In situ bioremediation involves:
In situ bioremediation treats contamination directly within subsurface without excavation, preserving soil structure, minimizing disturbance to existing infrastructure and reducing expenses linked to transportation plus disposal. Treatment mobilizes indigenous microbes already adapted or introduced augmentative cultures capable of degrading target compounds within aquifer pores or vadose zone voids. Technologies include bioventing delivering low-flow air 1 to 3 cubic feet per minute per well to unsaturated zone to support aerobic oxidation of fuel hydrocarbons via alkane monooxygenase, biospar
Ref: EPA In Situ Bioremediation Technical Guide 2013; Bouwer & Zehnder Soil bioremediation; PubMed in situ review.