Back to Search
Start Over
Adapting to seasonal temperature variations: A dynamic multi-subunit strategy for sulfur autotrophic denitrification bioreactors.
- Source :
-
Environmental research [Environ Res] 2024 Jan 01; Vol. 240 (Pt 2), pp. 117493. Date of Electronic Publication: 2023 Oct 27. - Publication Year :
- 2024
-
Abstract
- Elemental sulfur autotrophic denitrification (S <superscript>0</superscript> AD) processes are temperature-sensitive, presenting a substantial challenge for the practical implementation of S <superscript>0</superscript> AD bioreactors. In this study, a comprehensive methodology for designing and operating S <superscript>0</superscript> AD bioreactors was developed, effectively managing fluctuations in nitrogen removal efficiency caused by seasonal temperature variations. Initially, the nitrate removal rate was correlated with simulated on-site temperature and nitrate loading, revealing correlation coefficients of k <subscript>1</subscript> , k <subscript>2</subscript> , k <subscript>3</subscript> , and A as 5.42×10 <superscript>-4</superscript> , -0.41, 0.04, and 0.13, respectively, to establish a mathematical model for predicting S <superscript>0</superscript> AD efficiency. Subsequently, by considering influence factors such as dissolved oxygen and dynamic sulfur consumption, the model was employed to accurately design a pilot-scale S <superscript>0</superscript> AD bioreactor for a case study. By utilizing an alternative multi-subunit operation, a stable effluent nitrate concentration of less than 8 mg-N/L was maintained throughout the year. Importantly, this approach resulted in a substantial reduction of 76.8% in excessive nitrate removal, sulfur consumption, and sulfate production. This study aims to provide an optimal design and operation strategy for the practical application of S <superscript>0</superscript> AD bioreactors, thereby enhancing reliability and cost-effectiveness in the face of seasonal temperature changes.<br />Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.<br /> (Copyright © 2023 Elsevier Inc. All rights reserved.)
Details
- Language :
- English
- ISSN :
- 1096-0953
- Volume :
- 240
- Issue :
- Pt 2
- Database :
- MEDLINE
- Journal :
- Environmental research
- Publication Type :
- Academic Journal
- Accession number :
- 37890831
- Full Text :
- https://doi.org/10.1016/j.envres.2023.117493