A coupled bio-chemo-hydraulic model to predict porosity and permeability reduction during microbially induced calcite precipitation

Wang, Xuerui; Nackenhorst, Udo

doi:10.1016/j.advwatres.2020.103563

Cited by 52 publications

(41 citation statements)

References 44 publications

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“…On the biochemical aspect, the developed models normally consider both solid and aqueous phases and take various coupling mechanisms into account including the flow of the aqueous phase, and the transport of the chemical and bacterial components (i.e. advection, diffusion, dispersion, sorption, bacterial decay) in these two phases (Matsubara et al, 2020; Wang & Nackenhorst, 2020). Researchers may have different assumptions for the phase adsorption of diverse species and chemical components, which could either simplify or complicate models.…”

Section: Characterization Of Micp Processesmentioning

confidence: 99%

“…Researchers may have different assumptions for the phase adsorption of diverse species and chemical components, which could either simplify or complicate models. For instance, Wang and Nackenhorst (2020) assumed that both the urea and ammonium were in the liquid phase, while Fauriel and Laloui (2012) divided them into two parts: solute ammonium/urea in the liquid phase and absorbed ammonium/urea in the solid phase. Furthermore, based on the different assumptions of distribution of various aqueous chemicals and reactants, two types of models have been applied in previous studies: macroscopic continuum and pore‐scale models (Wang & Nackenhorst, 2020).…”

Section: Characterization Of Micp Processesmentioning

confidence: 99%

“…For instance, Wang and Nackenhorst (2020) assumed that both the urea and ammonium were in the liquid phase, while Fauriel and Laloui (2012) divided them into two parts: solute ammonium/urea in the liquid phase and absorbed ammonium/urea in the solid phase. Furthermore, based on the different assumptions of distribution of various aqueous chemicals and reactants, two types of models have been applied in previous studies: macroscopic continuum and pore‐scale models (Wang & Nackenhorst, 2020). Macroscopic continuum models are based on homogenization techniques and have been shown to have advantages in large‐scale MICP applications (Cunningham et al, 2018; Fauriel & Laloui, 2012; Hommel et al, 2015).…”

Section: Characterization Of Micp Processesmentioning

confidence: 99%

“…The aqueous biochemical components are assumed to be mixed completely, and the impacts of the local incomplete mixing of reactants at the pore throat are not covered. Pore‐scale models focus more on the local heterogeneity; thus, the variations in porosity and permeability could be considered (Qin et al, 2016; Wang & Nackenhorst, 2020).…”

Section: Characterization Of Micp Processesmentioning

confidence: 99%

See 3 more Smart Citations

Bio‐mediated soil improvement: An introspection into processes, materials, characterization and applications

Jiang

Wang

Chu

et al. 2021

Soil Use and Management

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For a long time in the practice of geotechnical engineering, soil has been viewed as an inert material, comprising only inorganic phases. However, microorganisms including bacteria, archaea and eukaryotes are ubiquitous in soil and have the capacity and capability to alter bio‐geochemical processes in the local soil environment. The cumulative changes could consequently modify the physical, mechanical, conductive and chemical properties of the bulk soil matrix. In recent years, the topic of bio‐mediated geotechnics has gained momentum in the scientific literature. It involves the manipulation of various bio‐geochemical soil processes to improve soil engineering performance. In particular, the process of microbial‐induced calcium carbonate precipitation (MICP) has received the most attention for its superior performance for soil improvement. The present work aims to shape a comprehensive understanding of recent developments in bio‐mediated geotechnics, with a focus on MICP. Referring to around one hundred studies published over the past five years, this review focuses on popular and alternative MICP processes, innovative raw materials and additives for MICP, emerging tools and testing methodologies for characterizing MICP at multi‐scale, and applications in emerging and/or unconventional geotechnical fields.

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Section: Characterization Of Micp Processesmentioning

confidence: 99%

Section: Characterization Of Micp Processesmentioning

confidence: 99%

Section: Characterization Of Micp Processesmentioning

confidence: 99%

Section: Characterization Of Micp Processesmentioning

confidence: 99%

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Bio‐mediated soil improvement: An introspection into processes, materials, characterization and applications

Jiang

Wang

Chu

et al. 2021

Soil Use and Management

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“…The results showed that mechanical properties are related to CaCO 3 content. Wang et al [111] established a biochemical-hydraulic model, which proposes the concept of porosity to reflect the change of permeability. Their results showed that the pore structure has an important influence on the curing rate, the maximum urease rate has an indispensable influence on the hydraulic response of MICP, and the MICP reaction rate is influenced by the concentration of the bacterial and cementation solutions.…”

Section: Models For Predicting the Curing Process Of Micp In The Fieldmentioning

confidence: 99%

Critical Review of Solidification of Sandy Soil by Microbially Induced Carbonate Precipitation (MICP)

et al. 2021

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Microbially induced carbonate precipitation (MICP) is a promising technology for solidifying sandy soil, ground improvement, repairing concrete cracks, and remediation of polluted land. By solidifying sand into soil capable of growing shrubs, MICP can facilitate peak and neutralization of CO2 emissions because each square meter of shrub can absorb 253.1 grams of CO2 per year. In this paper, based on the critical review of the microbial sources of solidified sandy soil, models used to predict the process of sand solidification and factors controlling the MICP process, current problems in microbial sand solidification are analyzed and future research directions, ideas and suggestions for the further study and application of MICP are provided. The following topics are considered worthy of study: (1) MICP methods for evenly distributing CaCO3 deposit; (2) minimizing NH4+ production during MICP; (3) mixed fermentation and interaction of internal and exogenous urea-producing bacteria; (4) MICP technology for field application under harsh conditions; (5) a hybrid solidification method by combining MICP with traditional sand barrier and chemical sand consolidation; and (6) numerical model to simulate the erosion resistance of sand treated by MICP.

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Controlling pore-scale processes to tame subsurface biomineralization

Jiménez‐Martínez

Nguyen

2022

Rev Environ Sci Biotechnol

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Microorganisms capable of biomineralization can catalyze mineral precipitation by modifying local physical and chemical conditions. In porous media, such as soil and rock, these microorganisms live and function in highly heterogeneous physical, chemical and ecological microenvironments, with strong local gradients created by both microbial activity and the pore-scale structure of the subsurface. Here, we focus on extracellular bacterial biomineralization, which is sensitive to external heterogeneity, and review the pore-scale processes controlling microbial biomineralization in natural and engineered porous media. We discuss how individual physical, chemical and ecological factors integrate to affect the spatial and temporal control of biomineralization, and how each of these factors contributes to a quantitative understanding of biomineralization in porous media. We find that an improved understanding of microbial behavior in heterogeneous microenvironments would promote understanding of natural systems and output in diverse technological applications, including improved representation and control of fluid mixing from pore to field scales. We suggest a range of directions by which future work can build from existing tools to advance each of these areas to improve understanding and predictability of biomineralization science and technology.

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A coupled bio-chemo-hydraulic model to predict porosity and permeability reduction during microbially induced calcite precipitation

Cited by 52 publications

References 44 publications

Bio‐mediated soil improvement: An introspection into processes, materials, characterization and applications

Bio‐mediated soil improvement: An introspection into processes, materials, characterization and applications

Critical Review of Solidification of Sandy Soil by Microbially Induced Carbonate Precipitation (MICP)

Controlling pore-scale processes to tame subsurface biomineralization

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