Performance and Cost Analysis of Treating a Volatile Organic and Petroleum Hydrocarbon Contaminated Water by ShallowTray [tm] Air Stripping PDF Download
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Author: David F. LaBranche
Publisher:
ISBN:
Category :
Languages : en
Pages : 182
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![Performance and Cost Analysis of Treating a Volatile Organic and Petroleum Hydrocarbon Contaminated Water by ShallowTray [tm] Air Stripping PDF](https://books.google.com/books/content/images/frontcover/YMPANwAACAAJ?fife=w80-h100)
Author: David F. LaBranche
Publisher:
ISBN:
Category :
Languages : en
Pages : 182
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Author: Jim Rawe
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 10
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Author:
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 178
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Author: Chris Dietrich
Publisher:
ISBN:
Category : Sewage
Languages : en
Pages : 80
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Rotary air stripping was researched and developed to remove volatile organic contaminants from groundwater. The Traverse Group, Inc, Ann Arbor MI, was contracted under a joint funding venture by the US Coast Guard and the US Air Force to evaluate feasibility of using rotary air stripping to treat water contaminated with benzene, toluene, xylenes, trichloroethylene, 1,2,dichloroethane, and tetrachloroethylene. A site of groundwater contamination at the US Coast Guard Station, Traverse City MI provided a readily available source of contaminated water for this work. A prototype rotary air stripper (RAS), manufactured specifically for this project, was installed onsite in Traverse City MI. The RAS (consisting of a packed bed 1.7 feet in diameter by 1.2 feet thick) was evaluated over a range of contaminant concentrations (63 to 19,000 ppb), liquid flow rates (50 to 120 gpm), air to water ratios (10:1 to 170:1 vol/vol), and rotor speeds (365 to 875 rpms). The effect of each parameter on removal efficiency was analyzed. Generally, removal efficiencies in excess of 99 percent were achieved for all contaminants (except 1,2-DCE) at an air-to-water ratio and rotor speed of 30:1 vol/vol and 435 rpms, respectively. Keywords: Water treatment, Air stripping, Rotary Air Stripper, Hazardous materials, Rotating packed beds, Acceleration, Mass transfer coefficients, Benzene, Toluene, Xylenes, Fuel contamination, Chlorinated organics.
Author:
Publisher:
ISBN:
Category : Water
Languages : en
Pages : 126
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Author: J. Paul Guyer, P.E., R.A.
Publisher: Guyer Partners
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 24
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Introductory technical guidance for civil, environmental and mechanical engineers and construction managers interested in removal of volatile organic compounds from water streams using air stripping technology. Here is what is discussed: 1. INTRODUCTION 2. DESCRIPTION OF AIR STRIPPERS 3. DESIGN METHODS 4. TREATABILITY 5. COMPARISON OF AIR STRIPPERS 6. AIR POLLUTION CONTROL REQUIREMENTS 7. FLOODING 8. PROCESS CONTROL 9. ECONOMIC EVALUATION 10. REFERENCES.
Author: Gerald E. Fair
Publisher:
ISBN:
Category : Strippers (Chemical technology)
Languages : en
Pages :
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Author: W. Jang
Publisher:
ISBN:
Category : Water
Languages : en
Pages : 51
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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The widespread use of the fuel oxygenate methyl tert-butyl ether (MTBE) has led to the contamination of both surface and groundwater supplies. This study evaluates the treatment of MTBE contaminated drinking water using air stripping and advanced oxidation processes (AOPs) on a pilot scale. The treatment efficiency of the air stripper was evaluated at different air/water ratios ranging from 105:1 to 206:1. Although a treatment efficiency of>99% was achieved for each of the air/water ratio studied, the depth of the packing required to achieve this efficiency increased with decreasing air/water ratio. The adsorption studies conducted on MTBE laden off-gas from the air stripper showed that granular activated carbon (GAC) has a higher adsorptive capacity than the carbonaceous polymeric resin. Experiments conducted at different off-gas relative humidity (RH) of 20%, 30% and 50% reveal that the GAC adsorptive capacity decreased with increasing RH, whereas, the RH did not impact the resin adsorptive capacity. Ozone/hydrogen peroxide (O3/H2O2), ozone/UV (O3/UV), hydrogen peroxide/UV (H2O2/UV), and ozone/hydrogen peroxide/UV (O3/H2O2/UV) are the four AOPs evaluated in this study. An increase in the recycle ratio by 100% resulted in a 5% increase in the treatment efficiency. A treatment effectiveness of 98% was achieved with the use of O3/UV process at an O3 concentration of 5.8 mg/L. The experimental results have shown that the O3/H2O2 process is a slightly more effective (2 to 3% more) treatment process than the O3/UV process at the same O3 concentrations and a H2O2:O3 molar ratio of 1.4:1. Increased treatment efficiencies were observed with increasing H2O2:O3 molar ratios, with the optimum ratio for maximum treatment efficiency being 1:1. Non-detectable levels of MTBE were recorded in the O3/H2O2/UV process, at an O3 dosage of 5.8 mg/L and a H2O2:O3 molar ratio of 1.4:1. The O3/H2O2/UV process was more effective than the O3/H2O2 process at lower H2O2:O3 molar ratios and at ratios above 1:1, the difference in the treatment efficiencies was negligible. Tert-butyl formate, tert-butyl alcohol), methyl acetate and acetone were the major oxidation by-products identified in all the AOPS. The conducted cost analyses revealed that air stripping was the most cost effective treatment process compared to the AOPs.
Author: W. Jang
Publisher: Amer Water Works Assn
ISBN: 9780898675054
Category : Water
Languages : en
Pages : 51
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