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Biological Clogging of Sand Columns
Faculty of Business Administration, Toyo University, Tokyo, Japan.
- 1 Faculty of Business Administration, Toyo University, Tokyo, Japan.
Open Journal of Soil Science·Volume 03 (2013)·Pages 148–152·Published 21 June 2013·DOI10.4236/ojss.2013.33017
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Abstract
Increased microbial activity leads to biological clogging (or bioclogging), i.e. , the pore space is clogged by microbes and saturated hydraulic conductivity of porous media decreases. A series of column experiments were carried out to study the bioclogging of sand columns. Hydraulic conductivity remained unchanged when a sterilizing agent was ap plied; however, it decreased when a glucose solution was applied. In most cases, bioclogging proceeded from the inlet of the solution; but, in some cases, it started from the bottom or outlet of the column. In this experiment, the reduction of hydraulic conductivity was better explained by microcolony models compared to biofilm models.
KeywordsBiocloggingBacteriaHydraulic ConductivityMicrobial Effect
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