Stabilisation/solidification and bioaugmentation treatment of petroleum drill cuttings

Reginald Kogbara, Josiah M. Ayotamuno, Ikechukwu Onuomah, Victoria Ehio, Thank God D. Damka

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Petroleum drill cuttings are usually treated by techniques suitable for particular contaminant groups. The significance of this study consists in the development of a treatment technology that can simultaneously handle the hydrocarbon and metal constituents of drill cuttings. Bioaugmentation is combined with stabilisation/solidification (S/S), within S/S monoliths and in granulated S/S monoliths. Portland cement was used for S/S treatment at 30% binder dosage. Bioaugmentation treatment involved two bacterial densities of a mixed culture bio-preparation. The effects of inclusion of compost, fertiliser and activated carbon were also evaluated. After 28 days, the combined S/S and bioaugmentation treatments recorded up to 15% higher total petroleum hydrocarbon (TPH) loss than control S/S treatment without bioaugmentation. Embedding fertiliser, activated carbon and higher bacterial density within S/S monoliths resulted in the highest (99%) TPH reduction but higher concentrations of metals. The addition of compost and lower bacterial density to granulated S/S monoliths led to similar (98%) TPH degradation and lower amounts of metals. The results suggest that with better mixture optimisation, combining S/S and bioaugmentation could engender more sustainable treatment of drill cuttings.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalApplied Geochemistry
Volume71
DOIs
Publication statusPublished - 1 Aug 2016

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Keywords

  • Bioremediation
  • Hydrocarbon utilising bacteria
  • Metals
  • Portland cement
  • Stabilisation/solidification
  • Total petroleum hydrocarbons

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution
  • Geochemistry and Petrology

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