Innovation in bioremediation

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

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Innovation in bioremediation

  1. 1. Innovation in bioremediation Biostimulator Technology for Large-Scale Substrate Injection Experiences at the Vanderlande NL site Christian Soeter Technical WebEx Session Project Leader
  2. 2. Contents presentation Methods for substrate injection Bioremediation at Vanderlande Industries Installation bioscreens Starting situation contamination Implementation Biostimulator Experiences Process monitoring
  3. 3. 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
  4. 4. Bioremediation at Vanderlande Industries <ul><li>Turn-key remediation for Vanderlande Industries in Veghel NL </li></ul><ul><li>Vanderlande Industries designs, builds and services baggage handling systems for airports all over the world </li></ul><ul><li>Contamination with chlorinated solvents of five hectare area </li></ul><ul><ul><li>Mainly DCE and VC </li></ul></ul><ul><ul><li>no PCE or TCE left </li></ul></ul><ul><li>Aim is a stable end situation for the contamination </li></ul><ul><li>Installation of 3 bioscreens in the plume </li></ul><ul><li>Source zone under buildings will not be treated </li></ul>
  5. 5. Situation bioscreens Vanderlande Contamination with DCE and VC 3 bioscreens at 4- 20 m -gl
  6. 6. Guarantees bioscreens Vanderlande <ul><li>We offered following guarantees: </li></ul><ul><li>Decrease of 80 to 90% in the bioscreen </li></ul><ul><li>DOC-level > 10 mg/l in the bioscreen </li></ul><ul><li>Reduction of other parameters: nitrate, iron, sulfate </li></ul><ul><li>If necessary second injection round will be carried out </li></ul>
  7. 7. <ul><li>Biostimulator for injection of soybean oil emulsion </li></ul><ul><li>Scaling up production- and injection process </li></ul><ul><li>What is the yield for us ? </li></ul>Bioscreens <ul><li>Installation of 3 bioscreens with 116 injection wells total </li></ul><ul><li>At 4 levels: 6, 10, 15 and 20 m below ground surface </li></ul><ul><li>Design based on remediation plan </li></ul>
  8. 8. 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
  9. 9. Sonic drilling Small tractor Big tractor
  10. 10. Sonic drilling Small caterpillar Big caterpillar
  11. 11. 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
  12. 12. Starting situation contamination NE NW Screen 1 Screen 2 Screen 3
  13. 13. Starting situation contamination Screen 3 Screen 2 Screen 1
  14. 14. Starting situation contamination DCE
  15. 15. Starting situation contamination VC
  16. 16. Summary starting situation <ul><li>Concentrations DCE and VC are lower than in the past </li></ul><ul><li>Maximum concentrations: DCE 2100 µg/l and VC 1200 µg/l </li></ul><ul><li>Biodegradation circumstances: sulfate reducing </li></ul><ul><li>Substrate injection at depths where concentrations </li></ul><ul><ul><ul><li>were > Dutch intervention values </li></ul></ul></ul><ul><ul><ul><li>DCE – 20 ug/l </li></ul></ul></ul><ul><ul><ul><li>VC – 5 ug/l </li></ul></ul></ul><ul><li>80 wells treated instead of approximately 120 wells planned </li></ul>
  17. 17. Biostimulator setup Biostimulator and storage tanks Manifold on trailer
  18. 18. Soybean oil emulsion Soybean oil emulsion (microscope 100 x zoom) <ul><li>Biostimulator has 2 mixing tanks and special mixing pump </li></ul><ul><li>Pruduces fine emulsion with small droplets of 2-10 µm </li></ul><ul><li>Slow-release substrate </li></ul><ul><li>Shock load injection </li></ul><ul><li>Emulsion of 10% soybean oil </li></ul><ul><li>Lifetime of five years </li></ul>
  19. 19. <ul><li>Using Biostimulator for injection of 160 m 3 (~42000 gallons) substrate in 80 wells </li></ul><ul><li>Storage tanks 3 x 5 m 3 (1320 gallons) for soybean oil and surfactant </li></ul><ul><li>Manifold on trailer with 20 connections for injection </li></ul><ul><li>Two deep wells for preparation of substrate </li></ul><ul><li>Fire hose for distribution of substrate </li></ul><ul><li>Two truck loads with 8 m 3 (~2100 gallons) soybean oil and 4 m 3 (~1050 gallons) surfactant </li></ul><ul><li>Substrate injection over distance of 300 m -> thresholds </li></ul>Using biostimulator
  20. 20. Substrate injection Injection wells with injector heads Thresholds for distribution across the street
  21. 21. Substrate injection Flow control at manifold Pressure control at injection wells
  22. 22. Experiences <ul><li>Injection team with 3 operators needed for biostimulator </li></ul><ul><li>Injection in 10 to 20 wells at same time possible </li></ul><ul><li>Daily injection of 25 m 3 (6600 gallons) substrate </li></ul><ul><li>Injection pressures range: 0,5 bar (7.3 psi) to 2,0 bar (29 psi) </li></ul><ul><li>Installation Biostimulator and filling storage tanks in 1 day </li></ul><ul><li>Injection in 80 wells with Biostimulator in 3 weeks </li></ul><ul><li>We tripled production and injection rate </li></ul><ul><li>Biostimulator cuts costs by some 30% </li></ul>
  23. 23. Process monitoring <ul><li>Biodegradation of contamination: DCE and VC </li></ul><ul><li>Biodegradation products: Ethene and ethane </li></ul><ul><li>Field parameters: dissolved oxygen, ORP, pH and EC </li></ul><ul><li>Geochemical parameters: </li></ul><ul><li>nitrate, iron (II), sulfate, methane, DOC, chloride </li></ul><ul><li>Monitoring twice a year during 5 years </li></ul>
  24. 24. Monitoring DCE
  25. 25. Monitoring VC
  26. 26. Monitoring Ethene
  27. 27. Monitoring ORP
  28. 28. Monitoring sulfate
  29. 29. Monitoring DOC
  30. 30. Conclusions process monitoring <ul><li>Concentration reduction in bioscreen: 90% </li></ul><ul><li>Ethene formation confirms complete biodegradation </li></ul><ul><li>Complete reduction of sulfate </li></ul><ul><li>DOC increased by injection of substrate </li></ul><ul><li>Substrate level is high enough for biodegradation </li></ul>
  31. 31. The End <ul><li>Thanks for your attention ! </li></ul><ul><li>Knowledge transfer </li></ul><ul><li>Come and see the Biostimulator in NL </li></ul><ul><li>...... Or, perhaps we bring the Biostimulator technology to you ! </li></ul>

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