Biotreatment of formaldehyde-contaminated air in a trickle bed bioreactor

Goli, A, Talaiekhozani, A, Eshtiaghi, N, Chisti, Y, Aramesh, R, Aramesh, R and Shamiri, A 2017, 'Biotreatment of formaldehyde-contaminated air in a trickle bed bioreactor', Desalination and Water Treatment, vol. 93, pp. 83-92.


Document type: Journal Article
Collection: Journal Articles

Title Biotreatment of formaldehyde-contaminated air in a trickle bed bioreactor
Author(s) Goli, A
Talaiekhozani, A
Eshtiaghi, N
Chisti, Y
Aramesh, R
Aramesh, R
Shamiri, A
Year 2017
Journal name Desalination and Water Treatment
Volume number 93
Start page 83
End page 92
Total pages 10
Publisher Taylor and Francis
Abstract A biofilm developed on polyurethane packing in a trickle bed bioreactor was used to effectively remove formaldehyde from contaminated air. Formaldehyde removal depended on the retention time of the gas in the bed as well as on the gas-liquid mass transfer coefficient. Both retention time and the mass transfer coefficient depended on the gas flow rate. At 25±1°C and pH 7, a 99% removal of formaldehyde from air with an initial contamination level of 450 mg L -1 was achieved at a hydraulic retention time of 132 s. The degradation rate was likely limited by oxygen mass transfer. The bioreactor could be operated stably over the pH range of 5 to 7 at 25±1°C. Formaldehyde removal in the bioreactor was mathematically modeled to facilitate design and scale up. The model was shown to agree well with the experimental data. Trickle bed bioreactors offer a potentially viable option for cleaning air streams contaminated with formaldehyde.
Subject Chemical Engineering Design
Keyword(s) Biodegradation
Biofilms
Biofilter
Formaldehyde
Trickle bed bioreactor
DOI - identifier 10.5004/dwt.2017.21512
Copyright notice © 2017 Desalination Publications. All rights reserved.
ISSN 1944-3994
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