Deciphering the Interplay of Sludge Age and Aeration on Reactor Performance and Microbial Dynamics in High-Rate Contact Stabilization

Redirecting wastewater organics from conventional energy-consuming aerobic biological removal to an energy-producing process can transform wastewater treatment plants into energy-neutral or energy-positive resource recovery facilities. This study explores the influence of solids retention times (SRTs) and the absence or presence of aeration in the contact phase on the reactor performance and the microbial community in high-rate contact stabilization (HiCS) reactors. Through high-throughput sequencing, we unveil the diversity and complexity of these microbial communities, pinpointing Aquabacterium and Acinetobacter as dominant species particularly susceptible to these parameters. The shifts in microbial communities had clear correlations with reactor performance, impacting carbon capture efficiency, total chemical oxygen demand removal, extracellular polymeric substances, and polyhydroxyalkanoate production. SRT of 1.3 days with aeration in the contact phase resulted in significantly higher carbon capture efficiency. This work elucidates the intricate interplay between HiCS reactor settings, microbial dynamics, and process performance, paving the road for future work optimizing operational conditions in scaled HiCS reactors.

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Work Title Deciphering the Interplay of Sludge Age and Aeration on Reactor Performance and Microbial Dynamics in High-Rate Contact Stabilization
Access
Open Access
Creators
  1. Leiyu He
  2. Bing Guo
  3. Siegfried E. Vlaeminck
  4. Meng Wang
Keyword
  1. Wastewater carbon Redirection
  2. High-Rate Activated Sludge
  3. Microbial Ecology
  4. EPS
  5. PHA
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. ACS Publications
Publication Date March 27, 2024
Publisher Identifier (DOI)
  1. https://doi.org/10.1021/acsestengg.3c00483
Deposited May 24, 2024

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Version 1
published

  • Created
  • Updated
  • Updated
  • Updated Description, Publication Date Show Changes
    Description
    • Redirecting wastewater organics from conventional energy-consuming aerobic biological removal to an energy-producing process can transform wastewater treatment plants into energy-neutral or energy-positive resource recovery facilities. This study explores the influence of solids retention times (SRTs) and the absence or presence of aeration in the contact phase on the reactor performance and the microbial community in high-rate contact stabilization (HiCS) reactors. Through high-throughput sequencing, we unveil the diversity and complexity of these microbial communities, pinpointing Aquabacterium and Acinetobacter as dominant species particularly susceptible to these parameters. The shifts in microbial communities had clear correlations with reactor performance, impacting carbon capture efficiency, total chemical oxygen demand removal, extracellular polymeric substances, and polyhydroxyalkanoate production. SRT of 1.3 days with aeration in the contact phase resulted in significantly higher carbon capture efficiency. This work elucidates the intricate interplay between HiCS reactor settings, microbial dynamics, and process performance, paving the road for future work optimizing operational conditions in scaled HiCS reactors.
    Publication Date
    • 2024
  • Added Creator Leiyu He
  • Added Creator Meng Wang
  • Added Creator Bing Guo
  • Added Creator Siegfried E. Vlaeminck
  • Added EST_Engineering carbon capture Final clean version.pdf
  • Updated Publisher Identifier (DOI), License Show Changes
    Publisher Identifier (DOI)
    • https://doi.org/10.1021/acsestengg.3c00483
    License
    • https://rightsstatements.org/page/InC/1.0/
  • Published
  • Updated
  • Updated Keyword, Publisher, Publication Date Show Changes
    Keyword
    • wastewater carbon redirection , high-rate activated sludge, microbial ecology, eps, pha
    Publisher
    • ACS Publications
    Publication Date
    • 2024
    • 2024-03-27
  • Updated Keyword Show Changes
    Keyword
    • wastewater carbon redirection , high-rate activated sludge, microbial ecology, eps, pha
    • Wastewater carbon Redirection , High-Rate Activated Sludge, Microbial Ecology, EPS, PHA

Version 2
published

  • Created
  • Updated Creator Bing Guo
  • Updated Creator Meng Wang
  • Updated Creator Siegfried E. Vlaeminck
  • Published
  • Updated