Carbonaceous organics removal kinetics in an upflow anaerobic sludge blanket (UASB) reactor treating physico-chemically pre-treated textile wastewater

Akshaya Kumar Verma, Puspendu Bhunia, Rajesh Roshan Dash

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

In the present study, physico-chemically pre-treated textile wastewater with a residual chemical oxygen demand (COD) of 780 ± 10 mg L−1 was treated using a lab-scale upflow anaerobic sludge blanket (UASB) reactor at variable HRTs of 30.8 to 8 h, and organic loading rates (OLRs) of 0.62–2.4 kg COD m−3 d−1. Using a new composite coagulant at dosage of 800 mg L−1 for pre-treatment, more than 99% of colour was removed from the feeding influent to UASB reactor. The optimum OLR was found as 0.95 kg COD m−3 d−1 at which maximum COD reduction (98%) was achieved. Modified Stover-Kincannon, Grau second-order, Monod, Haldane and Contois models were applied to evaluate the carbonaceous substrate removal kinetics inside the UASB reactor. The experimental results of this analysis revealed that modified Stover-Kincannon and Grau second-order kinetics were suitable for predicting the performance and to estimate the kinetic coefficients of UASB reactor.

Original languageEnglish
Pages (from-to)1577-1588
Number of pages12
JournalDesalination and Water Treatment
Volume54
Issue number6
DOIs
StatePublished - 8 May 2015
Externally publishedYes

Keywords

  • Composite coagulant
  • Kinetic modelling
  • Textile wastewater
  • UASB reactor

ASJC Scopus subject areas

  • Water Science and Technology
  • Ocean Engineering
  • Pollution

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