Micaceous Soil Strength And Permeability Improvement Induced By Microbacteria From Vegetable Waste

Omar, Rohayu Che; Roslan, Rasyikin; Baharuddin, Intan Nor Zuliana; Hanafiah, Mohd

doi:10.1088/1757-899x/160/1/012083

Cited by 11 publications

(8 citation statements)

References 8 publications

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“…Omar et al [28] demonstrated the sustainable nature of employing MICP as a means of soil modification. In this technique, as opposed to the usual cultivation of one specific strain of a ureolytic bacterium, a "vege-grout" was created through the fermentation of agricultural waste, using a mixture of vegetables containing Cucumissativus, Ipomoea aquatic and Vigna unguiculata sesquipedalis.…”

Section: Micp Using Sporosarcina Pasteuriimentioning

confidence: 99%

The Reduction of the Permeability of a Lateritic Soil through the Application of Microbially Induced Calcite Precipitation

Smith¹,

Pritchard²,

Edmondson³

et al. 2017

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Lateritic soils are frequently utilised in tropical areas of the developing world as an engineering material in the construction of rural earth roads, usually in the form of engineered natural surface (ENS) roads. The heavy, seasonal rainfalls common to the tropics results in ENS roads becoming quickly saturated with rainwater, and no longer accessible to motorised transportation. Microbially induced calcite precipitation (MICP) has been successfully used as a treatment process to decrease the permeability of clean, cohesionless sands by studies trying to impede the movement of groundwater, and any pollutants they may contain. In order to see if MICP treatment can also reduce the susceptibility of ENS road lateritic soils to rainwater saturation, this study has treated a Brazilian sample extracted from an ENS road in Espirito do Santo, Brazil, using the MICP bacterium Sporosarcina pasteurii contained within a urea-calcium chloride solution inoculum. Investigation, by means of a Rowe cell, of the post-treatment permeability, to untreated control samples, has shown an average decrease in the vertical coefficient of permeability of 83%, from 1.15 × 10 −7 m/s for the untreated control samples, to 1.92 × 10 −8 m/s in treated samples.

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Section: Micp Using Sporosarcina Pasteuriimentioning

confidence: 99%

The Reduction of the Permeability of a Lateritic Soil through the Application of Microbially Induced Calcite Precipitation

Smith¹,

Pritchard²,

Edmondson³

et al. 2017

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“…Vege-grout was processed through previously described methods [18]. Vegetable waste such as cabbage, long bean, cucumber and spinach were collected from various sources like the wet market and farmer market around the area and brought back to the laboratory.…”

Section: Preparation Of Coating Mixturementioning

confidence: 99%

Study of Vege-Grout as Coating Material in Reducing Surface Temperature

Omar¹,

Taha

Roslan³

et al. 2019

GEOMATE

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Pavement is one of the main features in cities and urban areas that contribute to the Urban Heat Island (UHI) effect. The urban areas are more affected by this condition compared to the rural areas due to the extensive built environment and lack of vegetation cover. Many studies have reported that the shear strength of sandy soil was improved by using the microbial-induced calcite precipitation method and most of the experimental work on microbial cementation utilized cultivated culture of ureolytic bacteria for calcium carbonate formation. However, our previous study has demonstrated that vege-grout from vegetable waste can also induce bio-cementation due to the presence of microbial activity in the vege-grout. Following this, the study has been expanded to investigate the feasibility of bio-cementation from vege-grout as a coating material to reduce surface temperature. A mixture of the coating was developed using vege-grout as the main composition. The mixture was then applied on the surface of the interlocking paver and left to cure at room temperature for seven days. Surface temperature was measured using an infrared thermometer and thermographic camera. Results showed that the surface temperature of vege-grout coated paver was reduced by 4-5 o C compared to that of control. The outcome of this study suggested that vege-grout has the potential to be explored as a component for coating material that can reduce surface temperature.

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“…The engineering properties, permeability, and shear strength have improved significantly due to the bio-clogging process activated by the indigenous bacteria in the liquid [14][15]. In continuation of our work on the effectiveness of bio-grout from vegetable waste, the objective of this laboratory study was to analyze the quantity of soil loss from bio-grout treated slope models under simulated rainfall condition and to investigate the evidence of bioclogging process by microbial activity.…”

Section: Introductionmentioning

confidence: 99%

Study of Bio-Grout Treated Slope Models Under Simulated Rainfall

Omar¹,

Taha

Roslan³

et al. 2018

GEOMATE

Self Cite

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Previous data reported that soil erosion in Malaysia was directly related to rainfall trends. This phenomenon could affect the overhead transmission towers which are at risk of collapsing due to slope failure. For soil stabilization, chemical grouting such as cement, lime and acrylamides were generally applied to enhance the physical properties of the soil. However, some of the chemical additives used in the grouting suspension may be toxic and hazardous to both humans and the environment. Thus, it is important to look for alternative grouting substances that are safe and sustainable. Recently, a new soil improvement technique based on carbonate precipitation by microbial activities from vegetable waste has been developed as biogrout. This study was aimed to investigate the effectiveness of bio-grout from the vegetable waste in reducing soil loss due to rainfall impact. Soil samples were collected from an eroded slope nearby a transmission line in Perak and molded into 45˚ slope models in a custom-made box. A simple rainfall simulation was performed on the untreated and treated soil samples mixed with bio-grout for 30 days. The results showed that the soil loss of treated samples has been significantly reduced from 34.6 g to 13.5 g. Scanning electron microscopy showed aggregated particles occupying the empty spaces of the treated soils. Evidence of bio-mediated microbial activity was indicated by the presence of microorganisms in the biogrout liquid. The bio-grout from vegetable waste proved to be an effective and eco-friendly new grouting material for soil erosion control.

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Micaceous Soil Strength And Permeability Improvement Induced By Microbacteria From Vegetable Waste

Cited by 11 publications

References 8 publications

The Reduction of the Permeability of a Lateritic Soil through the Application of Microbially Induced Calcite Precipitation

The Reduction of the Permeability of a Lateritic Soil through the Application of Microbially Induced Calcite Precipitation

Study of Vege-Grout as Coating Material in Reducing Surface Temperature

Study of Bio-Grout Treated Slope Models Under Simulated Rainfall

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