It’s impossible to treat contaminated subsurface soil with a bioreactor in large scale. The technique

in situ bioremediation

as a new available way is being applied. It takes consideration to get higher biodegradation by improving ecological factors for indigenous microflora. It’s important to introduce new microorganisms to the subsurface environment. Those introduced microorganisms could be specific for degrading target contaminants

and can settle to develop dominant populations. This procedure will be affected by soil matrix properties

organisms properties and operational factors.