Enhancement of an Industrial Landfarm Operation Using Phytotechnologies

Les Stehmeier, Frank VanDelft(NOVA Chemicals, Canada)

Phytotechnologies – It is more than just a pretty picture!

Hydrocarbon Removal from the Landfarm and Enhanced Landfarm

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Source of spreadable material

Spreading bottom sludge

Hydrocarbon Removal in the Topsoil by Field

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Field 5 Field 6 Field 7 Field 8

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Hydrocarbon Removal in the Subsoil by Field

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Reason for Hydrocarbon Removal in the Subsoil

Reason for Hydrocarbon Removal in the Subsoil

Changes in Oil Composition – Field 7 Topsoil

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Changes in Oil Composition – Field 7 Subsoil

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Changes in Oil Composition – Field 6 Topsoil

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Changes in Oil Composition – Field 6 Subsoil

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Treated fields

Changes in Selected Metals during the Spreading Season – Topsoil

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Barium Chromium Copper Lead Nickel Vanadium

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Changes in Selected Metals during the Spreading Season – Subsoil

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Cost Summary

Seeding rate: 110kg/haLandfarm cost: 2.6¢ to 3.2¢/L of sludge spreadSeed bed preparation: $6,100/ha

Approximate 2006 CostsLandfarm cost: 3,001,832 x $0.03 = $90,055Seed bed preparation costs for Fields 5 and 6: $6,100Incremental cost if phytotechnology carried out on all eight fields: $22,800 (based on 3.74 ha spreadable landfarm)

Conclusions

• Incremental hydrocarbon reduction with phytotechnologies is greater than the incremental cost.• Landfarming and phytotechnologies reduce non-targeted compounds.• Phytotechnologies enable hydrocarbon reduction at inaccessible, to normal landfarm technology, soil depths.• Phytotechnologies do make a pretty picture.

Incremental Hydrocarbon Removal in 2006

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Phytotechnology Driven Hydrocarbon Removal

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Phytotechnologies – It is a pretty picture!