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Title: Spatial and temporal variations of greenhouse gas emissions from a waste stabilization pond: effects of sludge distribution and accumulation
Other Titles: Spatial and temporal variations of greenhouse gas emissions from a waste stabilization pond: effects of sludge distribution and accumulation
Authors: Ho, Long
Jerves Cobo, Ruben Fernando
Morales Matute, Oscar Patricio
Larriva Vasquez, Josue Bernardo
Arevalo Durazno, Maria Belen
Barthel, Matti
Six, Johan
Bode, Samuel
Boeckx, Pascal
Goethals, Peter
metadata.dc.ucuenca.correspondencia: Ho, Long, Long.TuanHo@UGent.be
Keywords: Greenhouse gas
Stabilization pond
Carbon dioxide
Nitrous oxide
Spatiotemporal variation
metadata.dc.ucuenca.areaconocimientofrascatiamplio: 1. Ciencias Naturales y Exactas
metadata.dc.ucuenca.areaconocimientofrascatidetallado: 1.5.8 Ciencias del Medioambiente
metadata.dc.ucuenca.areaconocimientofrascatiespecifico: 1.5 Ciencias de la Tierra y el Ambiente
metadata.dc.ucuenca.areaconocimientounescoamplio: 05 - Ciencias Físicas, Ciencias Naturales, Matemáticas y Estadísticas
metadata.dc.ucuenca.areaconocimientounescodetallado: 0521 - Ciencias Ambientales
metadata.dc.ucuenca.areaconocimientounescoespecifico: 052 - Medio Ambiente
Issue Date: 2021
metadata.dc.ucuenca.embargoend: 19-May-2050
metadata.dc.ucuenca.volumen: Volumen 913
metadata.dc.source: Water Research
metadata.dc.identifier.doi: 10.1016/j.watres.2021.116858
metadata.dc.type: ARTÍCULO
Due to regular influx of organic matter and nutrients, waste stabilization ponds (WSPs) can release considerable quantities of greenhouse gases (GHGs). To investigate the spatiotemporal variations of GHG emissions from WSPs with a focus on the effects of sludge accumulation and distribution, we conducted a bathymetry survey and two sampling campaigns in Ucubamba WSP (Cuenca, Ecuador). The results indicated that spatial variation of GHG emissions was strongly dependent on sludge distribution. Thick sludge layers in aerated ponds and facultative ponds caused substantial CO 2 and CH 4 emissions which accounted for 21.3% and 78.7% of the total emissions from the plant. Conversely, the prevalence of anoxic conditions stimulated the N 2 O consumption via complete denitrification leading to a net uptake from the atmosphere, i.e. up to 1.4 ±0.2 mg-N m −2 d −1 . Double emission rates of CO 2 were found in the facultative and maturation ponds during the day compared to night-time emissions, indicating the important role of algal respiration, while no diel variation of the CH 4 and N 2 O emissions was found. Despite the uptake of N 2 O, the total GHG emissions of the WSP was higher than constructed wetlands and conventional cen- tralized wastewater treatment facilities. Hence, it is recommended that sludge management with proper desludging regulation should be included as an important mitigation measure to reduce the carbon foot- print of pond treatment facilities.
URI: https://www.sciencedirect.com/science/article/abs/pii/S0043135421000567
metadata.dc.ucuenca.urifuente: https://www.sciencedirect.com/journal/water-research
ISSN: 00431354, 18792448
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