Filtration topic. seitz filter . easiest description for seitz filteration. the laboratory based filtration types.

1. Presented by- Smriti Acharya
B. Pharm (3rd year) , Nobel college
SEITZ FILTER

2. CONTENT
• Introduction
• Principle
• Construction
• Working
• Application
• Advantages
• Disadvantages
• Reference

3. INTRODUCTION
• It lies under Laboratory scale filtration.
• A filter disc with pores so fine that they will not permit passage
of bacteria; solutions emerge sterile.
• Microbiological Definition- A bacterial filter made of asbestos
and used to sterilize solutions without the use of heat.

4. PRINCIPLE
• Based on sieve-like mechanism, through asbestos pad filter
disc.
• As we pour the slurry, liquid material passes while solid material
remains on the upper part.
• Asbestos is the filter disc used here ,so can be known as
asbestos filter also.

5. CONSTRUCTION

6. • It consists of a-
• Funnel like structure, upper part, asbestos pad filter disc and
lower part.
• Filter disc is of around 2mm thick.
• Chrysotile fibers are generally used. Amphibole varieties are
sometimes employed.
• Material is absorbed under filter media.
• Cake is formed in the filter media.
• Valve on the upper part through which vacuum is applied.
• Large type of seitz filters can take 20cm square filter pads
where 8 sets of paired pads can be fitted.

7. WORKING
• Filtration is observed upward to downward.
• Similar to depth filtration.
• Add slurry from upper part.
• Slurry deposit on asbestos part and filtrate is passed through it.
• The finest pore size gives almost perfect filtration and retain
small viruses.
• Due to pressure difference across the filter, fluid flows through
the filter medium.

9. • Sterile filtration and clarification.
• Air filtration
• Production of liquid dosage
• Alkaloids are separated from aqueous solution of their salt.
APPLICATION

10. ADVANTAGES
• Simple to use.
• Filtration is rapid.
• For viscous solution they are more suitable.

11. DISADVANTAGES
• Pads are expensive, a new pad must be used for each filtration.
• Asbestos may shed loose fibres.
• Delicate and fragile.

12. REFERENCE
• ndvsu.org/images/StudyMaterials/Micro/Exercise-1-Micro.pdf
• https://youtu.be/4WdveoaURFU