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Related Experiment Videos

SBR performance with an excessive long sludge age.

C X Huo1

  • 1Anglian Water Technology Group, Thorpe Wood House, Thorpe Wood, Peterborough PE3 6WT, UK.

Environmental Technology
|March 29, 2005
PubMed
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Sequencing Batch Reactors (SBRs) offer technical and economic advantages over continuous flow activated sludge processes in the UK water industry. The Biobubble SBR demonstrates reliable performance due to extended hydraulic and sludge retention times, ensuring high effluent quality and low sludge production.

Area of Science:

  • Environmental Engineering
  • Water Treatment Technologies
  • Wastewater Management

Background:

  • Sequencing Batch Reactors (SBRs) are increasingly adopted in the UK water industry as an alternative to continuous flow Activated Sludge Processes (ASP).
  • While SBR technology has seen widespread implementation, operational and performance challenges have been noted.
  • This paper specifically examines the Biobubble Ltd SBR, a distinct type of SBR technology.

Purpose of the Study:

  • To review typical SBR design practices.
  • To analyze the operational parameters and performance of the Biobubble SBR.
  • To understand the factors contributing to the reliable performance of this specific SBR technology.

Main Methods:

  • Review of typical SBR design practices.

Related Experiment Videos

  • Focus on a specific Biobubble Ltd SBR system.
  • Analysis of operational data and performance studies conducted by Anglian Water Services Ltd.

    • Main Results:

    • The Biobubble SBR operates with discrete fill, aerate, settle, and decant phases, differentiating it from continuous flow ASP and other SBRs.
    • Reliable performance is attributed to a long hydraulic retention time (HRT) of approximately 70 hours (aerated), enhancing shock load tolerance.
    • Good settlement is achieved through a 1.5-hour settling phase and a low fill time ratio (FTR) of 0.05, promoting feast/famine conditions.
    • Low sludge yield (0.33 kgSS x kgBOD(-1)) results from a long sludge retention time (SRT) of about 200 days, facilitating aerobic sludge digestion within the SBR.

    Conclusions:

    • The Biobubble SBR design, characterized by long HRT and SRT, effectively ensures high effluent quality (15:10:2 TSS:BOD:AmmN) and low sludge production.
    • The operational parameters of the Biobubble SBR provide resilience against hydraulic and organic shock loadings.
    • This SBR technology presents a technically-economical advantage with enhanced performance characteristics compared to conventional ASP and other SBRs.