On possibility of improvement of compacted silty soils using biodeposition method

Grabiec, Anna M.; Starzyk, Justyna; Stefaniak, Katarzyna; Wierzbicki, J.; Zawal, Daniel

doi:10.1016/j.conbuildmat.2017.01.071

Cited by 26 publications

(9 citation statements)

References 23 publications

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“…Grabiec et al . [35] mixed Sporosarcina pasteurii in silty soils to make cylinder samples. They found that soil shear strength and rigidity increased while soil deformation under stress reduced after the MICP process.…”

Section: Hcomentioning

confidence: 99%

Insights into the Current Trends in the Utilization of Bacteria for Microbially Induced Calcium Carbonate Precipitation

et al. 2020

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Nowadays, microbially induced calcium carbonate precipitation (MICP) has received great attention for its potential in construction and geotechnical applications. This technique has been used in biocementation of sand, consolidation of soil, production of self-healing concrete or mortar, and removal of heavy metal ions from water. The products of MICP often have enhanced strength, durability, and self-healing ability. Utilization of the MICP technique can also increase sustainability, especially in the construction industry where a huge portion of the materials used is not sustainable. The presence of bacteria is essential for MICP to occur. Bacteria promote the conversion of suitable compounds into carbonate ions, change the microenvironment to favor precipitation of calcium carbonate, and act as precipitation sites for calcium carbonate crystals. Many bacteria have been discovered and tested for MICP potential. This paper reviews the bacteria used for MICP in some of the most recent studies. Bacteria that can cause MICP include ureolytic bacteria, non-ureolytic bacteria, cyanobacteria, nitrate reducing bacteria, and sulfate reducing bacteria. The most studied bacterium for MICP over the years is Sporosarcina pasteurii. Other bacteria from Bacillus species are also frequently investigated. Several factors that affect MICP performance are bacterial strain, bacterial concentration, nutrient concentration, calcium source concentration, addition of other substances, and methods to distribute bacteria. Several suggestions for future studies such as CO2 sequestration through MICP, cost reduction by using plant or animal wastes as media, and genetic modification of bacteria to enhance MICP have been put forward.

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Section: Hcomentioning

confidence: 99%

Insights into the Current Trends in the Utilization of Bacteria for Microbially Induced Calcium Carbonate Precipitation

et al. 2020

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“…with or without urea) have successfully monitored the cell density or concentration using turbidity measurements [77,[79][80][81]. Moreover, the colony count method is also often used to monitor the growth behaviour of MICP microorganisms [82][83][84].…”

Section: Urease Activitymentioning

confidence: 99%

Bioprecipitation of calcium carbonate mediated by ureolysis: A review

Omoregie

Palombo

Nissom

2020

Environmental Engineering Research

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Ureolysis-driven microbially induced carbonate precipitation (MICP) is a naturally occurring process facilitated through microbial activities and biogeochemical reactions to produce calcium carbonate (CaCO 3) mineral. MICP serves as an alternative ground improvement binder method to conventional technologies which is sustainable, requires low energy for its treatment process, results in a minimal carbon footprint and could offer economic benefits. In the last two decades, MICP has drawn great interest from the scientific community because of its practicality to stabilize granular soils, repair concrete cracks and remediate heavy metals. To obtain successful MICP application, it is vital to understand the conditions that favor its process. This paper, therefore, provides an overview of literature on CaCO 3 precipitation mediated by ureolysis-driven MICP and its mechanism. The review includes a discussion on sources of urease enzyme from microorganisms used to induce CaCO 3 crystal formation required for implementation of MCIP for ground improvement. Moreover, the key factors that influence the outcome of MICP and bio-engineering testing methods typically used to evaluate MICP performance are also highlighted. Finally, this review also provides insight on the current drawbacks (i.e. ammonium production, scaleup bioprocess and treatment cost) affecting MICP technology and recommendations for future consideration.

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“…Low water content soil gained higher local strength compared to saturated one [28]. This is because of bacteria resistance to mechanical action is high enough to accumulate in the thin film of water around soil particles [57]. This forms CaCO 3 precipitation as a coating to soil particles for unsaturated samples due to water surface tension compared to scattered agglomerated rhombohedral crystals formation for saturated samples [13].…”

Section: Water Presencementioning

confidence: 99%

Properties of Biomineralization Process in Various Types of Soil and Their Limitations

Mousa*¹,

Nahazanan²,

Huat³

et al. 2019

IJEAT

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Weak and problematic soils affect stability and safety of structures founded on them. The problems occur due to limitation or absence of shear strength or over shear stress applied on the soil during loading which then lead to large settlement and consequently failure to the founded structures. Replacing the soil with better materials would be very costly as these types of soil are normally extended to a great depth under the ground surface. The proposed solution for such kind of soils is curing weak soils instead of replacing them. One of the proposed treatment methods is bio-grouting in which the conditions and the scales of the application differs according to the soil types and limitations. Reviews on previous researches have shown that treatment results by bio-grouting method are controlled by several factors, such as size of pores, value of pH, duration of treatment, presence of water and electro-kinetic effect, which give impact to treatment results quality and quantity. The outcome can go as far as killing the bacteria which then reduce the microbial growth if it was not controlled. Understanding of bio-grouting process and its application will help in improving the engineering properties of the weak soils and its applications.

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On possibility of improvement of compacted silty soils using biodeposition method

Cited by 26 publications

References 23 publications

Insights into the Current Trends in the Utilization of Bacteria for Microbially Induced Calcium Carbonate Precipitation

Insights into the Current Trends in the Utilization of Bacteria for Microbially Induced Calcium Carbonate Precipitation

Bioprecipitation of calcium carbonate mediated by ureolysis: A review

Properties of Biomineralization Process in Various Types of Soil and Their Limitations

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