What is the difference between Biosparging and bioventing?

In bioventing, only carbon dioxide and clean air are vented and no volatile organic hydrocarbons (Frutos et al., 2010). On the other hand, biosparging involves applying air under pressure at low rates of flow to groundwater.

What is the role of Biosparging in bioremediation?

Microbial Bioremediation 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.

What is bioventing process?

Bioventing is a process of stimulating the natural in situ biodegradation of contaminants in soil by providing air or oxygen to existing soil microorganisms. Bioventing uses low air flow rates to provide only enough oxygen to sustain microbial activity in the vadose zone.

What are 2 types of bioremediation?

Types of Bioremediation

  • 1) Biostimulation. As the name suggests, the bacteria is stimulated to initiate the process.
  • 2) Bioaugmentation. At times, there are certain sites where microorganisms are required to extract the contaminants.
  • 3) Intrinsic Bioremediation.
  • Incineration.
  • Phytoremediation.

What is meant by Biosparging?

Biosparging. Biosparging, like bioventing, is an in situ remediation technique that supplies oxygen and nutrients (if needed) to contaminated soils to promote aerobic biodegradation of contaminants (i.e. petroleum hydrocarbons) by indigenous microorganisms.

Where is bioventing used?

Bioventing is most often used at sites with mid-weight petroleum products (i.e., diesel fuel and jet fuel), because lighter products (i.e., gasoline) tend to volatilize readily and can be removed more rapidly using SVE.

What is in situ and ex situ bioremediation?

It can be done in two ways: in situ or ex situ. In in situ bioremediation, contaminants are treated at the same site using biological systems. In ex situ bioremediation, contaminants are treated in some other place from the original site. This is the key difference between in situ and ex situ bioremediation.

What is the meaning of Phytovolatilization?

Phytovolatilization. Phytovolatilization involves the uptake of contaminants by plant roots and its conversion to a gaseous state, and release into the atmosphere. This process is driven by the evapotranspiration of plants (Figure 3B).

What is the difference between situ and ex situ?

In situ refers to the on-site and it is used to describe methods carried out in the original place. On the other hand, ex situ refers to the off-site and it is used to describe the methods carried out away from the original place.