Relevant bibliographies by topics / Microbial induced calcite precipitation (micp)

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Microbial induced calcite precipitation (micp)'

Author: Grafiati
Published: 4 June 2021
Last updated: 9 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Microbial induced calcite precipitation (micp).'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Microbial induced calcite precipitation (micp)"

1

Zehner, Jennifer, Anja Røyne, and Pawel Sikorski. "Calcite seed-assisted microbial induced carbonate precipitation (MICP)." PLOS ONE 16, no. 2 (February 9, 2021): e0240763. http://dx.doi.org/10.1371/journal.pone.0240763.

Full text
Abstract:
Microbial-induced calcium carbonate precipitation (MICP) is a biological process inducing biomineralization of CaCO3. This can be used to form a solid, concrete-like material. To be able to use MICP successfully to produce solid materials, it is important to understand the formation process of the material in detail. It is well known that crystallization surfaces can influence the precipitation process. Therefore, we present in this contribution a systematic study investigating the influence of calcite seeds on the MICP process. We focus on the changes in the pH and changes of the optical density (OD) signal measured with absorption spectroscopy to analyze the precipitation process. Furthermore, optical microscopy was used to visualize the precipitation processes in the sample and connect them to changes in the pH and OD. We show, that there is a significant difference in the pH evolution between samples with and without calcite seeds present and that the shape of the pH evolution and the changes in OD can give detailed information about the mineral precipitation and transformations. In the presented experiments we show, that amorphous calcium carbonate (ACC) can also precipitate in the presence of initial calcite seeds and this can have implications for consolidated MICP materials.
APA, Harvard, Vancouver, ISO, and other styles
2

Xiao, J. Z., Y. Q. Wei, H. Cai, Z. W. Wang, T. Yang, Q. H. Wang, and S. F. Wu. "Microbial-Induced Carbonate Precipitation for Strengthening Soft Clay." Advances in Materials Science and Engineering 2020 (April 14, 2020): 1–11. http://dx.doi.org/10.1155/2020/8140724.

Full text
Abstract:
Currently, calcite produced in sediments by microbial-induced carbonate precipitation (MICP) is mainly used as a strengthening binder in sand because sands are porous and have good permeability. Conventional wisdom does not consider MICP to be suitable for use in soft clay because of the clay particles’ small size and its minimal porosity. Because of the clay’s high water content and complex chemical composition, very little research has been done and not much is known about the use of MICP in soft clay for strength enhancement. For this paper, soft clay specimens were prepared by mixing a solution containing Sporosarcina pasteurii bacteria, solutions with different concentrations of nutrient salts, and soft clay. Unconfined compressive strength tests were carried out on these specimens after they had cured for 28 days in a moisture-controlled environment. These laboratory tests were used to study the chemical reactions, the clay’s strength, and other influencing factors. The results are as follows: (1) directly mixing a S. pasteurii solution, nutrient salts, and soft clay considerably improves the uniformity of the spatial distribution of the bacteria and the nutrients in the soft clay. Directly mixing these constituents promotes the formation of calcium carbonate and greatly simplifies soft clay sample preparation. (2) It is feasible to use MICP to increase the strength of soft clay. Compared to control specimens cured under the same conditions but without introduced nutrients and bacteria solution, the unconfined compressive strength of MICP-treated specimens can be increased by as much as 2.42 times to an unconfined compressive strength of 43.31 kPa. The water content in MICP-treated specimens was significantly reduced by the MICP reactions and in one case decreased from 40% to 30.73%. (3) The strength enhancement of microbially solidified soft clay is the result of two processes: urea hydration catalyzed by enzymes consumes water in the clay and the bacterially precipitated calcite forms in the sediment’s pores. (4) The micro-organism-produced calcite in the soft clay increases the calcite abundance from 0% to as much as 3.5%. (5) The MICP-treated strength of soft clay varies with the concentration of the nutrients provided. For the experimental conditions used for this paper, the optimum concentration of the CaCl2·2H2O and CH4N2O nutrients is 0.5 mol/L.
APA, Harvard, Vancouver, ISO, and other styles
3

Raveh-Amit, Hadas, and Michael Tsesarsky. "Biostimulation in Desert Soils for Microbial-Induced Calcite Precipitation." Applied Sciences 10, no. 8 (April 23, 2020): 2905. http://dx.doi.org/10.3390/app10082905.

Full text
Abstract:
Microbial-induced calcite precipitation (MICP) is a soil amelioration technique aiming to mitigate different environmental and engineering concerns, including desertification, soil erosion, and soil liquefaction, among others. The hydrolysis of urea, catalyzed by the microbial enzyme urease, is considered the most efficient microbial pathway for MICP. Biostimulated MICP relies on the enhancement of indigenous urea-hydrolyzing bacteria by providing an appropriate enrichment and precipitation medium, as opposed to bioaugmentation, which requires introducing large volumes of exogenous bacterial cultures into the treated soil along with a growth and precipitation medium. Biostimulated MICP in desert soils is challenging as the total carbon content and the bacterial abundance are considerably low. In this study, we examined the biostimulation potential in soils from the Negev Desert, Israel, for the purpose of mitigation of topsoil erosion in arid environments. Incubating soil samples in urea and enrichment media demonstrated effective urea hydrolysis leading to pH increase, which is necessary for calcite precipitation. Biostimulation rates were found to increase with concentrations of energy (carbon) source in the stimulation media, reaching its maximal levels within 3 to 6 days. Following stimulation, calcium carbonate precipitation was induced by spiking stimulated bacteria in precipitation (CaCl2 enriched) media. The results of our research demonstrate that biostimulated MICP is feasible in the low-carbon, mineral soils of the northern Negev Desert in Israel.
APA, Harvard, Vancouver, ISO, and other styles
4

Saneiyan, Sina, Dimitrios Ntarlagiannis, and Frederick Colwell. "Complex conductivity signatures of microbial induced calcite precipitation, field and laboratory scales." Geophysical Journal International 224, no. 3 (October 23, 2020): 1811–24. http://dx.doi.org/10.1093/gji/ggaa510.

Full text
Abstract:
SUMMARY Soil stabilization processes aim at enhancing soil's engineering properties. Although the concept is straightforward, it involves physical and chemical changes to the subsurface that could result in local environmental changes. Compared to conventional soil stabilization methods (such as cement grouting), bio-mediated soil stabilization, such as microbial-induced calcite precipitation (MICP), offers the opportunity to minimize environmental impact, but the underlying processes need to be well understood for proper applications. Accurate characterization and long-term monitoring are paramount for the success of soil improvement, especially MICP treatments. Spectral induced polarization (SIP), an established geophysical method, has shown to be sensitive to MICP processes and products (e.g. calcite). In this work, we performed a two-phase study to explore SIP's suitability as a monitoring tool. Phase 1 involved a laboratory scale MICP study under controlled conditions and phase 2 a pilot field scale study. In the laboratory, MICP was induced through the introduction of ureolytic microorganisms, while in the field, indigenous soil microbes were stimulated to promote ureolysis. In both cases, traditional geochemical monitoring, along with spatiotemporally dense SIP monitoring, were performed. Over the course of the laboratory study, SIP successfully tracked the MICP progress as well as the calcite precipitation behaviour. Similarly, the SIP results of the field scale study showed to be sensitive to the subsurface changes in response to MICP. SIP offered spatiotemporally rich information on the MICP progress and process status. The similarity between observed signal trends in the laboratory and field in this study clearly proved that SIP signals from MICP in controlled laboratory environments can be successfully used to study field MICP applications despite scale and complexity differences.
APA, Harvard, Vancouver, ISO, and other styles
5

Liang, Jiaming, Zhengyang Guo, Lijun Deng, and Yang Liu. "Mature fine tailings consolidation through microbial induced calcium carbonate precipitation." Canadian Journal of Civil Engineering 42, no. 11 (November 2015): 975–78. http://dx.doi.org/10.1139/cjce-2015-0069.

Full text
Abstract:
The performance and mechanisms of a microbial induced calcite precipitation (MICP)-assisted mature fine tailings (MFT) consolidation method was assessed. Mature fine tailings samples of 35 wt% and 60 wt% were treated with MICP by ureolysis. The undrained shear strength of treated MFT was measured to evaluate the effects of MICP on MFT consolidation. To investigate the surface interaction mechanisms involved in the process, the size and shape of MFT particles were observed using scanning electron microscopy. The results showed that ureolysis-driven MICP can accelerate raw MFT consolidation, leaving compact sludge with significantly enhanced shear strength within 24 h of the experiment.
APA, Harvard, Vancouver, ISO, and other styles
6

Kim, Gunjo, Janghwan Kim, and Heejung Youn. "Effect of Temperature, pH, and Reaction Duration on Microbially Induced Calcite Precipitation." Applied Sciences 8, no. 8 (August 1, 2018): 1277. http://dx.doi.org/10.3390/app8081277.

Full text
Abstract:
In this study, the amount of calcite precipitate resulting from microbially induced calcite precipitation (MICP) was estimated in order to determine the optimal conditions for precipitation. Two microbial species (Staphylococcus saprophyticus and Sporosarcina pasteurii) were tested by varying certain parameters such as (1) initial potential of hydrogen (pH) of urea-CaCl2 medium, (2) temperature during precipitation, and (3) the reaction duration. The pH values used for testing were 6, 7, 8, 9, and 10, the temperatures were 20, 30, 40, and 50 °C, and the reaction durations were 2, 3, and 4 days. Maximum calcite precipitation was observed at a pH of 7 and temperature of 30 °C. Most of the precipitation occurred within a reaction duration of 3 days. Under similar conditions, the amount of calcite precipitated by S. saprophyticus was estimated to be five times more than that by S. pasteurii. Both the species were sensitive to temperature; however, S. saprophyticus was less sensitive to pH and required a shorter reaction duration than S. pasteurii.
APA, Harvard, Vancouver, ISO, and other styles
7

Bao, Ruotian, Junhong Li, Lin Li, Teresa J. Cutright, Long Chen, Jiahua Zhu, and Junliang Tao. "Effect of Microbial-Induced Calcite Precipitation on Surface Erosion and Scour of Granular Soils." Transportation Research Record: Journal of the Transportation Research Board 2657, no. 1 (January 2017): 10–18. http://dx.doi.org/10.3141/2657-02.

Full text
Abstract:
Erosion is relevant to a variety of infrastructure problems such as bridge scour, roadway shoulder erosion, coastal erosion, and riverbank and slope stability. This research investigated the feasibility of using microbial-induced calcite precipitation (MICP) as an erosion countermeasure. MICP is a natural phenomenon in which calcite precipitation occurs as a consequence of microbial metabolic activity. The precipitated calcite modifies the soil fabric and provides an additional bonding force between soil particles. In this paper, a preliminary experimental study on the erosional behavior of MICP-treated sand is presented. A standard soil, Ottawa graded sand, was treated with a bacterium (Sporosarcina pasteurii) in a full-contact reactor-one in which the soil in a fabric mold was fully immersed in the bacteria and cementation solution. The morphologies and crystalline structures of the precipitated calcite in porous sediments were characterized using microscopic imaging techniques. The treated soil samples were tested in a flume to investigate the erosional behavior; both surface erosion and bridge scour tests were conducted. Although the untreated soil is highly erodible, the erosion of the treated sand was found to be negligible under the circumstances of the test; however, some concerns were raised regarding practical applications. Efforts will be made in the future to identify alternative treatment procedures that are more applicable to the field.
APA, Harvard, Vancouver, ISO, and other styles
8

Richardson, Alan, Kathryn A. Coventry, Alan M. Forster, and Chris Jamison. "Surface consolidation of natural stone materials using microbial induced calcite precipitation." Structural Survey 32, no. 3 (July 8, 2014): 265–78. http://dx.doi.org/10.1108/ss-07-2013-0028.

Full text
Abstract:
Purpose – Deterioration in natural stone is associated with many decay mechanisms and often the inherent composition of the materials themselves. Sandstone varies considerably but they all require a cementing matrix to bind amongst others, the silica (SiO2) particles together (Reading, 1989). In calcareous sandstones and limestones this binding matrix is principally calcium carbonate based (Muir, 2006; Reading, 1989; McMillan et al., 1999) in the form of calcite (CaCO3). Friable sandstone substrates and stones suffering from “surface dissolution” or disaggregation (Muir, 2006; Smith et al., 1992) have been traditionally consolidated utilising a host of chemical compounds that had, in many cases negative effects on their long-term performance (Muir, 2006). A principle issue amongst many was moisture entrapment and irreversibility of the consolidants adopted. The paper aims to discuss these issues. Design/methodology/approach – This paper investigates the effect of microbial induced calcite precipitation (MICP) as a natural treatment for the conservation of historic natural stone substrates. Sporosarcina pasteurii has been proven as a bacterium that can perform MICP effectively in extreme conditions making it the preferred bacterium for the MICP process within this study. Surface treatment experiments were analysed by measuring the mass increase and surface changes using scanning electron microscopy (SEM). Findings – The surface treatments showed a noticeable mass increase and observable deposition when viewed using a SEM microscope. Bio cementation of loose sand particles was observed and the degree of cementation was determined using a Moh's hardness test. Research limitations/implications – Recommendations for further work to improve this study are: use an increased Sporosarcina pasteurii cell optical density which would provide a greater calcite output. Carry out a paired comparison initial surface absorption test (BS 1881: Part 208, 1996 or ASTM C 1585-04, 2004). To be carried out on untreated control and MICP samples which would determine the pore blocking effect and surface repair capability of the treated samples. Practical implications – A method for obtaining optimal results in terms of surface treatment would involve reducing the time between mixing and application, this would require having the two reaction constituents mixed only seconds before use. Using a late mix spray application system has the potential to allow the two mixtures to combine in the spray nozzle whilst exiting the apparatus. Originality/value – This paper investigates a safe, natural process for stone repair.
APA, Harvard, Vancouver, ISO, and other styles
9

Peng, Shuquan, Kejia Zhang, Ling Fan, Jingyu Kang, Kang Peng, and Fan Wang. "Permeability Reduction and Electrochemical Impedance of Fractured Rock Grouted by Microbial-Induced Calcite Precipitation." Geofluids 2020 (December 7, 2020): 1–11. http://dx.doi.org/10.1155/2020/8876400.

Full text
Abstract:
The poor impermeability of fractured rock induced by excavation and construction is improved through the application of microbial-induced calcite precipitation (MICP), but it is difficult to monitor and evaluate the permeability reduction under a confining pressure and fracture aperture. For this, the grouting ratio, permeability, and electrochemical impedance of fractured rock with MICP grouting were experimented with, considering the effects of fracture aperture and confining pressure. The equivalent circuit model of grouting-fractured rock is presented, and the corresponding ratio of the electrical resistivity and cross-sectional area of the grouted fracture ( ρ / S ) is indicated by an electrochemical impedance spectroscope (EIS). The relationships of the permeability coefficient, the ρ / S , and the grouting ratio are analysed. The experimental results show that the Darcy permeability coefficient of fractured rock with MICP grouting is reduced by an order of magnitude of 3 to 4. As fracture aperture ranged from 1.28 to 2.56 mm and grouting rate was 0.003 ml/s, the Darcy permeability coefficient decreased with an increase in confining pressure. The grouting ratio and fracture aperture also decreased with a reduction in ρ / S . The results also showed that the permeability reduction of MICP correspondingly increased in these conditions. What is more, the Darcy permeability coefficient of fractured rock grouted by MICP and its permeability reduction may be well predicted by confining pressure and ρ / S . This study provides a new EIS method for predicting the reduction in permeability of MICP grouting-fractured rock and further enriches the application of MICP and EIS techniques in impermeable rock engineering.
APA, Harvard, Vancouver, ISO, and other styles
10

Song, Chenpeng, and Derek Elsworth. "Microbially Induced Calcium Carbonate Plugging for Enhanced Oil Recovery." Geofluids 2020 (July 2, 2020): 1–10. http://dx.doi.org/10.1155/2020/5921789.

Full text
Abstract:
Plugging high-permeability zones within oil reservoirs is a straightforward approach to enhance oil recovery by diverting waterflooding fluids through the lower-permeability oil-saturated zones and thereby increase hydrocarbon displacement by improvements in sweep efficiency. Sporosarcina pasteurii (ATCC 11859) is a nitrogen-circulating bacterium capable of precipitating calcium carbonate given a calcium ion source and urea. This microbially induced carbonate precipitation (MICP) is able to infill the pore spaces of the porous medium and thus can act as a potential microbial plugging agent for enhancing sweep efficiency. The following explores the microscopic characteristics of MICP-plugging and its effectiveness in permeability reduction. We fabricate artificial rock cores composed of Ottawa sand with three separate grain-size fractions which represent large (40/60 mesh sand), intermediate (60/80 mesh sand), and small (80/120 mesh sand) pore sizes. The results indicate a significant reduction in permeability after only short periods of MICP treatment. Specifically, after eight cycles of microbial treatment (about four days), the permeability for the artificial cores representing large, intermediate, and small pore size maximally drop to 47%, 32%, and 16% of individual initial permeabilities. X-ray diffraction (XRD) indicates that most of the generated calcium carbonate crystals occur as vaterite with only a small amount of calcite. Imaging by SEM indicates that the pore wall is coated by a calcium carbonate film with crystals of vaterite and calcite scattered on the pore wall and acting to effectively plug the pore space. The distribution pattern and morphology of microbially mediated CaCO3 indicate that MICP has a higher efficiency in plugging pores compared with extracellular polymeric substances (EPSs) which are currently the primary microbial plugging agent used to enhance sweep efficiency.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Microbial induced calcite precipitation (micp)"

1

Fuller, Jacob. "Strength Property Variability in Microbial Induced Calcite Precipitation Soils." UNF Digital Commons, 2017. https://digitalcommons.unf.edu/etd/773.

Full text
Abstract:
Microbial Induced Calcite Precipitation (MICP) is an attractive alternative for a variety geotechnical ground improvement practices commonly used today and has a variety of potential applications. This research focuses primarily on its use as a soil stabilization technique using the bacteria Sporosarcina Pasteurii and a single injection point percolation method adapted from previous research in granular soils. This method, and most published data, show an inherent variability in both physical and engineering properties due to the distribution of precipitated calcite within the specimen. The focus of this research is on the quantification of the variability in shear strength parameters induced by MICP treatment in sand. Also, on the initial development of a new treatment method which aims to reduce this inherent variability and offer a more feasible option for field applications. The MICP treated soil columns were sampled at constant intervals from the injection point and then subject to direct shear testing (DST) and calcite distribution analysis. This analysis reiterates previously documented reduction in cementation as distance from injection point increases. The reduction in cementation results in reduced shear strength parameter improvements. This research also concluded a minimum of two percent mass of calcite per total mass of treated soil for significant strength improvements.
APA, Harvard, Vancouver, ISO, and other styles
2

Dawoud, Osama M. F. "The applicability of microbially induced calcite precipitation (MICP) for soil treatment." Thesis, University of Cambridge, 2016. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.709509.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Davies, Matthew P. "Soil Improvement Using Microbial Induced Calcite Precipitation and Surfactant Induced Soil Strengthening." UNF Digital Commons, 2018. https://digitalcommons.unf.edu/etd/837.

Full text
Abstract:
Microbially induced calcite precipitation (MICP) has been used for a number of years as a technique for the improvement of various geological materials. MICP has been used in a limited capacity in organic rich soils with varying degrees of success. Investigators hypothesized that microbially-induced cementation could be improved in organic soils by using a surfactant. Varying amounts of Sodium Dodecyl Sulfate (SDS) were added to soils of varying organic content and a mixing procedure was used to treat these soils via MICP. Treated specimens were tested for unconfined compressive strength (UCS). Results appeared to show direct relationships between SDS content and treated specimen strength although significant variability was present in the data. In addition, results also indicated that while addition of SDS during MICP treatment strengthens soil, the strengthening is likely from the formation of a calcium dodecyl sulfate (CDS) complex in which the CDS surrounds the soil in a matrix, and formation of MICP-induced calcite has very little to do with overall soil performance. As such, a new method for stabilizing loose soils dubbed ‘Surfactant-induced soil stabilization’ (SISS) was further explored by treating additional soil specimens. Samples treated using this technique showed increases in strength when compared to untreated specimens. In addition, preliminary data indicated that SISS treated specimens were insoluble. The SISS technique presents a number of advantages when compared to traditional soil stabilization techniques. In particular it should be relatively low-cost and simple to administer since its only components are SDS and calcium chloride. Additionally, these constituents are relatively more sustainable than chemicals associated with more-traditional loose soil stabilization techniques.
APA, Harvard, Vancouver, ISO, and other styles
4

Wang, Yuze. "Microbial-Induced Calcium Carbonate Precipitation : from micro to macro scale." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/288238.

Full text
Abstract:
Microbial-Induced Calcium Carbonate (CaCO3) Precipitation (MICP) is a biological process in which microbial activities alter the surrounding aqueous environment and induce CaCO3 precipitation. Because the formed CaCO3 crystals can bond soil particles and improve the mechanical properties of soils such as strength, MICP has been explored for potential engineering applications such as soil stabilisation. However, it has been difficult to control and predict the properties of CaCO3 precipitates, thus making it very challenging to achieve homogeneous MICP-treated soils with the desired mechanical properties. This PhD study investigates MICP at both micro and macro scales to improve the micro-scale understandings of MICP which can be applied at the macro-scale for improving the homogeneity and mechanical properties of MICP-treated sand. A microfluidic chip which models a sandy soil matrix was designed and fabricated to investigate the micro-scale fundamentals of MICP. The first important finding was that, during MICP processes, phase transformation of CaCO3 can occur, which results in smaller and less stable CaCO3 crystals dissolving at the expense of growth of larger and more stable CaCO3 crystals. In addition, it was found that bacteria can aggregate after being mixed with cementation solution, and both bacterial density and the concentration of cementation solution affect the size of aggregates, which may consequently affect the transport and distribution of bacteria in a soil matrix. Furthermore, bacterial density was found to have a profound effect on both the growth kinetics and characteristics of CaCO3. A higher bacterial density resulted in a quicker formation of a larger amount of smaller crystals, whereas a lower bacterial density resulted in a slower formation of fewer but larger crystals. Based on the findings from micro-scale experiments, upscaling experiments were conducted on sandy soils to investigate the effect of injection interval on the strength of MICP treated soils and the effects of bacterial density and concentration of cementation solution on the uniformity of MICP treated soils. Increasing the interval between injections of cementation solution (from 4 h to 24 h) increased the average size of CaCO3 crystals and the resulting strength of MICP-treated sand. An optimised combination of bacterial density and cementation solution concentration resulted in a relative homogeneous distribution of CaCO3 content and suitable strength and stiffness of MICP-treated sand. This thesis study revealed that a microfluidic chip is a very useful tool to investigate the micro-scale fundamentals of MICP including the behaviour of bacteria and the process of CaCO3 precipitation. The optimised MICP protocols will be useful for improving the engineering performance of MICP-treated sandy soils such as uniformity and strength.
APA, Harvard, Vancouver, ISO, and other styles
5

Ouedraogo, Colette, and 魏可兒. "Microbial Induced Calcite Precipitation (MICP) on Taipei Silty Clay." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/ccr43s.

Full text
Abstract:
碩士
國立臺灣科技大學
營建工程系
107
Microbial Induced Calcite Precipitation (MICP) is a new technique of improving the engineering properties of soil, a multidisciplinary technique that involves biology, chemistry and soil mechanics. This technique involves the hydrolysis of urea by urease bacteria enzyme into carbonate ions and ammonium ions that precipitate in form of calcite in presence of calcium source. The calcite precipitate in the pore space of soil sample, where they can move and find oxygen for their activity, at particle-to-particle contact. However, the pore space of soil varied with the type of soil. The pore space in coarse-grained soil are greater than pore space in fine-grained-soil. Therefore, the application of MICP in fine-grained soil is limited. The limitation of MICP application in fine-grained soil was studied in this research with Taipei silty soil. MICP method was successively applied on Taipei silty using two method, namely mixing method and injection method. The unconfined compressive strength test and the electronic cone penetrometer test was used to indicate the improvement of soil shear strength for mixing method and injection method, respectively. An increase of two fold of the shear strength of Taipei silty clay from both method was achieved. Prior to the mixing method and the injection method, the ability of Sporosarcina pasteurii, used in this study, was investigated. High concentration of S. pasteurii inside growing medium promotes high urease activity. Soil improvement by natural (coir) fiber was also studied in this research. It shows the strength of the soil increases with the addition of fiber up to 1%. However, MICP gives better result on soil improvement compare to natural fiber. A combination of the two method was attempted. However, MICP application give better response to soil improvement than the combination of fiber and MICP.
APA, Harvard, Vancouver, ISO, and other styles
6

"Applications of Enzyme Induced Carbonate Precipitation (EICP) for Soil Improvement." Doctoral diss., 2015. http://hdl.handle.net/2286/R.I.27573.

Full text
Abstract:
abstract: In enzyme induced carbonate precipitation (EICP), calcium carbonate (CaCO3) precipitation is catalyzed by plant-derived urease enzyme. In EICP, urea hydrolyzes into ammonia and inorganic carbon, altering geochemical conditions in a manner that promotes carbonate mineral precipitation. The calcium source in this process comes from calcium chloride (CaCl2) in aqueous solution. Research work conducted for this dissertation has demonstrated that EICP can be employed for a variety of geotechnical purposes, including mass soil stabilization, columnar soil stabilization, and stabilization of erodible surficial soils. The research presented herein also shows that the optimal ratio of urea to CaCl2 at ionic strengths of less than 1 molar is approximately 1.75:1. EICP solutions of very high initial ionic strength (i.e. 6 M) as well as high urea concentrations (> 2 M) resulted in enzyme precipitation (salting-out) which hindered carbonate precipitation. In addition, the production of NH4+ may also result in enzyme precipitation. However, enzyme precipitation appeared to be reversible to some extent. Mass soil stabilization was demonstrated via percolation and mix-and-compact methods using coarse silica sand (Ottawa 20-30) and medium-fine silica sand (F-60) to produce cemented soil specimens whose strength improvement correlated with CaCO3 content, independent of the method employed to prepare the specimen. Columnar stabilization, i.e. creating columns of soil cemented by carbonate precipitation, using Ottawa 20-30, F-60, and native AZ soil was demonstrated at several scales beginning with small columns (102-mm diameter) and culminating in a 1-m3 soil-filled box. Wind tunnel tests demonstrated that surficial soil stabilization equivalent to that provided by thoroughly wetting the soil can be achieved through a topically-applied solution of CaCl2, urea, and the urease enzyme. The topically applied solution was shown to form an erosion-resistant CaCO3 crust on fine sand and silty soils. Cementation of erodible surficial soils was also achieved via EICP by including a biodegradable hydrogel in the stabilization solution. A dilute hydrogel solution extended the time frame over which the precipitation reaction could occur and provided improved spatial control of the EICP solution.
Dissertation/Thesis
Doctoral Dissertation Civil and Environmental Engineering 2015
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Microbial induced calcite precipitation (micp)"

1

Cheng, Liang, and Mohamed A. Shahin. "Microbially Induced Calcite Precipitation (MICP) for Soil Stabilization." In Ecological Wisdom Inspired Restoration Engineering, 47–68. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0149-0_3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Wang, Yang, Hanlong Liu, Zhichao Zhang, Peng Xiao, Xiang He, and Yang Xiao. "Study on Low-Strength Biocemented Sands Using a Temperature-Controlled MICP (Microbially Induced Calcite Precipitation) Method." In Sustainable Civil Infrastructures, 15–26. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95771-5_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Waldschmidt, Jean-Baptiste, and Benoît Courcelles. "Influence of Resting Periods on the Efficiency of Microbially Induced Calcite Precipitation (MICP) in Non-saturated Conditions." In Advancements in Unsaturated Soil Mechanics, 119–26. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-34206-7_9.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Teng, Fuchen, and Shao-Chi Chien. "Improvement of Fine Soils Through Microbial-Induced Calcite Precipitation." In Advanced Research on Shallow Foundations, 136–50. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01923-5_11.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Bu, Changming, Qian Dong, Kejun Wen, and Lin Li. "Development of Innovative Bio-beam Using Microbial Induced Calcite Precipitation Technology." In Proceedings of GeoShanghai 2018 International Conference: Geoenvironment and Geohazard, 491–98. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-0128-5_54.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Chittoori, Bhaskar, and Sikha Neupane. "Evaluating the Application of Microbial Induced Calcite Precipitation Technique to Stabilize Expansive Soils." In Tunneling in Soft Ground, Ground Conditioning and Modification Techniques, 10–19. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-95783-8_2.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Haouzi, Fatima-Zahra, Annette Esnault-Filet, and Benoît Courcelles. "Performance Studies of Microbial Induced Calcite Precipitation to Prevent the Erosion of Internally Unstable Granular Soils." In Advancements on Sustainable Civil Infrastructures, 37–49. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-96241-2_4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Clarà, A. "Experimental optimization of Microbially Induced Calcite Precipitation (MICP) for contact erosion control in earth dams." In Scour and Erosion IX, 43–50. Taylor & Francis, 2018. http://dx.doi.org/10.1201/9780429020940-10.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

MONTOYA, B. M., J. T. DEJONG, and R. W. BOULANGER. "Dynamic response of liquefiable sand improved by microbial-induced calcite precipitation." In Bio- and Chemo-Mechanical Processes in Geotechnical Engineering, 125–35. ICE Publishing, 2014. http://dx.doi.org/10.1680/bcmpge.60531.012.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Microbial induced calcite precipitation (micp)"

1

Dawoud, O., C. Y. Chen, and K. Soga. "Microbial-Induced Calcite Precipitation (MICP) Using Surfactants." In Geo-Congress 2014. Reston, VA: American Society of Civil Engineers, 2014. http://dx.doi.org/10.1061/9780784413272.160.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Lin, Hai, Muhannad T. Suleiman, Jeffery Helm, and Derick G. Brown. "Measurement of Bonding Strength between Glass Beads Treated by Microbial-Induced Calcite Precipitation (MICP)." In Geo-Congress 2014. Reston, VA: American Society of Civil Engineers, 2014. http://dx.doi.org/10.1061/9780784413272.159.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Lee, Minyong, Michael G. Gomez, Maya El Kortbawi, and Katerina Ziotopoulou. "Examining the Liquefaction Resistance of Lightly Cemented Sands Using Microbially Induced Calcite Precipitation (MICP)." In Geo-Congress 2020. Reston, VA: American Society of Civil Engineers, 2020. http://dx.doi.org/10.1061/9780784482834.007.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Montoya, B. M., J. T. DeJong, Ross W. Boulanger, Dan W. Wilson, Ray Gerhard, Anatoliy Ganchenko, and Jui-Ching Chou. "Liquefaction Mitigation Using Microbial Induced Calcite Precipitation." In GeoCongress 2012. Reston, VA: American Society of Civil Engineers, 2012. http://dx.doi.org/10.1061/9780784412121.197.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Dawoud, O., C. Y. Chen, and K. Soga. "Microbial Induced Calcite Precipitation for Geotechnical and Environmental Applications." In Geo-Shanghai 2014. Reston, VA: American Society of Civil Engineers, 2014. http://dx.doi.org/10.1061/9780784413456.002.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Shanahan, C., and B. M. Montoya. "Strengthening Coastal Sand Dunes Using Microbial-Induced Calcite Precipitation." In Geo-Congress 2014. Reston, VA: American Society of Civil Engineers, 2014. http://dx.doi.org/10.1061/9780784413272.165.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Velpuri, Naga Venkata P., Xinbao Yu, Hae-In Lee, and Woo-Suk Chang. "Influence Factors for Microbial-Induced Calcite Precipitation in Sands." In Fourth Geo-China International Conference. Reston, VA: American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784480069.006.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Phang, I. R. K., K. S. Wong, Y. S. Chan, and S. Y. Lau. "Effect of microbial-induced calcite precipitation towards tropical organic soil." In ADVANCES IN CIVIL ENGINEERING AND SCIENCE TECHNOLOGY. Author(s), 2018. http://dx.doi.org/10.1063/1.5062637.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Guo, Yuan, Mark Loria, Kurt Rhoades, and Xiong (Bill) Yu. "Effects of Microbial Induced Calcite Precipitation on Bentonite Cracking Remediation." In IFCEE 2018. Reston, VA: American Society of Civil Engineers, 2018. http://dx.doi.org/10.1061/9780784481592.014.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Shanahan, Casey, and Brina M. Montoya. "Erosion Reduction of Coastal Sands Using Microbial Induced Calcite Precipitation." In Geo-Chicago 2016. Reston, VA: American Society of Civil Engineers, 2016. http://dx.doi.org/10.1061/9780784480120.006.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Microbial induced calcite precipitation (micp)' for particular source types:
Journal articles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography