Biography
Orhan Gökyay has received his Bachelor’s degree in Environmental Engineering from Marmara University in 1999. He earned his MS degree in Environmental Engineering from Marmara University in 2001 and PhD in Environmental Technology from Boğaziçi University in 2009. He is currently a faculty member of Environmental Engineering at Marmara University, İstanbul, Turkey. His current research interests include management of sludges generated from wastewater treatment plants, water supply and distribution networks, wastewater collection and soil recovery.
Education Information
2001 - 2009
2001 - 2009Doctorate
Bogazici University, Instıtute Of Envıronmental Scıences, Department Of Envıronmental Technology, Turkey
1999 - 2001
1999 - 2001Postgraduate
Marmara University, Institute For Graduate Studies İn Pure And Applied Sciences, Çevre Mühendisliği (Yl) (Tezli), Turkey
1994 - 1999
1994 - 1999Undergraduate
Marmara University, Faculty Of Engineering, Environmental Engineering, Turkey
Dissertations
2009
2009Doctorate
A simple method for small scale wastewater treatment plants for the thickening of sludges: Mesh filter and foam filter 
Boğaziçi Üniversitesi, Çevre Bilimleri Enstitüsü, Çevre Teknolojisi Anabilim Dalı
2001
2001Postgraduate
An Application of soil washing method for the remediation of contaminated soils by mining activities
Marmara Üniversitesi, Fen Bilimleri Enstitüsü, Çevre Mühendisliği (Yl) (Tezli)
Foreign Languages
C1 Advanced
C1 AdvancedEnglish
Research Areas
Waste Water Collection and Treatment
Water Pollution and Control
Water Supply and Treatment
Soil and Groundwater Pollution and Control
Academic Titles / Tasks
2010 - Continues
2010 - ContinuesAssistant Professor
Marmara University, Faculty Of Engineering, Environmental Engineering
1999 - 2010
1999 - 2010Research Assistant
Marmara University, Faculty Of Engineering, Environmental Engineering
Managerial Experience
2012 - Continues
2012 - ContinuesDeputy Head of Department
Marmara University, Faculty of Engineering, Environmental Engineering
Advising Theses
2022
2022Postgraduate
PETROL SIZINTISIYLA KONTAMİNE OLMUŞ BİR AKARYAKIT İSTASYONUNUN ÇEVRE VE HALK SAĞLIĞI AÇISINDAN TKKNKKSDY KAPSAMINDA İNCELENMESİ VE REHABİLİTASYONU İÇİN UYGUN METODOLOJİ ARAŞTIRILMASI
Gökyay O. (Consultant)
G.KARA(Student)
2020
2020Postgraduate
Evsel katı atık toplama ve taşıma iş kolunda çalışanların iş sağlığı ve güvenliği koşullarının değerlendirilmesi, Ankara-Yenimahalle örneği
Gökyay O. (Consultant)
L.MERVE(Student)
2016
2016Postgraduate
Reject water load on wastewater treatment plants
GÖKYAY O. (Consultant)
K.S.K.(Student)
2016
2016Postgraduate
Atık su arıtma tesislerin‘de süzüntü suyu kaynaklı yükler
GÖKYAY O. (Consultant)
K.Alshami(Student)
2015
2015Postgraduate
Essakane Altın Madeni'nin çevresel etkileri
GÖKYAY O. (Consultant)
M.PORGO(Student)
2013
2013Postgraduate
Nutrient and heavy metal removal from domestic wastewater by using duckweed (Lemna minor L.)
GÖKYAY O. (Consultant)
M.BALCIGİL(Student)
2013
2013Postgraduate
Su mercimeği (lemna minor L.) kullanarak evsel atıksulardan nutrient ve ağır metal giderimi
GÖKYAY O. (Consultant)
M.Balcıgil(Student)
2013
2013Postgraduate
The role of ozonation in sludge thickening by foam filtration and its cost analysis
GÖKYAY O. (Consultant)
S.ÇIRAK(Student)
Published journal articles indexed by SCI, SSCI, and AHCI
2023
2023Investigation of non-fatal occupational accidents and their causes in Turkish shipyards
Izci F. B., Gökyay O., Barlas B.
INTERNATIONAL JOURNAL OF OCCUPATIONAL SAFETY AND ERGONOMICS, vol.29, pp.1-8, 2023 (SSCI)
2017
2017Environmental impacts of gold mining in Essakane site of Burkina Faso
Porgo M., Gökyay O.
HUMAN AND ECOLOGICAL RISK ASSESSMENT, vol.23, pp.641-654, 2017 (SCI-Expanded)
2006
2006Leachability of metals from soil contaminated by mining activities
Yukselen M., Gokyay O.
ENVIRONMENTAL ENGINEERING SCIENCE, vol.23, no.1, pp.125-132, 2006 (SCI-Expanded)
2003
2003Inactivation of coliform bacteria in Black Sea waters due to solar radiation
Yukselen M., Calli B., Gokyay O., Saatci A.
ENVIRONMENT INTERNATIONAL, vol.29, no.1, pp.45-50, 2003 (SCI-Expanded)
Articles Published in Other Journals
2022
2022Phases and Applications of the Regulation on Control of Soil Pollution and Point Source Contaminated Sites Specific to Fuel Stations
Gökyay O., Kara G.
Marmara Üniversitesi Fen Bilimleri Enstitüsü Dergisi, vol.34, no.3, pp.445-460, 2022 (Peer-Reviewed Journal)
2020
2020İş Yerlerinde Ergonomik Koşulların İş Sağlığı ve Güvenliği Açısından Aydınlatma Özelinde Değerlendirilmesi
Gökyay O., Okşak İ.
International journal of advances in engineering and pure sciences (Online), vol.32, no.4, pp.488-493, 2020 (Peer-Reviewed Journal)
2020
2020Evsel Katı Atık Toplama ve Taşıma İşkolunda Çalışanların İş Sağlığı ve Güvenliği Koşullarının Değerlendirilmesi, Ankara-Yenimahalle Örneği
Gökyay O., Özer L. M.
International journal of advances in engineering and pure sciences (Online), vol.32, no.4, pp.413-419, 2020 (Peer-Reviewed Journal)
2020
2020An easy MS Excel software to use for water distribution system design: A real case distribution network design solution
GÖKYAY O.
JOURNAL OF APPLIED WATER ENGINEERING AND RESEARCH, vol.8, no.4, pp.290-297, 2020 (ESCI)
2017
2017Ham ve Sentetik Atıksularda Su Mercimeği (Lemna minor L.) Kullanılarak Karbon ve Besi Maddelerinin Gideriminin İncelenmesi ve Karşılaştırılması
Gökyay O., Balcıgil M.
Marmara Fen Bilimleri Dergisi, vol.29, no.4, pp.124-132, 2017 (Peer-Reviewed Journal)
2014
2014THE ROLE OF OZONATION IN SLUDGE THICKENING BY FOAM FILTRATION AND ITS COST ANALYSI
Gökyay O., Çırak S.
International Journal of Advances in Engineering and Pure Sciences, vol.26, no.1, pp.12-19, 2014 (Peer-Reviewed Journal)
2010
2010Thickening of Sludges with Foam Filter
Gökyay O., Erdinçler A.
Su Kirlenmesi Kontrolü - İTÜ Dergisi, vol.20, no.1, pp.85-93, 2010 (Peer-Reviewed Journal)
Refereed Congress / Symposium Publications in Proceedings
2017
2017EFFECTS OF REJECT WATER ON A LARGE SCALEWASTEWATER TREATMENT PLANT IN ISTANBUL
GÖKYAY O., ALSHAMI K.
ICOCEE – CAPPADOCIA 2017, 8 - 10 May 2017
2012
2012Türkiye’de beyaz eşya üretiminden kaynaklanan tehlikeli atıklar
Yazıcı B., CAN Z. S., ÇALLI B., MERTOĞLU B., GÖKYAY O., AKGÜL D., et al.
İTÜ 13.Endüstriyel Kirlenme Kontrolü Sempozyumu, Turkey, 17 - 19 October 2012
2012
2012Türkiye’de otomotiv sektöründen kaynaklanan tehlikeli atıkların azaltılması çalışmaları
CAN Z. S., GÖKYAY O., ÇALLI B., MERTOĞLU B., AKGÜL D., Yazıcı B., et al.
İTÜ 13. Endüstriyel Kirlenme Kontrolü Sempozyumu, Turkey, 17 - 19 October 2012
2011
2011Investigation of Hazardous Waste Generation by Turkish Automotive Industry
YAZICI B., CAN Z. S., GÖKYAY O., ÇALLI B., MERTOĞLU B., AKGÜL D., et al.
EurAsia Waste Management Symposium, 14 - 16 November 2011
2011
2011Hazardous Waste Generation From Household Appliances Industry in Turkey
YAZICI B., ÇALLI B., MERTOĞLU B., CAN Z. S., GÖKYAY O., AKGÜL D., et al.
EurAsia Waste Management Symposium, 14 - 16 November 2011
2009
2009SLUDGE THICKENING WITH FOAM FILTER
Gökyay O., Erdinçler A.
II. Ulusal Arıtma Çamurları Sempozyumu,, İzmir, Turkey, 4 - 06 November 2009, pp.61-70
2001
2001“Effect of solar radiation on the inactivation of coliform bacteria in black sea waters
Gökyay O., Yükselen M. A., Çallı B., Saatçı A. M.
Third Black Sea International Conference, Environmental Protection Technologies for Coastal Protection, Varna, Bulgaria, 6 - 08 June 2001, pp.14-22
2001
2001Dewatering and settling Characteristics of sludge from an organized industrial zone
Gökyay O., Yükselen M. A.
IWA Sludge Managemet Entering the third MilleniumIndustrial, combined Water and Wastewater Residues, Taipei, Taiwan, 25 - 28 March 2001, pp.490-495
2000
2000The Effect of Land Based Sea Pollution in An Old Mining Region”: A Case Study from Northern Cyprus
Gökyay O., Yükselen M. A., Çallı B., Kocamemi B.
Paris 2000: 1st World Congress of the International Water Association (IWA), Paris, France, 3 - 07 July 2000
Expert Reports
2019
20192017/254 Çevreyi Kasten Kirletme
Gökyay O.
T.C. İSTANBUL ANADOLU 38. ASLİYE CEZA MAHKEMESİ, pp.12, İstanbul, 2019
2018
20182017/351 Çevreyi Kasten Kirletme
Gökyay O.
T.C. İSTANBUL ANADOLU 69. ASLİYE CEZA MAHKEMESİ, pp.9, İstanbul, 2018
Supported Projects
2013 - 2015
2013 - 2015Su mercimeği (Lemna Minor) kullanarak evsel atıksulardan nutrient ve ağır metal giderimi
Project Supported by Higher Education Institutions
Gökyay O. (Executive), Balcıgil M.
2009 - 2013
2009 - 2013
Türkiye de AB Çevre Mevzuatı ile uyumlu Tehlikeli Atık Yönetimi
TUBITAK Project
Gökyay O., Can Z. S., Çallı B., Mertoğlu B., Akgül D.
2010 - 2012
2010 - 2012Sludge Thickening with Foam Filter
Project Supported by Higher Education Institutions
Gökyay O. (Executive)
2010 - 2012
2010 - 2012Kaldness halkası dolgulu anammox sisteminde serbest amonyak inhibisyonunun incelenmesi
Project Supported by Higher Education Institutions
Gökyay O., Bakırcı K. (Executive)
2005 - 2008
2005 - 2008Yüksek Çözünmüş Organik Madde İçeren Sularda Flok Yapılarının İncelenmesi
TUBITAK Project
Can Z. S., Yükselen M. A.(Executive), Gökyay O.
2004 - 2006
2004 - 2006Mesh Filtration as a New Method in Sludge Thickening
Project Supported by Higher Education Institutions
Gökyay O., Erdinçler A.(Executive)
2003 - 2005
2003 - 2005Application of Stabilization/Solidification Techniques in the Preservation of Groundwater Pollution from Industrial Wastes/Sludges
Project Supported by Higher Education Institutions
Gökyay O., Yükselen M. A.(Executive)
2000 - 2002
2000 - 2002