| Autor: |
Tuyen-Nguyen, Van, Trung-Do, Quang, Quang-Chu, Xuan, Hyungu, Kim, Daehee, Ahn, Tuong Manh, Nguyen, Myoung-Jin, Um, D Duc, Nguyen, Duong Duc, La, Thuan-Tran, Hung |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Science of The Total Environment. 862:160802 |
| ISSN: |
0048-9697 |
| DOI: |
10.1016/j.scitotenv.2022.160802 |
| Popis: |
In this study, the operation parameters of a partial nitrification process (PN) treating saline wastewater were optimized using the Box-Behnken design via the response surface methodology (BBD-RSM). A novel strategy based on the control of the carbon/nitrogen ratio (C/N), alkalinity/ammonia ratio (K/A), and salinity in three stages was used to achieve PN in a sequence batch reactor. The results demonstrated that a high and stable PN was completed after 50 d with an ammonia removal efficiency (ARE) of 98.37 % and nitrite accumulation rate (NAR) of 85.93 %. Next, BBD-RSM was applied, where ARE and NAR were the responses. The highest responses from the confirmation experiment were 99.9 % ± 0.04 and 95.25 % ± 0.32 when the optimum C/N, K/A, and salinity were identified as 0.84, 2, and 5.5 (g/L), respectively. The results were higher than those for the nonoptimized reactor. The developed regression model adequately forecasts the PN performance under optimal conditions. Therefore, this study provides a promising strategy for controlling the PN process and shows how the BBD-RSM model can improve the PN performance. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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Full Text from ScienceDirect