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A revised model for microbially induced calcite precipitation: Improvements and new insights based on recent experiments

Journal Article · · Water Resources Research
DOI:https://doi.org/10.1002/2014WR016503· OSTI ID:1402191
 [1];  [2];  [2];  [2];  [2];  [1];  [3];  [1]
  1. Department of Hydromechanics and Modelling of Hydrosystems University of Stuttgart Stuttgart Germany
  2. Center for Biofilm Engineering, Montana State University Bozeman Montana USA
  3. Department of Earth Science and Engineering Imperial College London London UK

Abstract

The model for microbially induced calcite precipitation (MICP) published by Ebigbo et al. (2012) has been improved based on new insights obtained from experiments and model calibration. The challenge in constructing a predictive model for permeability reduction in the underground with MICP is the quantification of the complex interaction between flow, transport, biofilm growth, and reaction kinetics. New data from Lauchnor et al. (2015) on whole‐cell ureolysis kinetics from batch experiments were incorporated into the model, which has allowed for a more precise quantification of the relevant parameters as well as a simplification of the reaction kinetics in the equations of the model. Further, the model has been calibrated objectively by inverse modeling using quasi‐1D column experiments and a radial flow experiment. From the postprocessing of the inverse modeling, a comprehensive sensitivity analysis has been performed with focus on the model input parameters that were fitted in the course of the model calibration. It reveals that calcite precipitation and concentrations of and are particularly sensitive to parameters associated with the ureolysis rate and the attachment behavior of biomass. Based on the determined sensitivities and the ranges of values for the estimated parameters in the inversion, it is possible to identify focal areas where further research can have a high impact toward improving the understanding and engineering of MICP.

Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0010099; FE0004478; FE0009599
OSTI ID:
1402191
Journal Information:
Water Resources Research, Journal Name: Water Resources Research Journal Issue: 5 Vol. 51; ISSN 0043-1397
Publisher:
American Geophysical Union (AGU)Copyright Statement
Country of Publication:
United States
Language:
English

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