{"title":"Characterization of the Microbial Induced Carbonate Precipitation Technique as a Biological Cementing Agent for Sand Deposits ","authors":"Sameh Abu El-Soud, Zahra Zayed, Safwan Khedr, Adel M. Belal","volume":125,"journal":"International Journal of Civil and Environmental Engineering","pagesStart":682,"pagesEnd":687,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10007278","abstract":"<p>The population increase in Egypt is urging for horizontal land development which became a demand to allow the benefit of different natural resources and expand from the narrow Nile valley. However, this development is facing challenges preventing land development and agriculture development. Desertification and moving sand dunes in the west sector of Egypt are considered the major obstacle that is blocking the ideal land use and development. In the proposed research, the sandy soil is treated biologically using <em>Bacillus pasteurii<\/em> bacteria as these bacteria have the ability to bond the sand partials to change its state of loose sand to cemented sand, which reduces the moving ability of the sand dunes. The procedure of implementing the Microbial Induced Carbonate Precipitation Technique (MICP) technique is examined, and the different factors affecting on this process such as the medium of bacteria sample preparation, the optical density (OD600), the reactant concentration, injection rates and intervals are highlighted. Based on the findings of the MICP treatment for sandy soil, conclusions and future recommendations are reached.<\/p>\r\n","references":"[1]\tAl Qabany, A. & Soga, K. (2013). Effect of chemical treatment used in MICP on engineering properties of cemented soils , Ge\u00b4otechnique 63,No .4, 331\u2013339 \r\n[2]\tFerris, F.G., & Stehmeier, L. G. (1996). Bacteriogenic mineral plugging. Journal of Canadian Petroleum Technology, 35(8), 56-61.\r\n[3]\tDeJong, J. T., Fritzges, M. B., and Nusslein, K. (2006). \u201cMicrobially induced cementation to control sand response to undrained shear.\u201dJ. Geotech. Geoenviron. Eng., 132(11), 1381\u20131392.\r\n[4]\tAl Qabany, A., Soga, K. & Santamarina, J. C. (2012). Factors affecting efficiency of microbially induced calcite precipitation. J. Geotech. Geoenviron. Engng 138, No. 8, 992\u20131001.\r\n[5]\tAl Qabany, A. (2011). \u201cMicrobial carbonate precipitation in soils.\u201dDoctoral dissertation, Univ. of Cambridge, Cambridge, U.K.\r\n[6]\tRebata-Landa, V. (2007). Microbial activity in sediments: effects on soil behavior. PhD thesis, Georgia Institute of Technology, Atlanta, GA, USA. ","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 125, 2017"}