The Changing and Distribution Laws of Oxygen Transfer Efficiency in the Full-Scale IFAS Process
Abstract
:1. Introduction
2. Materials and Methods
2.1. Process Operation
2.2. Operation Parameters
2.3. Determination of αSOTE
3. Results and Discussion
3.1. Effects of Aeration Type on αOTE of the IFAS Process
3.2. Effects of Aeration Type on the αSOTE of IFAS
3.3. Effects of the CFR on the αOTE of IFAS
3.4. Effects of the Carrier Filling Ratio on the αSOTE of IFAS
4. Conclusions
- The αOTE and DO concentrations of the IFAS process were affected by the aeration type.
- The αSOTE of the middle of the coarse-bubble aeration systems was close to that of the fine-bubble aeration systems with a constant CFR. However, for the other two sides, fine-bubble aeration systems were recommended.
- The αOTEs were improved by the increasing CFR, especially for the middle of the aeration systems.
- The average αSOTE prediction formula of the hybrid aeration systems was constructed for the full-scale IFAS process.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Parameters | Concentration |
---|---|
Chemical Oxygen Demand (COD) of influent (mg/L) | 1335 ± 273 |
COD of effluent (mg/L) | 27.3 ± 4.7 |
NH4+-N in influent (mg/L) | 57.9 ± 5.4 |
NH4+-N in effluent (mg/L) | 1.8 ± 0.3 |
Mixed Liquid Suspended Solids (MLSS) (g/L) | 6.5 ± 0.1 |
Temperature of influent (°C) | 10.2 ± 0.5 |
Salinity (g/L) | 2.4 ± 0.2 |
Sludge retention time (d) | 20 ± 0.1 |
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Liu, X.; Bi, X.; Huang, Q.; Wang, X.; Gu, R.; Zhou, X. The Changing and Distribution Laws of Oxygen Transfer Efficiency in the Full-Scale IFAS Process. Water 2021, 13, 1933. https://doi.org/10.3390/w13141933
Liu X, Bi X, Huang Q, Wang X, Gu R, Zhou X. The Changing and Distribution Laws of Oxygen Transfer Efficiency in the Full-Scale IFAS Process. Water. 2021; 13(14):1933. https://doi.org/10.3390/w13141933
Chicago/Turabian StyleLiu, Xuyang, Xuejun Bi, Qing Huang, Xiaodong Wang, Ruihuan Gu, and Xiaolin Zhou. 2021. "The Changing and Distribution Laws of Oxygen Transfer Efficiency in the Full-Scale IFAS Process" Water 13, no. 14: 1933. https://doi.org/10.3390/w13141933