Expecting the explanation in term of creating biologically active zone.
You can design a biostimulation system (bioreclamation injection system) that consists of injecting both oxygen and nutrients in the subsurface to boost the biodegradation en aerobic conditions.
Well, explanation to the forward recommended answer by Romain Chesnaux.
I quote the information below from the attached pdf, which I think helps you.
Permeable Reactive Barriers (Bio barriers)
• Semi-permeable reactive media in flow path
• Chemically or biologically-mediated reactions transform contaminants into non-toxic or immobile products
• Hydrocarbons need to be oxidized
• Chlorinated solvents and nitrate need to be reduced
• Microorganisms help mediate redox reactions to gain energy and materials for synthesis
Oxidative Biodegradation
• To respire electrons removed from contaminants, need electron acceptors
• Aerobic methods Molecular Oxygen
• Anaerobic methods Nutrients (nitrate, sulfates, CO2, ferric iron, metal oxides, etc)
• Aerobic methods are generally preferred to provide more energy to the microbes
• Biochemical oxygen demands (BOD’s) often exceed available oxygen, so adding oxygen to the system can stimulate oxidative biodegradation.
Sincerely
Shukra Raj Paudel:
Biobarriers have various construction depending on pollutant to be treated, hydrogeologic and geologic situation in a contaminated site, the treatment goals and many other variables. Your question is too general to give detailed information.
Best regards
Vit
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