Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Factors Affecting the Kinetics of Urea Hydrolysis via Sporoscarcina pasteurii
Microbial induced carbonate precipitation (MICP) is a bio-mediated approach to improve engineering properties of granular materials. Cell population, substrate concentration, alkalinity, and temperature are the main factors controlling urea hydrolysis rate in the MICP process. In this study, the effects of initial substrate (urea) concentration and cell population on the rate of urea hydrolysis were evaluated using electrical conductivity as a monitoring method. For this purpose, a correlation between electrical conductivity and hydrolyzed urea concentration was derived from a batch test program. Various initial substrate concentrations and cell populations were selected in another batch test program to evaluate their contribution to the urea hydrolysis rate. Increasing both initial substrate concentration and cell population accelerated the rate as discussed in detail in this paper. Finally, a simplified column testing program was completed to demonstrate the effectiveness of electrical conductivity as a monitoring parameter during MICP treatment.
Factors Affecting the Kinetics of Urea Hydrolysis via Sporoscarcina pasteurii
Microbial induced carbonate precipitation (MICP) is a bio-mediated approach to improve engineering properties of granular materials. Cell population, substrate concentration, alkalinity, and temperature are the main factors controlling urea hydrolysis rate in the MICP process. In this study, the effects of initial substrate (urea) concentration and cell population on the rate of urea hydrolysis were evaluated using electrical conductivity as a monitoring method. For this purpose, a correlation between electrical conductivity and hydrolyzed urea concentration was derived from a batch test program. Various initial substrate concentrations and cell populations were selected in another batch test program to evaluate their contribution to the urea hydrolysis rate. Increasing both initial substrate concentration and cell population accelerated the rate as discussed in detail in this paper. Finally, a simplified column testing program was completed to demonstrate the effectiveness of electrical conductivity as a monitoring parameter during MICP treatment.
Factors Affecting the Kinetics of Urea Hydrolysis via Sporoscarcina pasteurii
Safavizadeh, Shahin (Autor:in) / Montoya, Brina M. (Autor:in) / Gabr, Mohammed A. (Autor:in) / Knappe, Detlef R. U. (Autor:in)
Eighth International Conference on Case Histories in Geotechnical Engineering ; 2019 ; Philadelphia, Pennsylvania
Geo-Congress 2019 ; 105-114
21.03.2019
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Factors Affecting the Kinetics of Urea Hydrolysis via Sporoscarcina pasteurii
| British Library Conference Proceedings | 2019
Concrete crack remediation by polyurethane-immobilized bacillus pasteurii
| Tema Archiv | 2001
Biocalcification by Bacillus pasteurii urease: a novel application
| Tema Archiv | 2009