Application of Hydrogen-Based Denitrification: Simultaneous Removal of Nitrate and Reactive Black 5 Dye from Textile Wastewater Containing Organic Matter
Issued Date
2023-07-01
Resource Type
eISSN
20711050
Scopus ID
2-s2.0-85164926974
Journal Title
Sustainability (Switzerland)
Volume
15
Issue
13
Rights Holder(s)
SCOPUS
Bibliographic Citation
Sustainability (Switzerland) Vol.15 No.13 (2023)
Suggested Citation
Singhopon T., Rujakom S., Shinoda K., Kamei T., Kazama F. Application of Hydrogen-Based Denitrification: Simultaneous Removal of Nitrate and Reactive Black 5 Dye from Textile Wastewater Containing Organic Matter. Sustainability (Switzerland) Vol.15 No.13 (2023). doi:10.3390/su151310324 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/88069
Title
Application of Hydrogen-Based Denitrification: Simultaneous Removal of Nitrate and Reactive Black 5 Dye from Textile Wastewater Containing Organic Matter
Author(s)
Author's Affiliation
Other Contributor(s)
Abstract
In this study, a hydrogen-based denitrification (HD) reactor was used to investigate the simultaneous treatment of nitrogen and decolorization in textile wastewater contaminated with organic matter. The reactor operated in two phases: without and with organic matter. Despite the short hydraulic retention time, the HD system successfully removed all pollutants, including nitrate, nitrite, reactive black-5 dye and chemical oxygen demand. The unhindered treatment efficiency for nitrogen and decolorization in the presence of organic pollutants was observed. With the addition of organic matter, the nitrogen removal efficiency increased slightly from 85% to 90–100%, and the decolorization rate doubled from 25% to 50–60%. Organic matter played a crucial role in stimulating heterotrophic bacteria during biological denitrification and acted as a carbon source facilitating biological denitrification and azo bond cleavage during dye degradation. Despite the generation of toxic byproducts and changes in the dominant microbial community, the treatment efficiency remained stable and improved. This approach offers a promising solution for enhancing treatment efficiency in textile wastewater, providing a cost-effective and environmentally friendly option for developing countries to treat wastewater before discharge.