• Approximately 3000 m3 of total petroleum hydrocarbon (TPH) contaminated soil; • The TPH levels exceeded the South Australia landfill disposal criteria, therefore remediation was required; • Bioremediation was preferred over alternative methods (such as thermal destruction or chemical stabilisation), as a ‘fit for purpose’ soil was produced rather than just waste soil; • A bench-top trial was conducted to ensure that the contaminated soil was suitable for bioremediation; • A co-composting method was used with static aerated biopiles. Fresh green organics were sourced from local processors to accelerate the biological process; • Inorganic fertiliser and chicken manure were also added to the soil to provide ideal conditions for the proliferation of the microbes naturally occurring in the soil; • The design of this system minimised fugitive emissions by encapsulating the soil in a high-density polyethylene (HDPE) liner; • The emissions from the air extraction system were passed through a carbon filter to remove volatile organic carbon, thereby reducing odour impacts; • The treated soil was used to construct a series of environmental mounds at the Penrice site; • Overall the project was deemed a success in terms of environmental sustainability and cost effectiveness. More Information To find out more about this project, please visit the EPA website. www.epa.sa.gov.au/penrice.html#bio o for soils compost Soil Remediation TPH Soil, Penrice Soda Products, Osborne South Australia Case Study 1 1

o co mpost Soil Remediation for soils Case Study 1 1 - AORA

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Page 1: o co mpost Soil Remediation for soils Case Study 1 1 - AORA

• Approximately3000m3oftotalpetroleumhydrocarbon(TPH)contaminatedsoil;

• TheTPHlevelsexceededtheSouthAustralialandfilldisposalcriteria,thereforeremediationwasrequired;

• Bioremediationwaspreferredoveralternativemethods(suchasthermaldestructionorchemicalstabilisation),asa‘fitforpurpose’soilwasproducedratherthanjustwastesoil;

• Abench-toptrialwasconductedtoensurethatthecontaminatedsoilwassuitableforbioremediation;

• Aco-compostingmethodwasusedwithstaticaeratedbiopiles.Freshgreenorganicsweresourcedfromlocalprocessorstoacceleratethebiologicalprocess;

• Inorganicfertiliserandchickenmanurewerealsoaddedtothesoiltoprovideidealconditionsfortheproliferationofthemicrobesnaturallyoccurringinthesoil;

• Thedesignofthissystemminimisedfugitiveemissionsbyencapsulatingthesoilinahigh-densitypolyethylene(HDPE)liner;

• Theemissionsfromtheairextractionsystemwerepassedthroughacarbonfiltertoremovevolatileorganiccarbon,therebyreducingodourimpacts;

• ThetreatedsoilwasusedtoconstructaseriesofenvironmentalmoundsatthePenricesite;

• Overalltheprojectwasdeemedasuccessintermsofenvironmentalsustainabilityandcosteffectiveness.

More Information

Tofindoutmoreaboutthisproject,pleasevisittheEPAwebsite.www.epa.sa.gov.au/penrice.html#bio

oforsoilscompost Soil Remediation

TPH Soil, Penrice Soda Products, Osborne South Australia

Case Study 1