A condition rating framework for wastewater treatment plants

Altayeb Qasem, Tarek Zayed, Zhi Chen

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

1 Citation (Scopus)


Statistics Canada stated that the wastewater treatment facilities in most provinces are aging and passes 63% of their useful life in 2007 the highest ratio among public infrastructure assets. Currently, there is no standard condition rating system for wastewater treatment plants that give a specific rating index that describe the physical integrity of different infrastructure elements in the treatment plant and its environmental performance. The main objective of this study is to develop a condition-rating index for wastewater treatment plants mainly activated sludge systems. The proposed WWTP CRI, is based on dividing the treatment plant into its three treatment phases; primary phase, secondary phase and the tertiary phase. The condition-rating index will reflect the infrastructures state for each phase, mainly tanks, pipes, blowers and pumps. In addition, the condition-rating index will also reflect the treatment performance of each phase.
Original languageEnglish
Title of host publicationCanadian Society for Civil Engineering Annual Conference 2009
Number of pages10
Publication statusPublished - 1 Dec 2009
Externally publishedYes
EventCanadian Society for Civil Engineering Annual Conference 2009 - St. Johns, NL, Canada
Duration: 27 May 200930 May 2009


ConferenceCanadian Society for Civil Engineering Annual Conference 2009
CitySt. Johns, NL


  • Condition rating index
  • Wastewater treatment plants

ASJC Scopus subject areas

  • Engineering(all)

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