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Basic study on anaerobic biological filtration using a floating filter media.

Weimin Xie1, Qunhui Wang, Huiling Liu

  • 1Department of Environmental Science and Engineering, Harbin Institute of Technology, Nangang, Harbin, China.

Journal of Environmental Science and Health. Part A, Toxic/Hazardous Substances & Environmental Engineering
|March 20, 2004
PubMed
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This study explored anaerobic filtration with floating media. Optimal conditions for starting the filter and achieving over 60% BOD removal efficiency were identified, highlighting the importance of flow rate and water circulation.

Area of Science:

  • Environmental Engineering
  • Water Treatment Technologies
  • Anaerobic Biological Processes

Background:

  • Anaerobic filtration is a key technology for wastewater treatment.
  • Floating media can enhance the efficiency of anaerobic filters.
  • Understanding start-up dynamics and operational parameters is crucial for effective implementation.

Purpose of the Study:

  • To gather fundamental data on anaerobic biological filtration using a novel floating media.
  • To evaluate the performance of an S-shaped polystyrene floating media in a bench-scale anaerobic filter.
  • To identify optimal conditions for the start-up and operation of this filtration system.

Main Methods:

  • Conducted experiments using a bench-scale anaerobic filter column (50 mm diameter, 1500 mm height).

Related Experiment Videos

  • Employed S-shaped polystyrene pieces as floating media.
  • Monitored parameters including temperature, biochemical oxygen demand (BOD) loading, flow rate, and effluent concentration.

    • Main Results:

    • The anaerobic filter achieved a stable start-up within approximately half a month at 20°C, favoring lower BOD loading.
    • BOD removal efficiencies exceeding 60% were obtained at BOD volumetric loadings below 6 kg/m³/d.
    • High flow rates, particularly with treated water circulation, increased effluent BOD concentration.

    Conclusions:

    • Anaerobic filtration with floating media is effective for BOD removal.
    • Longer retention times favor organic acid generation, while treated water circulation aids in their decomposition.
    • Operational parameters like flow rate and water circulation significantly influence effluent quality.