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Wastewater services for small communities.

S Gray1, N Booker

  • 1CSIRO Molecular Science, Private Bag 10, Clayton Sth MDC, Victoria, Australia, 3169. Stephen.Gray@csiro.au

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|June 10, 2003
PubMed
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Conventional septic systems are costly and inefficient for small communities. Alternative local wastewater treatment options offer significant nutrient reduction at lower costs, enabling local reuse of treated effluent.

Area of Science:

  • Environmental Engineering
  • Water Resource Management
  • Sustainable Communities

Background:

  • Small, dispersed communities often rely on expensive on-site septic systems.
  • Conventional septic systems have seasonal nutrient removal efficiency, causing environmental issues as communities grow.
  • Transporting sewage to regional plants is prohibitively expensive for many isolated areas.

Purpose of the Study:

  • To explore cost-effective alternative wastewater treatment systems for small communities.
  • To identify solutions providing acceptable environmental outcomes at lower costs than regional treatment.
  • To assess the feasibility of local treatment and water recycling options.

Main Methods:

  • Scenario analysis comparing various alternative systems.

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  • Assessment of local treatment plants, separate blackwater/greywater systems, and non-potable water recycling.
  • Cost-benefit analysis against existing septic systems and regional treatment.

    • Main Results:

    • Alternative systems can achieve over 90% reduction in nutrient discharge.
    • Identified solutions are significantly more cost-effective than transporting wastewater to regional plants.
    • Local wastewater treatment enables retention and reuse of effluent within the community.

    Conclusions:

    • Alternative local wastewater treatment systems are viable for small communities.
    • These systems offer substantial environmental benefits and cost savings.
    • Wastewater can be managed locally, promoting sustainable water resource management and reuse.