Innovation in bioremediation
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Innovation in bioremediation

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Biostimulator technologie for large-scale substrate injection at the Vanderlande site (The Netherlands)

Biostimulator technologie for large-scale substrate injection at the Vanderlande site (The Netherlands)

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Innovation in bioremediation Innovation in bioremediation Presentation Transcript

  • Innovation in bioremediation Biostimulator Technology for Large-Scale Substrate Injection Experiences at the Vanderlande NL site Christian Soeter Technical WebEx Session Project Leader
  • Contents presentation Methods for substrate injection Bioremediation at Vanderlande Industries Installation bioscreens Starting situation contamination Implementation Biostimulator Experiences Process monitoring
  • Methods for substrate injection Infiltration & Pull Push Direct Push extraction 1 à 2 m 3 100 l per m R=0,5-1 m R=2-3 m R > 10 m
  • 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 area
      • Mainly DCE and VC
      • 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
  • Situation bioscreens Vanderlande Contamination with DCE and VC 3 bioscreens at 4- 20 m -gl
  • 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
    • 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
  • 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
  • Sonic drilling Small tractor Big tractor
  • Sonic drilling Small caterpillar Big caterpillar
  • 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 sand 1 – 2 sandy loam sandy loam 2 – 3 silty sand silty 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 sand 13-14 fine sand with loam and peat layers fine sand with thin loam and peat layers 14- 16 fine sand 1st aquifer Fine sand with gravel fine sand with gravel 16 -17 fine sand with thin peat layers 17 -20 fine sand
  • Starting situation contamination NE NW Screen 1 Screen 2 Screen 3
  • Starting situation contamination Screen 3 Screen 2 Screen 1
  • Starting situation contamination DCE
  • Starting situation contamination VC
  • 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 values
        • DCE – 20 ug/l
        • VC – 5 ug/l
    • 80 wells treated instead of approximately 120 wells planned
  • Biostimulator setup Biostimulator and storage tanks Manifold on trailer
  • 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
    • Using Biostimulator for injection of 160 m 3 (~42000 gallons) substrate in 80 wells
    • Storage tanks 3 x 5 m 3 (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 m 3 (~2100 gallons) soybean oil and 4 m 3 (~1050 gallons) surfactant
    • Substrate injection over distance of 300 m -> thresholds
    Using biostimulator
  • Substrate injection Injection wells with injector heads Thresholds for distribution across the street
  • Substrate injection Flow control at manifold Pressure control at injection wells
  • Experiences
    • Injection team with 3 operators needed for biostimulator
    • Injection in 10 to 20 wells at same time possible
    • Daily injection of 25 m 3 (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%
  • 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
  • Monitoring DCE
  • Monitoring VC
  • Monitoring Ethene
  • Monitoring ORP
  • Monitoring sulfate
  • Monitoring DOC
  • 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
  • The End
    • Thanks for your attention !
    • Knowledge transfer
    • Come and see the Biostimulator in NL
    • ...... Or, perhaps we bring the Biostimulator technology to you !