Spectra induce polarization data of bacteria in soil

Real-time monitoring of microbial activity in porous media is still facing critical challenges because conventional analytical procedures are intrusive. Induced polarization (IP) has shown promises as a non-intrusive monitoring approach of such process. However, there is still a lack of quantitative analysis of soil column experiments to show how IP-based parameters can be related to the density of bacteria. The evolution of bacteria density and induced polarization is here performed in a soil-packed column experiment using Pseudomonas Aeruginosa O1 (PAO1).

A quantitative relationship between the quadrature conductivity and the bacteria density is established and then used to assess bacteria growth and decay and infer the Monod kinetic parameters. The Monod kinetic parameters inferred from the column experiments mimicking field conditions are different from those obtained from a batch experiment.

Methods
The spectra data were collected by the portable spectra induced polarization device, and then converted to in-phase and quadrature conductivity by using equation.