**About the Editors**

### **Gassan Hodaifa**

Gassan Hodaifa (H-Index 24 in Web of Science) is a Food Engineer (Univ. De Albaath, Syria), Chemical Engineer (Univ. Of Granada) and Doctor, University of Jaen in Doctoral Program: ´ Biotechnology and Agri-Food Engineering. His research began in 1997 with a predoctoral fellowship for work carried out in Spain, and he joined the research group "Bioprocesses TEP-138 (J. Andaluc´ıa)"and worked in the fields of Microalgae, Treatment of Wastewaters, Chemical Oxidation, Membrane Technology, Adsorption, Pesticide Removal, Olive Oil Processing, Enzyme Biotechnology and Nematode Biotechnology. He participated in 27 research projects (8 as IP), 4 of which were European (1 PRIMA Project and 3 in collaboration with M.A.P.A. and the INFAOLIVA and UNAPROLIVA companies), with which he signed 16 research contracts (4 as IP). Two contracts were as an Adviser for the Mega Japanese Company "Asahi Kasei Corporation", six projects were financed by J. Andaluc´ıa (two of them as IP), five projects were with the National Research Plan, one was a project of Madrid Community, and the rest were with companies. His research work includes 64 published articles, 56 articles published in *JCR* (31 in Q1, 18 in Q2, and 7 in Q3; of these articles, more than 10 were published in collaboration with authors from different countries on all continents; total articles in Open Access Journals: 6), 4 articles in journals with impact factors, and 5 other articles in outreach magazines to society. Two patents for the water purification of olive oil mill wastewater, 2 books, 46 book chapters with prestigious publishers such as Academic Press (Elsevier), CRC Press, Taylor and Francis Group, Springer International Publishing AG etc. He published, as an Editor-in-Chief, two Special Issues in *J. Chemistry* and *Catalysts* both from *JCR*. He has participated in 125 Congresses. He is currently a member of 15 Editorial Boards of International Journals such as *Catalysts*, *Heliyon*, etc.

### **Rafael Borja**

Rafael Borja is Doctor (PhD) in Chemical Sciences. Since 1986 he has been working as a researcher at the Instituto de la Grasa (CSIC, Spanish National Research Council) in Seville, after obtaining an FPI grant funded by the Andalusian Government for the Doctoral Thesis. San Alberto Magno Prize for Doctoral Theses awarded by the National Association of Spanish Chemists (ANQUE), Delegation of Andalusia in 1991. During the period September 1992 - September 1994, he made a postdoctoral stay at the "Environmental Technology Centre"belonging to the "Department of Chemical Engineering"of the "University of Manchester - Institute of Science and Technology (UMIST)"of Manchester, United Kingdom. In 1997 he obtained the position of Tenured Scientist of the CSIC, developing since then several lines of research related to the use and treatment of wastewaters and solid wastes from agro-food industries. In 2008 he obtained the position of Research Scientist at the CSIC. He has directed 6 Doctoral Theses and is a co-author of 8 patents. He has published 302 articles in different scientific journals included in the "Science Citation Index (SCI)". According to the database Scopus he has an index h of 56 (January 2023). According to this same database, it has a total number of 10,483 citations (January 2023).

He has been the principal investigator of 12 projects funded by the R&D National Plan and by the European Union, as well as several R&D contracts developed at the Instituto de la Grasa (CSIC) in Seville. He currently is a member of the Editorial Board of the scientific journals "Process Biochemistry"(Elsevier), "Catalysts"(MDPI) and "Emerging Science Journal (Ital Publication)". During the period 2013-2015 he was vice-president of the association "International Association of the Mediterranean Agro-industrial Wastes (IAMAW)"located in Perugia, Italy, and from 2016 to 2019 he was a member of the "Audit Committee"of this Association.
