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http://dx.doi.org/10.9713/kcer.2022.60.1.100

Time-Dependent Behavior of Waste-Air Treatment Using Integrated Hybrid System  

Lee, Eun Ju (Department of Chemical Engineering, Daegu University)
Lim, Kwang-Hee (Department of Chemical Engineering, Daegu University)
Publication Information
Korean Chemical Engineering Research / v.60, no.1, 2022 , pp. 100-115 More about this Journal
Abstract
In this study, integrated hybrid system (IHS) composed of two alternatively-operating UV/photocatalytic reactor (AOPR) process and biofilter processes of a biofilter system having two units (i.e., Rup and Rdn) with an improved design (R reactor) and a conventional biofilter (L reactor) was constructed, and its transient behavior was observed to perform the successful treatment of waste air containing ethanol and hydrogen sulfide (H2S). At the IHS-operating stages of HA1, HA2 and HA3T of reversed feed direction, the AOPR process showed not only ethanol-removal efficiencies of 55, 50 and 45%, respectively, but also H2S-removal efficiencies of 70, 60 and 37%, respectively. In particular, a drastic decrease of H2S-removal efficiency at the stage of HA3T was observed due to a doubling of H2S-inlet concentration fed to AOPR from 10 ppmv to 20 ppmv at the stage of HA3T. The order of ethanol-breakthroughs and the order of the magnitude of ethanol-removal efficiencies at the sampling ports of each unit of R reactor at the stages of HA1, HB1, HA2, HB2, and the first half of HA3T, were reversed, respectively, at the stages of the second half of HA3T and HB3T. In case of H2S, R reactor did not show H2S-breakthrough as prominent as the ethanol-breakthrough, but showed the trend similar to the ethanol-breakthrough.
Keywords
Waste-air; Integrated hybrid system; Alternatively-operating UV/photocatalytic reactor; Biofilter system with an improved design; Conventional biofilter. Ethanol; Hydrogen sulfide;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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