Innovation in bioremediation

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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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