Spatial and temporal variations of greenhouse gas emissions from a waste stabilization pond: Effects of sludge distribution and accumulation
作者： Peter Goethals , Johan Six , Matti Barthel , Samuel Bode , Pascal Boeckx
DOI: 10.1016/J.WATRES.2021.116858
关键词:
摘要: Due to regular influx of organic matter and nutrients, waste stabilization ponds (WSPs) can release considerable quantities greenhouse gases (GHGs). To investigate the spatiotemporal variations GHG emissions from WSPs with a focus on effects sludge accumulation distribution, we conducted bathymetry survey two sampling campaigns in Ucubamba WSP (Cuenca, Ecuador). The results indicated that spatial variation was strongly dependent distribution. Thick layers aerated facultative caused substantial CO2 CH4 which accounted for 21.3% 78.7% total plant. Conversely, prevalence anoxic conditions stimulated N2O consumption via complete denitrification leading net uptake atmosphere, i.e. up 1.4±0.2 mg-N m-2 d-1. Double emission rates were found maturation during day compared night-time emissions, indicating important role algal respiration, while no diel found. Despite N2O, higher than constructed wetlands conventional centralized wastewater treatment facilities. Hence, it is recommended management proper desludging regulation should be included as an mitigation measure reduce carbon footprint pond
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