Laboratory Investigations of Cascade Crossflow Packed Towers for Air Stripping of Volatile Organics from Groundwater

Abstract

This report evaluates the effectiveness of a cascade crossflow air stripper for the removal of Volatile Organic Compounds (VOCs) from simulated groundwater. Experimental tests were conducted on four VOCs-methylene chloride, chloroform, 1,2-dichloroethane and carbon tetrachloride - on both a 6-inch internal diameter laboratory scale column and a 12-inch internal diameter pilot- scale column. The additional variable, alpha, which is the ratio of gas to liquid flow areas was investigated. Experimental data on stripping efficiencies were used to obtain mass transfer coefficients in crossflow operation. These mass transfer coefficients were compared with literature correlations obtained for conventional countercurrent operation, but modified appropriately for crossflow. For liquid phase controlled chemicals, the modified Onda's correlation satisfactorily predicted the crossflow mass transfer coefficient.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1990
Accession Number
ADA242496

Entities

People

  • Douglas P. Harrison
  • Kalliat T. Valsaraj
  • Louis J. Thibodeaus

Organizations

  • Louisiana State University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Flow
  • Air Force
  • Capital Investments
  • Carbon Tetrachloride
  • Chemistry
  • Chlorides
  • Cost Estimates
  • Economic Analysis
  • Economics
  • Engineering
  • Experimental Data
  • Gas Flow
  • Investments
  • Mass Transfer
  • Materials
  • Organic Compounds
  • Volatile Organic Compounds

Fields of Study

  • Environmental science

Readers

  • Analytical Chemistry
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Groundwater Contamination Remediation.