6 Citations (Scopus)

Abstract

Microbial denitrification or dissimilatory reduction of nitrate offers the potential of a sustainable and cost-effective method for mitigation of earthquake-induced liquefaction. Carbonate precipitation via microbial denitrification is a slow process and may take years to precipitate enough carbonate to provide the desired degree of mitigation. Fortunately, large amounts of nitrogen gas are generated immediately upon the onset of denitrification. As desaturation by biogas generation is itself a liquefaction mitigation mechanism, liquefaction mitigation via microbial denitrification may be viewed as a two-phase process: an initial phase wherein desaturation via biogas generation provides mitigation and a second phase in which sufficient carbonate precipitation has occurred to provide mitigation via particle cementation and/or an increase in dilatancy. Microbial denitrification is suitable for remediation under and around existing facilities because it is non-disruptive. An advantage of microbial denitrification compared to hydrolysis of urea (ureolysis), another technique for microbial precipitation of carbonate, is that its primary by-products are benign (non-toxic). Another advantage of microbial denitrification is that denitrifying bacteria are ubiquitous in the subsurface. Laboratory test data demonstrates the ability of microbial denitrification to both desaturate the soil and induce carbonate precipitation, leading to an increase in strength and dilatancy, substantiating the concept of microbial denitrification as a two-phase process for mitigation of earthquake-induced liquefaction.

Original languageEnglish (US)
Title of host publicationGeotechnical Special Publication
PublisherAmerican Society of Civil Engineers (ASCE)
Pages2286-2295
Number of pages10
VolumeGSP 256
ISBN (Print)9780784479087
DOIs
StatePublished - 2015
EventInternational Foundations Congress and Equipment Expo 2015, IFCEE 2015 - San Antonio, United States
Duration: Mar 17 2015Mar 21 2015

Other

OtherInternational Foundations Congress and Equipment Expo 2015, IFCEE 2015
CountryUnited States
CitySan Antonio
Period3/17/153/21/15

Fingerprint

Denitrification
Liquefaction
liquefaction
denitrification
Earthquakes
mitigation
earthquake
Carbonates
carbonate
dilatancy
Biogas
biogas
Remediation
cementation
Urea
urea
Byproducts
Precipitates
hydrolysis
Nitrates

ASJC Scopus subject areas

  • Building and Construction
  • Geotechnical Engineering and Engineering Geology
  • Civil and Structural Engineering
  • Architecture

Cite this

Kavazanjian, E., & O'Donnell, S. T. (2015). Mitigation of Earthquake-Induced Liquefaction via Microbial Denitrification: A Two-Phase Process. In Geotechnical Special Publication (Vol. GSP 256, pp. 2286-2295). American Society of Civil Engineers (ASCE). https://doi.org/10.1061/9780784479087.212

Mitigation of Earthquake-Induced Liquefaction via Microbial Denitrification : A Two-Phase Process. / Kavazanjian, Edward; O'Donnell, Sean T.

Geotechnical Special Publication. Vol. GSP 256 American Society of Civil Engineers (ASCE), 2015. p. 2286-2295.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kavazanjian, E & O'Donnell, ST 2015, Mitigation of Earthquake-Induced Liquefaction via Microbial Denitrification: A Two-Phase Process. in Geotechnical Special Publication. vol. GSP 256, American Society of Civil Engineers (ASCE), pp. 2286-2295, International Foundations Congress and Equipment Expo 2015, IFCEE 2015, San Antonio, United States, 3/17/15. https://doi.org/10.1061/9780784479087.212
Kavazanjian E, O'Donnell ST. Mitigation of Earthquake-Induced Liquefaction via Microbial Denitrification: A Two-Phase Process. In Geotechnical Special Publication. Vol. GSP 256. American Society of Civil Engineers (ASCE). 2015. p. 2286-2295 https://doi.org/10.1061/9780784479087.212
Kavazanjian, Edward ; O'Donnell, Sean T. / Mitigation of Earthquake-Induced Liquefaction via Microbial Denitrification : A Two-Phase Process. Geotechnical Special Publication. Vol. GSP 256 American Society of Civil Engineers (ASCE), 2015. pp. 2286-2295
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