Increased P assimilation of fast-growing heterotrophs increases P capture potential in high-rate activated sludge systems

H. Truong, K. N. Ngo, A. Massoudieh, C. Bott, C. deBarbadillo, J. Jimenez, H. Hauduc, I. Takacs, G. Wells, H. De Clippeleir

Research output: Contribution to conferencePaperpeer-review

Abstract

Increased N assimilation by fast growing carbon adsorption heterotrophic organisms (AHOs) was recognized previously as a key explanatory factor leading to higher than expected nitrogen removal in high-rate activated sludge (HRAS) systems. However, the P assimilation stoichiometry and contribution to overall P removal in HRAS of AHOs has to date not been investigated. This study confirmed increased P assimilation in high-rate systems without chemical P removal based on two pilot studies. The SUMO2C model was calibrated to predict observed P assimilation, removal, and content of the HRAS sludge. Current models have significantly underestimated the potential of HRAS for nutrient capture, especially at sludge retention time (SRTs) ≤ 0.5 days.

Original languageEnglish (US)
Pages1323-1326
Number of pages4
StatePublished - 2021
Event94th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2021 - Chicago, United States
Duration: Oct 16 2021Oct 20 2021

Conference

Conference94th Annual Water Environment Federation Technical Exhibition and Conference, WEFTEC 2021
Country/TerritoryUnited States
CityChicago
Period10/16/2110/20/21

Keywords

  • High-rate activated sludge
  • assimilation
  • model

ASJC Scopus subject areas

  • Ecological Modeling
  • Environmental Chemistry
  • Pollution
  • Waste Management and Disposal
  • Water Science and Technology

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