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Related Experiment Videos

Granule development in a split-feed anaerobic baffled reactor.

P J Sallis1, S Uyanik

  • 1Environmental Engineering Group, School of Civil Engineering and Geosciences, University of Newcastle upon Tyne, Newcastle upon Tyne NE1 7RU, UK. p.j.sallis@ncl.ac.uk

Bioresource Technology
|June 12, 2003
PubMed
Summary

Modifying anaerobic baffled reactors (ABRs) with a split-feed approach (SFABR) improves stability and microbial conditions during start-up. This method enhances granule development and bacterial distribution in anaerobic digestion systems.

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Improved split feed anaerobic baffled reactor (SFABR) for shorter start-up period and higher process performance.

Water science and technology : a journal of the International Association on Water Pollution Research·2002

Area of Science:

  • Environmental Microbiology
  • Biochemical Engineering
  • Wastewater Treatment Technologies

Background:

  • Anaerobic reactors operating at high organic loading rates face instability, volatile fatty acid accumulation, and low pH.
  • Plug-flow characteristics in reactors exacerbate these issues and increase biomass exposure to toxins.

Purpose of the Study:

  • To investigate the efficacy of a split-feed anaerobic baffled reactor (SFABR) in overcoming operational limitations of conventional ABRs.
  • To compare granule development and bacterial distribution in SFABR versus normally fed ABR.

Main Methods:

  • Modification of an anaerobic baffled reactor (ABR) to create a split-feed ABR (SFABR) by distributing feed across compartments.
  • Analysis of sludge samples using scanning electron microscopy (SEM) during reactor start-up and operation.

Related Experiment Videos

  • Evaluation of bacterial populations and extracellular polymers within granule architecture.

    • Main Results:

    • SFABR creation of more favorable conditions in initial compartments (lower HRT, longer SRT).
    • Improved food availability for microorganisms in final compartments.
    • Enhanced gas mixing characteristics due to balanced gas production across the SFABR.

    Conclusions:

    • Split-feeding in ABRs can mitigate operational instability and improve microbial environments.
    • SEM analysis provides insights into how split-feeding influences granule architecture and bacterial distribution.
    • SFABR design offers a promising strategy for optimizing anaerobic digestion performance.