Dr. Sri Harsha E

Title:  Microfiltration Studies Using Low Cost Ceramic Membranes
 
Supervisors: Prof. R. Uppaluri and Dr. M. K. Purkait
 
Abstract:
 
In the Ph.D. thesis, firstly, low cost ceramic membranes were prepared using uniaxial dry compaction method.  A unique inorganic precursor composition was identified with which microfiltration range membranes were fabricated with an average pore size and porosity of 3.06 - 2.16 microns and 30.1  - 37.4 % respectively. Eventually, the prepared membranes were investigated using dead end and cross flow Microfiltration setups for the separation of oil-water emulsions. Since the obtained membrane pore size is significantly high, the thesis furthered towards the identification of another unique low cost precursor composition using kaolin as a main ingredient to achieve membranes with lower pore size of 1.69 - 0.72 microns. The prepared membranes were extensively tested for the dead end and cross flow microfiltration of centrifuged (CJ) and enzyme treated centrifuged (ETCJ) juice samples of mosambi, orange and pineapple fruit juices. The obtained data indicated very good performance of the membrane with an average pore size of 0.72 microns, which gave excellent performance for ETCJ samples. The fouling index values were also calculated, which have not been reported till date in the literature. Overall the thesis can be regarded as a good guide for those who are interested to develop and apply low cost ceramic membranes (using kaolin etc.,) for the separation of oil-water emulsions and for mosambi, orange and pineapple juice clarification.
 
Publications:
  1. E. Sriharsha, R. Uppaluri, M.K. Purkait, Preparation and characterization of low cost ceramic membranes for mosambi juice clarification, Desalination, 317 (2013) 32 - 40.
  2. E. Sriharsha, R. Uppaluri, M.K. Purkait, Microfiltration of oil - water emulsions using low cost ceramic membranes prepared with uniaxial dry compaction method, Ceramic International, 40 (2014) 1155 - 1164.
  3. E. Sriharsha, R. Uppaluri, M.K. Purkait, Cross flow microfiltration of oil - water emulsions using kaolin based low cost ceramic membranes, Desalination, 341 (2014) 61 - 71.