Superposition effect of floating and fixed beds in series for enhancing nitrogen and phosphorus removal in a multistage pond system

Li, Qian; Wang, Xiaochang C.

doi:10.1016/j.scitotenv.2019.133678

Cited by 13 publications

(2 citation statements)

References 55 publications

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“…FTWs were always deployed in groups in surface water systems [19,20]. An unreasonable arrangement of FTWs might lead to dead-zones and associated short-circuiting in the FTW system [2,21,22], which could reduce the residential time and the rate of flow through the plant root zone, resulting in reduced nutrient removal performance.…”

Section: Introductionmentioning

confidence: 99%

Developing a 3D Hydrodynamic and Water Quality Model for Floating Treatment Wetlands to Study the Flow Structure and Nutrient Removal Performance of Different Configurations

et al. 2022

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Floating treatment wetlands (FTWs) are widely used in surface water. The nutrient removal performance depends on both physical processes and chemical/biological transformations in FTWs. However, research describing the coupling processes of hydrodynamic and water quality in the system remains limited. Therefore, a coupled three-dimensional model of hydrodynamic and water quality for FTWs was developed based on the Environmental Fluid Dynamics Code (EFDC). Additional plant drag terms were added to the momentum equations to simulate the suspended canopy effect, and the chemical/biological processes occurring in FTWs were integrated into the original water quality equations simultaneously. The fully calibrated model was used to compare the hydrodynamic characteristics and nutrient removal performance of seven FTW configurations. The modeling results showed that the main stream would turn to the bottom and side of the plant root zone because of the block in FTWs. The differences in the hydrodynamic characteristics among the seven configurations led to a difference in water quality improvement effects. Segmenting a single FTW into a pair of parallel FTWs could achieve the maximum nitrogen and phosphorus mass removal. The results of the study are useful for designing an optimal FTW configuration in surface water.

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Section: Introductionmentioning

confidence: 99%

Developing a 3D Hydrodynamic and Water Quality Model for Floating Treatment Wetlands to Study the Flow Structure and Nutrient Removal Performance of Different Configurations

et al. 2022

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“…It can also be combined with other technologies, and the removal rate of total nitrogen and total phosphorus can reach 71.4% and 51.0% [10][11][12][13][14][15]. Ecological revetment technology in water quality treatment projects has also been widely recognized [16][17][18][19][20][21]. Nevertheless, the applications of these techniques in removing pollutants from the drainage water of the paddy field are limited.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Matrix Dam in the Paddy Field Drainage Ditch on Water Purification Based on the Physical Model Test

Liu

Yang

Shang³

et al. 2022

Sustainability

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(1) Setting a matrix dam in the paddy field drainage ditch has been recognized as an effective method to lower the velocity of water discharged from a paddy field in the drainage ditch, which can improve the purification efficiency of the drainage ditch for nitrogen and phosphorus pollutants, but the specific placement and thickness of the matrix dam have not been supported due to the insufficient research results. (2) Three thicknesses of the matrix dam were set in three locations of the physical model of the drainage ditch. By measuring the flow rate and water level in different sections, the optimal layout location and thickness of the matrix dam were determined. (3) When the matrix dam was located in section 1-1, the flow rate from sections A-A to C1-C1 was reduced by 0.159 m/s; when the matrix dam was located in section 2-2, the flow rate was reduced by 0.331 m/s; when the matrix dam was located in section 3-3, the flow rate was reduced by 0.360 m/s. (4) We concluded that the optimal design position of the matrix dam was section 3-3, 9.2 m from the entrance of the water flume, and the optimal design thickness was 0.3 m.

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Reduction of nutrient fluxes across the sediment–water interface and nutrient accumulation in lotus-fish co-culture aquaculture ponds

Yang,

Sun,

Peng

et al. 2024

Aquacult Int

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Superposition effect of floating and fixed beds in series for enhancing nitrogen and phosphorus removal in a multistage pond system

Cited by 13 publications

References 55 publications

Developing a 3D Hydrodynamic and Water Quality Model for Floating Treatment Wetlands to Study the Flow Structure and Nutrient Removal Performance of Different Configurations

Developing a 3D Hydrodynamic and Water Quality Model for Floating Treatment Wetlands to Study the Flow Structure and Nutrient Removal Performance of Different Configurations

Effect of the Matrix Dam in the Paddy Field Drainage Ditch on Water Purification Based on the Physical Model Test

Reduction of nutrient fluxes across the sediment–water interface and nutrient accumulation in lotus-fish co-culture aquaculture ponds

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