Experiment Research from Macro to Micro on Microbial-Induced Clogging by Adding Potato Soup in Beijing Sand Column
Publication: Geo-Frontiers 2011: Advances in Geotechnical Engineering
Abstract
Microbial-induced clogging is a method of leakage repair, a very important and promising application of biological technology in civil engineering. Metabolism and reproduction of microorganisms original in the soil become intensive after nutrients are supplied, and finally the hydraulic conductivity of the soil is decreased. 3 sand-column experiments by adding potato soup, glucose and water respectively on Beijing sand were performed in 2009. Like Nutrolase in Dutch Pleistocene soil and Japanese alluvial sand, potato soup can decrease the hydraulic conductivity of Beijing sand, but glucose can't. By ESEM and CT, the microstructures of the soil near the leakage are found to be different in columns added potato soup and water. The quantity of microorganisms and the loss of ignition of soil samples located in different position of sand columns are different. Contents of different Fe in soil samples of sand column supplied with potato soup have a significant increase. By XRD, the mineral compositions of soil samples near the leakage showed no significant difference with the initial sand sample. The results showed that the production of organics during the experiment was a main cause of microbial-induced clogging in Beijing sand column.
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© 2011 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Agriculture
- Crops
- Environmental engineering
- Geomechanics
- Geotechnical engineering
- Hydraulic conductivity
- Hydrologic engineering
- Hydrology
- Irrigation engineering
- Microbes
- Organisms
- Sand (hydraulic)
- Sandy soils
- Soil analysis
- Soil mechanics
- Soil properties
- Soil water
- Soils (by type)
- Water and water resources
- Water leakage and water loss
- Water management
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