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Related Experiment Videos

[Determination for optimal ozone dose in O3-BAC].

Ling-yu Kong1, Xiao-jian Zhang, Zhan-sheng Wang

  • 1Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. konglingyu00@mails.tsinghua.edu.cn

Huan Jing Ke Xue= Huanjing Kexue
|August 3, 2006
PubMed
Summary

Ozonation enhances water biodegradability and biostability when combined with biofiltration. The optimal ozone dose of 3 mg/L maximizes Assimilable Organic Carbon (AOC) and Biodegradable Dissolved Organic Carbon (BDOC) formation.

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Area of Science:

  • Environmental Science
  • Water Treatment Technologies
  • Microbiology

Context:

  • Conventional water treatment methods often struggle to remove all biodegradable organic matter.
  • Enhancing biodegradability and biostability is crucial for producing safe drinking water.
  • Ozonation is a pre-treatment step explored for improving biological water treatment efficacy.

Purpose:

  • To investigate the impact of ozonation on water biodegradability and biostability.
  • To determine the optimal ozone dosage for maximizing Assimilable Organic Carbon (AOC) and Biodegradable Dissolved Organic Carbon (BDOC) formation.
  • To evaluate the biostability of biologically active carbon (BAC) filter effluent after ozonation.

Summary:

  • Ozonation significantly increased AOC-P17 (20.9%-85.5%), AOC-NOX (42.1%-158.2%), and BDOC (21.4%-84.4%) across ozone doses of 2-8 mg/L.

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  • A 3 mg/L ozone dose was found to be optimal for maximizing AOC and BDOC formation.
  • Effluent from the biofilter after ozonation exhibited biostability, with AOC concentrations ranging from 35.9 to 46.6 µg/L (acetate-C), below the 50 µg/L threshold.

    • Impact:

    • Ozonation serves as an effective pre-treatment to enhance the performance of biological water treatment processes.
    • Optimized ozonation can lead to improved drinking water quality and stability.
    • This study provides valuable data for optimizing ozone dosage in multi-barrier water treatment systems.