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Related Experiment Videos

Urine separating sewage systems--environmental effects and resource usage.

H Jönsson1

  • 1Department of Agricultural Engineering, Swedish University of Agricultural Sciences, Uppsala.

Water Science and Technology : a Journal of the International Association on Water Pollution Research
|October 17, 2002
PubMed
Summary

Urine separation significantly reduces nitrogen and phosphorus pollution in wastewater. This practice enhances nutrient recovery for agriculture and conserves energy, offering environmental benefits over conventional systems.

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Area of Science:

  • Environmental Science
  • Resource Management
  • Agricultural Science

Background:

  • Wastewater treatment faces challenges with nutrient pollution, particularly nitrogen and phosphorus.
  • Conventional systems lead to significant nutrient loss and high energy consumption.
  • Urine contains valuable nutrients and can be utilized as a fertilizer.

Purpose of the Study:

  • To estimate the environmental and resource usage effects of urine separation.
  • To quantify the impact of urine separation on nutrient emissions and recovery.
  • To assess the energy balance of urine separation and transport for agricultural use.

Main Methods:

  • Utilized the ORWARE simulation package for environmental and resource estimations.
  • Incorporated real-world data from a urine-separating system in Stockholm.

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  • Analyzed the fertilizing potential of separated urine.

    • Main Results:

    • Urine separation reduced nitrogen and phosphorus emissions by 55% and 33%, respectively.
    • Increased nutrient flow to agriculture: 28x nitrogen, 1.35x phosphorus, 23x potassium.
    • Energy savings were achieved for transport distances under 221 km; 36% saving if transported 1 km.

    Conclusions:

    • Urine separation offers substantial environmental improvements compared to conventional wastewater systems.
    • Separated urine is a valuable, balanced fertilizer with low heavy metal content.
    • Urine separation presents a sustainable approach to nutrient management and resource recovery.