Microbial induced calcite precipitation (MICP) a sustainable technique for stabilization of soil: A review

Abstract

The MICP (Microbial Induced Calcite Precipitation) methodology is a form of bio-cementation that is becoming increasingly popular in today's world in order to enhance the geotechnical properties of natural soil. This method is not only good for the environment but also sustainable in long term and cost-effective. The mineral calcite, which is responsible for cementing substances together, is created by a process known as urea hydrolysis, which is carried out by bacteria that are urealytic. Gram-positive bacteria strains such as Bacillus pasteurii, K. flava CR1, B. cereus,B. subtilis, B. megaterium, B. simplex, and other Bacillussp., as well as gram-negative bacteria strains such as Bacillus sphaericus, Halomonas sp., Pararhodobacter sp. and Acinetobacter sp. SC4 and others, are among those that are utilised. MICP typically involves the hydrolysis of urea, which is a reliable and efficient method. In order to make progress in the implementation of this method, a group of researchers have been regularly working on it. In this paper, we examine the mechanism of MICP, factors that affect MICP, the literature review, bacteria culture, testing, and lastly, we summarize our paper on the conclusion.