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Integrated risk framework for onsite wastewater treatment systems.

Steven Carroll1, Ashantha Goonetilleke, Evan Thomas

  • 1School of Urban Development, Queensland University of Technology, Brisbane, QLD, 4001, Australia. s.carroll@qut.edu.au

Environmental Management
|June 17, 2006
PubMed
Summary

New onsite wastewater treatment systems (OWTS) require better risk assessment. An integrated, risk-based approach is proposed to manage environmental and public health impacts from these essential systems.

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Area of Science:

  • Environmental Engineering
  • Public Health
  • Risk Assessment

Background:

  • Onsite wastewater treatment systems (OWTS) are crucial for urban developments lacking central sewage infrastructure.
  • Current OWTS assessment guidelines face scrutiny due to public health and environmental risks from underperforming systems, especially septic tank-soil adsorption types.
  • There is a need for improved assessment methods to ensure sustainable OWTS with minimal environmental and public health consequences.

Purpose of the Study:

  • To propose an integrated, risk-based framework for assessing hazards associated with OWTS.
  • To manage and mitigate environmental and public health risks linked to onsite wastewater treatment.
  • To provide a generic approach for risk assessment applicable to various OWTS.

Main Methods:

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  • Developed an integrated risk framework for OWTS.
  • Incorporated stakeholder input throughout the framework development process.
  • Integrated scientific knowledge, data, and analysis with risk assessment principles.
  • Identified appropriate performance goals for effective risk management and mitigation.

Main Results:

  • A generic, integrated risk-based framework for assessing OWTS was developed.
  • The framework addresses key issues including stakeholder involvement and scientific integration.
  • The framework was applied in a case study for the Gold Coast region, Australia, demonstrating its utility.

Conclusions:

  • The developed risk framework offers a more appropriate method for assessing and managing OWTS.
  • Implementing this framework can lead to more sustainable onsite wastewater treatment.
  • The case study validates the framework's effectiveness in a real-world setting.