Professor Ajay K. Ray, Chair of Chemical and Biochemical Engineering Department at Western University, has made seminal research contributions in industrial process modeling and optimization; development of solar photocatalysis; and advancement of simulated moving bed technology for reactive separation. Dr. Ray has contributed to enhance engineering knowledge by devising innovative approaches to enhance process performance for applications in energy, environment, food and health, the key challenges facing the world. Dr. Ray is a prolific author, having written a text book on Engineering Mathematics and over 150 research articles in archival journals. The impact of his work is evident from high h-index and citations received. He has mentored over 50 graduate students. He is member of the editorial board of journals, recipient of the Research, Teaching and Faculty Scholars award, CrayQuest award, Distinguished Speakers award, and Distinguished Alumni award from Calcutta University

1. Introduction
2. Distillation
3. Gas Absorption and Stripping
4. Humidication Operations
5. liquid-LIQUID Extraction
6. Evaporation
7. Crystallisation
8. Drying
9. Adsorption
10. Ion Exchange
11. Chromatographic Separations
12. Membrane Separation Processes
13. Leaching
14. BioSeparations