Citrobacter braakii is a facultative anaerobic bacterium known for its metabolic versatility and potential in environmental and industrial applications. It is effective in bioremediation processes, particularly in removing heavy metals like chromium and cadmium through biosorption and bioaccumulation.

This bacterium also contributes to nutrient cycling in soils by breaking down organic matter and releasing bioavailable forms of nutrients. Its ability to tolerate diverse environmental conditions makes it a candidate for wastewater treatment and soil remediation, supporting sustainable environmental management practices.