Role of three different plants on simultaneous salt and nutrient reduction from saline synthetic wastewater in lab-scale constructed wetlands

2017 ◽  
Vol 579 ◽  
pp. 447-455 ◽  
Author(s):  
João M. Jesus ◽  
A.C. Cassoni ◽  
Anthony S. Danko ◽  
António Fiúza ◽  
Maria-Teresa Borges
Keyword(s):  
Constructed Wetlands ◽  
Synthetic Wastewater ◽  
Nutrient Reduction

scholarly journals How to introduce new technologies to reduce nutrient losses: a case of Danish agricultural constructed wetlands

Water Policy ◽  
2017 ◽  
Vol 19 (3) ◽  
pp. 404-422 ◽  
Author(s):  
Florence Gathoni Gachango ◽  
Brian H. Jacobsen
Keyword(s):  
Constructed Wetlands ◽  
Implementation Strategy ◽  
New Technologies ◽  
Secondary Data ◽  
Policy Instrument ◽  
Nutrient Losses ◽  
Voluntary Approach ◽  
Depth Analysis ◽  
Environmental Measures

The Water Framework Directive (WFD) focuses on reduction of nutrients in individual water bodies. Innovative drainage filter technologies currently being tested in Denmark could facilitate nutrient reductions at the sub-river basins and catchment levels. The implementation strategy for these technologies, however, remains a challenge. Using both primary and secondary data, this paper presents an in-depth analysis of the role of these technologies in implementation of the WFD in Denmark. Concepts of impact assessment are used to identify the most suitable approach for incorporating these technologies into environmental measures based on a three-faceted policy instrument typology. A voluntary approach supported by investment subsidies, or incentives that could replace existing requirements, is deemed more appropriate.

scholarly journals Artificial floating islands for water quality improvement

2017 ◽  
Vol 25 (3) ◽  
pp. 350-357 ◽  
Author(s):  
Yueya Chang ◽  
He Cui ◽  
Minsheng Huang ◽  
Yan He
Keyword(s):  
Water Quality ◽  
Quality Improvement ◽  
Constructed Wetlands ◽  
Oxygen Demand ◽  
Key Factors ◽  
Water Quality Improvement ◽  
Factors Influencing ◽  
Wetland Treatment ◽  
Improve Water Quality

Artificial floating islands (AFIs) are a variation of wetland treatment systems for water quality improvement. This paper provides a review concerning AFIs in terms of their development, classification, and applications in the removal of nutrients, heavy metals, and chemical oxygen demand on waterways. The role of microorganisms, aquatic plants, and aquatic animals in AFIs for water decontamination and purification was also discussed. Additionally, some key factors influencing the AFIs’ performances were discussed and comparisons between AFIs and constructed wetlands were reviewed. Finally, further perspectives of artificial floating islands were identified to possibly improve their performances. The understanding of the mechanisms in AFIs that drive removal of various contaminants to improve water quality is crucial, and is also highlighted in this paper.

Assessing the role of microbial communities in the performance of constructed wetlands used to treat combined sewer overflows

2020 ◽  
Vol 736 ◽  
pp. 139519
Author(s):  
Jan P. Ruppelt ◽  
Katharina Tondera ◽  
Sarah J. Wallace ◽  
Mark Button ◽  
Johannes Pinnekamp ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Constructed Wetlands ◽  
Combined Sewer Overflows ◽  
Combined Sewer ◽  
Sewer Overflows

French vertical flow constructed wetlands: a need of a better understanding of the role of the deposit layer

2013 ◽  
Vol 69 (1) ◽  
pp. 106-112 ◽  
Author(s):  
Pascal Molle
Keyword(s):  
Constructed Wetlands ◽  
Organic Layer ◽  
Vertical Flow ◽  
Biological Behaviour ◽  
Positive Role ◽  
Vertical Flow Constructed Wetlands ◽  
Key Factor ◽  
Deposit Layer ◽  
Raw Wastewater

French vertical flow constructed wetlands, treating directly raw wastewater, have become the main systems implemented for communities under 2,000 population equivalent in France. Like in sludge drying reed beds, an organic deposit layer is formed over time at the top surface of the filter. This deposit layer is a key factor in the performance of the system as it impacts hydraulic, gas transfers, filtration efficiency and water retention time. The paper discusses the role of this deposit layer on the hydraulic and biological behaviour of the system. It presents results from different studies to highlight the positive role of the layer but, as well, the difficulties in modelling this organic layer. As hydraulic, oxygen transfers, and biological activity are interlinked and impacted by the deposit layer, it seems essential to focus on its role (and its quantification) to find new developments of vertical flow constructed wetlands fed with raw wastewater.

scholarly journals The Role of Macrophytes in the Removal of Organic Micropollutants by Constructed Wetlands

2018 ◽  
pp. 286-325
Author(s):  
A. Dordio ◽  
A.J.P. Carvalho ◽  
M. Hijosa-Valsero ◽  
E. Becares
Keyword(s):  
Constructed Wetlands ◽  
Organic Micropollutants

scholarly journals Phytoremediation of chromium(VI) using Colocasia esculenta in laboratory scale constructed wetlands

2021 ◽  
Vol 6 (1) ◽  
pp. 45-49
Author(s):  
Chan Kar Men ◽  
Rozidaini Mohd Ghazi
Keyword(s):  
Heavy Metals ◽  
Constructed Wetlands ◽  
Water Scarcity ◽  
Colocasia Esculenta ◽  
Laboratory Scale ◽  
Synthetic Wastewater ◽  
Anthropogenic Emission ◽  
Chromium Vi ◽  
Set Up ◽  
Soil And Water

The existing water is becoming polluted nowadays due to high anthropogenic emission of water. The phytoremediation technology is used to treat the contaminated soil and water which containing higher amount of pollutants. The water that contains heavy metals will cause water scarcity and affect on human health when human drink the water. In this study, Colocasia esculenta was chosen for the removal of Cr(VI) in water. The efficiency of C.esculenta in accumulates Cr(VI) in synthetic wastewater was evaluated. The effect of time and concentration of Cr(VI) were identified in this study. Cr(VI) concentration was determined using diphenylcarbazide method (DPC). Experiment were set up in Laboratory Scale Constructed Wetlands with varies the concentration of synthetic wastewater of 1, 2, 5, 10, 50, 500 and 1000 mg/L and was continued for 36 days. The result of removal percentage for the 1, 2, 5 and 10 mg/L reach 100% while for 50, 500 and 1000 mg/L only remove 99.99%, 94.79% and 55.84% respectively. Roots of C.esculenta are able to accumulate Cr(VI) in wastewater which with BCF value was 1.557 mg/L. The BCF value of roots were more than 1, represents the higher accumulation of metal in plant. Therefore, C.esculenta has potential to use in removing Cr(VI) in water.

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