Vegetated treatment area (VTAs) efficiencies for E. coli and nutrient removal on small-scale swine operations

Harmel, R. Daren; Pampell, Rehanon; Gentry, Terry J.; Smith, Doug; Hajda, Chad; Wagner, Kevin; Smith, Patti K.; Haney, Richard L.; Higgs, Kori D.

doi:10.1016/j.iswcr.2018.02.002

Cited by 7 publications

(2 citation statements)

References 37 publications

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“…have typically examined various forms of N (Alemu et al, 2017). As Harmel et al reported, VFS significantly reduced total N from swine feedlots by 81%-86% over a 4-year study, but less effectively trapped nitrate, which is the most total dissolved form of N (Harmel et al, 2018). The effectiveness of VFS in removing suspended solids explains why sediment-bound forms of nutrients are efficiently removed, and why TN removal is positively correlated with suspended solids removal (Yang et al, 2015;Alemu et al, 2017).…”

Section: Effect Of Rb-prb With Vfs On Nitrogen Loss From Sloping Farm...mentioning

confidence: 99%

Reduction of nitrogen loss in runoff from sloping farmland by a ridged biochar permeable reactive barrier with vegetated filter strips

Zhang,

Gao,

et al. 2024

Front. Environ. Sci.

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IntroductionEutrophication due to nitrogen (N) loss from sloping farmland has a high risk in the Three Gorges Reservoir. Biochar and vegetated filter strips (VFS) are used to control nutrient runoff and increase soil water-holding capacity, soil nutrient retention, and crop yield. However, surface biochar application has limited ability to control N loss, especially from sloping farmland.MethodsIn this study, different widths of ridged biochar permeable reactive barrier (RB-PRB) with VFS were employed to intercept N loss in runoff from sloping farmland. Adsorption characteristics of biochar for nitrate and ammonium N were evaluated using isothermal and kinetic adsorption models before field experiments. N index values for ammonium (NH4+), nitrate (NO3−), dissolved N (DTN), particulate N (PN), and total N (TN) lost through runoff were monitored from April 2019 to January 2020.ResultsNO3− and NH4+ sorption on biochar was predominantly physical adsorption with a maximum capacity of 4.51 and 4.12 mg g-1, respectively. During the research period, the dominant transportation pathway of N loss involved dissolved total N movement through subsurface flow, which accounted for 65.55% of the total loss. TN loss for CK was 1954 g·hm-2, while RB-PRB and VFS decreased N loss from sloping farmland by 36.7%. The interception efficiency of RB-PRB was highest at 0.3 m width. VFS successfully intercepted particulate N and reduced it by 32.75%. In terms of soil nutrients, the RB-PRB and VFS interventions led to a substantial 41.69% increase in the TN content of the soil at a 0.4 m width.DiscussionThe findings suggest that biochar has a favorable adsorption effect on NH4+ and NO3−, an appropriate width of RB-PRB with VFS could effectively reduce nitrogen loss from sloping farmland. Simultaneously, it enhances the water and fertilizer retention capacity of sloping cropland soil; however, the long-term implications necessitate further validation.

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Section: Effect Of Rb-prb With Vfs On Nitrogen Loss From Sloping Farm...mentioning

confidence: 99%

Reduction of nitrogen loss in runoff from sloping farmland by a ridged biochar permeable reactive barrier with vegetated filter strips

Zhang,

Gao,

et al. 2024

Front. Environ. Sci.

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“…Fajardo et al (2001) observed 64%–87% concentration reductions of coliform by VFS in runoff from livestock confinement areas. More recently, vegetative treatment areas of perennial grasses were found to significantly reduce loads and concentrations of E. coli in runoff from small‐scale swine operations (Harmel et al, 2018). In general, much less is known about the efficacy in retaining microorganisms associated with swine manure applications to agricultural fields than from other manure sources (Cardoso et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Prairie strips reduce fecal indicator bacteria concentrations in simulated runoff

Craig

Rehmann

Alt

et al. 2022

J American Water Resour Assoc

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Incorporating vegetative filter strips (VFS) in agroecosystems can reduce the downstream dissemination of sediments and manure-borne contaminants, including nutrients and fecal organisms from agricultural runoff. One source of these contaminants is swine manure, a valuable source of nitrogen and phosphorus that is commonly applied at agronomic rates as an organic fertilizer on agricultural land. In addition to nutrients, manure contains complex microbial communities and potentially pathogenic bacteria that could pose a threat to human health.Additionally, its offsite movement of nutrients and fecal contaminants is a substantial threat to surface water quality (Burkholder et al., 1997;

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Treatment of municipal wastewater by vertical subsurface flow constructed wetland: Data collection on removal efficiency using Phragmites Australis and Cyperus Papyrus

García-Ávila

2020

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Vegetated treatment area (VTAs) efficiencies for E. coli and nutrient removal on small-scale swine operations

Cited by 7 publications

References 37 publications

Reduction of nitrogen loss in runoff from sloping farmland by a ridged biochar permeable reactive barrier with vegetated filter strips

Reduction of nitrogen loss in runoff from sloping farmland by a ridged biochar permeable reactive barrier with vegetated filter strips

Prairie strips reduce fecal indicator bacteria concentrations in simulated runoff

Treatment of municipal wastewater by vertical subsurface flow constructed wetland: Data collection on removal efficiency using Phragmites Australis and Cyperus Papyrus

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