Bench-scale evaluation of aerosol delivery for biostimulation and bioaugmentation in the vadose zone

Aerosol delivery was evaluated for distributing biostimulation and bioaugmentation amendments in vadose zones. This technique involves transporting amendments as micron-scale aerosol droplets in injected gas. Microcosm experiments were designed to characterize reductive dechlorination of trichloroet...

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Bibliographic Details
Published in:Biodegradation (Dordrecht) 2015-04, Vol.26 (2), p.91-103
Main Authors: Hall, Richard J., Murdoch, Lawrence C., Freedman, David L., Looney, Brian B., Riha, Brian D.
Format: Article
Language:English
Subjects:
Aerosols
Analysis
Aquatic Pollution
Biodegradation, Environmental
Biomedical and Life Sciences
Bioremediation
Chloroflexi - metabolism
Dechlorination
Geochemistry
Groundwater - chemistry
Halogenation
Life Sciences
Microbial Consortia - physiology
Microbiology
Original Paper
Oxidation-Reduction
Soil Science & Conservation
Soybean
Soybean oil
Soybean Oil - chemistry
Soybeans
Terrestrial Pollution
Trichloroethylene - metabolism
Vadose water
Vegetable oils
Waste Management/Waste Technology
Waste Water Technology
Water Management
Water Pollutants, Chemical - metabolism
Water Pollution Control
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Summary:Aerosol delivery was evaluated for distributing biostimulation and bioaugmentation amendments in vadose zones. This technique involves transporting amendments as micron-scale aerosol droplets in injected gas. Microcosm experiments were designed to characterize reductive dechlorination of trichloroethene (TCE) under unsaturated conditions when delivering components as aerosols. Delivering amendments and/or microbes as aqueous aerosols resulted in complete dechlorination of TCE, similar to controls operated under saturated conditions. Reductive dechlorination was achieved with manual injection of a bioaugmentation culture suspended in soybean oil into microcosms. However, aerosol delivery of the culture in soybean oil induced little reductive dechlorination activity. Overall, the results indicate that delivery as aqueous aerosols may be a viable option for delivery of amendments to enhance vadose zone bioremediation at the field-scale.
ISSN:0923-9820
1572-9729
DOI:10.1007/s10532-015-9718-5