Removal of aqueous phase trichloroethylene using membrane air stripping contactors

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This work investigates the use of membrane air-stripping (MAS) contactors containing microporous polypropylene hollow-fiber membranes to remove volatile organic compounds from water into the gas phase. Experiments using countercurrent and cross-flow flow configurations to remove trichloroethylene (TCE) from water into air were performed. The effects of influent TCE concentration, liquid and gas flow rates, and air-to-water ratio were investigated. In each case studied, it was found that mass transfer in MAS contactors is controlled by liquid-phase resistance. Maximum removal of TCE was obtained at air-to-water ratios that were significantly lower than those required for conventional packed-tower stripping. Mathematical models based on empirical correlations for the liquid-phase convective mass transfer coefficients were developed and validated with experimental data, and subsequently used to perform simulations of full-scale MAS contactors. At the operating conditions explored, full-scale cross-flow contactors were shown to be superior to countercurrent-flow contactors: for the same gas and liquid flow rates and number of fibers, cross-flow contactors removed more than 95% of the original TCE in the feed liquid whereas countercurrent-flow contactors removed less than 50%. In comparison with packed-tower stripping, MAS contactors are shown to be an alternative feasible technology.

Original languageEnglish (US)
Pages (from-to)1232-1241
Number of pages10
JournalJournal of Environmental Engineering
Volume130
Issue number11
DOIs
StatePublished - Nov 2004

Fingerprint

Trichloroethylene
trichloroethylene
membrane
Membranes
air
Air
countercurrent
liquid
Liquids
Water
Towers
mass transfer
Mass transfer
Gases
Flow rate
Volatile Organic Compounds
water
Fibers
Polypropylenes
removal

Keywords

  • Abatement and removal
  • Air stripping
  • Contactors
  • Mass transfer
  • Membranes
  • TCE
  • Volatile organic chemicals
  • Water treatment

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Science(all)
  • Environmental Chemistry
  • Civil and Structural Engineering

Cite this

@article{a759742181b949e3bd58a8eac4f9bd21,
title = "Removal of aqueous phase trichloroethylene using membrane air stripping contactors",
abstract = "This work investigates the use of membrane air-stripping (MAS) contactors containing microporous polypropylene hollow-fiber membranes to remove volatile organic compounds from water into the gas phase. Experiments using countercurrent and cross-flow flow configurations to remove trichloroethylene (TCE) from water into air were performed. The effects of influent TCE concentration, liquid and gas flow rates, and air-to-water ratio were investigated. In each case studied, it was found that mass transfer in MAS contactors is controlled by liquid-phase resistance. Maximum removal of TCE was obtained at air-to-water ratios that were significantly lower than those required for conventional packed-tower stripping. Mathematical models based on empirical correlations for the liquid-phase convective mass transfer coefficients were developed and validated with experimental data, and subsequently used to perform simulations of full-scale MAS contactors. At the operating conditions explored, full-scale cross-flow contactors were shown to be superior to countercurrent-flow contactors: for the same gas and liquid flow rates and number of fibers, cross-flow contactors removed more than 95{\%} of the original TCE in the feed liquid whereas countercurrent-flow contactors removed less than 50{\%}. In comparison with packed-tower stripping, MAS contactors are shown to be an alternative feasible technology.",
keywords = "Abatement and removal, Air stripping, Contactors, Mass transfer, Membranes, TCE, Volatile organic chemicals, Water treatment",
author = "Jiahan He and Arnold, {Robert G} and Saez, {Avelino E} and Eric Betterton and Ela, {Wendell P}",
year = "2004",
month = "11",
doi = "10.1061/(ASCE)0733-9372(2004)",
language = "English (US)",
volume = "130",
pages = "1232--1241",
journal = "Journal of Environmental Engineering, ASCE",
issn = "0733-9372",
publisher = "American Society of Civil Engineers (ASCE)",
number = "11",

}

TY - JOUR

T1 - Removal of aqueous phase trichloroethylene using membrane air stripping contactors

AU - He, Jiahan

AU - Arnold, Robert G

AU - Saez, Avelino E

AU - Betterton, Eric

AU - Ela, Wendell P

PY - 2004/11

Y1 - 2004/11

N2 - This work investigates the use of membrane air-stripping (MAS) contactors containing microporous polypropylene hollow-fiber membranes to remove volatile organic compounds from water into the gas phase. Experiments using countercurrent and cross-flow flow configurations to remove trichloroethylene (TCE) from water into air were performed. The effects of influent TCE concentration, liquid and gas flow rates, and air-to-water ratio were investigated. In each case studied, it was found that mass transfer in MAS contactors is controlled by liquid-phase resistance. Maximum removal of TCE was obtained at air-to-water ratios that were significantly lower than those required for conventional packed-tower stripping. Mathematical models based on empirical correlations for the liquid-phase convective mass transfer coefficients were developed and validated with experimental data, and subsequently used to perform simulations of full-scale MAS contactors. At the operating conditions explored, full-scale cross-flow contactors were shown to be superior to countercurrent-flow contactors: for the same gas and liquid flow rates and number of fibers, cross-flow contactors removed more than 95% of the original TCE in the feed liquid whereas countercurrent-flow contactors removed less than 50%. In comparison with packed-tower stripping, MAS contactors are shown to be an alternative feasible technology.

AB - This work investigates the use of membrane air-stripping (MAS) contactors containing microporous polypropylene hollow-fiber membranes to remove volatile organic compounds from water into the gas phase. Experiments using countercurrent and cross-flow flow configurations to remove trichloroethylene (TCE) from water into air were performed. The effects of influent TCE concentration, liquid and gas flow rates, and air-to-water ratio were investigated. In each case studied, it was found that mass transfer in MAS contactors is controlled by liquid-phase resistance. Maximum removal of TCE was obtained at air-to-water ratios that were significantly lower than those required for conventional packed-tower stripping. Mathematical models based on empirical correlations for the liquid-phase convective mass transfer coefficients were developed and validated with experimental data, and subsequently used to perform simulations of full-scale MAS contactors. At the operating conditions explored, full-scale cross-flow contactors were shown to be superior to countercurrent-flow contactors: for the same gas and liquid flow rates and number of fibers, cross-flow contactors removed more than 95% of the original TCE in the feed liquid whereas countercurrent-flow contactors removed less than 50%. In comparison with packed-tower stripping, MAS contactors are shown to be an alternative feasible technology.

KW - Abatement and removal

KW - Air stripping

KW - Contactors

KW - Mass transfer

KW - Membranes

KW - TCE

KW - Volatile organic chemicals

KW - Water treatment

UR - http://www.scopus.com/inward/record.url?scp=8644268073&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=8644268073&partnerID=8YFLogxK

U2 - 10.1061/(ASCE)0733-9372(2004)

DO - 10.1061/(ASCE)0733-9372(2004)

M3 - Article

VL - 130

SP - 1232

EP - 1241

JO - Journal of Environmental Engineering, ASCE

JF - Journal of Environmental Engineering, ASCE

SN - 0733-9372

IS - 11

ER -