innovation in bioremediation
DESCRIPTION
Biostimulator technologie for large-scale substrate injection at the Vanderlande site (The Netherlands)TRANSCRIPT
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Innovation in bioremediation
Biostimulator Technology for Large-Scale Substrate Injection Experiences at the Vanderlande NL site
Christian Soeter Technical WebEx Session
Project Leader
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Contents presentation
Methods for substrate injection
Bioremediation at Vanderlande Industries
Installation bioscreens
Starting situation contamination
Implementation Biostimulator
Experiences
Process monitoring
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Methods for substrate injection
Infiltration & Pull Push Direct Pushextraction 1 à 2 m3 100 l per m
R=0,5-1 mR=2-3 m
R > 10 m
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Bioremediation at Vanderlande Industries
• Turn-key remediation for Vanderlande Industries in Veghel NL
• Vanderlande Industries designs, builds and services baggage handling systems for airports all over the world
• Contamination with chlorinated solvents of five hectare areao Mainly DCE and VCo no PCE or TCE left
• Aim is a stable end situation for the contamination
• Installation of 3 bioscreens in the plume
• Source zone under buildings will not be treated
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Situation bioscreens Vanderlande
Contamination
with DCE and VC
3 bioscreens
at 4- 20 m -gl
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Guarantees bioscreens Vanderlande
We offered following guarantees:
• Decrease of 80 to 90% in the bioscreen
• DOC-level > 10 mg/l in the bioscreen
• Reduction of other parameters: nitrate, iron, sulfate
• If necessary second injection round will be carried out
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• Biostimulator for injection of soybean oil emulsion
• Scaling up production- and injection process
• What is the yield for us ?
Bioscreens
• Installation of 3 bioscreens with 116 injection wells total
• At 4 levels: 6, 10, 15 and 20 m below ground surface
• Design based on remediation plan
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Drilling works
Well screen
Blind tube
blind tube
Well screen
Well cover
Cement
Bentonite
Gravel
Bentonite
Gravel
Gravel
Ground level 1 well/borehole 2 wells/borehole
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Sonic drilling
Small tractor Big tractor
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Sonic drilling
Small caterpillar Big caterpillar
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Soil stratification Nuenen formation
Depth Bioscreen 1 Bioscreen 2 Bioscreen 3
(m-gl) Borehole 1, 11 and 20 Borehole 21 and 35 Borehole 37
0 – 1 silty sand silty sand
silty sand1 – 2 sandy loam sandy loam
2 – 3 silty sandsilty sand
3 - 4 sandy loam
4 – 9 fine sand fine sand fine sand
9 -10 fine sand with thin peat layers
fine sand with thin peat layers
fine sand with thin loam and peat layers
10-13 fine sand fine sand
fine sand13-14 fine sand with loam and peat layers
fine sand with thin loam and peat layers
14- 16 fine sand
1st aquiferFine sand with gravel fine sand with gravel16 -17 fine sand with thin peat
layers
17 -20 fine sand
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Starting situation contamination
NE
NW
Screen 1
Screen 2
Screen 3
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Starting situation contamination
Screen 3Screen 2Screen 1
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Starting situation contamination DCE
Monitoring DCE bioscreens
1
10
100
1000
10000
In front Bioscreen Behind
Monitoringwells
Co
nce
ntr
atio
n D
CE
(µg
/l)
Screen 1 NE-side 10 m -gl Screen 1 NW-side 10 m -gl Screen 1 NW-side 15 m -gl Screen 2 20 m -gl
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Starting situation contamination VC
Monitoring VC bioscreens
1
10
100
1000
10000
In front Bioscreen Behind
Monitoringwells
Co
nce
ntr
atio
n V
C (
µg/l)
Screen 1 NE-side 10 m -gl Screen 1 NW-side 10 m -gl Screen 1 NW-side 15 m -gl Screen 2 20 m -gl
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Summary starting situation
• Concentrations DCE and VC are lower than in the past
• Maximum concentrations: DCE 2100 µg/l and VC 1200 µg/l
• Biodegradation circumstances: sulfate reducing
• Substrate injection at depths where concentrations were > Dutch intervention valuesoDCE – 20 ug/loVC – 5 ug/l
• 80 wells treated instead of approximately 120 wells planned
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Biostimulator setup
Biostimulator and storage tanks Manifold on trailer
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Soybean oil emulsion
Soybean oil emulsion (microscope 100 x zoom)
• Biostimulator has 2 mixing tanks and special mixing pump
• Pruduces fine emulsion with small droplets of 2-10 µm
• Slow-release substrate
• Shock load injection
• Emulsion of 10% soybean oil
• Lifetime of five years
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• Using Biostimulator for injection of 160 m3 (~42000 gallons) substrate in 80 wells
• Storage tanks 3 x 5 m3 (1320 gallons) for soybean oil and surfactant
• Manifold on trailer with 20 connections for injection
• Two deep wells for preparation of substrate
• Fire hose for distribution of substrate
• Two truck loads with 8 m3 (~2100 gallons) soybean oil and 4 m3 (~1050 gallons) surfactant
• Substrate injection over distance of 300 m -> thresholds
Using biostimulator
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Substrate injection
Injection wells with injector heads
Thresholds for distribution across the street
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Substrate injection
Flow control at manifold Pressure control at injection wells
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Experiences
• Injection team with 3 operators needed for biostimulator
• Injection in 10 to 20 wells at same time possible
• Daily injection of 25 m3 (6600 gallons) substrate
• Injection pressures range: 0,5 bar (7.3 psi) to 2,0 bar (29 psi)
• Installation Biostimulator and filling storage tanks in 1 day
• Injection in 80 wells with Biostimulator in 3 weeks
• We tripled production and injection rate
• Biostimulator cuts costs by some 30%
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Process monitoring
• Biodegradation of contamination: DCE and VC
• Biodegradation products: Ethene and ethane
• Field parameters: dissolved oxygen, ORP, pH and EC
• Geochemical parameters:
nitrate, iron (II), sulfate, methane, DOC, chloride
• Monitoring twice a year during 5 years
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Monitoring DCE
Monitoring DCE bioscreen 1 at 15 m -gl
0
500
1000
1500
2000
2500
3000
In front Bioscreen Behind
pb 8 Inj 13C pb 9
Monitoringwells
Co
nce
ntr
atio
n D
CE
(µ
g/l
)
sep 2010 jan 2011 mrt 2011 jun 2011 sep 2011 mrt 2012 sep 2012 mrt 2013 sep 2013 mrt 2014 sep 2014 mrt 2015 sep 2015
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Monitoring VC
Monitoring VC bioscreen 1 at 15 m -mv
0
200
400
600
800
1000
1200
1400
1600
In front Bioscreen Behind
pb 8 Inj 13C pb 9
Monitoringwells
Co
nce
ntr
atio
n V
C
(µg
/l)
sep 2010 jan 2011 mrt 2011 jun 2011 sep 2011 mrt 2012 sep 2012 mrt 2013 sep 2013 mrt 2014 sep 2014 mrt 2015 sep 2015
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Monitoring Ethene
Monitoring Ethene bioscreen 1 at 15 m -gl
0
50
100
150
200
250
300
350
400
450
In front Bioscreen Behind
pb 8 Inj 13C pb 9
Monitoringwells
Co
nce
ntr
atio
n E
then
e (
µg
/l)
sep 2010 jan 2011 jun 2011 sep 2011 sep 2012 sep 2013 sep 2014 sep 2015
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Monitoring ORP
Monitoring Oxidation Reduction Potential bioscreen 1 at 15 m -gl
-500
-400
-300
-200
-100
0
100
In front Bioscreen Behind
pb 8 Inj 13C pb 9
Monitoringwells
OR
P (
mV
)
sep 2010 jan 2011 mrt 2011 jun 2011 sep 2011 mrt 2012 sep 2012 mrt 2013 sep 2013 mrt 2014 sep 2014 mrt 2015 sep 2015
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Monitoring sulfate
Monitoring sulfate bioscreen 1 at 15 m -gl
0,0
10,0
20,0
30,0
40,0
50,0
60,0
70,0
80,0
90,0
In front Bioscreen Behind
pb 8 Inj 13C pb 9
Monitoringwells
Su
lfat
e (m
g/l
)
sep 2010 jan 2011 jun 2011 sep 2011 sep 2012 sep 2013 sep 2014 sep 2015
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Monitoring DOC
Monitoring DOC bioscreen 1 at 15 m -gl
0
100
200
300
400
500
600
700
800
In front Bioscreen Behind
pb 8 Inj 13C pb 9
Monitoringwells
DO
C (
mg
/l)
sep 2010 jan 2011 jun 2011 sep 2011 sep 2012 sep 2013 sep 2014 sep 2015
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Conclusions process monitoring
• Concentration reduction in bioscreen: 90%
• Ethene formation confirms complete biodegradation
• Complete reduction of sulfate
• DOC increased by injection of substrate
• Substrate level is high enough for biodegradation
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The End
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