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Solid liquid separation alternatives for manure handling and treatment


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For more: Solid-liquid separation of animal manures and other agricultural products can be an integral part of a livestock operation ranging from improved facility performance to enhanced nutrient management. A document entitled “Solid-Liquid Separation Alternatives for Manure Handling and Treatment” is being created through work by Clemson University and funding from USDA-Natural Resources Conservation Service. The purpose of this document is to assist in solid-liquid separation technology selection, evaluation of separation performance, and quantifying the impact of solid-liquid separation on manure management. This presentation will provide an outline of this document including methods of solid-liquid separation, influence of manure characteristics and handling methods, fundamentals of solid-liquid separation, performance of various solid-liquid separation technologies, separation enhancement methods, and design considerations. An overview of various farm scale separation technologies is also presented in the solid-liquid separation document.

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Solid liquid separation alternatives for manure handling and treatment

  1. 1. Solid-Liquid SeparationAlternatives for ManureHandling and TreatmentDocumentJeff PorterEnvironmental EngineerUSDA-NRCSHelping People Help the LandDr. John ChastainAssociate ProfessorClemson University
  2. 2. Objectives Background of the document Overview of the document Uses of the documentHelping People Help the Land
  3. 3. Progress NRCS Conservation PracticeStandards− > 160 standards− > 20 related to waste management Solid/liquid separation is the basisfor many of the other wastemanagement standards No good single document oninformation and planning ofsolid/liquid separation methodsHelping People Help the Land
  4. 4. Progress Piedmont – South Atlantic CoastCooperative Ecosystem Studies Unit(CESU) with Clemson University Dr. John Chastain, AssociateProfessor, School ofAgricultural, Forests andEnvironmental Sciences – PrincipleInvestigator Goal – 70 to 100 page documentoutlining solid/liquid wasteseparationHelping People Help the Land
  5. 5. To Date Still in draft with approximately 300pages Expected completion – June 2013 Handbook for NRCS staff and othersfor design guidance on the selectionand evaluation of solid/liquidseparation technologiesHelping People Help the Land
  6. 6. Content Methods of Solid/Liquid Separation− Methods based on density− Methods based on particle size Influence of Manure Characteristicsand Handling Methods on Selection− Animal Types− Benefits of Solid/Liquid SeparationHelping People Help the Land
  7. 7. Content Fundamentals of Solid/LiquidSeparation− Screening and entrainment− Settling theory Solid/Liquid Performance− Concentration reduction− Mass removalHelping People Help the Land
  8. 8. Content High Rate Separation Methods− Coagulants and Flocculants− Advanced innovative technologies Sand Separation− Sand laden manure− Mechanical methods− Non-mechanical methodsHelping People Help the Land
  9. 9. Content Other Separation Methods− Weeping wall− Geotextile (bio-bag)− Sand filtration Design Considerations− Single stage− Multiple stage− Cost/benefit considerationsHelping People Help the Land
  10. 10. Content Appendices− Overview of FPPC Solid/Liquidseparation projects− Guidelines for evaluating coagulantand polymer doseHelping People Help the Land
  11. 11. Uses/Users NRCS staff for planning animalwaste systems Design guidance on selection ofsolid/liquid separator technologies Evaluation of solid/liquid separatorperformance Outside sources− Other agencies− Universities− ConsultantsHelping People Help the Land
  12. 12. Where Do We Go From Here? Complete draft and review Review by NRCS editors Make available in NRCS NationalEngineering Handbook (location tobe determined)Helping People Help the Land
  13. 13. The U.S. Department of Agriculture (USDA) prohibitsdiscrimination against its customers, employees, andapplicants for employment on the bases ofrace, color, nationalorigin, age, disability, sex, genderidentity, religion, reprisal, and whereapplicable, political beliefs, marital status, familial orparental status, sexual orientation, or all or part of anindividuals income is derived from any publicassistance program, or protected genetic informationin employment or in any program or activityconducted or funded by the Department. (Not allprohibited bases will apply to all programs and/oremployment activities.)Helping People Help the Land