An evaluation of a constructed wetland to treat wastewater from a dairy farm in Maryland, USA

1999 ◽  
Vol 14 (1-2) ◽  
pp. 199-206 ◽  
Author(s):  
Jennifer A. Schaafsma ◽  
Andrew H. Baldwin ◽  
Christopher A. Streb
Keyword(s):  
Constructed Wetland ◽  
Dairy Farm

scholarly journals Treatment of Combined Dairy and Domestic Wastewater with Constructed Wetland System in Sicily (Italy). Pollutant Removal Efficiency and Effect of Vegetation

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1086
Author(s):  
Mario Licata ◽  
Roberto Ruggeri ◽  
Nicolò Iacuzzi ◽  
Giuseppe Virga ◽  
Davide Farruggia ◽  
...  
Keyword(s):  
Plant Growth ◽  
Organic Compounds ◽  
Removal Efficiency ◽  
Constructed Wetland ◽  
Organic Pollutant ◽  
Dairy Farm ◽  
Domestic Wastewater ◽  
Pollutant Removal ◽  
Dairy Wastewater ◽  
Giant Reed

Dairy wastewater (DWW) contains large amounts of mineral and organic compounds, which can accumulate in soil and water causing serious environmental pollution. A constructed wetland (CW) is a sustainable technology for the treatment of DWW in small-medium sized farms. This paper reports a two-year study on the performance of a pilot-scale horizontal subsurface flow system for DWW treatment in Sicily (Italy). The CW system covered a total surface area of 100 m2 and treated approximately 6 m3 per day of wastewater produced by a small dairy farm, subsequent to biological treatment. Removal efficiency (RE) of the system was calculated. The biomass production of two emergent macrophytes was determined and the effect of plant growth on organic pollutant RE was recorded. All DWW parameters showed significant differences between inlet and outlet. For BOD5 and COD, RE values were 76.00% and 62.00%, respectively. RE for total nitrogen (50.70%) was lower than that of organic compounds. RE levels of microbiological parameters were found to be higher than 80.00%. Giant reed produced greater biomass than umbrella sedge. A seasonal variation in RE of organic pollutants was recorded due to plant growth rate Our findings highlight the efficient use of a CW system for DWW treatment in dairy-cattle farms.

Phosphorus adsorption characteristics of a constructed wetland soil receiving dairy farm wastewater

2002 ◽  
Vol 82 (1) ◽  
pp. 97-104 ◽  
Author(s):  
T. S. Jamieson ◽  
G. W. Stratton ◽  
R. Gordon ◽  
A. Madani
Keyword(s):  
Constructed Wetland ◽  
Dairy Farm ◽  
Wetland Soil ◽  
Deep Zone ◽  
Phosphorus Adsorption ◽  
P Adsorption ◽  
Adsorption Characteristics ◽  
Shallow Zone ◽  
Background Soil ◽  
P Removal

Adsorption to soil has been identified as a key wastewater P removal mechanism in treatment wetlands. Batch incubation experiments were performed to measure the capacity of a constructed dairy farm wetland in Pictou County, Nova Scotia, to remove P from solution. The constructed wetland had been receiving wastewater since 1996. Non-linear regression analysis was performed using the Langmuir adsorption model to describe the P adsorption characteristics for the wetland soil under study. The Langmuir model was adequate in describing the P adsorption characteristics of the system studied. The P adsorption maxima found were approximately 925, 924, and 1600 mg P kg-1 soil, for the deep zone soil, shallow zone soil, and a background soil (not receiving wastewater), respectively. The P adsorption maxima for the deep zone and shallow zone soils were not significantly different (P > 0.05) from one another, but were significantly lower (P < 0.05) than the background soil. These data, together with information on wastewater inflow and P loading, were used to predict a lifespan of 8 yr for this wetland, relative to P removal. Key Words: Phosphorus, wetlands, constructed, adsorption, Langmuir, saturation

Assessment of microbial load removal potential of vertical constructed wetland systems treating dairy farm wastewater

2021 ◽  
pp. 127-145
Author(s):  
Deepa Minakshi ◽  
Swati Singh ◽  
Pradeep Kumar Sharma ◽  
Anju Rani ◽  
Piyush Malaviya
Keyword(s):  
Constructed Wetland ◽  
Dairy Farm ◽  
Microbial Load ◽  
Load Removal ◽  
Farm Wastewater

scholarly journals Benefits and costs of a constructed wetland on a Wairarapa dairy farm

2015 ◽  
Vol 77 ◽  
pp. 173-176
Author(s):  
J.Praat J.Sukias T. Faulkner ◽  
A. Bichan
Keyword(s):  
Water Quality ◽  
Constructed Wetland ◽  
Nitrate Nitrogen ◽  
Dairy Farm ◽  
Community Support ◽  
Nutrient Loss ◽  
Loss Mitigation ◽  
Nitrate N ◽  
Complex Solutions ◽  
Benefits And Costs

A demonstration wetland was constructed with community support in what was a "wet" 0.75 ha of a Wairarapa dairy farm. This has reduced the level of nitrate-nitrogen leaving the farm, and has also added biodiversity to the farm and the region. Comparison of nitrate-N levels of water flowing in and out of the wetland over three months show this water quality benefit may reduce farm N loss from 14 down to 13 kg N/ha/yr, which equates to an ongoing reduction of around 7% for a one-off investment of at least $55l000. However, other contaminants such as dissolved reactive phosphate may not necessarily be reduced, while counts of Escherichia coli increased in wetland outflow. This project required a range of skills unlikely to be available to an individual farmer without wider community support but now that the wetland is established it will demonstrate what is possible when more complex solutions are implemented for nutrient loss mitigation. Keywords: dairy farm, constructed wetland, denitrification, nitrate-N, water quality, biodiversity

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