AI Article Synopsis
- A new bioreactor system (CCF-SBR) using corncobs was created to treat wastewater at low temperatures and a low carbon/nitrogen ratio.
- Results indicated that the CCF-SBR performed similarly to a control SBR in terms of COD concentration, but it significantly outperformed the control in total nitrogen removal rates.
- The study found that CCF-SBR mainly contributes to denitrification, while the control SBR focuses on nitrification, highlighting its potential for agricultural waste utilization and effective wastewater treatment in challenging conditions.
Article Abstract
In this study, a combined corncob-based fixed bed bioreactor and sequencing batch reactor system (CCF-SBR) was developed to treat low-temperature (3-12 °C) and low carbon/nitrogen ratio (C/N = 2) wastewater with a single SBR as the control. Results showed similarly low COD concentration of CCF-SBR (20.4 ± 3.7 mg·L) and control SBR (24.9 ± 6.7 mg·L) effluent. However, the total nitrogen (TN) removal rate of CCF-SBR was significantly higher than that of control SBR (29.6 ± 2.7% vs 8.6 ± 2.3%). According to the nitrification and denitrification activities and the analysis of microbial community, CCF mainly played the role of denitrification based on fermentation genera and denitrifying genera, and SBR mainly implemented nitrification with Nitrospira and Acinetobacter. This study explores a promising way for agricultural waste resource utilization and wastewater treatment under low-temperature and low C/N ratio.
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| http://dx.doi.org/10.1016/j.biortech.2022.126975 | DOI Listing |
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