Abstract
Currently new ground reinforcement techniques are being developed based on microbially induced carbonate precipitation (MICP). Many studies on MICP use microbially catalyzed hydrolysis of urea to produce carbonate. In the presence of dissolved calcium this process leads to precipitation of calcium carbonate crystals, which form bridges between the sand grains and hence increase strength and stiffness. In addition to urea hydrolysis, there are many other microbial processes which can lead to the precipitation of calcium carbonate. In this study the theoretical feasibility of these alternative MICP processes for ground reinforcement is evaluated. Evaluation factors are substrate solubility, CaCO3 yield, reaction rate and type and amount of side-product. The most suitable candidate as alternative MICP method for sand consolidation turned out to be microbial denitrification of calcium nitrate, using calcium salts of fatty acids as electron donor and carbon source. This process leads to calcium carbonate precipitation, bacterial growth and production of nitrogen gas and some excess carbon dioxide. The feasibility of MICP by denitrification is tested experimentally in liquid batch culture, on agar plate and in sand column experiments. Results of these experiments are presented and discussed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 168-175 |
| Number of pages | 8 |
| Journal | Ecological Engineering |
| Volume | 36 |
| Issue number | 2 |
| DOIs | |
| State | Published - Feb 1 2010 |
| Externally published | Yes |
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Keywords
- Biogrout
- Calcium carbonate
- Denitrification
- Microbially induced carbonate precipitation (MICP)
- Soil reinforcement
ASJC Scopus subject areas
- Environmental Engineering
- Nature and Landscape Conservation
- Management, Monitoring, Policy and Law
Cite this
Potential soil reinforcement by biological denitrification. / van Paassen, Leon; Daza, Claudia M.; Staal, Marc; Sorokin, Dimitri Y.; van der Zon, Willem; van Loosdrecht, Mark C.M.
In: Ecological Engineering, Vol. 36, No. 2, 01.02.2010, p. 168-175.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Potential soil reinforcement by biological denitrification
AU - van Paassen, Leon
AU - Daza, Claudia M.
AU - Staal, Marc
AU - Sorokin, Dimitri Y.
AU - van der Zon, Willem
AU - van Loosdrecht, Mark C.M.
PY - 2010/2/1
Y1 - 2010/2/1
N2 - Currently new ground reinforcement techniques are being developed based on microbially induced carbonate precipitation (MICP). Many studies on MICP use microbially catalyzed hydrolysis of urea to produce carbonate. In the presence of dissolved calcium this process leads to precipitation of calcium carbonate crystals, which form bridges between the sand grains and hence increase strength and stiffness. In addition to urea hydrolysis, there are many other microbial processes which can lead to the precipitation of calcium carbonate. In this study the theoretical feasibility of these alternative MICP processes for ground reinforcement is evaluated. Evaluation factors are substrate solubility, CaCO3 yield, reaction rate and type and amount of side-product. The most suitable candidate as alternative MICP method for sand consolidation turned out to be microbial denitrification of calcium nitrate, using calcium salts of fatty acids as electron donor and carbon source. This process leads to calcium carbonate precipitation, bacterial growth and production of nitrogen gas and some excess carbon dioxide. The feasibility of MICP by denitrification is tested experimentally in liquid batch culture, on agar plate and in sand column experiments. Results of these experiments are presented and discussed.
AB - Currently new ground reinforcement techniques are being developed based on microbially induced carbonate precipitation (MICP). Many studies on MICP use microbially catalyzed hydrolysis of urea to produce carbonate. In the presence of dissolved calcium this process leads to precipitation of calcium carbonate crystals, which form bridges between the sand grains and hence increase strength and stiffness. In addition to urea hydrolysis, there are many other microbial processes which can lead to the precipitation of calcium carbonate. In this study the theoretical feasibility of these alternative MICP processes for ground reinforcement is evaluated. Evaluation factors are substrate solubility, CaCO3 yield, reaction rate and type and amount of side-product. The most suitable candidate as alternative MICP method for sand consolidation turned out to be microbial denitrification of calcium nitrate, using calcium salts of fatty acids as electron donor and carbon source. This process leads to calcium carbonate precipitation, bacterial growth and production of nitrogen gas and some excess carbon dioxide. The feasibility of MICP by denitrification is tested experimentally in liquid batch culture, on agar plate and in sand column experiments. Results of these experiments are presented and discussed.
KW - Biogrout
KW - Calcium carbonate
KW - Denitrification
KW - Microbially induced carbonate precipitation (MICP)
KW - Soil reinforcement
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UR - http://www.scopus.com/inward/citedby.url?scp=74149091656&partnerID=8YFLogxK
U2 - 10.1016/j.ecoleng.2009.03.026
DO - 10.1016/j.ecoleng.2009.03.026
M3 - Article
VL - 36
SP - 168
EP - 175
JO - Ecological Engineering
JF - Ecological Engineering
SN - 0925-8574
IS - 2
ER -