CUED Publications database

Microbial-induced calcite precipitation (MICP) using surfactants

Dawoud, O and Chen, CY and Soga, K (2014) Microbial-induced calcite precipitation (MICP) using surfactants. In: UNSPECIFIED pp. 1635-1643..

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Abstract

Microbial-induced calcite precipitation (MICP) is an evolving technology for modifying engineering characteristics of the soil, including strength, stiffness, and permeability. However, application in the field is facing the difficulty of achieving uniform distribution of precipitated calcite, which questions the homogeneity and overall efficiency and limits the feasible scales of treatment. This lack of uniformity is mainly ascribed to the common distribution of the injected bacteria. To overcome the uniformity issue, the study described in this paper examines the effect of surfactants on the transport and distribution of the bacteria (Sporosarcina pasteurii) and on MICP efficiency and distribution. Batch tests are used to evaluate the effect of surfactants on the urease activity, while column tests are used to describe changes in attachment efficiency and bacterial distribution. A notable increase in MICP efficiency was noticed with surfactants in general. It was found that surfactants can be used to generate a remote localized MICP. © 2014 American Society of Civil Engineers.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:05
Last Modified: 31 Aug 2017 01:23
DOI: