A Novel Layered and Advanced Nitrogen Removal Filter with Gravel and Embedded Bio-Organic Carrier Based on Autotrophic and Heterotrophic Pathways
Abstract
:1. Introduction
2. Materials and Methods
2.1. Experimental Setup
2.2. Experimental Materials
2.3. Preparation of Embedded Bio-Organic Carrier and Filmed Gravel
2.4. Experimental Design and Operation
2.5. Analytical Methods
2.5.1. Sampling and Analytical Methods
2.5.2. Anammox Activity Assay
2.5.3. High-Throughput Sequencing
2.5.4. Nitrogen Conversion Pathway
3. Results and Discussion
3.1. Pollutant Removal Performance
3.2. Comparison of Nitrogen Removal between Each Layer
3.3. Nitrogen Conversion Pathway
3.4. Microbial Communities in Each Layer
3.5. Influent Mixing Ratio Model
- NH4+-N in the layered filter comes from the raw water (RW) and secondary effluent (SE); its transfer pathway includes PN and Anammox.
- NO3−-N comes from the SE and Anammox.
- COD comes from the RW and SE.
- NH4+-N in the layered filter is removed completely.
4. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Experimental Phase | NH4+-N (mg·L−1) | NO2−-N (mg·L−1) | NO3−-N (mg·L−1) | COD (mg·L−1) | TP (mg·L−1) | C/N | Time (d) |
---|---|---|---|---|---|---|---|
I | 5 | 0 | 10 | 30 | 0.50 | 2.00 | 1–48 |
Ⅱ | 10 | 0 | 8 | 60 | 1.25 | 3.33 | 49–94 |
Ⅲ | 10 | 0 | 8 | 77 | 1.40 | 4.23 | 95–133 |
Ⅳ | 13 | 0 | 8 | 77 | 1.90 | 3.67 | 134–168 |
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Peng, Z.; Liu, M.; Li, T.; Zhang, W.; Wang, Y.; Yu, L.; Ji, J. A Novel Layered and Advanced Nitrogen Removal Filter with Gravel and Embedded Bio-Organic Carrier Based on Autotrophic and Heterotrophic Pathways. Water 2023, 15, 1919. https://doi.org/10.3390/w15101919
Peng Z, Liu M, Li T, Zhang W, Wang Y, Yu L, Ji J. A Novel Layered and Advanced Nitrogen Removal Filter with Gravel and Embedded Bio-Organic Carrier Based on Autotrophic and Heterotrophic Pathways. Water. 2023; 15(10):1919. https://doi.org/10.3390/w15101919
Chicago/Turabian StylePeng, Zhaoxu, Minghui Liu, Tingmei Li, Wangcheng Zhang, Yanpeng Wang, Luji Yu, and Jiantao Ji. 2023. "A Novel Layered and Advanced Nitrogen Removal Filter with Gravel and Embedded Bio-Organic Carrier Based on Autotrophic and Heterotrophic Pathways" Water 15, no. 10: 1919. https://doi.org/10.3390/w15101919
APA StylePeng, Z., Liu, M., Li, T., Zhang, W., Wang, Y., Yu, L., & Ji, J. (2023). A Novel Layered and Advanced Nitrogen Removal Filter with Gravel and Embedded Bio-Organic Carrier Based on Autotrophic and Heterotrophic Pathways. Water, 15(10), 1919. https://doi.org/10.3390/w15101919