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Related Experiment Videos

Biomass and microbial activity in a biofilter during backwashing.

Yu Bai1, Jie Zhang, Yi-Fan Li

  • 1Beijing Drainage Group Limited Company, Beijing 100061, China. Baiyu75322@163.com

Journal of Zhejiang University. Science. B
|April 12, 2005
PubMed
Summary

Backwashing biofilters for wastewater treatment can accelerate start-up by redistributing microbial groups. Mathematical models of biomass and activity profiles help optimize airflow during backwashing for efficient tertiary treatment.

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Area of Science:

  • Environmental Engineering
  • Microbiology
  • Water Treatment

Background:

  • Biofilters are crucial for tertiary wastewater treatment.
  • Backwashing is a key process for maintaining biofilter efficiency.
  • Understanding biomass and microbial dynamics during backwashing is essential for process optimization.

Purpose of the Study:

  • To investigate the impact of backwashing on biomass and microbial activity distribution in biofilters.
  • To develop mathematical models describing biomass and microbial activity profiles.
  • To determine optimal airflow rates for backwashing based on microbial activity.

Main Methods:

  • Investigated biomass and microbial activity in biofilters during backwashing.
  • Analyzed microbial group distribution along biofilter depth.

Related Experiment Videos

  • Developed quadratic equations to model biomass and microbial activity profiles.
  • Calculated oxygen demand differences to determine airflow rates.

    • Main Results:

    • Short-term, low-flow backwashing altered microbial distribution and accelerated biofilter start-up.
    • Biomass and microbial activity profiles varied with depth and were mathematically described by quadratic equations.
    • Oxygen demand differences were calculated using these profiles to inform airflow rate determination.

    Conclusions:

    • Backwashing can effectively redistribute biomass and microbial communities in biofilters.
    • Mathematical modeling of biomass and activity profiles provides a method for optimizing backwashing airflow.
    • Accurate airflow rate determination enhances biofilter performance and efficiency in tertiary treatment.