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Importance of safe recycling of animal and human excreta

Presentation by Björn Vinnerås, SLU, 2020-11-25

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Importance of safe recycling of animal and human excreta

  1. 1. Swedish University of Agricultural Sciences Importance of safe recycling of animal and human excreta Björn Vinnerås Professor Environmental Engineering
  2. 2. Pathogens to the environment  Current treatment — Dilution — Distance — Time  Minimise direct contact — Landfilling — Wastewater system  Linear system - efficient
  3. 3. Effect of linear system  Water excellent solvent & transporter  Environmental pollution — Pathogens — Nutrients — Debris  Treatment is required
  4. 4.  Create distance  Avoid environmental pollution — Collection — Treatment — Dilution/disposal
  5. 5.  Create distance  Avoid environmental pollution — Collection — Production — Re-use  Circular economy possible driver  Source separation
  6. 6. Value in resources  Water — Clean water!  Plant nutrients — 1kg N  < €1  2kg Urea  >200kg biofertiliser — 1kg P  < €3  7 kg Super phosphate  > 1,000kg biofertiliser  Other products — Protein — Lipids
  7. 7. Closing the loop Collection Treatment Reuse CONTROLLED COLLECTION POTENTIAL POLLUTANT SAFE PROCESS RESOURCE IDENTIFICATION Identify the flows and potential pollutants Decrease dilution and source separation Look at end user demand Avoid polluting processSafe process What material can the user utilise USER FOCUS Quality of source, process and product QUALITY ASSURANCE Utilise the resources not a disposal action SAFE USE
  8. 8. Closing the loop Collection Treatment Reuse CONTROLLED COLLECTION POTENTIAL POLLUTANT SAFE PROCESS RESOURCE IDENTIFICATION Identify the flows and potential pollutants Decrease dilution and separate at source Look at end user demand Avoid polluting processSafe process What material can the user utilise USER FOCUS Quality of source, process and product QUALITY ASSURANCE Utilise the resources not a disposal action SAFE USE
  9. 9. Closing the loop Collection Treatment Reuse CONTROLLED COLLECTION POTENTIAL POLLUTANT SAFE PROCESS RESOURCE IDENTIFICATION Identify the flows and potential pollutants Decrease dilution and source separation Look at end user demand Avoid polluting processSafe process What material can the user utilise USER FOCUS Quality of source, process and product QUALITY ASSURANCE Utilise the resources not a disposal action SAFE USE
  10. 10. Closing the loop Collection Treatment Reuse CONTROLLED COLLECTION POTENTIAL POLLUTANT SAFE PROCESS RESOURCE IDENTIFICATION Identify the flows and potential pollutants Decrease dilution and source separation Look at end user demand Avoid polluting process remove pathogens Safe process What material can the user utilise USER FOCUS Quality of source, process and product QUALITY ASSURANCE Utilise the resources not a disposal action SAFE USE
  11. 11. Closing the loop Collection Treatment Reuse CONTROLLED COLLECTION POTENTIAL POLLUTANT SAFE PROCESS RESOURCE IDENTIFICATION Identify the flows and potential pollutants Decrease dilution and source separation Look at end user demand Avoid polluting process remove pathogens Safe process What material can the user utilise USER FOCUS Quality of source, process and product QUALITY ASSURANCE Utilise the resources not a disposal action SAFE USE
  12. 12. Closing the loop Collection Treatment Reuse CONTROLLED COLLECTION POTENTIAL POLLUTANT SAFE PROCESS RESOURCE IDENTIFICATION Identify the flows and potential pollutants Decrease dilution and source separation Look at end user demand Avoid polluting process remove pathogens Safe process What material can the user utilise USER FOCUS Quality of source, process and product QUALITY ASSURANCE Utilise the resources not a disposal action SAFE USE
  13. 13. Closing the loop Collection Treatment Reuse CONTROLLED COLLECTION POTENTIAL POLLUTANT SAFE PROCESS RESOURCE IDENTIFICATION Identify the flows and potential pollutants Decrease dilution and source separation Look at end user demand Avoid polluting process remove pathogens Safe process What material can the user utilise USER FOCUS Quality of source, process and product QUALITY ASSURANCE Utilise the resources not a disposal action SAFE USE
  14. 14. Conclusion  Closing the loop  Protect — Human health — Animal health — Environmental health

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