1. Performance and reliability comparison of French vertical flow treatment wetlands with other decentralized wastewater treatment technologies in tropical climates
- Author
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Rémi Lombard-Latune, Pascal Molle, Florent Leriquier, Bernard Le Guennec, Lucas Pelus, Gérald Lacombe, Chafatayne Oucacha, Réduire, valoriser, réutiliser les ressources des eaux résiduaires (UR REVERSAAL), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), MARTINIQUE WATER OFFICE ODE FORT DE FRANCE MTQ, Partenaires IRSTEA, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), ETIAGE GUYANE GUF, Agence Française pour la Biodiversité (AFB), and French Agency for Biodiversity
- Subjects
Environmental Engineering ,Sanitation ,constructed wetland ,0208 environmental biotechnology ,Wetland ,02 engineering and technology ,010501 environmental sciences ,Wastewater ,Rotating biological contactor ,01 natural sciences ,Waste Disposal, Fluid ,rotating biological contactor ,activated sludge ,[SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology ,Effluent ,facultative pond ,Reliability (statistics) ,0105 earth and related environmental sciences ,Water Science and Technology ,[SDV.EE]Life Sciences [q-bio]/Ecology, environment ,geography ,Tropical Climate ,geography.geographical_feature_category ,Environmental engineering ,Reproducibility of Results ,6. Clean water ,020801 environmental engineering ,Activated sludge ,Wetlands ,Facultative lagoon ,Environmental science ,Sewage treatment ,coefficient of reliability ,Brazil - Abstract
When implementing a sanitation system, the selection of treatment process can be difficult. Beyond removal efficiency and effluent concentrations, reliability should be taken into account. This study compares reliability of French vertical flow treatment wetlands (F-VFTW) with the four main decentralized wastewater treatment technologies in small communities in the French Overseas Territories (FOT). Analysis of 963 regulatory self-monitoring sampling campaigns performed on 213 wastewater treatment plants show that operational disruptions due to sludge loss and loss of nitrification are often reported for activated sludge technology; rotating biological contactors often suffer from weak settlement; facultative pond removal is limited by algae; and F-VFTW fulfills all the French regulatory objectives at a frequency of 90 to 95%. In addition, the data from this study are compared to a similar database from Brazil using a statistical approach (coefficient of reliability). Amongst the eight decentralized wastewater treatment technologies evaluated, F-VFTW appears to be the most appropriate for achieving the discharge standard with a reliability close to 95%. Its reliability to face both environmental (rainfall) and social (maintenance capacities) constraints is a key parameter.
- Published
- 2020
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