A Simulation Experiment on Quality Dynamics of Reclaimed Water under Different Flow Exchanges
Abstract
:1. Introduction
2. Methods
2.1. Experimental Apparatus
2.2. Experimental Processes
- (1)
- Measurement of water quality dynamics
- (2)
- Soil microbial community
2.3. Pollutant Degradation Coefficient
2.4. Soil Microbial Community Richness and Diversity
3. Results and Analysis
3.1. Pollutant Concentration Dynamics under Different Exchange Flow Regimes
3.2. The Effect of Water Exchange Period on Degradation Coeffcicent
3.3. The Effect of the Water Exchange Period on Soil Microbial Communities
4. Discussion
4.1. Reclaimed Water Use
4.2. Water Exchange and Degradation Coefficient
4.3. Limitations of This Study
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Water Quality Indicators | Determination Method |
---|---|
pH | PHscan10S Pen type pH meter |
Dissolved oxygen (DO) | Dissolved oxygen meter DO200A |
Chemical oxygen demand (CODMn) | Automatic CODMn analyzer |
Ammonia nitrogen(NH3–N) | Sodium reagent spectrophotometry |
Total nitrogen (TN) | Titrimetric method after distillation |
Total Phosphorus (TP) | Ammonium Molybdate Spectrophotometric Method |
Electrical conductivity | 2265FS Portable conductivity meter |
Water Quality Index | Reclaimed Water | Mixed Water |
---|---|---|
pH | 8.6 | 8.9 |
Dissolved oxygen (mg/L) | 4.12 | 4.98 |
Ammonia nitrogen (mg/L) | 0.36 | 0.03 |
Nitrate nitrogen (mg/L) | 13.2 | 4.4 |
Nitrite nitrogen (mg/L) | 0.03 | 0.03 |
Chemical oxygen demand (CODMn) (mg/L) | 15 | 34 |
Electrical conductivity (mS/cm) | 1.04 | 0.86 |
Treatments (EFR) | Sequences | Sobs | Shannon | Simpson | Ace | Chao | Coverage | |
---|---|---|---|---|---|---|---|---|
Initial soil | 52,337.00 | 40.00 | 2.10 | 0.21 | 40.35 | 40.00 | 0.99 | |
0 (blank) | 42,166.00 | 35.00 | 1.98 | 0.20 | 39.44 | 37.00 | 0.99 | |
Re | 7 L d−1 | 41,923.00 | 42.00 | 1.91 | 0.25 | 45.28 | 43.50 | 0.99 |
14 L d−1 | 44,819.00 | 43.00 | 2.23 | 0.16 | 44.77 | 43.60 | 0.99 | |
21 L d−1 | 44,241.00 | 41.00 | 2.05 | 0.21 | 42.95 | 42.50 | 0.99 | |
28 L d−1 | 42,071.00 | 36.00 | 1.87 | 0.23 | 46.01 | 38.00 | 0.99 | |
0 (blank) | 45,228.00 | 38.00 | 2.05 | 0.21 | 44.80 | 41.00 | 0.99 | |
7 L d−1 | 42,423.00 | 39.00 | 1.93 | 0.20 | 41.83 | 42.00 | 0.99 | |
Mix | 14 L d−1 | 36,502.00 | 39.00 | 1.71 | 0.31 | 40.65 | 40.50 | 0.99 |
21 L d−1 | 42,777.00 | 42.00 | 1.95 | 0.23 | 44.35 | 42.75 | 0.99 | |
28 L d−1 | 40,726.00 | 39.00 | 2.15 | 0.19 | 39.33 | 39.00 | 0.99 |
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Pan, C.; Guo, Z.; Luo, M. A Simulation Experiment on Quality Dynamics of Reclaimed Water under Different Flow Exchanges. Int. J. Environ. Res. Public Health 2022, 19, 13091. https://doi.org/10.3390/ijerph192013091
Pan C, Guo Z, Luo M. A Simulation Experiment on Quality Dynamics of Reclaimed Water under Different Flow Exchanges. International Journal of Environmental Research and Public Health. 2022; 19(20):13091. https://doi.org/10.3390/ijerph192013091
Chicago/Turabian StylePan, Chengzhong, Zhongfang Guo, and Mingjie Luo. 2022. "A Simulation Experiment on Quality Dynamics of Reclaimed Water under Different Flow Exchanges" International Journal of Environmental Research and Public Health 19, no. 20: 13091. https://doi.org/10.3390/ijerph192013091