What are the remediation techniques?
Remediation techniques which have been commonly used include: containment, pump-and-treat, extraction, stabilization/solidification, soil washing, air stripping, precipitation, vitrification, thermal desorption and biological remediation.
What is in situ bioremediation example?
Some of the in situ bioremediation practices have been discussed below. Biosparging: This involves the injection of air under pressure below the water table to increase ground water oxygen concentrations and to enhance the rate of biological degradation of contaminants by naturally occurring bacteria.
Which remediation technology is applied in situ?
Some patented products include time-release compounds for more targeted remediation. In-situ remediation technologies have several advantages over other contemporary technologies such as groundwater pump and treat, air sparge/soil vapor extraction (AS/SVE), and multi-phase extraction (MPE) systems.
What are the different methods of in situ remediation?
Due to the recent invention of many in-situ treatment chemicals and bio-amendments, In-Situ Remediation methods have replaced Ex-Situ methods at many sites. These methods include In-Situ Chemical Oxidation (ISCO), In-Situ Chemical Reduction (ISCR), In-Situ Bio-Remediation (ISBR), Surfactant Flushing, or a combination of multiple methods.
What is the difference between ex situ and in situ bioremediation?
More risk of material handling/worker exposure conditions. Usually requires treatment of the contaminated soil before and, sometimes, after the actual bioremediation step. Ex situ techniques include: slurry & solid phase bioremediation: Solid-phase soil treatment processes include landfarming, soil biopiles, and composting.
How is contamination of soil treated in situ?
Contaminated soil is treated in situ by applying engineered aerobic and anaerobic bacterium that feed on the specific type of contaminant that a parcel of soil is contaminated with. The bacterium goes to work consuming and breaking down the hydrocarbons or other contaminants in the soil.
How is bioremediation used in soil remediation?
Bioremediation is also an in situ remediation technique, but uses a biological mechanism rather than a mechanical method of filtering for removing contaminants.