Fixation and distribution of bacterial activity in sand to induce carbonate precipitation for ground reinforcement

Harkes, Marien P.; Paassen, Leon A. van; Booster, Jacco L.; Whiffin, Victoria S.; Loosdrecht, M.C.M. van

doi:10.1016/j.ecoleng.2009.01.004

Cited by 616 publications

(299 citation statements)

References 21 publications

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“…As determined in Whiffin (2004), this corresponds to 4.26 × 10 −5 kmol-urea/m 3 /s. In order to immobilize the micro-organisms in the column for use in subsequent cementation, the injection of micro-organisms was followed by 5.99 l of 0.050 kmol/m 3 calcium chloride solution, as proposed in Harkes et al (2010). The flow rate was again 0.35 l/h.…”

Section: Methodsmentioning

confidence: 99%

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A Reactive Transport Model for Biogrout Compared to Experimental Data

et al. 2015

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Biogrout is a method for reinforcement of granular soil. In the Biogrout process, calcium carbonate is produced. This solid connects the grains, and therefore the strength of the soil is increased. The calcium carbonate is formed with the use of micro-organisms. Experiments and numerical simulations have been performed to demonstrate the process under various conditions. In this paper, it has been examined whether a reactive transport model can be used to describe a Biogrout experiment that was performed in a column with a length of 5 m. Four different models for the course of the reaction rate are considered. The concentration of micro-organisms and the reaction rate are fine-tuned in order to find a description of the experiment that is a best fit for the particular model. This is done by minimizing the error between the experimental and numerical results for the concentration of calcium carbonate and the by-product of the reaction. List of symbolsInjected concentration of micro-organisms (normalized) (1) S bac Ratio of micro-organisms that is fixated (with respect to the injected concentration) (1)

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Section: Methodsmentioning

confidence: 99%

“…It has been assumed that the rate is proportional to the number of micro-organisms per unit of volume. According to Harkes et al (2010), the fixation procedure that was used in this experiment leads to a rather homogeneous distribution of micro-organisms. Hence, for the moment a homogeneous distribution of micro-organisms is used.…”

Section: Micro-organismsmentioning

confidence: 99%

A Reactive Transport Model for Biogrout Compared to Experimental Data

et al. 2015

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“…Bioclogging could occur when bacteria are adsorbed or strained by the solid grains, resulting a heterogeneous CaCO 3 precipitation in the soil (Mitchell and Santamarina 2005). Previous research of biogrouting investigated the improvement of coarse grain soils (Whiffin 2004;De Jong et al 2006;Whiffin et al 2007;Ivanov and Chu 2008;Harkes et al 2010;Van Paassen et al 2009. As the permeability of coarse soil is high, passing the bacteria through the soil is possible.…”

Section: Introductionmentioning

confidence: 99%

Electrokinetic Stabilization of Soft Soil Using Carbonate-Producing Bacteria

2014

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The carbonate (CO 3 -2 ) produced by Sporosarcina pasteurii was injected electrokinetically to enhance the mechanical properties of soft clay soils. In this method the Ca 2? was injected into the anode chamber and moved towards the cathode by electromigration and electroosmotic flow. Then the released CO 3 -2 from a blend of bacteria and urea was injected into the cathode chamber. The CO 3 -2 ions were moved from the cathode to the anode under electromigration mechanism. The CaCO 3 was precipitated in the presence of calcium in porous medium of the soil, and consequently increased the shear strength of the soil. The polarity reversal was applied to have a homogeneous distribution of CaCO 3 .

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“…The bacterial degradation of urea locally increases the pH and promotes the microbial deposition of calcium carbonate in a calcium rich environment. In the presence of dissolved calcium ions, the produced carbonate ions precipitate and form calcium carbonate crystals [18]. Microbial mineral precipitation technologies have been successfully demonstrated for consolidation of sand columns, repair of limestone monuments, and to some extent for remediation of cracks in concrete [19].…”

Section: Bacteriamentioning

confidence: 99%

A Review on Interlocking Compressed Earth Blocks (ICEB) with Addition of Bacteria

Irwan

Zamer

Othman

2016

MATEC Web of Conferences

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Abstract. Interlocking Compressed Earth Block (ICEB) are cement stabilized soil blocks that allow for dry stacked construction. Because of this characteristic, the process of building walls is faster and requires less skilled labour as the blocks are laid dry and lock into place. However there are plenty room for improving the interlocking blocks by increase its durability. Durability of bricks are affected by several factors and one of them are water absorption. High water absorption level will results in low durability. Many studies have been conducted in order to improve the durability of bricks by using environmentally method. One of the method is by inducing bacteria into bricks. Bacteria in brick induced calcite precipitation (calcite crystals) to cover the cracks continuously. Therefore, the issues of durability of bricks can be fully solved. This paper offer a review on interlocking compressed earth blocks and the use of bacteria in reducing water absorption level.

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Fixation and distribution of bacterial activity in sand to induce carbonate precipitation for ground reinforcement

Cited by 616 publications

References 21 publications

A Reactive Transport Model for Biogrout Compared to Experimental Data

A Reactive Transport Model for Biogrout Compared to Experimental Data

Electrokinetic Stabilization of Soft Soil Using Carbonate-Producing Bacteria

A Review on Interlocking Compressed Earth Blocks (ICEB) with Addition of Bacteria

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