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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
Helping People Help the Land
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
Helping People Help the Land
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
Helping People Help the Land
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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The U.S. Department of Agriculture (USDA) prohibits
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in employment or in any program or activity
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prohibited bases will apply to all programs and/or
employment activities.) Helping People Help the Land