Most of Prof. Oren’s past scientific activity focused on electrochemical-related issues. Within these activities it is possible to identify three different directions: studies in electrochemical methods in relation to treatment of water and waste-water, investigating mass transfer in electrochemical processes and investigating hydrogen transport to metals using electrochemical tools. Within the area of electrochemical water treatment processes, unique and pioneering work was conducted on understanding the electrochemistry of carbon and graphite electrodes, in particular, the double-layer behavior of these materials. Electrosorption of bacteria and colloidal particles and removal of heavy metals on these electrodes were also investigated. Electrodialysis, which is also an electrochemically driven water desalination process, was studied in the early stages of Dr. Oren’s scientific career Most of the work was directed towards the understanding of current distribution at different electrode shapes under diffusion limiting conditions and impinging solution jets. Electrochemical studies conducted on the hydrogen-metal system have been devoted mainly to understanding hydrogen transport to a metal, through surface oxides. These investigations led to the development of the electrochemical-dilatometry concept, an extremely sensitive method for measuring hydrogen transport kinetics to and within metals. Current activities in which he is involved include electrodialysis studies; developing novel methods for preparation of highly conductive ion exchange membranes by using high electric fields; understanding transport mechanisms in RO and NF membranes using electrochemical techniques and measuring electrochemical phenomena; developing a novel, efficient water softening process as a pretreatment for membrane driven water treatment processes to reduce fouling and increase recovery. Future investigations include electrical phenomena related to electrodialysis as well as to pressure driven membrane processes. Understanding the effect of the structure of heterogeneous ion exchange membranes on interfacial polarization and fouling is of prime importance with respect to optimizing electrodialytic water desalination. In addition, ion transport processes in the membrane inter-space, in particular when brackish water desalination is considered, will be a subject for intensive study. In pressure driven processes, particularly RO and NF, the importance of electrical phenomena originating from surface charges in the active layer in determining salt and organics rejection is recognized. These membranes are therefore also currently subject to intensive study. A continuation of earlier investigations into electrosorption towards water treatment is also planned, using novel types of high surface area conductive materials such as carbon nanotubes. Prof. Oren joined the Department for Desalination and Water Treatment, ZIWR, in May 2002, and in October 2002 he was appointed head of the group, serving in this position until his retirement on September 2012.
Desalination and Water Treatment
Curriculum Vitae 1991-1999: University of Twente, Ordinarius Institute of Membrane Technology 1988: Professorship at the University of Stuttgart 1982-1992: Fraunhofer Institute IGB, Stuttgart 1982: Habilitation, at the University of Tübingen 1971 – 1982: Forschungsinstitut Berghof GmbH, Tübingen 1965 – 1971: Amicon Corp., Lexington, Mass., USA 1961 – 1965: Doctorate at RWTH Aachen University 1956-61: Chemistry studies at the University of Darmstadt Awards and memberships: 2008: Richard Maling Barrer Prize of the European Membrane Society 2005: Honorary Professor South China Central University 1998: Willy Hager Price and Medial in Gold 1976: DECHEMA, Frankfurt, 1984 European Membrane Society Scientific Advisory Board: 2003: Middle East Desalination Research Center, Oman 2003: UN University of Environmental Science, Gwangju, Korea 1993 – 1998: UNESCO Center for Membrane Technology, Sidney, Australia
Synthetic membranes, their manufacture and technical use
Li-Zhi Zhang is a Professor at South China University of Technology (Guangzhou, China), the winner of the National Science Fund for Distinguished Young Scholars of China. He has worked with Membrane Science, Heat and Mass Transfer, and advanced humidity control technologies since 1992. Li-Zhi Zhang has published more than 100 SCI papers in international journals. They were cited more than 2000 times on SCI, and his current H-index is 35. He has authored 5 books in advanced humidity control and heat and mass transfer. His book titled “Conjugate Heat and Mass Transfer in Heat Mass Exchanger Ducts” was published by Academic Press, Elsevier, in 2013. He was awarded 10 patents, among which two have been industrialized. He is currently the editors or the members of the editorial boards for 3 SCI international journals: Energy and Buildings (IF 2.47); Indoor and Built Environment (IF 1.7), Thermal Science (IF 0.96). He is the fellow of the Society of Indoor Environment and Health of China; and the fellows of Chinese Heat and Mass Transfer Society and Chinese Multi-phase Flow Society. He won the first grade prize for natural science of Education Ministry of China in 2011.
Education in Chemical Engineering Jan 1994 – Jul 1998: Doctor of Philosophy, Indian Institute of Technology Madras, Chennai, India, Thesis title: Model Predictive Control of Chemical Processes using Nonlinear Laguerre Models. Jul 1992 – Dec 1993: Master of Technology, Indian Institute of Technology Madras, India, Specialization: Chemical Process Modelling and Control. Jul 1988 – Jun 1992: Bachelor of Engineering, Jadavpur University, Calcutta, India. Experience in Indian Institute of Technology Guwahati Jan 2013 – Till date: Professor, Department of Chemical Engineering. Nov 2008 – Dec 2012: Associate Professor, Department of Chemical Engineering. Oct 2003 – Oct 2008: Assistant Professor, Department of Chemical Engineering. Past affiliations Feb 2002 – Sep 2003: Research Officer, Cranfield Universiy, England, Department of Process and Systems Engineering. Aug 2000 – Jan 2002: Chemical Engineer, General Electric, USA, Corporate R&D at John F. Welch Technology Centre, Bangalore. Jul 1998 – Jun 2000: Research Engineer, National Universiy of Singapore, Department of Chemical & Biomolecular Engineering. Research Interests Process Engineering: • System Identification, Modelling based on Orthogonal Basis Function, Wiener-Hammerstein Strategy, Neuro-Fuzzy Learning Scheme, Wavelet Network. • Control Systems, Controllability and Stability Analysis, H2/H1 Optimal Control, Model Predictive Control, Internal Model Control. Separation Process: • Liquid Membranes, Recovery of Bioactive Compounds, Removal of Heavy Metal. • Others, Amine based CO2 Absorption.
Process Engineering, Separation Process