In general, there are three types of bioremediation: Biostimulation - Microbes are stimulated to begin the remediation process via chemicals or nutrients that activate them. Bioaugmentation - Used mainly in cleaning up soil contamination, this process adds bacteria to the surface of the affected area, where they are then allowed to grow. Intrinsic Bioremediation - Vonverts toxic materials into inert ones using the native microbiome to the affected area.