Nutrient removal by a constructed wetland treating subsurface drainage from grazed dairy pasture

Tanner, Chris C.; Nguyen, M. L.; Sukias, J.P.S.

doi:10.1016/j.agee.2004.05.008

Cited by 138 publications

(78 citation statements)

References 46 publications

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“…In the samplings with the best results, it was observed that the treatment using horizontal subsurface-flow CWS was able to remove 76.5, 50.5, 37.4 and 64.4% of TKN, ammonia, nitrate and nitrite, respectively. These results are similar to those observed by many authors (Ucker et al, 2012;Matos et al, 2010;Tanner et al, 2005). It is important to point out that no chemical treatment was performed in the present study, only biological treatment for the removal of pollutants.…”

Section: Guimares Et Al 4547supporting

confidence: 81%

“…It should be pointed out that, although the CWS did not promote high efficiency in the removal of pollutants, it showed results similar to those observed by Stone et al (2004) and Tanner et al (2005). Therefore, the CWS with horizontal subsurface flow can be used in the posttreatment of wastewaters.…”

Section: Guimares Et Al 4547mentioning

confidence: 65%

“…The lowest and the highest efficiency of the system occurred in the removal of nitrate and nitrite, respectively. Also, the adopted CWS promoted reasonable performance in the removal of pollutants (Tanner et al, 2005;Vymazal, 2007).…”

Section: Nitrogenmentioning

confidence: 99%

“…An important factor that may have promoted this result is the hydraulic retention time used in the present study, which was 33.6 h, because the lack of contact time necessary between the effluent and the substrate of the CWS can reduce its efficiency (Fia et al, 2010). Tanner et al (2005) used cultivated beds in the treatment of wastewater from dairy cattle farming and obtained a total N removal of 79% in the first year and only 21% the second year.…”

Section: Guimares Et Al 4547mentioning

confidence: 99%

See 3 more Smart Citations

Removal of nitrogen and phosphorus from cattle farming wastewater using constructed wetland system

Geovana¹,

Dinara²,

Marcos³

et al. 2016

Afr. J. Agric. Res.

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The confined dairy cattle system employs the most modern production techniques with respect to the genetic standards of the herds. The success found in these systems promoted an increase in the number of confined animals and, consequently, an increase in the produced volume of waste, causing the waste from dairy cattle farming to be one of the largest problems in intensive management systems. This effluent has high amount of phosphorus and nitrogen, and the accumulation of these nutrients in surface waters can cause eutrophication of water courses deteriorating their quality. This study is aimed to evaluate the efficiency of a constructed wetland system, cultivated with vetiver grass (Vetiveria zizanioides) in the removal of important environmental pollutants nitrogen (N) and phosphorus (P) from dairy cattle farming wastewater. The effluent received pre-treatment and before passing through the constructed wetland system which was built in a trapezoidal shape. The wastewater from dairy cattle farming, at the inlet and outlet of the constructed wetland system, was biweekly analyzed for different forms of N (ammonia, total Kjeldahl N, nitrate and nitrite) and P. The constructed wetland system proposed cultivated with vetiver grass showed good removal pollutants with greater mean efficiency in the removal of nitrite (43.6%), the total Kjeldahl nitrogen (32.0%) and ammonia (31.0%). Vetiver grass cultivation showed good adaptation to the constructed wetland system, with satisfactory development and no visual symptoms of nutrients deficiency.

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Section: Guimares Et Al 4547supporting

confidence: 81%

Section: Guimares Et Al 4547mentioning

confidence: 65%

Section: Nitrogenmentioning

confidence: 99%

Section: Guimares Et Al 4547mentioning

confidence: 99%

See 2 more Smart Citations

Removal of nitrogen and phosphorus from cattle farming wastewater using constructed wetland system

Geovana¹,

Dinara²,

Marcos³

et al. 2016

Afr. J. Agric. Res.

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“…Constructed wetlands (CWs) are artificial sinks for Nr (Galloway et al, 2003;Tanner et al, 2005), and have been successfully used to treat domestic sewage, urban runoff and storm water, industrial and agricultural wastewater, and leachate. While the biogeochemistry of wetlands in general has been discussed in the literature (Whalen, 2005;Reddy and Delaune, 2008), less is known about the delivery pathways of the transformation products of carbon (C) and N from CWs treating wastewater.…”

Section: Introductionmentioning

confidence: 99%

Carbon and nitrogen dynamics and greenhouse gas emissions in constructed wetlands treating wastewater: a review

Jahangir

Richards

Healy

et al. 2016

Hydrol. Earth Syst. Sci.

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Abstract. The removal efficiency of carbon (C) and nitrogen (N) in constructed wetlands (CWs) is very inconsistent and frequently does not reveal whether the removal processes are due to physical attenuation or whether the different species have been transformed to other reactive forms. Previous research on nutrient removal in CWs did not consider the dynamics of pollution swapping (the increase of one pollutant as a result of a measure introduced to reduce a different pollutant) driven by transformational processes within and around the system. This paper aims to address this knowledge gap by reviewing the biogeochemical dynamics and fate of C and N in CWs and their potential impact on the environment, and by presenting novel ways in which these knowledge gaps may be eliminated. 4 emissions. Mixed species of vegetation perform better than monocultures in increasing C and N removal and decreasing greenhouse gas (GHG) emissions, but empirical evidence is still scarce. Lower hydraulic loadings with higher hydraulic retention times enhance nutrient removal, but more empirical evidence is required to determine an optimum design. A conceptual model highlighting the current state of knowledge is presented and experimental work that should be undertaken to address knowledge gaps across CWs, vegetation and wastewater types, hydraulic loading rates and regimes, and retention times, is suggested. We recommend that further research on process-based C and N removal and on the balancing of end products into reactive and benign forms is critical to the assessment of the environmental performance of CWs.

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Changes in benthic nutrient sources within a wetland after hydrologic reconnection

Kuwabara

Topping

Carter

et al. 2012

Enviro Toxic and Chemistry

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Removing dams and levees to restore hydrologic connectivity and enhance ecosystem services such as nutrient removal has been an increasingly common management practice. In the present study, the authors assessed geochemical and biological changes following engineered levee breaches that reconnected eutrophic Upper Klamath Lake and Agency Lake, Oregon, USA, to an adjacent, historic wetland that had been under agricultural use for the last seven decades. Over the three-year study, the reconnected wetland served as a benthic source for both macronutrients (dissolved organic carbon [DOC], soluble reactive phosphorus [SRP], and ammonia) and micronutrients (dissolved iron and manganese). The magnitude of those benthic sources was similar to or greater than that of allochthonous sources. The highest DOC benthic flux to the water column occurred immediately after rewetting occurred. It then decreased during the present study to levels more similar to the adjacent lake. Dissolved ammonia fluxes, initially negative after the levee breaches, became consistently positive through the remainder of the study. Nitrate fluxes, also initially negative, became negligible two years after the levee breaches. In contrast to previous laboratory studies, SRP fluxes remained positive, as did fluxes of dissolved iron and manganese. Our results indicate that the timescales of chemical changes following hydrologic reconnection of wetlands are solute-specific and in some cases extend for multiple years beyond the reconnection event. During the present study, colonization of the reconnected wetlands by aquatic benthic invertebrates gradually generated assemblages similar to those in a nearby wetland refuge and provided further evidence of the multiyear transition of this area to permanent aquatic habitat. Such timescales should be considered when developing water-quality management strategies to achieve wetland-restoration goals.

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Nutrient removal by a constructed wetland treating subsurface drainage from grazed dairy pasture

Cited by 138 publications

References 46 publications

Removal of nitrogen and phosphorus from cattle farming wastewater using constructed wetland system

Removal of nitrogen and phosphorus from cattle farming wastewater using constructed wetland system

Carbon and nitrogen dynamics and greenhouse gas emissions in constructed wetlands treating wastewater: a review

Changes in benthic nutrient sources within a wetland after hydrologic reconnection

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