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A platform for research: civil engineering, architecture and urbanism
Microbially Treated Lateritic Soil as a Landfill Liner Material
With the growing population and urbanization, there is huge hike in the amount of waste generated on earth. Landfilling is one of the most convenient methods for bulk disposal of waste generated by mankind. Landfill liners serve to prevent the contamination between the waste and the surrounding environment, especially groundwater during landfilling process. Landfill liners are usually made of geocomposites based on clayey soil. Previous studies reveal that bacteriological treatment on sandy soil has greater potential in geotechnical engineering applications, in terms of performance and environment sustainability. Lateritic soil with an appreciable amount of sand is abundantly found in Kerala. Therefore, the study was focussed on designing a new landfill liner material using lateritic soil amended by microbially induced calcium carbonate precipitation (MICP) method. As per the guidelines of environmental protection agency (EPA Annual Report in Environmental Protection Agency, USA, 2013 [5]), a soil liner is required to have a hydraulic conductivity below 1 × 10–7 cm/s. The effect of MICP treatment on hydraulic conductivity of the lateritic soil was investigated. Bacillus megaterium is chosen as the bacterium for triggering calcite precipitation in soil. The results show that MICP treatment reduces the hydraulic conductivity of lateritic soil by a considerable amount.
Microbially Treated Lateritic Soil as a Landfill Liner Material
With the growing population and urbanization, there is huge hike in the amount of waste generated on earth. Landfilling is one of the most convenient methods for bulk disposal of waste generated by mankind. Landfill liners serve to prevent the contamination between the waste and the surrounding environment, especially groundwater during landfilling process. Landfill liners are usually made of geocomposites based on clayey soil. Previous studies reveal that bacteriological treatment on sandy soil has greater potential in geotechnical engineering applications, in terms of performance and environment sustainability. Lateritic soil with an appreciable amount of sand is abundantly found in Kerala. Therefore, the study was focussed on designing a new landfill liner material using lateritic soil amended by microbially induced calcium carbonate precipitation (MICP) method. As per the guidelines of environmental protection agency (EPA Annual Report in Environmental Protection Agency, USA, 2013 [5]), a soil liner is required to have a hydraulic conductivity below 1 × 10–7 cm/s. The effect of MICP treatment on hydraulic conductivity of the lateritic soil was investigated. Bacillus megaterium is chosen as the bacterium for triggering calcite precipitation in soil. The results show that MICP treatment reduces the hydraulic conductivity of lateritic soil by a considerable amount.
Microbially Treated Lateritic Soil as a Landfill Liner Material
Lecture Notes in Civil Engineering
Satyanarayana Reddy, C. N. V. (editor) / Saride, Sireesh (editor) / Haldar, Sumanta (editor) / Kavya, K. S. (author) / Ajitha, A. R. (author)
2021-08-03
12 pages
Article/Chapter (Book)
Electronic Resource
English
Microbially Treated Lateritic Soil as a Landfill Liner Material
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