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Related Experiment Videos

Biological nutrient removal from meat processing wastewater using a sequencing batch reactor.

N Thayalakumaran1, R Bhamidimarri, P O Bickers

  • 1Institute of Technology and Engineering, Massey University, Palmerston North, New Zealand. N.Thayalakumaran@massey.ac.nz

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|July 17, 2003
PubMed
Summary

A sequencing batch reactor effectively treated meat processing wastewater, significantly reducing chemical oxygen demand (COD), nitrogen, and phosphorus. This method achieved over 99% removal of key pollutants, offering a sustainable solution for nutrient-rich effluents.

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Area of Science:

  • Environmental Engineering
  • Wastewater Treatment Technologies
  • Bioreactor Design

Background:

  • Meat processing effluents contain high concentrations of nutrients (nitrogen, phosphorus) and chemical oxygen demand (COD).
  • Primary treatment of these effluents leaves significant nutrient and COD loads requiring further remediation.
  • Effective treatment is crucial to mitigate environmental pollution from the meat industry.

Purpose of the Study:

  • To evaluate the efficacy of a laboratory-scale sequencing batch reactor (SBR) for treating beef processing wastewater.
  • To determine optimal operating conditions for simultaneous removal of COD, nitrogen, and phosphorus.
  • To assess the biodegradability of residual COD and the applicability of the IWA Activated Sludge Model.

Main Methods:

Related Experiment Videos

  • Operation of a laboratory-scale sequencing batch reactor (SBR) with beef processing effluent.
  • Optimization of SBR cycle parameters, including solid retention time (15 days) and hydraulic retention time (2.5 days) at 22°C.
  • Monitoring of COD, total nitrogen, total phosphorus, ammonia nitrogen, and soluble phosphate phosphorus levels throughout the treatment process.

    • Main Results:

    • Achieved over 99% removal of biodegradable soluble COD, ammonia nitrogen, and soluble phosphate phosphorus.
    • Reduced total nitrogen to <10 mg L⁻¹ and total phosphorus to <1.0 mg L⁻¹.
    • Identified residual soluble COD as non-biodegradable after prolonged aeration; validated IWA Activated Sludge Model for ammonia and nitrate removal prediction.

    Conclusions:

    • The developed SBR operating cycle is effective for simultaneous COD and nutrient removal from meat processing wastewater.
    • Low dissolved oxygen levels in the final aerobic stage enhance ammonia removal and denitrification.
    • The SBR process provides a robust solution for treating challenging meat processing effluents.