Improvement of water quality in over-polluted Niğde Creek in Turkey

Abstract

Kızılca creek, which is one of the main sources of irrigation water in Niğde (Turkey), was extensively polluted due to high amount of organic matters in the point and non-point pollutant sources. This study aims to remove organic matters and improve water quality of the creek by using a pilot-scale hybrid natural wastewater treatment (NWT) system. The system consists of a combination of settling basin, free water surface constructed wetland, and overland flow (OF) system. The system was installed near the edge of the creek in 2014.

Wastewater samples from the inlet and outlet of all stages of the system were collected and analyzed for temperature, pH, electrical conductivity (EC), dissolved oxygen (DO), and the suspended solid (SS) parameters.  The obtained results indicated that the high organic matter loads caused the deterioration of the water quality in the creek.  The system could remove up to 80%. The results showed water quality of the creek and the treatment performance of the system were affected by temperature, the DO, and seasonal changes. Consequently, the NWT system can be usefully used useful to decrease solid matters in highly polluted streams and thus improve water quality.

Keywords

• Constructed wetland system,land treatment

Kaynakça

1. Crites R.W., Middlebrooks J. & Reed S.C. 2006. Natural Wastewater Treatment Systems, Taylor & Francis Group, CRC Press, USA.
2. Göksu M.Z.L. 2003. Su Kirliliği Ders Kitabı, Çukurova Üniversitesi, Su Ürünleri Fakültesi Yayınları, No:17 Adana, Turkey.
3. Kadlec R.H. & Wallace S.D. 2009. Treatment Wetlands, Second Ed., CRC Press, Boca Raton, FL USA.
4. Kim B., Gautier M., Prost-Boucle S., Molle P., Michel P. & Gourdon R. 2014. Performance evaluation of partially saturated vertical-flow constructed wetland with trickling filter and chemical precipitation for domestic and winery wastewaters treatment. Ecological Engineering 71, 41–47.
5. Li F., Lu L., Zheng X. & Zhang X. 2014. Three-stage horizontal subsurface flow constructed wetlands for organics and nitrogen removal: effect of aeration. Ecological Engineering, 68, 90–96.
6. Morató J., Codony F., Sánchez O., Pérez L.M., García J. & Mas J. 2014. Key design factors affecting microbial community composition and pathogenic organism removal in horizontal subsurface flow constructed wetlands. Science of the Total Environment 481, 81–89.
7. Özpınar Z. 2007. Göksu Deltası‟nda Su Kalitesinin Fotometrik Yöntemlerle Belirlenmesi, Mersin Üniversitesi, Fen Bilimleri Enstitüsü Çevre Mühendisliği ABD. Yüksek Lisans Tezi, Mersin.
8. Reed S.C., Crites R.W. & E.J. Middlebrooks, 1995. Natural Systems for Waste Management and Treatment, Second Edition, McGraw-Hill, New York, NY.

9. Standard Methods for the Examination of Water and Wastewater 1998 20th edn, American Public Health Association/American Water Works Association/Water Environment Federation, Washington DC, USA.
10. Tepe A.Y. & Mutlu E. 2004. Arsuz Deresi (Hatay) Su Kalitesinin Fiziko Kimyasal Yöntemlerle Belirlenmesi, Türkiye‟nin Kıyı ve Deniz Alanları V. Ulusal Konferansı, 04-07 Mayıs, Adana, TURKEY.
11. Tuncsiper B. 2016. Akkaya Baraj Gölünü Kirleten Kızılca Deresinin Doğal Atıksu Arıtma Yöntemiyle Arıtılması (Proje yürütücüsü), TÜBİTAK Projesi, Proje No: 113Y589, 2014-2016.
12. Tunçsiper B. 2017a. Investigation of bacteriological contamination in Kızılca (Karasu) Creek feeding Akkaya reservoir and solution proposals to reduce contamination. Journal of Tekirdağ Agricultural Faculty, 14(01), 28-37.
13. Tuncsiper B. 2017b. Akkaya Baraj Gölünü Kirleten Kızılca Deresinde Kirliliğin Incelenmesi ve Dere ve Çıkış Sularının Arıtılması Için Uygun Bir Bertaraf Yönteminin Belirlenmesi, Nigde Üniversitesi-BAP Projesi (Proje yürütücüsü), Proje No: FEB 2013/35-BAGEP, 2014-2017.
14. TWPCR. 2004. Water Pollution Control Regulations. Ministry of Environment and Urbanization. Official Gazette. 31.12.2004, Issue: 25687, Ankara, Turkey.
15. TWPCR. 2009. Water Pollution Control Regulations: the sampling and analysis methods notice. Official Gazette. 10.10.2009, Issue: 27372, Ankara, Turkey.
16. USEPA. 2002. Implementation guidance for ambient water quality criteria for bacteria, US EPA-823-B-02- 003, USEPA, Washington DC., USA.