Investigation of Total Organic Carbon TOC Removal in Domestic Wastewater by Photo Fenton Process

OpenAlex İngilizce

Ozet Endustrilesme ve nufus artisina bagli olarak su tuketimi, dolayisiyla atiksu miktari her gecen gun artmakta ve atiksularin bertaraflari icin cesitli aritim metotlari uygulanmaktadir. Ileri oksidasyon prosesleri (IOP) atiksuda bulunan organik maddelerin etkili giderimi icin tasarlanmis bir seri kimyasal aritim islemlerini icerir. Ileri oksidasyon prosesleri, atiksulardaki ozellikle toksik ve ayrisabilirligi zor kirleticilerin aritimi icin klasik atiksu aritim yontemlerine gore oldukca avantajli proseslerdir. Bu calismada, evsel atiksulardan toplam organik karbon (TOK) gideriminde Foto-Fenton oksidasyon yonteminin uygulanabilirligi arastirilmistir. Bu amacla, Fe+2 ile hidrojen peroksit (H2O2) konsantrasyonlarinin, reaktor ve lamba tipinin, sicaklik ve pH gibi proses degiskenlerinin etkileri arastirilmistir. Atiksu aritimi icin optimum deney sartlari, 200 mg/L Fe+2 miktari, 15 mM H 2 O 2 ilavesi ve 35°C olarak belirlenmistir. Gunes enerjisinin de isik kaynagi olarak kullanilabilmesi icin Ultraviyole A (UVA) lamba tipinin uygun oldugu bulunmustur. TOK giderim verimleri, cesitli deneysel sartlar altinda %70-90 arasinda elde edilmistir. Bu calisma ile Fe+2- H2O2/UV prosesinin evsel atiksu aritiminda kullanilabilecegi ortaya konmustur. Anahtar Kelimeler: Evsel Atiksu, foto-Fenton prosesi, ileri oksidasyon prosesleri, ultraviyole (UV). Abstract Water consumption is increasing due to industrialization and population growth causing increased amounts of wastewater for discharge with the application of various treatment methods to treat wastewater. Advanced oxidation processes (AOPs) are also emerging as a promising technology both as an alternative treatment to conventional wastewater treatment methods and enhancement of current biological treatment methods, for especially highly toxic and non-biodegradable wastes. In this study, the applicability of Photo- Fenton oxidation method was investigated for the removal of total organic carbon (TOC) content in domestic wastewaters. The effects of various process variables on removal performance of the process were evaluated by examining Fe +2 and H2O2 dosages, temperature, pH, the types of reactors and UV lamps. Optimal experimental conditions for the wastewater treatment were found as 200 mg/L Fe+2, 15 mM H 2 O 2 and 35°C. Ultraviolet A (UVA) light type of lamp was used as a light source in order to use solar energy. TOC removal efficiencies of 70-90% were obtained under various experimental conditions. As a result of this study, it can be concluded that Fe+2-H2O2/UV process can be safely used for the treatment of