Biomedical Engineering Reference
In-Depth Information
Data Sources
Is
in situ
bioremediation a
feasible remedy?
N
o
Use Different
Technology
Yes
Is complete
degradation
occurring?
Yes
Daughter products
S
ignificant ethene
No
pH 5.5-8, buffering
Total VOCs, ORP
Cocontaminants
B
iological activities
Any inhibitory
conditions that cannot
be resolved?
Yes
No
All dissolved oxygen
(DO) > 2 mg/L
Low Fe(II), Mn(IV)
N
o anaerobic zones
Is the subsurface
highly aerobic
throughout?
Yes
No
> 10
6
cells/L
VC Reductase(s)
Microcosm testing
F
ield tests
Dhc
Can biostimulation
meet the remedial
objectives?
No
Yes
Is lag time for
complete dechlorination
acceptable?
No
Development plans
S
takeholder input
Yes
Is transient
accumulation of DCE and VC
a concern?
Yes
Vapor risks
P
lume expansion?
No
Is bioaugmentation
economically
attractive?
Yes
No
Life cycle costs
C
osts for waiting
Biostimulation
only
No
Biostimulation +
bioaugmentation
Is biostimulation
meeting goals?
Figure 4.1. Decision guide flowchart for bioaugmentation.
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