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Related Experiment Videos

Bod measurement system with flowthrough electrode.

Y R Li1, J Chu

  • 1Department of Biochemical Engineering, East China University of Chemical Technology, Shanghai.

Chinese Journal of Biotechnology
|January 1, 1989
PubMed
Summary
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This study presents a rapid microbial sensor for estimating biochemical oxygen demand (BOD), significantly reducing analysis time from five days to under 15 minutes for effective water quality monitoring.

Area of Science:

  • Environmental Science
  • Analytical Chemistry
  • Biotechnology

Background:

  • Biochemical oxygen demand (BOD) is a critical indicator of organic pollution in water.
  • Conventional BOD testing methods are time-consuming (5 days) and complex, limiting their use in real-time process control.
  • There is a need for faster, more efficient methods for BOD estimation.

Purpose of the Study:

  • To develop a rapid microbial sensor for estimating biochemical oxygen demand (BOD).
  • To improve upon the limitations of conventional BOD determination methods.
  • To create a reliable and long-lasting sensor for water quality assessment.

Main Methods:

  • Construction of a microbial sensor using immobilized yeast cells (Hansenula anomala) and an oxygen electrode.

Related Experiment Videos

  • Design of a specialized electrode and a flow-through measuring system.
  • Calibration and testing of the biosensor with model wastewater (GGA).

    • Main Results:

    • Achieved a rapid biosensor response time of less than 15 minutes.
    • Established a linear correlation between current decrease and BOD concentration (1-45 mg/l).
    • Demonstrated a sensor service life exceeding one year with high precision (RSD < 6% at 20 mg/l BOD).

    Conclusions:

    • The developed microbial sensor offers a significantly faster alternative to conventional BOD testing.
    • This biosensor provides a reliable and stable platform for efficient water quality monitoring.
    • The technology has potential for real-time process control in wastewater treatment and environmental monitoring.