Technology Type - Sand Separation - Critical Indicators



Technology Strengths,Weaknesses and Critical Indicators

Sand Separation:  

  • Used on Vacuumed/scraped manure and manure slurries with limited water addition
  • Economics can be attractive depending on post-treatment and sand price
  • Dairies that use sand for bedding believe that the sand improves the comfort and productivity of the milking herd
  • Removal of sand particles can save significant wear in down-stream equipment
  • Reusing sand form a separator for bedding can reduce farms total bedding costs
  • Can increase manure volume based on the amount and source of water used for dilution
  • Reused sand must be handled properly to ensure that pathogens and moisture are not reintroduced into the barn

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Overall Summary

Primary Application

  • Dairy farms with sand bedding
  • Vacuumed/scraped manure and manure slurries with limited water addition

Economic/Return on Investment Considerations

  • Economics can be attractive depending on the post-treatment processes and the price paid for sand bedding
  • Most dairies that use sand for bedding believe that the sand improves the comfort and productivity of the milking herd

Industry Uptake

  • 250 dairy-based U.S. installations and more worldwide.

Technology Maturity

  • Refined, mature, proven technologies.

Primary Benefits

  • Removal of heavy and abrasive sand particles that can cause significant wear in down-stream equipment.

Secondary Benefits

  • Reusing sand form a separator for bedding can reduce farms total bedding costs

How it Works

  • Sand separation technology operates on the difference in mass between the grains of sand and the other solids present in the manure
  • The manure/sand mixture is transported to the separation site where water is added to reduce the viscosity of the fluid and allow the heavier sand grains to settle out of the total solutions.
  • Liquid manure can flow out of the system for downstream processing.
  • Sand is removed from the separator mechanically by auger, front-end loader or gravity in some cases.

Pre-treatment and/or Post-treatment Required

  • Pre-treatment not required
  • Post-treatment not required but may be employed based on overall goals of the manure treatment system.

Limitations

  • Does not reduce volume and can increase volume based on the amount and source of water used for dilution.

Other Considerations

  • Reused sand must be handled properly to ensure that pathogens and moisture are not reintroduced into the barn if the sand is recycled for bedding.

 


References

Technology Providers in order of 9 - Point Scoring System

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