The use of Vertical Flow Constructed Wetlands in Wastewater Treatment

2017 ◽  
Vol 31 (10) ◽  
pp. 3245-3270 ◽  
Author(s):  
Vassilios A. Tsihrintzis
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Vertical Flow ◽  
Vertical Flow Constructed Wetlands

Nitrogen transformation in horizontal and vertical flow constructed wetlands applied for dairy cattle wastewater treatment in southern Brazil

2014 ◽  
Vol 73 ◽  
pp. 307-310 ◽  
Author(s):  
Catiane Pelissari ◽  
Pablo Heleno Sezerino ◽  
Samara Terezinha Decezaro ◽  
Delmira Beatriz Wolff ◽  
Alessandra Pellizzaro Bento ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Dairy Cattle ◽  
Constructed Wetlands ◽  
Nitrogen Transformation ◽  
Vertical Flow ◽  
Southern Brazil ◽  
Vertical Flow Constructed Wetlands

Performance of an integrated system combining microalgae and vertical flow constructed wetlands for urban wastewater treatment

2017 ◽  
Vol 24 (25) ◽  
pp. 20469-20478 ◽  
Author(s):  
Elizandro Oliveira Silveira ◽  
Daiane Moura ◽  
Alexandre Rieger ◽  
Ênio Leandro Machado ◽  
Carlos Alexandre Lutterbeck
Keyword(s):  
Wastewater Treatment ◽  
Constructed Wetlands ◽  
Integrated System ◽  
Vertical Flow ◽  
Urban Wastewater ◽  
Vertical Flow Constructed Wetlands ◽  
Urban Wastewater Treatment

scholarly journals Effect of Plant Species on the Performance and Bacteria Density Profile in Vertical Flow Constructed Wetlands for Domestic Wastewater Treatment in a Tropical Climate

Water ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 3485
Author(s):  
Franck Michaël Zahui ◽  
Jean-Marie Pétémanagnan Ouattara ◽  
Mahamadou Kamagaté ◽  
Lacina Coulibaly ◽  
Alexandros I. Stefanakis
Keyword(s):  
Wastewater Treatment ◽  
Plant Species ◽  
Constructed Wetlands ◽  
Anaerobic Bacteria ◽  
Tropical Climate ◽  
Pennisetum Purpureum ◽  
Aerobic Bacteria ◽  
Vertical Flow ◽  
Vertical Flow Constructed Wetlands ◽  
Andropogon Gayanus

Bacteria are frequently studied due to their involvement in pollutants transformation processes during wastewater treatment. In this study, the treatment efficiency, bacteria densities and their vertical profile were investigated in pilot-scale vertical flow constructed wetlands (VFCW) planted with different plant species under a tropical climate in west Africa. Five beds were planted with local plant species, i.e., Andropogon gayanus, Chrysopogon zizanioides, Echinochloa pyramidalis, Pennisetum purpureum and Tripsacum laxum, while one bed remained unplanted. These species have been rarely used in CWs while some (e.g., T. laxum) are tested for the first time. After a 7-month trial, bacteria densities were measured in substrate samples separated into six layers along the bed depth. Plants presence enhanced the bacterial density and VFCW efficiency; the removal rates of organic matter (90.9–95.9%; COD and 95.2–98.5%; BOD5), nitrogen (74.3–84%; TN and 76–84%; NH4-N) and phosphorus (77.4–96.9%; PO4-P) were higher by 5.9–24.1% compared to the control bed, providing an overall excellent treatment performance for a single-stage VFCW system. Small numbers of anaerobic bacteria were obtained in the VFCWs, explaining the low-to-zero NO3-N removal, except for the VFCWs with T. laxum and P. purpureum. Aerobic bacteria decreased from the upper to bottom layers from 17.4 to 0.1 × 106 CFU/g in the planted beds, while anaerobic bacteria increased from 0.1 to 2.1 × 106 CFU/g. Anaerobic bacteria were more abundant in the unplanted than in the planted beds. The total bacteria count was dominated by aerobic bacteria, and decreased from the surface towards the bottom. Overall, the VFCW with P. purpureum demonstrated the highest efficiency, indicating that this design is an effective and sustainable nature-based solution for wastewater treatment in a tropical climate.

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