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DOI: https://doi.org/10.4491/eer.2020.182
Investigation of flow dynamic characteristics of inverse fluidized bed biofilm reactor for degrading pharmaceutical based biomedical wastewater
Sabarunisha Begum S1, Mohamed Yacin Sikkandar2, Prakash NB3, Mohsen Bakouri2, Ahmed Bakhit Alanazi4 , and Nasser Mohammed Saad Alkhatlan4
1Department of Chemical Engineering, Sethu Institute of Technology, Virudhunagar, India
2Department of Medical Equipment Technology, College of Applied Medical Sciences, Majmaah University, Al Majmaah 11952, Saudi Arabia
3Department of Electrical and Electronics Engineering, National Engineering College, Kovilpatti, India
4Ministry of Health, Saudi Arabia
Corresponding Author: Mohamed Yacin Sikkandar ,Tel: +966–537398290 , Email: m.sikkandar@mu.edu.sa
Received: April 17, 2020;  Accepted: November 1, 2020.
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The paper investigates the flow dynamic behaviour of inverse fluidized bed biofilm reactor (IFBBR) for the treatment of pharmaceutical based biomedical wastewater. The residence time distribution (RTD) study has been employed as a tool to investigate the flow dynamic behaviour of wastewater within the reactor. The biofilm reactor is operated using Pseudomonas fluorescens for various ratios of settled bed volume to reactor working volume (Vb/Vr) with different superficial air velocities and examined their impact on flow dynamics. The outcomes of this study demonstrate the presence of dead volume and short circuiting in the reactor were reduced for the optimized (Vb/Vr) ratio of 0.20 and optimum superficial air velocity (Ug)m of 0.220 m/s. The potential of IFBBR was experimentally validated by analysing the chemical oxygen demand (COD) removal efficiency, total dissolved solids (TDS) and total suspended solids (TSS) emanating from the wastewater. Findings of this study reveals that maximum COD reduction of about 92% was achieved when the reactor was operated with (Vb/Vr)m of 0.20 with superficial air velocity, Ugm of 0.220 m/s showing the optimal operating parameters for IFBBR which has good mixing and less back mixing condition inside the reactor.
Keywords: Chemical oxygen demand | Flow dynamics | Inverse fluidization | Liquid biomedical wastewater | Residence time distribution | Superficial velocity
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