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Related Experiment Videos

Carbonaceous oxidation using a new vertically moving biofilm system.

M Rodgers1, D Burke

  • 1Department of Civil Engineering, National University of Ireland, Galway.

Environmental Technology
|August 3, 2001
PubMed
Summary

A novel biofilm system effectively removes chemical oxygen demand (COD) from synthetic wastewater. This innovative wastewater treatment technology offers efficient COD oxidation with potential for reduced reactor size and energy savings.

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Area of Science:

  • Environmental Engineering
  • Biotechnology
  • Water Treatment

Background:

  • Wastewater treatment systems require efficient methods for removing chemical oxygen demand (COD).
  • Biofilm reactors are a promising technology for biological wastewater treatment.
  • Developing high-surface-area biofilm modules is crucial for enhancing treatment efficiency.

Purpose of the Study:

  • To construct and evaluate a novel experimental biofilm system for synthetic wastewater treatment.
  • To compare the performance of two distinct biofilm module designs: corrugated plastic and honeycombed plastic.
  • To assess the system's effectiveness in removing biodegradable COD and its potential advantages.

Main Methods:

  • A laboratory-scale biofilm system was designed with a cuboid module undergoing repeated vertical immersion in synthetic wastewater.

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  • Two module types were tested: corrugated plastic (surface area 6.24 m2) and honeycombed plastic (surface area ~2.8 m2).
  • Filtered chemical oxygen demand (COD) removal rates were measured per bulk fluid volume for each module.

    • Main Results:

    • Both corrugated and honeycombed biofilm modules demonstrated high COD removal rates.
    • Achieved removal rates were 7.2 kg COD m(-3) d(-1) for corrugated and 7.6 kg COD m(-3) d(-1) for honeycombed modules.
    • These rates are comparable to or exceed those of existing wastewater treatment systems.

    Conclusions:

    • The new biofilm system is simple to construct and operate, proving highly effective for biodegradable COD removal.
    • The system shows potential for significant advantages, including reduced reactor volumes and energy consumption.
    • Low solids production and easy solids removal are additional benefits of this innovative wastewater treatment approach.