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The Nature and Handling of Organic Slurries

The Nature and Handling of Organic Slurries

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The Nature and Handling of Organic Slurries

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  1. The Nature and Handling of Organic Slurries Douglas W. Hamilton, Ph.D., P.E. Waste Management Specialist Oklahoma Cooperative Extension Service

  2. The Nature and Handling of Organic Slurries • Solids Speciation • Suspensions • Consistency • Rheology • Solids Settling • Flow of Suspensions in Pipelines

  3. Slurry: mixture of solids and liquids

  4. What is a solid? Liquid NO Remains after heating at 103o C for 24 hours Yes Solid Sample

  5. What is a solid? Liquid NO Remains after heating at 103o C for 24 hours Yes Solid Sample TS Mass of Solids Mass of Sample =

  6. Suspended or Dissolved ? Suspended NO Passes through 1.5 Micron Diameter Hole? Yes Dissolved Sample

  7. Hamilton D.W. 2011. Solids Content of Wastewater and Manure. OSU Factsheet BAE-1759. Stillwater, OK:Oklahoma Cooperative Extension Service.

  8. Suspended or Dissolved ? TSS Suspended NO Passes through 1.5 Micron Diameter Hole? Yes Dissolved Sample TS TDS

  9. Distribution of Suspended Solids Hamilton D.W. 2008. Solids separation in manure handling systems. Factsheet 10-02-02h inPork Industry Handbook. West Lafayette, IN:Purdue University

  10. Organic or Inorganic ? Fixed Solid Inorganic or Ash NO Volatilizes when heated at 550oC for 2 hours? Yes Volatile Solid Organic Sample

  11. Organic or Inorganic ? Fixed Solid Inorganic or Ash TFS NO Volatilizes when heated at 550oC for 2 hours? Yes Volatile Solid Organic Sample TS TVS

  12. Solids Species FSS TSS VSS TS TVS VDS TDS FDS

  13. Solids Species Crystal Particles FSS TSS Organic Particles VSS TS TVS VDS Soluble Organics TDS FDS Dissolved Salts

  14. Consistency D.W. Hamilton, 2011. Consistency of Manure/Water Mixtures, OSU Factsheet BAE-1751.Stillwater,OK: Oklahoma Cooperative Extension Service.

  15. USDA-NRCS. 1992. Agricultural Waste Management Field Handbook. Washington, D.C.: USDA Natural Resources Conservation Service.

  16. Rheological Definition of Consistency www.glossary.oilfield.slb.com

  17. Settling • Type I Discrete Particle Settling • Type II Flocculated Particle Settling • Zone or Hindered Settling • Compaction

  18. Particle Characteristics Fluid Characteristics Factors influencing Settling Collective Characteristics

  19. Settling • Type I Discrete Particle Settling • Type II Flocculated Particle Settling • Zone or Hindered Settling • Compaction

  20. Discrete Particle Settling

  21. Forces Acting on the Particle Fd = CdV2pd2 ρf 2 4 Fg =p d3 (rp- rf)g 6

  22. Stokes Law ( ) ( ) dg V2 4 3 Cd ρp – ρf = ρf

  23. Stokes Law ( ) ( ) dg V2 4 3 Cd ρp – ρf = ρf Cd = f (ρp,ρf,NFr)

  24. Stokes Law Cd = f (ρp,ρf,NFr,Nre)

  25. Stokes Law Cd = f (ρp,ρf,NFr,Nre,ψ)

  26. Particle Characteristics Density Size Shape Fluid Characteristics Density Viscosity Factors influencing Settling Collective Characteristics

  27. Settling • Type I Discrete Particle Settling • Type II Flocculated Particle Settling • Zone or Hindered Settling • Compaction

  28. Type II Settling

  29. Particle Characteristics Density Size Shape Charge Fluid Characteristics Density Viscosity Polarity Ionic Strength Factors influencing Settling Collective Characteristics

  30. Settling • Type I Discrete Particle Settling • Type II Flocculated Particle Settling • Zone or Hindered Settling • Compaction

  31. Zone Settling

  32. dx dt = Vc Zone Settling

  33. Particle Characteristics Density Size Shape Charge Fluid Characteristics Density Viscosity Polarity Ionic Strength Factors influencing Settling Collective Characteristics Concentration Size Distribution

  34. Settling • Type I Discrete Particle Settling • Type II Flocculated Particle Settling • Zone or Hindered Settling • Compaction

  35. dx dt = V Compaction

  36. Suspension of Slurries in Pipelines

  37. VM1= 134Cd0.816D0.633Vo1.63 VM2= 54.4Cd0.815D0.633Vo1.63

  38. Experimentally Derived Solution