactors ; Models, Biological ; Molasses
  7. Source: Bioprocess and Biosystems Engineering ; Volume 35, Issue 3 , 2012 , Pages 389-397 ; 16157591 (ISSN)
  8. URL: http://link.springer.com/article/10.1007%2Fs00449-011-0577-0