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Related Experiment Videos

Particle size distribution as a useful tool for microbial detection.

A Chavez1, B Jimenez, C Maya

  • 1Engineering Institute Group, Treatment and Reuse, UNAM, Ciudad Universitaria, Coyoacan 04510 Mexico City, DF. AChavezM@iingen.unam.mx

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|September 4, 2004
PubMed
Summary

Particle size distribution offers a rapid, cost-effective method for assessing wastewater microbial quality. This technique accurately quantifies helminth ova, crucial for safe irrigation, outperforming traditional methods.

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Area of Science:

  • Environmental Science
  • Microbiology
  • Water Treatment Engineering

Background:

  • Wastewater irrigation requires microbial control, but current detection methods are expensive and time-consuming.
  • Developing rapid, affordable microbial quality assessment tools is essential for safe wastewater reuse.

Purpose of the Study:

  • To establish correlations between particle size distribution and microbial concentrations (fecal coliforms, Salmonella spp., helminth ova) in wastewater.
  • To evaluate particle size distribution as a cost-effective, on-line method for microbial quality assessment.
  • To determine the optimal coagulant and critical particle size for wastewater treatment.

Main Methods:

  • Particle size distribution analysis was employed to measure wastewater microbial quality.

Related Experiment Videos

  • Correlations were developed between particle counts/volumes and concentrations of specific microorganisms.
  • The performance of different coagulants, including aluminium polychloride, was assessed.

    • Main Results:

    • Particle size distribution effectively correlated with helminth ova concentration in both raw and treated wastewater.
    • The technique provides on-line quantification of helminth ova in 5 minutes at a cost of US$3.
    • Aluminium polychloride was identified as the most effective coagulant, with 8 micrometers as the critical particle size.

    Conclusions:

    • Particle size distribution is a viable, rapid, and economical alternative for monitoring helminth ova in wastewater.
    • This method significantly reduces costs and time compared to conventional microbiological techniques.
    • Understanding particle size distribution aids in optimizing wastewater treatment processes and ensuring water safety for irrigation.