30 Questions
What is the primary purpose of a filter medium in a clarification process?
To retain solids
What is a desirable characteristic of a filter medium in cake filtration applications?
Retention of solids without plugging
Why is it essential for a filter medium to be chemically and physically inert?
To prevent contamination
What type of materials are commonly used to weave filter fabrics?
Synthetic and natural fibers
What is a key consideration when selecting a filter medium?
Past experience and technical services
What is a characteristic of ideal filter media in clarification applications?
Easy cake discharge
What is a primary characteristic of high flow rate filters?
Low pressure drop
What type of filter is recommended for gelatinous solutions or fine particulate matter?
Felts of natural or synthetic material
What is the primary advantage of ceramic cartridges?
Being cleanable for reuse by back-flushing
What is the purpose of prefiltration in membrane filtration?
To avoid rapid clogging of the membrane
What is the primary function of surface-type cartridges in hydraulic lines?
Filtration of hydraulic lines in processing equipment
What determines the selection of a membrane filter for a particular application?
Size of the particle or particles to be removed
What type of solids require a precoat of filter aids on the drum prior to filtration?
All of the above
What is a characteristic of rotary disc filters?
Low floor space and low cost of filtration
What affects the filtration rate in pressure filters?
Only the properties of the slurry
What is a disadvantage of pressure filters?
They are mechanically complex and expensive
What is a typical solids content for precoat filters?
Less than 2–3%
What is the operating sequence of a disc filter similar to?
A drum filter
What is the primary objective of using a plate and frame filter press in 'batch' mode of operation?
To obtain a high degree of clarification of the fluid
What is the significance of the frame space in cake filtration?
It is critical for the size of the sludge collected
What is the advantage of the filter press in terms of its material of construction?
It can be chosen to suit any process conditions
What is a characteristic of the filter press that makes it versatile?
The number and type of filter sheets can be varied to suit a particular requirement
What is the purpose of the conduits in the plate and frame filter press?
To remove the filtrate
What is the characteristic of the disc filter?
It consists of felt or paper discs sealed into a pressure case
What is the primary purpose of ultrafiltration in the pharmaceutical industry?
To concentrate heat-labile products such as vaccines and immunoglobulins
What is the difference between microfiltration and ultrafiltration?
Microfiltration removes bacteria, while ultrafiltration separates molecules
What determines the selectivity and retentivity of a membrane?
Molecular weight cut off
What is the most important application of ultrafiltration?
Removing pyrogens
What is a key feature of ultrafiltration membranes?
They retain most macromolecules while allowing smaller molecules to pass through
What is an important feature of filtration systems?
They can be tested for integrity before and after each filtration
Learn about the importance of filter media in pharmacy, including the ideal characteristics of filter materials and how pharmacists can make informed selections. Discover the various options available and how to navigate the selection process. Test your knowledge of filter media in pharmacy!
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