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Substrate removal kinetics in an upflow anaerobic sludge blanket reactor decolorising simulated textile wastewater

Authors
Journal
Process Biochemistry
1359-5113
Publisher
Elsevier
Publication Date
Volume
40
Identifiers
DOI: 10.1016/j.procbio.2004.04.014
Keywords
  • Simulated Textile Wastewater
  • Uasb
  • Grau
  • Stover-Kincannon
  • Contois

Abstract

Abstract A simulated wastewater containing sizing agents, azo dyes, salts and other additives was treated using a lab-scale upflow anaerobic sludge blanket (UASB) reactor at different hydraulic retention times (HRT) in order to obtain the substrate removal kinetic of the reactor through decolorization of dyes. COD removal efficiencies decreased from 80 to 29.5% when the HRT decreased from 100 to 6 h. The colour removal efficiencies were between 90 and 95% for HRTs of 100 and 6. Monod, Contois, Grau second order, modified Stover-Kincannon, and first order kinetic models were applied to determine the substrate removal kinetic of UASB reactor. The experimental data obtained from the steady-state conditions showed that Grau second order, modified Stover-Kincannon and Contois substrate removal kinetic models were suitable than the other applied models for predicting the performance of lab-scale UASB reactor treating the azo dyes.

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