Seitz filter

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

1. Presented by- Smriti Acharya B. Pharm (3 rd 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.

8. Sterile filtration and clarification. Air filtration Production of liquid dosage Alkaloids are separated from aqueous solution of their salt. application

9. advantages Simple to use. Filtration is rapid. For viscous solution they are more suitable.

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

11. Reference ndvsu.org/images/ StudyMaterials /Micro/Exercise-1-Micro.pdf https://youtu.be/4WdveoaURFU