EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Innovative Approach for Addressing Coastal Erosion Protection Using Microbial Induced Carbonate Precipitation

Md Al Imran1, Kazunori Nakashima2, Niki Evelpidou3, and Satoru Kawasaki4
Md Al Imran et al.
  • 1Graduate School of Engineering, Hokkaido University, Japan (
  • 2Faculty of Engineering, Hokkaido University, Japan (
  • 3Faculty of Geology and Geo-environment, National and Kapodistrian University of Athens, Athens, Greece (
  • 4Faculty of Engineering, Hokkaido University, Japan (

Considering the global climate change and the ensuing sea level rise, the subsequent acceleration of coastal erosion is evident. Phenomena of coastal erosion, coastal flooding and shoreline retreat are expected to show a significant increase in frequency and intensity, in global level. The effects of coastal erosion are worsened by storms, and the reduction of sediment supply associated with global warming and anthropogenic modification of rivers and coastlines. As a countermeasure to coastal erosion, this work focuses on the development of coastal artificial in-situ rocks. We developed a new method that encompasses microbes and the related mechanism is called “Microbial Induced Carbonate Precipitation” (MICP). We successfully isolated three microorganisms, Micrococcus sp., Pseudoalteromonas sp., and Virgibacillus sp., from the selected area, and investigated their effectiveness in order to make a solidified sand sample. The precipitated bounding material has also been confirmed as calcite by XRD and XRF analysis. We successfully demonstrated that all of these bacterial species are very sensitive with certain environmental parameters, such as temperature, pH, culture type, culture duration, etc. In laboratory scale, we successfully obtained solidified sand by syringe (d = 2.3 cm, h = 7.1 cm) solidification method bearing UCS (Unconfined Compressive Strength) up to 1.8 MPa using 0.5 M CaCl2 and urea as cementation solution at 30°C. In addition, we propose a new sustainable approach for field implementation of this method through a combination of geotube and MICP mechanism, which will contribute to coastal erosion protection. The proposed approach is more economic, energy-saving, eco-friendly, and sustainable for bio-mediated soil improvement.

How to cite: Imran, M. A., Nakashima, K., Evelpidou, N., and Kawasaki, S.: Innovative Approach for Addressing Coastal Erosion Protection Using Microbial Induced Carbonate Precipitation, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-2124,, 2020


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