Ulku Yetis, PhD
Professor of Environmental Engineering

Middle East Technical University (METU)
Ankara, Turkey
Phone: (90) 312 210 5868
Email: uyetis@metu.edu.tr


Ph.D. METU, Department of Environmental Engineering 1988
M.S. University of Pittsburgh, Department of Chemical Engineering 1982
B.S. METU, Department of Chemical Engineering, 1981


Dr. Yetisreceived the B.S. and M.S in chemical engineering from Middle East Technical University (METU), Turkeyand from University of Pittsburgh, respectively. She earned Ph.D in environmental engineering from METU in 1988. Dr. Yetiscurrently holds the position of Full Professor at METU, Turkey. She worked as the chairperson of the Environmental Engineering Department of METU from 1998 to 2003. She currently serves as a consultant to several consulting companies and carries out projects on the development of strategies for the management of point and diffuse pollution sources in selected river basins in Turkey. She has published to date 84articles in refereedinternational journals. Additionally, she has published more than 50 technical reports on research conducted for private industry and national organizations.Dr.Yetis’ research has focusesmainly on physicochemical water and wastewater treatment processes, and hazardous waste management.

Research Interest

Dr. Yetis’s primary research interests are in the applications of physiochemical processes in water, wastewater and hazardous waste treatment. Currently, her research focuses on the applications of membranes processes for drinking water treatment and industrial wastewater treatment/reclamation, micro pollutants in surface waters, and the application of advanced oxidation processes for the removal of these pollutants.

Scientific Activities

Professional Experience
9/1998 -to date METU, Environmental Engineering Department, Professor
10/1992- 9/1998 METU, Environmental Engineering Department, Associate Professor
3/1988 - 10/1992 METU, Environmental Engineering Department, Assistant Professor
3/1985 - 3/1988 METU, Environmental Engineering Department, Instructor
1/1988 - 3/1985 METU, Environmental Engineering Department, Research Assistant      
9/1981 - 8/1982 University of Pittsburgh, Department of Chemical Engineering Research Assistant
Administrative Positions
2015 –04/2017 MUDEK- Association for Evaluation and Accreditation of Engineering Programs, Vice President
04/2013 – 04/2015 MUDEK- Association for Evaluation and Accreditation of Engineering Programs, Executive Board Member
10/1998 – 11/2003 METU Environmental Engineering Department, Chairperson
02/2000 – 02/2001 Member;Earth, Marine, Atmosphere, Fishery and Environmental Sciences Grant Committee, TUBİTAK
11/1999 – 2010 Member, METU Engineering Faculty Research Committee
11/1997 – 10/1998 Assistant Chairman, Department of Environmental Engineering, METU
10/1994 – 10/1995 METU, Graduate School of Natural and Applied Sciences, Interdisciplinary Graduate Program in Biotechnology, Division Head


Papers in Refereed International Journals
  1. Orhon, A. K., Orhon, B., Yetis, U., Fate of Triclosan in Laboratory-scale Activated Sludge Reactors -Effect of Culture Acclimation, Journal of Environmental Management, In press.
  2. Öncel, M.S., Bektaş, N., Bayar, S., Engin, G., Çalışkan, Y., Salar, L., Yetis, U., Hazardous wastes and waste generation factors for plastic products manufacturing industries in Turkey, Sustainable Environment Research, In press.
  3. Yukseler, H., Uzal, N., Sahinkaya, E., Kitis, M., Dilek, F.B., Yetis, U., Analysis of the Best Available Techniques for Wastewaters from a Denim Manufacturing Textile Mill, Journal of Environmental Management, In press.
  4. Yilmaz, O., Kara, B.Y., Yetis, U., Hazardous waste management system design under population and environmental impact considerations, Journal of Environmental Management, 203, December 2017, 720-731.
  5. Erkanlı, M., Yilmaz L., Yetis, U., Emecen-Culfaz, Z., Brackish water recovery from reactive dyeing wastewater via ultrafiltration, Journal of Cleaner Production, 165, November 2017,1204-1214.
  6. Civancik, D., Yetis, U., Substance Flow Analysis of Mercury in Turkey for Policy Decision Support, Environmental Science and Pollution Research, In press.
  7. Ozturk, E., Koseoglu, H., Karaboyacı, M., Yigit, N.O., Yetis, U., Kitis, M., Sustainable textile production: cleaner production assessment/eco-efficiency analysis study in a textile mill, Journal of Cleaner Production, 138, December 2016, 248-263.
  8. Cakır, N., Alp, E., Yetis, U., Evaluation of Environmental Performance Based on Proximity to BAT Associated Resource Utilization and Emission Values: A Case Study in A Steel-Making Industry, Waste and Biomass Valorization, 7, 4, 975-993, Aug. 2016.
  9. Babuna, G.F., Toroz, I., Avsar, E., Yetis, U., “Hazardous waste generation in Turkish pesticide industry”, Desalination and Water Treatment, 57, 54, 26280-26285, Nov. 2016.
  10. Morali, K., Uzal., N., Yetis, U.,  Ozonation pre and post-treatment of denim textile mill effluents: effect of cleaner production measures Journal of Cleaner Production, Journal of Cleaner Production, 137, 1-9, November 2016.
  11. Olmez, G.M., Dilek, F.B., Karanfil, T., Yetis, U., The environmental impacts of iron and steel industry: a life cycle assessment study, Journal of Cleaner Production, 130, 1 September 2016, 195-201.
  12. Ozturk, E., Koseoglu, H., Karaboyacı, M., Yigit, N.O., Yetis, U., Kitis, M., Minimization of Water and Chemical Use in a Cotton/Polyester Fabric Dyeing Textile Mill, Journal of Cleaner Production, 130, 1 September 2016, 92-102.
  13. Ogutverici,A.,Yilmaz, L., Yetis, U., Dilek, F.B., Triclosan removal by NF from a real drinking water source – Effect of natural organic matter, Chemical Engineering Journal, 283, 330-337, 1 January 2016. 
  14. Yetis, U., Jakobsen,J.B., Dilek, F.B., Kıyık, E., Mugoša, S., Novović, J., Kerestecioglu, M., Solid Waste Management Scenarios For Cetinje in Montenegro", Waste Management & Research, 33(5), 477–485, 2015.
  15. Varol C., Uzal N., Dilek F.B., Kitis M., Yetis U. Recovery of caustic from mercerizing wastewaters of a denim textile mill. Desalination and Water Treatment, 53 (12), 3418-3426, March 2015.
  16. Yavuz, M., M.R., Oggioni, Dilek,F.B.,Yetis, U., Biocides in Drinking Water System of Ankara, Turkey. Desalination and Water Treatment, 53(12), 3253-3262, March 2015.
  17. Ozturk,E., Karaboyacı, M., Yetis, U.,  Yigit, N.O., Kitis, M., Evaluation of Integrated Pollution Prevention Control in a textile fiber production and dyeing mill, Journal of Cleaner Production, 88, 116-124, February 2015.
  18. Germirli-Babuna, F., Toroz, I., Avsar, E., Yetis U., Hazardous Waste Generation in Pesticide Synthesis Sector in Turkey, Pesticide Research Journal, 26(2): 181-188, December 2014.
  19. Koc, A.,Orhon,K.B., Ogutverici, A., Yılmaz, L., Furi, L., Oggioni, M.R., Dilek, F.B.,Yetis, U., Is Adsorption an Artifact in Experimentation with Triclosan?, Desalination and Water Treatment, 52 (37-39), 7101-7107, November 2014.
  20. Ozturk E., Karaboyaci M., Koseoglu H., Yigit N.O.,  Yetis U.,  Kitis M., Water and chemical management studies for cleaner production in a textile industry, Chemical Engineering Transactions, 39, 493-498, 2014.
  21. Tunç, M.S., Yılmaz, L., Yetis, U., Çulfaz-Emecen, Z., Purification and concentration of caustic mercerization wastewater by membrane processes and evaporation for reuse, Separation Science and Technology, 49, 1968–1977, August 2014.
  22. Yilmaz O., Can, Z.S., Toroz I., Dogan, O., Oncel, S., Alp, E., Dilek, F.B., Karanfil, T., Yetis, U., Use of Theoretical Waste Inventories in Planning and Monitoring of Hazardous Waste Management Systems, Waste Management and Research, 32(8), 763-771, August 2014.
  23. Yetis, U., Yukseler, H., Valatka, S., Girgin, S., Semeniene, D., Kerestecioglu, M., Jacobsen, M., “Implementation of the European Union’s Nitrates Directive in Turkey”, Desalination and Water Treatment, 51(19-21), 4171-4182, March 2013.
  24. Kentel, E., Aksoy, A., Buyuker, B., Dilek, F.B., Girgin, S., Ipek, M. H., Polat, S., Yetis, U., Unlu, K., Challenges in Development and Implementation of Health Risk-Based Soil Quality Guidelines: Turkey’s Experience, Risk Analysis, 31(4) 657-667, April 2011.
  25. Yigit,C.,Maden,G., Disa, N., Yılmaz, O., Ogutverici, A., Alp,E.,Unlu,K., Gokçay,C.F., Dilek,F.B., Doğan,O., Karanfil,T., Yetis, U., Hazardous Waste Management in Turkey: Current Legislative Requirements and Future Challenges, Desalination and Water Treatment, 26 (1-3) 152-159, Feb 2011.
  26. Yilmaz, O.,  Dogru, B., Yetis, U., Current practices in hazardous waste management in Turkey, Desalination and Water Treatment, 26 (1-3) 111-117, Feb 2011.
  27. Dogan, B., Kerestecioglu, M., Yetis, U., Assessment of the Best Available Wastewater Management Techniques for a Textile Mill: Cost and Benefit Analysis, Water Science and Technology, 61(4) 963-970, February 2010.
  28. Alp, E., Yetis, U., Application of the contingent valuation method in a developing country: a case study of the Yusufeli Dam in Northeast Turkey, Water Science and Technology, 62(99-105), January 2010.
  29. Uzal,N., Yılmaz, L., and Yetis, U, Nanofiltration and Reverse Osmosis for Reuse of Indigo Dye Rinsing Waters,  Separation Science and Technology, 45(331-338), 2010.
  30. Kocabas, A.M., Yukseler,H.,Dilek,F.B.,Yetis, U., Adoption of European Union's IPPC Directive to a textile mill: Analysis of water and energy consumptionJournal of Environmental Management, 91, 102-113, 2009.
  31. Yukseler, H., Girgin, S., Yetis,U., Valatka, S., Semeniene, D., Kerestecioglu, M., Jacobsen, M., Implementation of the European Union's Bathing Water Directive in Turkey, Journal of Environmental Management, 90(8), 2780-2784, June 2009.
  32. Yigit, N.O., Uzal, N., Koseoglu, H., Harman, İ., Yukseler, H., Yetis, U., Civelekoglu, G., and Kitis, M., Treatment of a denim producing textile industry wastewater using pilot-scale membrane bioreactor, Desalination, 240 (1-3), 143-150, 15 May 2009
  33. Unlu, M., Yukseler H., and Yetis, U., Indigo Dyeing Wastewater Reclamation by Membrane-Based Filtration and Coagulation Processes, Desalination, 240 (1-3), 178-185,15 May 2009. 
  34. Uzal, N., Yilmaz, L. and Yetis, U.,  Microfiltration/Ultrafiltration as Pretreatment for Reclamation of Rinsing Waters of Indigo Dyeing Wastewater, Desalination,  240 (1-3), 198-208, 15 May 2009.
  35. Ates, N., Yilmaz, L., Kitis M.,and Yetis U., Removal of Disinfection By-Product Precursors by UF and NF Membranes in Low-SUVA Waters, J. of  Membrane Science, 328(1-2), 104-112, 20 February 2009.
  36. Ozturk, E., Yetis,U., Dilek, F.B., and Demirer, G.N., A chemical substitution study for a wet processing textile mill in Turkey, Journal of Cleaner Production, 328(1-2), 104-112, 20 February 2009.
  37. Sahinkaya, E., Uzal, N., Yetis, U., and Dilek, F.B., Biological treatment and nanofiltration of denim textile wastewater for reuse, Journal of Hazardous Materials 153(3): 1142-1148, 30 May 2008.
  38. Capar, G., Yilmaz, L. and Yetis, U., A membrane based co-treatment strategy for the recovery of print- and beck-dyeing textile effluents, J. of Hazardous Materials, 152(1): 316-323, 2008.
  39. Ates N., Yetis U. and Kitis M., Effects of bromide ion and natural organic matter fractions on the formation and speciation of chlorination by-products, Journal of Envıronmental Engıneering-ASCE 133 (10): 947-954, 2007.
  40. Yukseler, H., Tosun,I.AndYetis, U.,A new approach in assessing slurry filterability, J. of Membrane Science 303: 72-79, 2007.
  41. Ates,N., Kitis, M. andYetis, U., Formation of chlorination by-products in waters with low-SUVA- correlations with SUVA and differential UV spectroscopy, Water Research  41: 4139-4148, 2007.
  42. Capar, G., Yetis, U. and Yilmaz, L., What is the most effective pre-treatment to nanofiltration for the recovery of print dyeing wastewaters?, Desalination212:103-113, June 2007.
  43. Ates, N., Kaplan, S.S., Sahinkaya, E., Kitis, M., Dilek F.B. and Yetis, U., Occurrence of disinfection by-products in low DOC surface waters in Turkey, J. of Hazardous Materials 142 (1-2): 526-534, April 2007.
  44. Uzal, N., Yilmaz, L. and Yetis, U., Microfiltration: a pretreatment alternative for indigo dyeing textile wastewater, Desalination 199, (1-3): 517-519, November 2006.
  45. Ates N., Kitis M. and Yetis U., Formation of chlorination by-products. in waters with low SUVA-correlations with SUVA and differential UV spectroscopy, Water Research 41 (18), 4139-4148, 2007.
  46. Tokcaer, E. and Yetis U., Pb(II) Biosorption Using Anaerobically Digested Sludge in a Counter-Current Sorption Process, J. of Hazardous Materials137, No.3, Oct. 2006, 1674-1680.
  47. Yuncu B., Sanin F.D. and Yetis, U., An investigation of heavy metal biosorption in relation to C/N ratio of activated sludge, J. of Hazardous Materials137(2): 990-997, Sep. 2006.
  48. Capar, G., Yilmaz, L. andYetis, U., Reclamation of Acid Dye Bath Wastewater: Effect of pH on Nanofiltration Performance, J. of Membrane Science 281(1-2): 560-569, September 2006.
  49. Capar, G.,  Yetis, U., Olceroglu, A. H. and Yilmaz L., Effect of Color and Surfactants on Nanofiltration for the Recovery of Carpet Printing Wastewaters, Separation Science and Technology, Vol. 41, No. 12, September 2006, 2771-2784.
  50. Capar, G., Yetis, U. and Yilmaz, L., Membrane Based Strategies for the Pretreatment of Acid Dye Bath Wastewater, J. of Hazardous Materials, Vol. 135, No. 1-3, July 2006, 423-430.
  51. Capar, G., Yetis, U. and Yilmaz, L.,Reclamation of Printing Effluents of a Carpet Manufacturing Industry by Membrane Processes, J. of Membrane Science277(1-2): 120-128, June 2006.
  52. Tekin, H., Bilkay, O., Ataberk, S.S., Balta, T.H., Ceribasi, I.H., Sanin, F.D., Dilek F.B. and Yetis, U., Use of Fenton Oxidation to Improve the Biodegradability of a Pharmaceutical Wastewater, J. of Hazardous Materials, 277(1-2): 120-128, June 2006.
  53. Ozeler, D., Yetis, U. and Demirer, G., Life Cycle Assesment of Municipal Solid Waste Management Methods: Ankara Case Study, Environment International32(3): 405-411, April 2006.
  54. Yukseler, H., Yetis, U. and Tosun, I.,Current Status of Filtration Theory, Journal of Residuals Science & Technology 2(4), October 2005.
  55. Tokmak, B., Capar, G., Dilek, F.B. and Yetis, U.,Trihalomethanes and Associated Potential Cancer Risks in the Water Supply in Ankara, Turkey, Environmental Research, Vol. 96, Nov. 2004, 345-352.
  56. Qushsho’o, M., Ozgen, C. and Yetis, U., A Case Study For Control Structure Selection: Chlorination Stage in the Bleaching Process of a Pulp and Paper Plant, Chemical Engineering Communications, Vol. 191. No.1, Jan 2004, 87-104.
  57. Arıcan, B. and Yetis, U., Nickel Sorption by Acclimatized Activated Sludge Culture, Water Research, Vol.37, No.14, Aug. 2003, 3508-3516.
  58. Dilek, F.B., Yetis, U., and Gokcay, C.F., Water savings and sludge minimization in a beet-sugar factory through re-design of the wastewater treatment facility, Journal of Cleaner Production, Vol. 11, No. 3, May 2003, 327-331.
  59. Ozkan, M., Dilek, F.B., Yetis and U., Ozcengiz, G., Nutritional and cultural parameters influencing antidipteran delta-endotoxin production, Research in Microbiology, Volume 154 (1): 49-53, Jan.-Feb. 2003.
  60. Tarlan, E., Yetis, U. and Dilek, F.B., Algal treatment of pulp and paper industry wastewaters in SBR systems, Water Science and Technology45(12):151-158, Dec. 2002.
  61. Capar, G. and Yetis, U., Removal of THM Precursors By GAC: Ankara Case Study, Water Research36(5): 1379-1384, 2002.
  62. Tarlan, E. and Yetis, U., Improvement of Primary Settling Performance with Activated Sludge, Environmental Technology23(4):363-372, 2002.
  63. Tarlan, E., Dilek, F.B, and Yetis, U.,Effectiveness of Algae in the Treatment of a Wood-based Pulp and Paper Industry Wastewater, Bioresource Technology84(1): 1-5, Aug. 2002.
  64. Mutlu, S.H., Yetis, U., Gurkan, T., and Yılmaz, L., Decolorization of Wastewater of a Baker’s Yeast Plant by Membrane Processes, Water Research36(3): 609-616, 2002.
  65. Arican, B., Gokcay, C.F.,Yetis, U., Mechanistics of Nickel Sorption by Activated Sludge, Process Biochemistry37(11): 1307-1315, 2002.
  66. Dilek, F.B., Erbay, A. and Yetis, U., Nickel Biosorption by Polyporous versicolorProcess Biochemistry37(7): 723-726, 2002.
  67. Capar, G., Demirer, G.N., Dilek, F.B., and Yetis, U., Removal of Trihalomethane Precursors by Granular Activated Carbon, Fresenius Environmental Bulletin10(2): 197-202, 2001.
  68. Haytoglu, B., Demirer, G. and Yetis, U., Effectiveness of Waste Anaerobically Digested Dead Biomass In Adsorbing Heavy Metals, Water Science and Technology44(10): 245-252, 2001.
  69. Ceribası, H. and Yetis, U., Biosorption of Ni(II) and Pb(II) by Phanerocheate chrysoporium from a Binary Metal System – Kinetics, Water SA27(1): 15 – 20, 2001.
  70. Yetis, U., Dolek, A., Dilek, F.B. and Ozcengiz, G., The Removal of Pb(II) by Phanerocheate chrysoporium, Water Research34(16): 4090-4100, 2000.
  71. Yetis U., Demirer, G. and Gokcay C.F., Effect Of Chromium (VI) on the Biomass Yield of  the Activated Sludge, Enzyme and Microbial Technology, 25: 48-54, 1999.
  72. Dilek F.B., Gokcay, C.F., and Yetis, U., Combined Effects of Ni(II) and Cr(VI) on Activated Sludge, Water Research32(2): 303-312, 1998.
  73. Yetis, U., Ozcengiz, G., Dilek, F.B., Parlakgoz N., Erbay, A. and Dolek, A., Heavy Metal Biosorption by Polyporous versicolor and Phanerocheate chrysoporium, Water Science and Technology38(4), 1998.
  74. Yetis U., Demirer, G. and Tekin, H., Effect of Shock Chromium (VI) Load on the Activated Sludge Process, Turk. J. of Engin. Environ Sci. 22: 445-453, 1998.
  75. Lule, M., Yetis, U., and Gokcay, C.F., Effects of Ni(II) on Respirometric Oxygen Uptake, Applied Microbiology and Biotechnology48: 636-641, 1997.
  76. Yetis, U., Ataberk, S., Gokcay, C.F., and Sahin S., Characterization of Effluents from Chlorine Dioxide Substitution Bleaching and Oxygen-reinforced Extraction, Water Science and Technology36(2-3): 353-360, 1997.
  77. Yetis, U., Selcuk, A. and Gokcay, C.F.,Reducing Chlorinated Organics, AOX, in the Bleachery Effluents of a Turkish Pulp and Paper Plant, Water Science and Technology34(10), 97-104, 1996.
  78. Gokcay, C.F. and Yetis, U., Effect of Ni(II) on the Biomass Yield Of the Activated Sludge, Water Science and Technology, Vol.34, No.5-6, 1996, 163-174.
  79. Tosun, I., Yetis, U., Willis, M.S. and Chase, G.G., Specific Cake Resistance: Myth or Reality, Water Science and Technology, Vol.28, No.1, 1993, 91-101.
  80. Balkas, T., Juhasz, F., Yetis, U., and Tuncel, G.,The Izmir Bay Wastewater Management Project - Economical Considerations, Water Science and Technology, Vol.26, No.9-11, 1992, 2613-2616.
  81. Dilek F.B. and Yetis, U., Effects of Heavy Metals on Activated Sludge Process, Water Science and Technology, Vol.26, No.3-4, 1992, 801-813.
  82. Gokcay, C.F., and Yetis, U., Effect of Chromium (VI) on Activated Sludge, Water Research, Vol.25, No.1, 1991, 65-73.
  83. Dilek F.B., Gokcay, C.F., and Yetis, U., Effects of Cu(II) on a Chemostat Containing Activated Sludge, Environmental Technology, Vol.12, 1991, 1007-1016.
  84. Yetis, U., and Gokcay, C.F., Effect of Ni(II) on Activated Sludge, Water Research, Vol.23, No.8, 1989, 1003-1007.
International Books or Book Parts
  1. Cagin, V. And Yetis, U., Water Reuse Strategies: Iron and Steel Industry Case Study, in Security of Industrial Water Supply and Management, Ed.: A. Atimtay and S.K. Sikdar, NATO Science and peace Security Series C: Environmental Security, Springer, The Netherlands, pp. 141-158.2011.
  2. Mungan, M. and Yetis, U., Environmental Risk Assessment Of A Textile Factory In Turkey”, in Energy and Environmental Challenges to Security, Ed.: Stec, S. and Baraj, B., Proceedings of the NATO Advanced Research Workshop on Energy and Environmental Challenges to Security, Budapest, Hungary, 21–23 November 2007, Energy and Environmental Challenges to Security Series C: Environmental Security, Springer, The Netherlands, pp. 415-4127, January 2009.
  3. Yetis, U., 2008, Water Quality, Pollution and Conservation in Overexploitation and Contamination of Shared Groundwater Resources, Ed.: C.J.G. Darnault, NATO Science for Peace and Security Series, Springer, The Netherlands.
  4. Girgin, S., Unlu, K., and Yetis, U., 2004, Use of GIS as a Supporting Tool for Environmental Risk Assessment and Emergency Response Plans in Comparative Risk Assessment and Environmental Decision Making, Ed.: I. Linkov and B. Ramadan, NATO-ARW Series, Kluwer Publishers, pp. 267-274.
  5. Yetis, U., Selcuk, A. and Gokcay, C.F., An Approach for Reducing AOX in the Bleachery Effluents of a Turkish Pulp and Paper Plant, in Cleaner Technologies and Cleaner Products for Sustainable Development, Ed.: H.M. Freeman, Z. Puskas, R. Olbina, NATO ASI Series, Springer-Verlag, 1995, Germany.
  6. Balkas, T., Yetis, U., and Chung, C., Integration of Environmental Considerations into Coastal Zone Management: Izmir Bay, Turkey, Coastal Zone Management-Selected Case Studies, OECD Documents, pp.87-108, 1992.
  7. Balkas, I.T., Juhasz,F, Tuncel, G., Yetis, U., and  Talu, N., Preliminary Study on the Coasts and benefits of Measures for the Reduction of Degradation of the Environment from Land-Based Sources of Pollution and activities in Coastal Areas of the Bay of Izmir, UNEP(OCA)/WG.14/Inf.8, December 1991, UNEP, Athens.

water-and-waste-flyer Journal Flyer