FILTRATION SPECIFICATIONS Filter: High Flow Filtration Systems
Overview of Cross-Flow Filtration Current Technology ... · What is Cross-Flow Filtration? • Also...
Transcript of Overview of Cross-Flow Filtration Current Technology ... · What is Cross-Flow Filtration? • Also...
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Overview of Cross-Flow Filtration Current Technology & Developments
Dave Gusmer- Gusmer Enterprises, Inc.
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Agenda
• What is Cross-Flow Filtration? • Review of Basic Design • Review of Applications • Advantages/Disadvantages • Sizing & Cost • Opportunities for Juice & Wine Lees • Tips on Buying
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What is Cross-Flow Filtration?
• Also called Tangential Flow Filtration “T.F.F.”
• Definition: Method of clarification where product flow is parallel to the filter surface to minimize clogging, and maximize efficiency
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•- Dead-end filtration
•- Cross flow filtration
•Wine to be filtered (dissolved components, in suspension, micro-organisms...)
• Filtered wine (dissolved components)
•« Cake » clogging
•RETENTATE: Wine to be filtered (dissolved components, in suspension)
•PERMEATE : Filtered wine (dissolved components)
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•Only part of the liquid crosses the membrane on each passage.
•Retentate = Coarse components, bigger than the diameter of the pores of the membrane and the raw wine.
•Filtrate (permeate) = Filtered wine.
•Filtrate
•Retentate
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-During the course of the filtration, your retentate is becoming more concentrated with solids
-At the end of the filtration, you are left with filtered wine, and your retentate with the solids
•Filtrate
•Retentate
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•Cross-Flow Filtration :
•Wine to filter
tank
•Filtered wine tank
•Feed pump
Circulationpump
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•Cross-Flow Removes Yeast and Bacteria:
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•Cross-Flow Allows Desireable Components to pass through the Membrane :
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What Size are the Particles in Wine?
• Grape Solids, Tartrates, Fining Agents – 100 to 1,000 microns
• Colloidal or Precipitated Proteins
- < 0.2 to 5 microns
• Yeast and Bacteria – 0.65 to 3 microns
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What is a Micron?
• 1 Millionth of a Meter • 1 Thousandth of a Millimeter • 39 Millionths of an Inch (0.000039 inch)
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Relative Particle Size
• Fine Beach Sand 500μm
• Mist 100μm
• Red Blood Cell 5 μm
• Yeast Cell 3 μm
●
• Bacteria Cell 0.65 μm
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History of Cross-Flow
• Cross-Flow Developed for the Food Industry in the 1940’s- Mainly Water Filtration
• Introduced to Wine Industry in the 1980’s
• Early Cross-Flow did not go well…
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Modifications to design allowed a comeback for Cross-Flow
• New Membrane Specifically for Wine • Back Flush System Improved to
Increase Flow Rates • Design Modification- Prevent Heating • More Efficient Cleaning • Fully Automated- Easier to Use
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Types of membranes
• Hollow Fiber • Spiral Wound • Ceramic
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A Unique Membrane
Membrane Specific for Wine
•Inner structure x 10 000 •Outer structure x 5000
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0.2 µm 0.2 µm
Permeate : Filtrate (dissolved compounds)
Why a .2 micron membrane?
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Flavy Cross Flow Micro Filtration FX Range Generalities 01/2009
Polyphenols
Deformation of the polyphenols through the pores
Re-stabilization in time
P
Comportment of Polyphenols
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Applications • Filtration of Juice prior to fermentation
(pectin free) • Arrest or prevent alcoholic or ML
Fermentation • Filtration after Fining • Pre-bottling Wine Preparation • Taking dirty wine (800 NTU or higher)
and end up with wine at 1.0 NTU or lower
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Cleaning
• With Back Flush you still need to clean • Caustic most common • Non chlorinated-Hydrogen Peroxide • Enzymes
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Advantages of Cross-Flow
• One Pass Filtration • Minimal Wine Transfer- less oxidation • Improved Wine Quality (flavor/aroma) • Minimal Color Loss
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Advantages of Cross-Flow • No Need for Filter Aids – Cost Savings • No Flavor Issues with DE/sheets • No Disposal Issues with DE/sheets • Avoids Health Issues with DE
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Advantages of cross-flow
• Time & Labor Savings- 1 x person • Minimal Wine Losses • Longer Membrane Life on Cartridges • Fully Automated • Can Run Unit Overnight
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Disadvantages
• Initial Cost for Equipment • Slower Flow Rates than DE or sheets • Module Replacement is Expensive • Bentonite will Plug Membranes • Less Control over Filtration
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Sizing & Cost
• Smaller Units 150-350 gallons/hour • Starting cost around $ 25,000 • Difficult to compare Vendors • Larger Units go up to 15,000 GPH • Many Filters are Expandable
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Status of cross-flow industry
• 800-1,000 Cross Flow Filters in U.S. • Approximately 13 Vendors • Mobile Cross Flow Filtration Available
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Opportunities for Juice Lees
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Juice Lees
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Wine Lees…
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Opportunities for Wine Lees
• Filters can Tolerate Fining Agents • Higher Quality of Wine Lees • Minimal Losses • No DE • Less Labor than RDV
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Tips on Buying
• Winery References- Great Resource • Compare against DE/Filter Sheets • Demo the Worst Case Wine! • Give Wine Time to Recover • Make sure Water is Clean • Check the Fine Print…
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Tips on Buying • Spreadsheet for Cost Justification • Turbidity Meters- Highly Recommend • Ask about Servicing! • Pre-filters (bug catchers) for inlet • Membranes not Interchangeable
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QUESTIONS?
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Thank You!