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Submitted: 22 Jan 2022
Revision: 16 Apr 2022
Accepted: 19 Apr 2022
ePublished: 29 Jun 2022
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Avicenna J Environ Health Eng. 2022;9: 45-53.
doi: 10.34172/ajehe.2022.06

Scopus ID: 85135587889
  Abstract View: 118
  PDF Download: 63

Original Article

Enhanced Biodegradation of Formaldehyde Using Aerobic Sequencing Batch Rotating Bed Bioreactor With and Without Stimulation by Hydrogen Peroxide

Ahmadreza Yazdanbakhsh 1,2* ORCID logo, Mohsen Sadani 2 ORCID logo, Mohammad Golaki 2 ORCID logo

1 Workplace Health Promotion Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
2 Department of Environmental Health Engineering, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
*Corresponding Author: Corresponding author: Ahmadreza Yazdanbakhsh, Email: , Email: yazdanbakhsh@sbmu.ac.ir

Abstract

The removal of formaldehyde as a toxic substance from aqueous solutions is of particular importance. In this research, a sequencing batch rotating-bed bioreactor (SBRB) was used on a laboratory scale for biodegradation of formaldehyde from synthetic wastewater. The reactor was made of plexiglas with a cylindrical shape. Kaldnes media were placed in a rotating cylindrical basket in the reactor. The effects of formaldehyde concentration (500–1500 mg/L), hydraulic retention time (HRT) (8, 15, 24 hours), and injection of hydrogen peroxide (0.1-0.5 mM) on the performance of the reactor were investigated. The results showed that in the SBRB, at an HRT of 24 hours and an inlet formaldehyde concentration of 1000 mg/L, the removal efficiencies of formaldehyde and chemical oxygen demand (COD) were 99.2% and 92%, respectively, while without rotating the bed, the removal efficiency of formaldehyde and COD was found to be 95% and 83%, respectively. By adding hydrogen peroxide at a concentration of 0.3 mM and operation of the SBRB with an HRT of 8 hours and an inlet formaldehyde concentration of 1000 mg/L, an improvement in the removal efficiency of formaldehyde and COD (4% and 22%, respectively) was observed. Accordingly, SBRB stimulation with hydrogen peroxide could be considered as a high-performance process for the removal of formaldehyde and corresponding COD at a short HRT.
Keywords: Formaldehyde, Rotating bed, Bioreactor, Wastewater, Peroxidase,

Please cite this article as follows: Yazdanbakhsh A, Sadani M, Golaki M. Enhanced biodegradation of formaldehyde using aerobic sequencing batch rotating bed bioreactor with and without stimulation by hydrogen peroxide. Avicenna J Environ Health Eng. 2022; 9(1):45- 53. doi:10.34172/ajehe.2022.06
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