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Course Outline

 

Particle, slurry and bed (filter cake) characteristics

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  • Particle size distribution (PSD)
  • Porosity
  • Solids concentration and density
  • Particle morphology (shape)
   
 

Pre-treatment of slurries

 
  • Coagulation
  • Flocculation
  • Thickening and classification
  • Filter aid for pre-coating and body feed
   
  Activity: Describe course expectations and particular operational, design, selection, application or other issues
   
 

Solid liquid separation (SLS) overview and classification

 
  • SLS driving forces
  • Clarification and thickening
  • Filtration
  • Centrifugation
   
 

Case studies

 

This section will examine case studies from different industries illustrating the various SLS equipments used and comparisons of different SLS methods.

   
 

Sedimentation fundamentals

 
  • Single particle settling
  • Hindered Settling
   
 

Sedimentation equipment and design variations

 
  • Thickener sizing
  • Clarifiers
  • Lamella clarifier/thickener
  • Conventional thickener
  • High rate thickener
  • Paste thickener
  • Other thickeners
   
 

Deep bed filtration/depth filtration

 
  • Principle
  • Design types
   
 

Cross flow and membrane filtration

 
  • Principle
  • Membrane filtration (micro-, ultra-filtration and reverse osmosis)
  • Membrane module design
  • Membrane fouling
  • Rotating cross flow filters
   
 

Activity

 

Description of solid liquid separation equipment and processes used within participants’ plants, operations or past experiences.

   
 

Sediment and cake filtration principles

 
  • Filtration theory
  • Operating parameters affecting cake filtration
  • Sediment and cake compression principles
   
 

Particle and cake washing principles

 
  • Cake washing principles and methods
  • Continuous cake washing
  • Re-slurry wash
  • Wash efficiency
  • Counter current washing and decantation
   
 

Cake deliquoring/drying

 
  • Desaturation mechanisms
  • Capillary force
  • Air flow during cake desaturation
   
 

Testing and filtration process design

 
  • Laboratory filtration testing
  • Pilot scale filtration testing
  • Testwork program considerations
  • Cycle time determination
   
 

Activity

  Sizing a vacuum and pressure filter based on test data
   
 

Filter selection/overview

 
  • Overview: Vacuum filter
  • Overview: Pressure filter
   
 

Continuous vacuum filter types

 
  • Drum filter
  • Disc filter
  • Belt filter
  • Pan filter
   
 

Pressure filter types

 
  • Bag and cartridge filer
  • Nutsch filter
  • Plate and leaf filter
  • Candle filter
  • Filter presses
  • Belt press filter
  • Screw presses
   
 

Filter trouble shooting case studies

  This section will examine examples of filter issues and methods for trouble shooting.
   
 

Centrifugal dewatering fundamentals

 
  • Water in packed beds
  • Centrifugal sedimentation
  • Centrifugal filtration
   
 

Centrifugal types

 
  • Batch filter centrifuges
  • Continuous filter centrifuges
  • Decanter/solid bowl centrifuges
  • Disc stack separator
  • Hydrocyclones
   
 

Equipment selection and combinations

 
  • Selecting thickeners, centrifuges and filters
  • Comparison of vacuum and pressure filters
  • Selection procedures
  • Thickener filter combinations
  • Filtrate polishing
   
 

Application overview

 
  • Coal dewatering
  • Flotation concentrate dewatering
  • Precipitate and leach residue dewatering
  • Tailings dewatering
  • Water and wastewater solid liquid separation
  • Special solid liquid separation applications
   
 

Activity

 

Review and analysis of SLS processes and trouble-shooting or problems occurring in participants’ plants, operations and experiences.

   
 

Filter media

 
  • Filter cloth
  • Screen, mesh and wedge wire
  • Cartridges
   
 

Wrap up and discussion

   
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