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Treatability, toxicity and biodegradability test methods

A Kilroy1, N F Gray

  • 1Trinity College, University of Dublin, Ireland.

Biological Reviews of the Cambridge Philosophical Society
|May 1, 1995
PubMed
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This review examines various treatability and biodegradability test methods for environmental substances. Biological testing, particularly using microorganisms, remains the most suitable for routine toxicity assessments due to its cost-effectiveness and reproducibility.

Area of Science:

  • Environmental Science
  • Microbiology
  • Ecotoxicology

Background:

  • Extensive literature exists on treatability and biodegradability testing methods.
  • Test method selection depends on specific objectives, such as determining toxicity, biodegradability, or treatability.
  • Factors influencing method selection include cost, time, resources, and required accuracy.

Purpose of the Study:

  • To review existing enzyme and bacterial growth tests for monitoring toxicants in water and wastewater.
  • To evaluate the suitability of various bioassays for assessing the toxicity and treatability of effluents.
  • To discuss the advantages and limitations of single-species versus multi-species toxicity testing.

Main Methods:

  • Review of published literature on treatability and biodegradability tests.

Related Experiment Videos

  • Analysis of enzyme and bacterial growth tests for water and wastewater monitoring.
  • Comparison of single-species and multi-species toxicity testing approaches.

    • Main Results:

    • Many rapid, inexpensive, and reproducible biological tests are available for routine assessment.
    • Biochemical and microcalorimetric approaches are promising but still in early stages for toxicity testing.
    • Single-species tests are well-established but may not accurately reflect natural field conditions, while multi-species tests are generally less sensitive.

    Conclusions:

    • The choice of test method is critical and depends on the specific goals of the assessment.
    • Microorganisms are ideal for toxicity testing due to low cost, rapid growth, and reproducibility.
    • While single-species tests are common, their applicability to complex ecosystems requires careful consideration, and multi-species tests offer an alternative perspective.