Panicum maximum (Jacq.) density effect upon macrofauna structure in sediments of pilot-scale vertical flow constructed wetlands treating domestic wastewater

Ouattara, Jean-Marie Pétémanagnan; Coulibaly, Lacina; Tiho, Seydou; Ouattara, Allassane; Gourène, Germain

doi:10.1016/j.ecoleng.2010.10.002

Cited by 17 publications

(10 citation statements)

References 17 publications

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“…The corresponding depth segments of unplanted control basins supported only half as many subclasses [143]. Moreover, the density of vegetation can affect the structure of macrofauna in constructed wetlands [144], for example by positively affecting the occurrence of Metazoa [145]. Conversely, Spieles and Horn [146] showed that macroinvertebrates are not well suited as indicators of succession in constructed wetlands as they are primarily affected by the availability of nutrients.…”

Section: Impacts Of Constructed Wetlands On Biodiversitymentioning

confidence: 99%

Biodiversity Impact of Green Roofs and Constructed Wetlands as Progressive Eco-Technologies in Urban Areas

2019

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The total amount of sealed surfaces is increasing in many urban areas, which presents a challenge for sewerage systems and wastewater treatment plants when extreme rainfall events occur. One promising solution approach is the application of decentralized eco-technologies for water management such as green roofs and constructed wetlands, which also have the potential to improve urban biodiversity. We review the effects of these two eco-technologies on species richness, abundance and other facets of biodiversity (e.g., functional diversity). We find that while green roofs support fewer species than ground-level habitats and thus are not a substitute for the latter, the increase in green roof structural diversity supports species richness. Species abundance benefits from improved roof conditions (e.g., increased substrate depth). Few studies have investigated the functional diversity of green roofs so far, but the typical traits of green roof species have been identified. The biodiversity of animals in constructed wetlands can be improved by applying animal-aided design rather than by solely considering engineering requirements. For example, flat and barrier-free shore areas, diverse vegetation, and heterogeneous surroundings increase the attractiveness of constructed wetlands for a range of animals. We suggest that by combining and making increasing use of these two eco-technologies in urban areas, biodiversity will benefit.

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Section: Impacts Of Constructed Wetlands On Biodiversitymentioning

confidence: 99%

Biodiversity Impact of Green Roofs and Constructed Wetlands as Progressive Eco-Technologies in Urban Areas

2019

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“…The signi cant differences in aerobic bacteria density between the rst two layers and that of the bottom in planted beds, and between the rst three surface layer and that of the bottom in unplanted bed could be explained by the abundant roots and macroinvertebrates in the surface layers, whose their activities would further aerate the super cial layers of the wetland (Ouattara et al 2009(Ouattara et al , 2011. Moreover, the difference of bacteria density observed between the planted beds is due to from the morphology of the different plants in the wetlands.…”

Section: Bacterial Density In Cwsmentioning

confidence: 99%

Bacterial Biomass Effect on Performance Improving of Vertical Flow Constructed Wetlands for Domestic Wastewater Treatment

Zahui

Ouattara

Kamagaté³

et al. 2021

Preprint

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Bacteria are frequently studied in constructed wetlands (CWs) due to their effective involvement in pollutants purification processes. In this study, aerobic, anaerobic and total bacteria densities and their vertical distribution profile within pilot-scale vertical flow CWs planted with different plant species were investigated. Five beds were planted in monoculture with Andropogon gayanus, Chrysopogon zizanioides, Echinochloa pyramidalis, Pennisetum purpureum and Tripsacum laxum, and one unplanted bed was used as control. At the end of the treatment trial, bacteria were collected by taking cores of sediment samples at the corners and the center of each bed following six layers in the vertical profile. In fact, the presence of plants on CWs improved the bacterial density and removal efficiencies in the system, with yields from 5.9 to 24.1% regardless the pollutant. However, few anaerobic bacteria were obtained in the different wetlands, and unable to reduce NO3−, excluding for beds planted with T. laxum and P. purpureum. Besides, the number of aerobic bacteria determined decreased (i.e., 17.4 106 to 0.1 106 CFU.g− 1), while that of anaerobic bacteria increased (i.e., 0.1 106 to 2.1 106 CFU.g− 1) from the upper to the bottom layers in the planted beds. Otherwise, anaerobic bacteria were more abundant in the control than in planted beds. Then, total bacteria were dominated by aerobic bacteria, and decreased from surface toward the bottom. As P purpureum promotes the best performance, CWs with this type of plant could be a cost-effective alternative method of treating wastewater.

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“…The plants thus transplanted were fed with tap water for one month to allow acclimatize. After the acclimation period, each bed was intermittently fed (3 days/week) with 23.64 × 10 -3 m/d hydraulic loading of synthetic domestic wastewater according to Ouattara et al (2008Ouattara et al ( , 2009Ouattara et al ( , 2011) over 6 months. The synthetic domestic wastewater tank was cleaned before and after the feeding of beds to remove all the impurities settled.…”

Section: Experimental Procedure:-mentioning

confidence: 99%

Vegetation Effect Upon Macroinvertebrate Communities in a Vertical-Flow Constructed Wetland Treating Domestic Wastewater.

Zahui¹

2018

IJAR

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Panicum maximum (Jacq.) density effect upon macrofauna structure in sediments of pilot-scale vertical flow constructed wetlands treating domestic wastewater

Cited by 17 publications

References 17 publications

Biodiversity Impact of Green Roofs and Constructed Wetlands as Progressive Eco-Technologies in Urban Areas

Biodiversity Impact of Green Roofs and Constructed Wetlands as Progressive Eco-Technologies in Urban Areas

Bacterial Biomass Effect on Performance Improving of Vertical Flow Constructed Wetlands for Domestic Wastewater Treatment

Vegetation Effect Upon Macroinvertebrate Communities in a Vertical-Flow Constructed Wetland Treating Domestic Wastewater.

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