Accelerated microbial-induced CaCO<sub>3</sub> precipitation in a defined coculture of ureolytic and non-ureolytic bacteria

Strain-specific ureolytic microbial calcium carbonate precipitation.

During a study of ureolytic microbial calcium carbonate (CaCO(3)) precipitation by bacterial isolates collected from different environmental samples, morphological differences were observed in the large CaCO(3) crystal aggregates precipitated within bacterial colonies grown on agar. Based on these differences, 12 isolates were selected for further study. We hypothesized that the striking differ...

A New Method for the Screening of Ureolytic Bacteria Inducing Calcium Carbonate Precipitation

At present several studies are evaluating biological calcite precipitation as it has laid the concept of bioconcrete as a self-healing material which may be a green and more sustainable component for future architecture. This paper reports a 96 wells plate based rapid and easy method for the screening of urea hydrolyzing/calcite-precipitating bacteria. Arsenazo III was used as a colorimetric in...

In-Situ Soil Cementation with Ureolytic Bacteria by Surface Percolation

Engineered applications of ureolytic biomineralization: a review.

Microbially-induced calcium carbonate (CaCO3) precipitation (MICP) is a widely explored and promising technology for use in various engineering applications. In this review, CaCO3 precipitation induced via urea hydrolysis (ureolysis) is examined for improving construction materials, cementing porous media, hydraulic control, and remediating environmental concerns. The control of MICP is explore...

Urea and ureolytic activity in lakes of different trophic status.

Urea and uraease (U-ase) activity were determined in water samples taken from the surface layers of 17 lakes of different trophic status. Urea concentrations were inversely correlated with the trophic status of the studied lakes and varied from below the detection limit to 25 micromol l(-1). Maximal potential ureolytic activity (V(max)) ranged from 0.2 to 7.0 micromol l(-1) h(-1). The highest u...