Performance of a sequential reactive barrier for Bioremediation of coal tar contaminated groundwater

Oriol Gibert, Andrew S. Ferguson, Robert M. Kalin, Rory Doherty, Keith W. Dickson, Karen L. McGeough, Jamie Robinson, Russell Thomas

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Following a thorough site investigation, a biological Sequential Reactive Barrier (SEREBAR), designed to remove Polycyclic Aromatic Hydrocarbons (PAHs) and BTEX compounds, was installed at a Former Manufactured Gas Plant (FMGP) site. The novel design of the barrier comprises, in series, an interceptor and six reactive chambers. The first four chambers (2 nonaerated-2 aerated) were filled with sand to encourage microbial colonization. Sorbant Granular Activated Carbon (GAC) was present in the final two chambers in order to remove any recalcitrant compounds. The SEREBAR has been in continuous operation for 2 years at different operational flow rates (ranging from 320 L/d to 4000 L/d, with corresponding residence times in each chamber of 19 days and 1.5 days, respectively). Under low flow rate conditions (320−520 L/d) the majority of contaminant removal (>93%) occurred biotically within the interceptor and the aerated chambers. Under high flow rates (1000−4000 L/d) and following the installation of a new interceptor to prevent passive aeration, the majority of contaminant removal (>80%) again occurred biotically within the aerated chambers. The sorption zone (GAC) proved to be an effective polishing step, removing any remaining contaminants to acceptable concentrations before discharge down-gradient of the SEREBAR (overall removals >95%).
LanguageEnglish
Pages6795-6801
Number of pages7
JournalEnvironmental Science and Technology
Volume41
Issue number19
DOIs
Publication statusPublished - 1 Oct 2007

Fingerprint

Coal Tar
coal tar
reactive barrier
Bioremediation
bioremediation
Groundwater
Flow rate
Impurities
Activated carbon
activated carbon
groundwater
pollutant
Gas plants
BTEX
Polycyclic Aromatic Hydrocarbons
site investigation
Polishing
low flow
aeration
Sorption

Keywords

  • Sequential Reactive Barrier
  • SEREBAR
  • Polycyclic Aromatic Hydrocarbons
  • microbial colonization

Cite this

Gibert, Oriol ; Ferguson, Andrew S. ; Kalin, Robert M. ; Doherty, Rory ; Dickson, Keith W. ; McGeough, Karen L. ; Robinson, Jamie ; Thomas, Russell. / Performance of a sequential reactive barrier for Bioremediation of coal tar contaminated groundwater. In: Environmental Science and Technology. 2007 ; Vol. 41, No. 19. pp. 6795-6801.
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Gibert, O, Ferguson, AS, Kalin, RM, Doherty, R, Dickson, KW, McGeough, KL, Robinson, J & Thomas, R 2007, 'Performance of a sequential reactive barrier for Bioremediation of coal tar contaminated groundwater' Environmental Science and Technology, vol. 41, no. 19, pp. 6795-6801. https://doi.org/10.1021/es071527f

Performance of a sequential reactive barrier for Bioremediation of coal tar contaminated groundwater. / Gibert, Oriol; Ferguson, Andrew S.; Kalin, Robert M.; Doherty, Rory; Dickson, Keith W.; McGeough, Karen L.; Robinson, Jamie; Thomas, Russell.

In: Environmental Science and Technology, Vol. 41, No. 19, 01.10.2007, p. 6795-6801.

Research output: Contribution to journalArticle

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