Static, dynamic and inoculum augmented respiration based test assessment for determining in-vessel compost stability

Aspray, Thomas J.; Dimambro, Mary E.; Wallace, Phil; Howell, Graham and Frederickson, James (2015). Static, dynamic and inoculum augmented respiration based test assessment for determining in-vessel compost stability. Waste Management, 42 pp. 3–9.

DOI: https://doi.org/10.1016/j.wasman.2015.04.027

Abstract

The purpose of this work was to evaluate compost (and related industry) stability tests given recent large-scale changes to feedstock, processing techniques and compost market requirements. Five stability tests (ORG0020, DR4, Dewar self-heating, oxygen update rate (OUR) and static respiration) were evaluated on composts from ten in-vessel composting sites. Spearman rank correlation coefficients were strong for the ORG0020, OUR and DR4 (both CO2 and O2 measurement), however, OUR results required data extrapolation for highly active compost samples. By comparison the Dewar self-heating and static respiration tests had weaker correlations, in part the result of under reporting highly active, low pH samples. The findings suggest that despite differences in pre-incubation period both dynamic respiration tests (ORG0020 and DR4) are best suited to deal with the wide range of compost stabilities found.

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About

  • Item ORO ID
  • 43488
  • Item Type
  • Journal Item
  • ISSN
  • 0956-053X
  • Project Funding Details
  • Funded Project NameProject IDFunding Body
    Compost Stability Impact and AssessmentOMK009-001Water and Resources Action Programme (WRAP)
    Compost Stability Impact and AssessmentOMK009-001Environment Agency
  • Keywords
  • compost stability; dynamic respiration; static respiration; self-heating; in-vessel composting
  • Academic Unit or School
  • Faculty of Science, Technology, Engineering and Mathematics (STEM)
  • Copyright Holders
  • © 2015 Elsevier Ltd.
  • Depositing User
  • Graham Howell

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