Evaluating UV/H2O2 processes for methyl tert-butyl ether and tertiary butyl alcohol removal : Effect of pretreatment options and light sources

In this paper, we evaluate the efficiency of UV/H2O2 process to remove methyl tert-butyl ether (MtBE) and tertiary butyl alcohol (tBA) from a drinking water source. Kinetic models were used to evaluate the removal efficiency of the UV/H2O2 technologies with different pretreatment options and light s...

Full description

Saved in:
Bibliographic Details
Published in:Water research (Oxford) 2008-12, Vol.42 (20), p.5045-5053
Main Authors: KE LI, HOKANSON, David R, CRITTENDEN, John C, TRUSSELL, Rhodes R, MINAKATA, Daisuke
Format: Article
Language:English
Subjects:
Applied sciences
California
Costs and Cost Analysis
Equipment Design
Exact sciences and technology
Hydrogen Peroxide
Kinetics
Light
Methyl Ethers - isolation & purification
Other industrial wastes. Sewage sludge
Pollution
tert-Butyl Alcohol - isolation & purification
Ultraviolet Rays
Wastes
Water Purification - economics
Water Purification - methods
Water Supply - analysis
Water Supply - standards
Water treatment and pollution
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper, we evaluate the efficiency of UV/H2O2 process to remove methyl tert-butyl ether (MtBE) and tertiary butyl alcohol (tBA) from a drinking water source. Kinetic models were used to evaluate the removal efficiency of the UV/H2O2 technologies with different pretreatment options and light sources. Two commercial UV light sources, i.e. low pressure, high intensity lamps and medium pressure, high intensity lamps, were evaluated. The following pretreatment alternatives were evaluated: (1) ion exchange softening with seawater regeneration (NaIX); (2) Pellet Softening; (3) weak acid ion exchange (WAIX); and (4) high pH lime softening followed by reverse osmosis (RO). The presence or absence of a dealkalization step prior to the UV/H2O2 Advanced Oxidation Process (AOP) was also evaluated for each pretreatment possibility. Pretreatment has a significant impact on the performance of UV/H2O2 process. The NaIX with dealkalization was shown to be the most cost effective. The electrical energy per order (EEO) values for MtBE and tBA using low pressure high output UV lamps (LPUV) and 10mg/LH2O2 are 0.77 and 3.0 kWh/kgal-order, or 0.20 and 0.79 kWh/m3-order, respectively. For medium pressure UV high output lamps (MPUV), EEO values for MtBE and tBA are 4.6 and 15 kWh/kgal-order, or 1.2 and 4.0 kWh/m3-order, for the same H2O2 dosage.
ISSN:0043-1354
1879-2448
DOI:10.1016/j.watres.2008.09.017