Enhanced Denitrification of Integrated Sewage Treatment System by Supplementing Denitrifying Carbon Source
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Methods
2.2.1. Release Experiments
2.2.2. Denitrification Performance of Carbon Source
Selection of Optimal Carbon Source Dosage
Determination of Denitrification Performance
2.2.3. Enhanced Denitrification Effect of ISTY by Supplementing Carbon Sources
2.2.4. Economic Benefit Evaluation of Adding Carbon Source in Denitrification Stage of ISTY
2.3. Characterization and Analytical Methods
2.4. Data Analysis Method
3. Results and Discussion
3.1. Release Experiments
3.1.1. Carbon Source Element Content Analysis
3.1.2. Carbon Release Performance of Carbon Source
3.1.3. Release of Nitrogen and Phosphorus from Carbon Sources
3.1.4. FT IR Characteristics of Carbon Source before and after Carbon Release
3.2. Denitrification Performance of Carbon Source
3.2.1. Screening of Carbon Source Dosage
3.2.2. Denitrification Performance
3.2.3. Characteristics of Surface Structure Change of Carbon Source
3.3. Enhanced Denitrification Effect of ISTY by Supplementing Carbon Sources
3.3.1. Effect of Carbon Source Supplement on Denitrification Enhancement of ISTY
3.3.2. Effects of Carbon Source Supplementation on Denitrifying Microorganisms
3.3.3. Economic Benefit Analysis of Adding Carbon Source in Denitrification Stage of ISTY
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Dispensing Agent | Dosage (g/L) | Trace Element Liquid Composition | Concentration (g/L) | Water Quality Index | Concentration (g/L) |
---|---|---|---|---|---|
KNO3 | 0.06 | FeCl3 | 0.8 | NO3−-N | 19.17 ± 0.96 |
KH2PO4 | 0.02 | KI | 0.18 | NH4+-N | 0.54 ± 0.07 |
MgSO4 | 0.003 | CuSO4·5H2O | 0.03 | TN | 20.14 ± 0.74 |
NaCl | 0.03 | ZnCl2 | 0.06 | TP | 4.73 ± 0.13 |
trace element | 2 mg/L | CoCl2·7H2O | 0.15 | COD | 11.20 ± 1.21 |
Water Quality Index | TN | NO3−-N | NH4+-N | TP | COD |
---|---|---|---|---|---|
Concentration (g/L) | 19.6 ± 0.67 | 5.9 ± 0.42 | 9.4 ± 0.36 | 4.6 ± 0.14 | 69.6 ± 5.13 |
Material | w% | |||
---|---|---|---|---|
C | N | P | S | |
PS | 44.18 ± 1.22 | 1.20 ± 0.07 | 0.18 ± 0.02 | 0.30 ± 0.05 |
SD | 48.92 ± 0.86 | 0.22 ± 0.03 | 0.17 ± 0.04 | 0.16 ± 0.04 |
PT | 50.04 ± 1.52 | 2.27 ± 0.08 | 0.34 ± 0.06 | 0.39 ± 0.08 |
Material | First-Order | Ritger-Peppas | ||||
---|---|---|---|---|---|---|
Fitting Equation | R2 | k | Fitting Equation | R2 | N | |
PS | ] | 0.99 | 0.16 | 0.94 | 0.16 | |
SD | ] | 0.97 | 0.25 | 0.96 | 0.13 | |
PT | 0.91 | 0.16 | 0.98 | 0.19 | ||
MT | 0.90 | 0.17 | 0.95 | 0.19 |
Material | NO3−-N | TN | ||
---|---|---|---|---|
PS | R2 = 0.99 | ] | R2 = 0.97 |
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Chen, D.; Chen, P.; Zheng, X.; Cheng, W.; Wang, Q.; Wei, X. Enhanced Denitrification of Integrated Sewage Treatment System by Supplementing Denitrifying Carbon Source. Int. J. Environ. Res. Public Health 2021, 18, 9569. https://doi.org/10.3390/ijerph18189569
Chen D, Chen P, Zheng X, Cheng W, Wang Q, Wei X. Enhanced Denitrification of Integrated Sewage Treatment System by Supplementing Denitrifying Carbon Source. International Journal of Environmental Research and Public Health. 2021; 18(18):9569. https://doi.org/10.3390/ijerph18189569
Chicago/Turabian StyleChen, Dongkai, Peizhen Chen, Xiangqun Zheng, Weimin Cheng, Qiang Wang, and Xiaocheng Wei. 2021. "Enhanced Denitrification of Integrated Sewage Treatment System by Supplementing Denitrifying Carbon Source" International Journal of Environmental Research and Public Health 18, no. 18: 9569. https://doi.org/10.3390/ijerph18189569