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Halogenated
SVOC's:
Pesticides (Aldrin etc.)
Halogenated SVOC's in
Soil
Common treatment technologies include: |
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Biodegradation
MEL-Bio®
Biodegradation MEL-Bio®
uses indigenous or inoculated micro-organisms (e.g., fungi,
bacteria, and other microbes) to degrade organic contaminants
found in soil and/or ground water. In the presence of
sufficient oxygen (aerobic conditions), micro-organisms
will ultimately convert many organic contaminants to carbon
dioxide.
All types of biodegradation, both in
situ or ex situ, can be used to remediate soils: in situ
biodegradation, bioventing, composting, bioslurping, biopiles
or land-farming. In the absence of oxygen (anaerobic conditions),
the contaminants will be ultimately changed to methane.
In-situ bioremediation of soil typically involves the
percolation or injection of ground water or uncontaminated
water containing dissolved oxygen and nutrients. Ex situ
bioremediation typically uses tilling or continuously
mixed slurries to apply oxygen and nutrients, and is performed
in a prepared bed or reactor. Bioventing is an in situ
technique that uses air injection to aerate the soil and
enhance biodegradation.
Incineration
Incineration uses high temperatures,
870° to 1,200° C, to volatilise and combust (in
the presence of oxygen) organic constituents in hazardous
wastes. The destruction and removal efficiency (DRE) for
properly operated incinerators exceeds the 99.99% requirement
for hazardous waste.
Excavation with
Off-Site Disposal
Excavation, retrieval, and off-site
disposal of contaminated soil (with or without stabilisation)
to a landfill have been performed extensively at many
sites.
Land filling of hazardous materials,
especially hazardous wastes, is becoming increasingly
difficult and expensive as a result of growing regulatory
control, and may be cost-prohibitive for sites with large
volumes, greater depths, or complex hydro geologic environments.
Determining the feasibility of off-site disposal requires
knowledge of land disposal restrictions and other regulations,
which MEL can provide.
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