Research Article

Evaluation of Thiosulfate-Based Autotrophic and Mixotrophic Denitrification Performances under Different Operational Conditions

Volume: 20 Number: 4 December 27, 2017
Kahramanmaras Sutcu Imam University Journal of Engineering Sciences Cover
Kahramanmaras Sutcu Imam University Journal of Engineering Sciences
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Evaluation of Thiosulfate-Based Autotrophic and Mixotrophic Denitrification Performances under Different Operational Conditions

Abstract

The aim of this study was to investigate the factors affecting the autotrophic and mixotrophic denitrification performances in sequencing batch reactor (SBR). Findings obtained from this study shed light on the full-scale applicability of the autotrophic and mixotrophic denitrification processes in carbon deficient wastewaters. In this study, the effect of cycle time, varying concentrations of electron donor source and the addition of external organic carbon source was evaluated by sulfate, nitrate, nitrite, ORP and inorganic carbon parameters. Firstly, SBR was operated with thiosulfate (S2O32-) based autotrophic denitrification process at different cycle times (8h-4h-2h). Further, autotrophic denitrification process was optimized the under varying S2O32-/NO3- ratios (1.5-1.25-1.0) at the optimum cycle time of 2h. The maximum nitrate removal efficiency of 84% was accomplished at operational conditions containing 2h cycle time and 1.5 S2O32-/NO3- ratio. In the rest of the study,the impact of increasing C/N ratio by methanol supplementation (0.35-0.7-1.05)was evaluated on mixotrophic denitrification performance. It was observed that nitrate was completely consumed at the C/N ratio of 1.05 and nitrate removal rate improved with increasing methanol supplementation as organic carbon source.

Keywords

References

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Details

Primary Language

Turkish

Subjects

Environmental Engineering

Journal Section

Research Article

Authors

Vildan Akgul
Department of Bioengineering and Sciences, KahramanmarasSutcu Imam University, Kahramanmaras 46100, Turkey
Türkiye

Dilek Akman
Department of Environmental Engineering, KahramanmarasSutcu Imam University, Kahramanmaras 46100, Turkey
Türkiye

Yakup Cuci
Department of Environmental Engineering, KahramanmarasSutcu Imam University, Kahramanmaras 46100, Turkey
Türkiye

Kevser Cirik
Department of Environmental Engineering, KahramanmarasSutcu Imam University, Kahramanmaras 46100, Turkey
Türkiye

Publication Date

December 27, 2017

Submission Date

August 24, 2017

Acceptance Date

November 22, 2017

Published in Issue

Year 2017 Volume: 20 Number: 4

DOI

https://doi.org/10.17780/ksujes.335996

IZ

https://izlik.org/JA23HK42YN

Cite

RIS / Bibtex
APA
Akgul, V., Akman, D., Cuci, Y., & Cirik, K. (2017). Farklı İşletim Koşulları Altında Tiyosülfat Bazlı Ototrofik ve Miksotrofik Denitrifikasyon Performansının Araştırılması. Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi, 20(4), 81-89. https://doi.org/10.17780/ksujes.335996