Biochar-assisted bio-cementation of a sand using native bacteria

Behzadipour, Hamed; Sadrekarimi, Abouzar

doi:10.1007/s10064-021-02235-0

Cited by 23 publications

(11 citation statements)

References 68 publications

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“…Preliminary tests show that the permeability coefficient of calcareous sand sample before cemented is about 10 −2 cm/s, after cemented by different cycles, the authors can observe from Fig. 9 that the permeability coefficient of the samples are down to 10 –4 cm/s, falling by two orders of magnitudes, this is consistent with previous researches 30 , 31 ,which illustrating that the Bacillus thuringiensis can also fill and cement coral sand particles well, and improve the permeability of the solidified body. In comparison, the permeability coefficient of the sample under 14 cementation times is more than 60% lower than that under 7 times.…”

Section: Resultssupporting

confidence: 90%

Biomineralization of coral sand by Bacillus thuringiensis isolated from a travertine cave

Xiao

Deng

2023

Sci Rep

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Travertine is a typical product of microbial mineralization in the nature and its mineral composition is mainly calcite and aragonite. In this paper, Bacillus thuringiensis, a kind of mineralize bacterium is extracted from the travertine crystal to cenment coral sand, and the reinforcement effect of microbial induced carbonate precipitation (MICP) technology on coral sand under different cementation times is studied. Firstly, the culture conditions are optimized in nine pairs of trials, including urea content, microbial inoculation, shaker speed and incubation time. Under the optimal culture conditions, the coral sand is cemented by soaking method. With the increase of reinforcement times, the permeability coefficient of the sand sample is reduced to 10−4 cm/s, and the shear strength is increased by more than 130%. Compared with Sporosarcina pasteurii, the cohesion and internal friction angle of the coral sand column cemented by Bacillus thuringiensis are increased by more than 50% and 10%, respectively. The area distribution of T2 spectrum shows that with the increase of the number of cementation, the amplitude of the main peak decreases, indicating that the large pores are better filled, the number of medium and small pores are also reduced, and the pore area is significantly reduced, with the amplitude of about 44%. The above experiments verified that microorganism in travertine could also be used in MICP technology, and even achieve better reinforcement effect. It also provides a new way and idea for the selection of mineralized bacteria by MICP technology.

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Section: Resultssupporting

confidence: 90%

Biomineralization of coral sand by Bacillus thuringiensis isolated from a travertine cave

Xiao

Deng

2023

Sci Rep

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“…They act as cohesive materials, binding soil particles and improving soil structure, leading to better aeration, water retention, and overall soil quality (Hossain et al, 2016;Saneiyan et al, 2019;Litardo et al, 2022). Additionally, the byproducts stimulate microbial-induced calcium precipitation, promoting the formation of stable soil aggregates (Nikseresht et al, 2020;Romano et al, 2020;Behzadipour and Sadrekarimi, 2021;Saneiyan et al, 2021). The application of vinasse has been associated with increased soil thermal conductivity, reduced soil bulk density, and increased soil porosity, all of which contribute to improved soil quality and plant growth (Place et al, 2008;Gutieŕrez et al, 2016;Eissa, 2017).…”

Section: The Influence Of Molasses and Vinasse On Soil Propertiesmentioning

confidence: 99%

Harnessing the potential of sugarcane-based liquid byproducts—molasses and spentwash (vinasse) for enhanced soil health and environmental quality. A systematic review

Stephen,

Shitindi,

Bura

et al. 2024

Front. Agron.

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Farming practices reliant solely on synthetic agrochemicals face unreliability in the current era marked by unpredictable climate changes and rapid soil health deterioration. Consequently, a shift towards sustainable approaches is imperative to ensure both food security and environmental quality. Molasses and vinasse, abundant organic liquid by-products from sugar processing and distillery industries respectively, have historically served as soil conditioners and biofertilizers. Despite their potential, their effectiveness as organic amendments remain relatively unknown globally. In response, we conducted a systematic literature review to unveil the benefits of molasses and vinasse as organic amendments. Our findings reveal that these by-products consist of both inorganic and organic compounds that enhance soil and aquatic ecosystem performance. These compounds include essential plant nutrients as mineral elements and organic matter, contributing to improved soil physico-chemical and biological properties. Notably, the application of molasses and vinasse in crop production has demonstrated superiority over chemical fertilizers, particularly when combined with other inorganic amendments. Molasses and vinasse have been reported to significantly increase yield in several crops including sugarcane (Saccharum officinarum), tomatoes (Solanum lycopersicum), soybean (Glycine max), maize (Zea mays) and rice (Oryza sativa). Strategic utilization of vinasse has the potential to enhance environmental quality by reducing soil heavy metal loads and mitigating negative impacts associated with synthetic fertilizers. However, it is crucial to note that irregular disposal or misuse of these by-products can result in detrimental effects on the environment and human health. To encourage sustainable utilization on a global scale, it is essential to establish appropriate dosages, raise awareness among farmers and stakeholders regarding judicious use, and develop effective methods for handling and application of molasses and vinasse. This approach ensures cost-effective and environmentally friendly organic amendments, fostering a harmonious balance between agricutural productivity and ecological well-being.

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“…Actually, the three stages mentioned above are commonly found in the direct shear behavior of sand cemented by carbonate precipitation, such as microbially induced carbonate precipitation (MICP) [ 45 , 46 , 47 ].…”

Section: Simplified Modelmentioning

confidence: 99%

A Simplified Model for Shear Behavior of Mortar Using Biomimetic Carbonate Precipitation

et al. 2023

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As a common molecule in biomineralization, L-aspartic acid (L-Asp) has been proven to be able to induce in vitro CaCO3 precipitation, but its application in sand reinforcement has never been studied. In this study, L-Asp was employed in sand reinforcement for the first time through the newly developed biomimetic carbonate precipitation (BCP) technique. Specimens with different number of BCP spray cycles were prepared, and a series of direct shear tests were conducted to investigate the impact of spray number on shear strength, critical displacement, and residual strength. Then a simplified power model for shear stress–displacement behavior was established and calibrated with the measured data. The results show that BCP can significantly improve the shear strength of sand. As the number of spray cycles increases, both the shear strength and residual strength increase, while the critical displacement decreases. Such variations can be described with two sigmoid models and a linear model, respectively. The simplified power model performs well in most cases, especially at higher spray numbers. This study is expected to provide a practical model for the shear behavior of BCP-treated mortar.

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Biochar-assisted bio-cementation of a sand using native bacteria

Cited by 23 publications

References 68 publications

Biomineralization of coral sand by Bacillus thuringiensis isolated from a travertine cave

Biomineralization of coral sand by Bacillus thuringiensis isolated from a travertine cave

Harnessing the potential of sugarcane-based liquid byproducts—molasses and spentwash (vinasse) for enhanced soil health and environmental quality. A systematic review

A Simplified Model for Shear Behavior of Mortar Using Biomimetic Carbonate Precipitation

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