Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)

Korean Geotechnical Society (한국지반공학회)
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Application of Enhanced Soil Vapor Extraction Using PVDs

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  • Shin, Eun-Chul (Dept. of Civil & Environmental System Engineering, University of Incheon) ;
  • Park, Jeong-Jun (Dept. of Civil & Environmental System Engineering, University of Incheon) ;
  • Kim, Jong-In (Dept. of Civil & Environmental System Engineering, University of Incheon) ;
  • Choi, Min-Guen (Dept. of Civil & Environmental System Engineering, University of Incheon)
  • 신은철 (인천대학교 토목환경시스템공학과) ;
  • 박정준 (인천대학교 토목환경시스템공학과) ;
  • 김종인 (인천대학교 토목환경시스템공학과) ;
  • 최민근 (인천대학교 토목환경시스템공학과)
  • Published : 2005.10.07
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Abstract

Soil vapor extraction(SVE) is an effective and cost efficient method of removing volatile organic compounds(VOCs) and petroleum hydrocarbons from unsaturated soils. However, soil vapor extraction becomes ineffective in soils with low gas permeability, for example soils with air permeabilities less than 1 Darcy. Prefabricated vertical drains(PVDs) have been used for dewatering fine-grained soils for more than 25 years. Incorporating PVDs in and SVE system can extend the effectiveness of SVE to lower permeability soils by shortening the air flow-paths and ultimately expediting contaminant removal. The objective of the work described herein was to effectively incorporate PVDs into a SVE remediation system and to demonstrate a PVDs enhanced SVE system at full scale. The finding from this research will facilitate the design of field PVD-SVE systems in terms by providing insight into the optimal spacing between PVDs, the radius of influence of the wells and the flow rates to be used to capture and extract gas phase contaminants.

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