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Reliability analysis for hazardous waste treatment processes.

R D Waters1, F L Parker

  • 1Sandia National Laboratories, Carlsbad, NM 88220, USA.

Risk Analysis : an Official Publication of the Society for Risk Analysis
|April 15, 2000
PubMed
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This study evaluates hazardous waste treatment reliability, comparing packed tower aeration and biological treatment. Higher reliability increases costs, with diminishing returns above 90% for effective hazardous waste management.

Area of Science:

  • Environmental Engineering
  • Chemical Engineering
  • Waste Management

Background:

  • Assessing treatment process reliability is crucial for meeting regulatory effluent standards.
  • Design safety factors significantly influence the reliability of hazardous waste treatment systems.

Purpose of the Study:

  • To evaluate the reliability of packed tower aeration and activated sludge biological treatment processes.
  • To compare reliability-driven designs with conventional practices and analyze cost-effectiveness.

Main Methods:

  • Applied reliability analysis to packed tower aeration and activated sludge processes.
  • Compared designs achieving 95% reliability against conventional designs.
  • Analyzed the relationship between treatment costs and reliability levels.

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Main Results:

  • Physical/chemical treatment (packed tower aeration) reliability ranged from 80% to over 99%.
  • Biological treatment reliability varied widely (near 0% to over 99%) based on the compound.
  • Cost-effectiveness showed diminishing returns for reliability increases above 90%.

Conclusions:

  • Reliability analysis provides insights into treatment process conservatism and cost.
  • Targeting uncertain process parameters can enhance treatment reliability.
  • Optimizing reliability is key for efficient and compliant hazardous waste treatment.