Science Target Conference Systems, Ajman 4th International Environment Conference 2016

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On the Development of Substrate Removal Kinetics for Upflow Anaerobic Sludge Blanket Reactor Treating Physico-Chemically Pre-Treated Textile Wastewater
Akshaya Kumar Verma

Last modified: 2015-09-15

Abstract


Abstract

The present study was conducted to establish the carbonaceous substrate removal kinetics for different lab-scale upflow anaerobic sludge blanket (UASB) reactors treating physico-chemically pre-treated textile wastewater. The reactors were operated with a residual chemical oxygen demand (COD) of 970±10 and 1450±10 mg L−1 at variable HRTs of 1.28 to 0.33 days, and organic loading rates (OLRs) of 0.75 to 2.2 kg COD m−3 d−1. A pre-investigated composite coagulant (MC+ACH) at dosage of 800 mg L−1 was utilized for pre-treatment, more than 99% of color 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. Van der Meer and Heertjes model was employed to establish the methane production inside the UASB reactor during the course of carbonaceous substrate removal. 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.

Keywords: COD; Kinetic modeling; Textile wastewater; UASB reactor