BIOKUNTO IMPROVING THE COMPETITIVENESS OF I IN SITU BIOREMEDIATION

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BIOKUNTOIMPROVING THE COMPETITIVENESS OF I IN
SITU -BIOREMEDIATION

• Martin Romantschuk
• University of Helsinki Department of
  Ecological and Environmental Sciences

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• BIOKUNTO starting point
• More than 20 000 contaminated soil sites in
  Finland
• Most common treatments
• excavation
• Natural attenuation (monitored)
• Choice A relocates the problem B very slow in
  Finland
• A not always possible (below buildings etc)
• Alternative in situ treatment
• Forms Bioremediaatio (biostimulation,
  bioaugmentation)
• Oxidation techniques (chem oxidation part of
  biostimulation)
• Extraction
• BIOKUNTO Comparison, modelling and combination
  of techniques.

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• GENERAL OBJECTIVES
• - To develop techniques for in situ treatment of
  contaminated sites
• - To develop a business concept where a
  consortium of companies with different expertize
  share the responsibility if in situ fails, ex
  situ/on site are provided as a backup threshold
  for offering in situ becomes lower

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SPECIFIC OBJECTIVES

• Biostimulation via electrokinetics (pumping in
  nutrients, electron acceptors, increase of
  temperature)
• ? mikrobes degrade the contaminants)
• Feeding of entsymes (peroxidases) by
  electro-osmosis
• ? combination of enzymatic and microbiological
  treatment
• Feeding of chemical oxidative agents (high
  concentration peroxide) hydraulic and/or
  electroosmotic pumping
• ? contaminants degraded chemically (followed by
  biological degradation)
• Extration in situ circulation of surfactants by
  electrokinesis
• ?COMBINATIONS OF THE ABOVE

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FACILITIES

• LABORATORY (modelling, testing of combinations)
• Plexglass tubes (1 3 L)
• Microcosms (20 L)
• Rotating drum (5 m3)
• PILOT/LYSIMETER-FACILITY (Juhakkala, Lahti
  modelling in field conditions and scale)
• Lysimeters (16 x 2 m3 cylinders H 2m x W 1m)
• 2 x 16 m3 containers
• INDUSTRIAL CONTAINERS
• ACTUAL FIELD SITES

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Transportation of bacterial in dense soil by
electroosmosis
Electrokinetics in a DC electric field

• Elektromigration ions/particles move according
  the charge towards the electrode
• Elektroosmosis water moves through the dense
  matrix towards the cathode
• Microbes and nutrients can be transported
• Soil heating
  

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Decomposition of organic compounds
Organisms biocatalysts (bakteria, fungi,
archae, plants, enzymes)
Clean soil
Contaminated soil
humus
mineralisation
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In-situ remediation old fuel station