PhysChem_Remediation_Technology

7/23/2019 PhysChem_Remediation_Technology

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Chemical/physical Remediation

Technologies

Kara Reed

Kirstyn White


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Thermal De-sorption

Physical separation process designed to

volatilize water and organic contaminants

Not designed to destroy organics

Three types:

Direct fired

Indirect fired

Indirect heated


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High or lowtemp thermal desorption

!ffgas is collected and either:

Incinerated in after"#rner

$ollected on activated charcoal

Recovered in condensation e%#ipment


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&enefits

Direct fired:' Kiln temp m#ch lower than that of incinerator

' (ighter for transport) less set#p * maintenance

Indirect fired:

' W+ offgas condensing system) no limitation on metalsremediated

Draw"ac,s:

-pecific particle size re%#irements

Dewatering may "e needed to red#ce moist#re

Highly a"rasive contaminants damage processor #nit


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Soil Flushing

Insit#$osolvent sol#tion&rea,s down contaminants

Dissolved contaminants leach into gro#ndwater.$ollected with e/traction wells and treated

0sef#l for: heavy metals) halogenated solvents)aromatics) gasoline) f#els) P$&s


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&enefits:

Transporta"le

(ow cost

$losed system 1#naffected "y e/ternal conditions2

Draw"ac,s:

(eaves cosolvent resid#als in soil

Not applica"le to lowpermea"ility soils


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Composting

3/sit#

4icroorganisms "rea, down e/plosives

$onverts them into harmless "yprod#cts

Provide microorganisms with n#trients

$ar"on) nitrogen) phosphor#s) potassi#m

-ome additives: man#re * potato wastes


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&enefits:

No harmf#l "yprod#cts$osts less than e/cavation * incineration

$an sell h#m#srich soil for 567+ton

Will enhance region if soil replaced

Draw"ac,s:

Process may ta,e e/tended period of time

4#st remove soil) potentially dist#r"ing "iota and

wildlife4#st test for optimal mi/t#re of contaminated soiland additives


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Enhanced Bioremediation

Insit#

-tim#lating microorganisms present in soil

$irc#lating water"ased sol#tions thro#gh soil

8ero"ic or anaero"ic microroganisms


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&enefits:

-oil can remain in placeNo harmf#l "yprod#cts

$osteffective

Draw"ac,s:-lows at lower temperat#res

4ay ta,e years to degrade

Not applica"le to highly heterogeneo#s s#"s#rfaceenvironments 1i939 $lay2


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Other Remediation Alternatives

www9frtr9gov+matri/+section;+ta"le;

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PhysChem_Remediation_Technology