solid liquid separation alternatives for manure handling and treatment
TRANSCRIPT
Solid-Liquid Separation Alternatives for Manure Handling and Treatment
Document
Jeff PorterEnvironmental Engineer
USDA-NRCS
Helping People Help the Land
Dr. John ChastainAssociate ProfessorClemson University
Objectives
Background of the document
Overview of the document
Uses of the document
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Progress
NRCS Conservation Practice Standards
−> 160 standards
−> 20 related to waste management
Solid/liquid separation is the basis for many of the other waste management standards
No good single document on information and planning of solid/liquid separation methods
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Progress
Piedmont – South Atlantic Coast Cooperative Ecosystem Studies Unit (CESU) with Clemson University
Dr. John Chastain, Associate Professor, School of Agricultural, Forests and Environmental Sciences – Principle Investigator
Goal – 70 to 100 page document outlining solid/liquid waste separation
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To Date
Still in draft with approximately 300 pages
Expected completion – June 2013
Handbook for NRCS staff and others for design guidance on the selection and evaluation of solid/liquid separation technologies
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Content
Methods of Solid/Liquid Separation
−Methods based on density
−Methods based on particle size
Influence of Manure Characteristics and Handling Methods on Selection
− Animal Types
− Benefits of Solid/Liquid Separation
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Content
Fundamentals of Solid/Liquid Separation
− Screening and entrainment
− Settling theory
Solid/Liquid Performance
− Concentration reduction
−Mass removal
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Content
High Rate Separation Methods
− Coagulants and Flocculants
− Advanced innovative technologies
Sand Separation
− Sand laden manure
−Mechanical methods
−Non-mechanical methods
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Content
Other Separation Methods
−Weeping wall
−Geotextile (bio-bag)
− Sand filtration
Design Considerations
− Single stage
−Multiple stage
− Cost/benefit considerations
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Content
Appendices
−Overview of FPPC Solid/Liquid separation projects
−Guidelines for evaluating coagulant and polymer dose
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Uses/Users
NRCS staff for planning animal waste systems
Design guidance on selection of solid/liquid separator technologies
Evaluation of solid/liquid separator performance
Outside sources
−Other agencies
−Universities
− Consultants
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Where Do We Go From Here?
Complete draft and review
Review by NRCS editors
Make available in NRCS National Engineering Handbook (location to be determined)
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