Application of air stripping to powdered activated carbon adsorption of geosmin and 2-methylisoborneol

Title
Application of air stripping to powdered activated carbon adsorption of geosmin and 2-methylisoborneol
Author(s)
정진영박상민[박상민]허태영[허태영]박노백[박노백]나광주[나광주]전항배[전항배]
Keywords
MIB; NOM; WATER; TASTE; REMOVAL; DESIGN
Issue Date
201008
Publisher
IWA PUBLISHING
Citation
JOURNAL OF WATER SUPPLY RESEARCH AND TECHNOLOGY-AQUA, v.59, no.8, pp.492 - 500
Abstract
Removal of odor-causing compounds (OCCs) including geosmin and 2-methylisoborneol (2-MIB), well known to cause the musty and earthy odor in drinking water, was investigated using powdered activated carbon (PAC) adsorption and air stripping processes. Removal by air stripping was mainly affected by aeration flow rates with volumetric mass-transfer rates of 0.002-0.005 min(-1). Aeration also proved efficient for marginal removal of geosmin and 2-MIB in conjunction with PAC adsorption. Removal efficiencies increased depending on both PAC dose and aeration time in the aerated PAC contactor. PAC adsorption with aeration reduced the required PAC dose and contact time for removal of these compounds, compared with PAC adsorption alone. Removal efficiency of geosmin above 93% was improved by simultaneous PAC adsorption and air stripping under the same conditions. 2-MIB was relatively less amenable to removal and removal efficiency was about 58% by PAC adsorption at a dose of 15mg l(-1), 14% by air stripping at aeration flow rate of 15 l min(-1) with 60 min aeration and 74% by simultaneous PAC adsorption and air stripping, respectively. Aeration flow rate, contact time and PAC dose were the critical factors in PAC adsorption with aeration for OCC removal and optimum conditions are suggested.
URI
http://hdl.handle.net/YU.REPOSITORY/23812http://dx.doi.org/10.2166/aqua.2010.101
ISSN
0003-7214
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공과대학 > 환경공학과 > Articles
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