Biological Treatment

Tractor performing Bacterial/Nutrient Addition Bioremediation, whether of excavated soils, aquifer solids or unsaturated subsurface materials, is the use of micro-organisms to convert harmful chemical compounds to less harmful chemical compounds in order to effect remediation of a site.

The microorganisms are generally bacteria, but fungi have also been used. Indigenous bacteria that can degrade a variety of organic compounds are present in nearly all subsurface materials.

The soil environment is altered to increase the rate of biological activity. Temperature and moisture levels are controlled. Soil can also be augmented with bulking agents, nutrients, respiratory gasses and specially selected bacteria to speed up the bioremediation effect.


This flowchart illustrates all possible stages of the remediation process and is fully interactive; click on each process box for a detailed description...