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Related Experiment Videos

Full scale UASB reactor performance in the brewery industry.

Y H Ahn1, K S Min, R E Speece

  • 1Department of Civil and Environmental Engineering, Vanderbilt University, P.O Box 1831, Station B, Nashville, TN 37235, USA.

Environmental Technology
|May 2, 2001
PubMed
Summary

Oriental Breweries successfully used an upflow anaerobic sludge blanket (UASB) reactor for brewery wastewater pretreatment over 7 years. This system achieved over 80% CODcr removal, provided cost savings through biogas utilization, and demonstrated effective operation even at low loads.

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Area of Science:

  • Environmental Engineering
  • Biotechnology
  • Wastewater Treatment

Background:

  • Brewery wastewater presents significant organic loading challenges.
  • Anaerobic pretreatment is a viable option for treating high-strength organic industrial effluents.
  • Upflow Anaerobic Sludge Blanket (UASB) reactors are widely employed for industrial wastewater treatment.

Purpose of the Study:

  • To present a 7-year operational experience of a full-scale UASB reactor for brewery wastewater pretreatment.
  • To evaluate the efficiency, cost-effectiveness, and operational challenges of the UASB system.
  • To investigate factors affecting sludge granulation and overall performance.

Main Methods:

  • Operation of a full-scale upflow anaerobic sludge blanket (UASB) reactor for brewery wastewater.

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  • Monitoring of key performance indicators including CODcr removal, flow rates, and operational costs.
  • Analysis of sludge granulation, biomass washout, and the impact of loading conditions (underloading/overloading).

    • Main Results:

    • Achieved average CODcr removal exceeding 80% over 7 years.
    • Demonstrated successful operation despite low wastewater concentrations and flow rates.
    • Reported operational costs of $0.20-0.31 m-3, with further savings of 30-45% via biogas utilization.
    • Experienced challenges with sludge granulation maintenance, necessitating frequent reseeding due to biomass washout.
    • Identified underloading as detrimental due to long retention times and potential pre-acidification issues.

    Conclusions:

    • The UASB system is effective for brewery wastewater anaerobic pretreatment, offering high CODcr removal and cost benefits.
    • Sludge granulation maintenance is critical; underloading can be detrimental, similar to overloading.
    • Pre-acidification in a separate reactor is unnecessary for easily biodegradable substrates like brewery wastewater, as it can occur in the equalization tank.