1 / 16

Web-based Class Project on Geoenvironmental Remediation

Explore the web-based class project on soil vapor extraction (SVE) as an in-situ remediation technique for volatile contaminants in vadose zone soils. Learn about design, operation, advantages, and limitations of SVE. Find detailed technical information.

dberg
Download Presentation

Web-based Class Project on Geoenvironmental Remediation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. SOIL VAPOR EXTRACTION Web-based Class Projecton Geoenvironmental Remediation Prepared by: Report prepared as part of course CEE 549: Geoenvironmental Engineering Winter 2013 Semester Instructor: Professor Dimitrios Zekkos Department of Civil and Environmental Engineering University of Michigan Elaine Wild Adam Lobbestael With the Support of:

  2. INTRODUCTION • Remediation technique for treating contaminated soils within the vadose zone • In-situ remediation technique • Commonly used to remove volatile compounds • Petroleum • Chlorinated Products

  3. CONTAMINANT & SITE SUITABILITY • VVOCs, VOCs, and SVOCs • Low boiling point • High vapor pressure • Increase volatility of substance, Increase the ease as which SVE removes the contaminant • Effectively removes: • Petroleum (benzene, toluene, and xylenes) • Chlorinated Products (tetrachloroethene and perchloroethylene) deq.mt.gov www.arb.ca.gov www.epa.gov

  4. CONTAMINANT & SITE SUITABILITY • Soil Composition • Fine to medium sands • Permeability • High permeability (>10-6) • Groundwater Conditions • Unsaturated Zone • GW table > 10 ft bgs

  5. PREDOMINANT PROCESSES • Volatization • Dominant process of SVE • High vapor pressure • Advection • Transport of a substance through a medium • Negative pressure gradient induced by wells (USACE, 2002)

  6. PREDOMINANT PROCESSES • Diffusion • Spreading of a substance through medium • Movement due to concentration gradient • Desorption • Process where a substance is removed from a surface to the air • Movement due to a concentration gradient (USACE, 2002)

  7. DESIGN & OPERATION - Determining Applicability - (USACE, 2002)

  8. DESIGN & OPERATION - Determining Applicability - • Vapor Flow Rate • Contaminant Concentration • Location/Setting of Contaminant (Johnson et al, 1990)

  9. DESIGN & OPERATION - Pilot Scale Testing - (USACE, 2002)

  10. DESIGN & OPERATION - System Design -

  11. DESIGN & OPERATION - System Design -

  12. DESIGN & OPERATION - System Design - • Thermal Oxidation • Catalytic Oxidation • Condensation • Carbon Absorption • Resins Absorption • Biofiltration • Internal Combustion Engine • Flares • Diffuser Stacks http://us.ctp-airpollutioncontrol.com

  13. DESIGN & OPERATION - Operation & Monitoring - • Vapor Flow Rates • Pressure Readings • Vapor Concentrations and Compositions • Temperature • Water Table Levels serc.carleton.edu

  14. DESIGN & OPERATION - Operation & Monitoring - • Cost Range: $0.35/lb to $220/lb • Duration: Months to Years serc.carleton.edu

  15. ADVANTAGES & DISADVANTAGES • Advantages: • Ease of construction/readily available materials • Cost effective and relatively quick • Amenable to numerical modeling • Disadvantages: • Limited to high permeability soils • Limited to vadose zone • Ex situ applications have high exposure to contaminant

  16. More detailed technical information on this project can be found at: http://www.geoengineer.org/education/web-based-class-projects/geoenvironmental-remediation-technologies (www.rib-software.com) Department of Civil and Environmental Engineering www.rib-software.com

More Related