Microbial CaCO3 Precipitation
For the Production of Biocement
(Sprache: Englisch)
The hydrolysis of urea by the widely distributed enzyme urease is special in that it is one of the few biologically occurring reactions that can generate carbonate ions without an associated production of protons. When this hydrolysis occurs in a...
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The hydrolysis of urea by the widely distributed enzyme urease is special in that it is one of the few biologically occurring reactions that can generate carbonate ions without an associated production of protons. When this hydrolysis occurs in a calcium-rich environment, calcite (calcium carbonate) precipitates from solution forming a solid-crystalline material. The binding strength of the precipitated crystals is highly dependent on the rate of carbonate formation and under suitable conditions it is possible to control the reaction to generate hard binding calcite cement (or Biocement). The objective of this thesis was to develop an industrially suitable cost-effective microbial process for the production of urease active cells and investigate the potential for urease active cells to act as a catalyst for the production of Biocement.Several trials were conducted with unconsolidated sand and significant improvements in both shear strength (up to 1.8 MPa) and stiffness (up to 250MPa) were achieved with a few days of treatment. Potential applications for the process are discussed.
Autoren-Porträt von Victoria Whiffin
Whiffin, VictoriaDr. Victoria Whiffin completed her PhD in 2003 and has since spent several years working on various biogeochemical reactions for civil engineering applications in the Netherlands. She recently returned to her homeland of Australia and specialises in applied environmental microbiology.
Bibliographische Angaben
- Autor: Victoria Whiffin
- 2008, 168 Seiten, Maße: 15,1 x 21,9 cm, Kartoniert (TB), Englisch
- Verlag: VDM Verlag Dr. Müller e.K.
- ISBN-10: 363903872X
- ISBN-13: 9783639038729
Sprache:
Englisch
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