Assessment of the use of compost stability as an indicator of alkane and aromatic hydrocarbon degrader abundance in green waste composting materials and finished composts for soil bioremediation application

Diana Guillen Ferrari, Jennifer Pratscher, Thomas J. Aspray

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Green waste composting materials and finished composts were collected from different commercial ex situ composting sites all treating source segregated green waste feedstocks. Stability of each material was determined using the standard ORG0020 dynamic respiration test. To assess whether stability could be used as an indicator for the potential suitability of green waste composting materials and finished composts as amendments for soil bioremediation, comparison was made with alkane and aromatic hydrocarbon degrader abundance determined using a quantitative PCR (qPCR) approach. Specifically, primers targeting alkB and, polyaromatic hydrocarbon ring-hydroxylating dioxygenases genes (PAH-RHD) of Gram positive (GP) and Gram negative (GN) populations were used for qPCR analysis. The results showed no direct correction between compost stability and gene abundance. Further, increase in alkB gene abundance was not linked to PAH-RHD gene abundance. The results support the use of qPCR as a tool for screening organic amendments on a site by site basis for soil bioremediation treatment.

Original languageEnglish
Pages (from-to)365-369
Number of pages5
JournalWaste Management
Volume95
Early online date24 Jun 2019
DOIs
Publication statusPublished - 15 Jul 2019

Keywords

  • Alkane
  • Bioremediation
  • Compost
  • Stability
  • Total petroleum hydrocarbons

ASJC Scopus subject areas

  • Waste Management and Disposal

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