Effects of different concentration of Zn(II) on the organic material degradation and nitrification process in the treatment of real industrial wastewater

Authors : Bengisu ÇİFTÇİOĞLU GÖZÜAÇIK, Dilşad SOYLU, Çiğdem BALÇIK, Bahar ÖZBEY ÜNAL, Bülent KESKİNLER

Pages : 412-417

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Publication Date : 2023-08-31

Article Type : Research Paper

Abstract :In this study, three real industrial wastewaters containing different concentration of Zn insert ignore into journalissuearticles values(II); were treated with lab-scale sequential batch bioreactor insert ignore into journalissuearticles values(SBR); to determine the effects of Zn insert ignore into journalissuearticles values(II); on the organic material degradation and nitrification process. The effects of Zn insert ignore into journalissuearticles values(II); on nitrification performance were determined by monitoring the bioactivities of ammonium oxidizing bacteria insert ignore into journalissuearticles values(AOB); and nitrite oxidizing bacteria insert ignore into journalissuearticles values(NOB);, and effluent Zn insert ignore into journalissuearticles values(II); concentrations. It was observed that the organic matter removals of SBRs fed with wastewater containing different zinc concentrations show high similarity. Ammonium removal efficiencies insert ignore into journalissuearticles values(ARE); of reactors operated with a concentration of 2.1, 1.2, and 0.6 mg Zn insert ignore into journalissuearticles values(II);/L were observed as 88.9±1,7%, 89.8±1.0 % and 81.4±7.3 %, respectively. However, a remarkable effect on nitrate conversion rate insert ignore into journalissuearticles values(NaCR); was determined. NaCR was 98.3±8.2%, 47.5±11.4%, 27.6±6.7% for a concentration of 2.1, 1.2, and 0.6 mg Zn insert ignore into journalissuearticles values(II);/L, respectively. Additionally, it was concluded that NOB bioactivity and nitrate conversion rates were improved with increasing Zn insert ignore into journalissuearticles values(II); concentration. The effluent Zn insert ignore into journalissuearticles values(II); concentrations were measured as 0.67 mg/L, 0.33 mg/L and 0.07 mg/L for a influent concentration of 2.1, 1.2, and 0.6 mg Zn insert ignore into journalissuearticles values(II);/L, respectively. Results of the influent and effluent zinc concentrations showed that zinc was adsorbed on bioflocs
Keywords : Çinko, Aktif çamur, Nitrifikasyon, Toksisite