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#صناعيةنظري ملخص الاجزهة بجابتر ال filtration
1) Gravity filters
Type of driving force: gravity
Notes: give low filtration rates
simple , cheap
used for small scale laboratory filtration
2) Vacuum filters
Type of driving force: vacuum
General notes: used for large scale
cannot be used for cake filtration or sterile filtration
Continuous operation
Types: Rotary drum filter and rotary disc filter
Rotary drum filter
Type of driving force: vacuum
Notes: each filter unit rectangular in shape
Rotary disc filter
Type of driving force: vacuum
Notes: Is less floor space and requires lower cost
3) Pressure filters
Type of driving force: pressure
General notes: batch and continuous operation
Have disadvantage that the cake are difficult to remove and it’s complex and expensive
Types: Plate and frame filter press and pressure disc filters
Plate and frame filter press
Type of driving force: pressure
Notes: Can be used for cake filtration
Disadvantages include costs in assembly and cleaning
Pressure disc filters
Type of driving force: pressure
Notes: Advantages are compactness,portability and cleanliness
4) Centrifugation filtration
Type of driving force: centrifugation
Notes: Have the advantages of effective washing and drying
Can be used for cake filtration
Type: Perforated basket
5) Sterilization filtration
Type of driving force: pressure
Notes: Type of filter media is membrane filter
Porosity 0.2micron and 0.45micron
Can be used for intravenous, ophthalmic and other aqueous products
BY امتحن نفسك
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