State-of-the-Art Review of Biocementation by Microbially Induced Calcite Precipitation (MICP) for Soil Stabilization

Mujah, Donovan; Shahin, Mohamed A.; Cheng, Liang

doi:10.1080/01490451.2016.1225866

Cited by 362 publications

(166 citation statements)

References 83 publications

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“…8 During MICP, the metabolic activity of microorganisms increases the saturation state local to the bacterial cell and promotes CaCO 3 precipitation. 1,2 While ureolytic microorganisms have been the focus of most MICP applications, 1,2,9 several alternative metabolic pathways also achieve CaCO 3 precipitation, such as carbonic anhydrase 10,11 and the carbon-concentrating mechanism of cyanobacteria. 12 Reparative (i.e., self-healing) applications of MICP require prolonged microorganism viability.…”

Section: Introductionmentioning

confidence: 99%

Biomineralization and Successive Regeneration of Engineered Living Building Materials

Heveran

Williams

Qiu

et al. 2020

Matter

131

130

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Living building materials (LBMs) were engineered using photosynthetic cyanobacteria and an inert sand-gelatin scaffold. Microorganisms biomineralized LBMs with calcium carbonate, which imparted higher fracture toughness compared with no-cell controls. The microorganisms maintained relatively high viability in LBMs as long as sufficient humidity conditions were provided. The microorganisms were capable of on-demand exponential regeneration in response to temperature and humidity switches. Looking forward, LBMs represent a new class of structural materials that can be engineered to exhibit multiple biological functionalities.

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Section: Introductionmentioning

confidence: 99%

Biomineralization and Successive Regeneration of Engineered Living Building Materials

Heveran

Williams

Qiu

et al. 2020

Matter

131

130

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“…In terms of soil improvement, the presence of clays in soils inhibits the cementation of cement-or lime-mixed soils, due to the expansion of a double layer of clay particles that reduce adhesion between clay particles and cement hydrates [79]. Moreover, high clay content is known to reduce the calcite precipitation efficiency due to the low void ratio and permeability of fine soils that restrict microbe or nutrient solutions transport in soil, thus limiting the application of MICP for real, in situ practices [62,63].…”

Section: Introductionmentioning

confidence: 99%

Shear strength behavior and parameters of microbial gellan gum-treated soils: from sand to clay

2018

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Microbial biopolymers have recently been introduced as a new material for soil treatment and improvement. Biopolymers provide significant strengthening to soil, even in small quantities (i.e., at 1/10th or less of the required amount of conventional binders, such as cement). In particular, thermo-gelating biopolymers, including agar gum, gellan gum, and xanthan gum, are known to strengthen soils noticeably, even under water-saturated conditions. However, an explicitly detailed examination of the microscopic interactions and strengthening characteristics between gellan gum and soil particles has not yet been performed. In this study, a series of laboratory experiments were performed to evaluate the effect of soil-gellan gum interactions on the strengthening behavior of gellan gum-treated soil mixtures (from sand to clay). The experimental results showed that the strengths of sand-clay mixtures were effectively increased by gellan gum treatment over those of pure sand or clay. The strengthening behavior is attributed to the conglomeration of fine particles as well as to the interconnection of fine and coarse particles, by gellan gum. Gellan gum treatment significantly improved not only interparticle cohesion but also the friction angle of clay-containing soils.

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“…The uniaxial compressive strength ranged from 0.15 to 1.22 MPa (one sample at 3.6 MPa) with CaCO3 contents between 0.6 and 7.5 wt%. In previously reported studies of microbial cemented sand, uniaxial compressive strength ranged between 0.15 to 34 MPa [29]. Even for similar amounts of precipitated CaCO3, the strength of the consolidated sand depends on the precipitation mechanism and the type and packing of aggregate material.…”

Section: The Need For Improvements In Recrystallization and Process Cmentioning

confidence: 92%

“…We expect that optimisation of the medium, including the glucose concentration, can result in higher production rates and final concentrations of acid and dissolved Ca 2+ . On the other hand, previous studies have shown that moderate concentrations of Ca 2+ (in the range of 100-500 mM, compared with 1 M) yield the best quality of cementation, due to more homogeneous and slower growth of calcium carbonate crystals [29]. Further work is therefore required to find the optimal acid concentration and corresponding concentration of Ca 2+ in this system.…”

mentioning

confidence: 96%

“…where a bacterial solution and reagent solution are sprayed alternatingly onto the sand surface and allowed to percolate down by gravity. This has been shown to yield fully cemented soil up to 2 m depth [29], but to work best for coarse-grained sands and soils. Although the knowledge about the final process components is limited, we believe that such aspects need to be considered early in the product development in order direct the ongoing research toward key challenges.…”

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confidence: 99%

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Towards a low CO₂ emission building material employing bacterial metabolism in a two-step process of limestone dissolution and recrystallization: The bacterial system and prototype production

Røyne

et al. 2019

Preprint

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The production of concrete for construction purposes is a major source of anthropogenic CO2 emissions. One promising avenue towards a more sustainable construction industry is to make use of naturally occurring mineral-microbe interactions, such as microbialinduced carbonate precipitation (MICP), to produce solid materials. In this paper, we present a new process where calcium carbonate in the form of powdered limestone is transformed to a binder material (termed BioZEment) through microbial dissolution and 2 recrystallization. For the dissolution step, a suitable bacterial strain, closely related to Bacillus pumilus, was isolated from soil near a limestone quarry. We show that this strain produces organic acids from glucose, inducing the dissolution of calcium carbonate in an aqueous slurry of powdered limestone. In the second step, the dissolved limestone solution is used as the calcium source for MICP in sand packed syringe moulds. The amounts of acid produced and calcium carbonate dissolved are shown to depend on the amount of available oxygen as well as the degree of mixing. Precipitation is induced through the pH increase caused by the hydrolysis of urea, mediated by the enzyme urease, which is produced in situ by the bacterium Sporosarcina pasteurii DSM33. The degree of successful consolidation of sand by BioZEment was found to depend on both the amount of urea and the amount of glucose available in the dissolution reaction.

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State-of-the-Art Review of Biocementation by Microbially Induced Calcite Precipitation (MICP) for Soil Stabilization

Cited by 362 publications

References 83 publications

Biomineralization and Successive Regeneration of Engineered Living Building Materials

Biomineralization and Successive Regeneration of Engineered Living Building Materials

Shear strength behavior and parameters of microbial gellan gum-treated soils: from sand to clay

Towards a low CO₂ emission building material employing bacterial metabolism in a two-step process of limestone dissolution and recrystallization: The bacterial system and prototype production

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State-of-the-Art Review of Biocementation by Microbially Induced Calcite Precipitation (MICP) for Soil Stabilization

Cited by 362 publications

References 83 publications

Biomineralization and Successive Regeneration of Engineered Living Building Materials

Biomineralization and Successive Regeneration of Engineered Living Building Materials

Shear strength behavior and parameters of microbial gellan gum-treated soils: from sand to clay

Towards a low CO2 emission building material employing bacterial metabolism in a two-step process of limestone dissolution and recrystallization: The bacterial system and prototype production

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Towards a low CO₂ emission building material employing bacterial metabolism in a two-step process of limestone dissolution and recrystallization: The bacterial system and prototype production