Analysis of empirical methods for the quantification of N2O emissions in wastewater treatment plants: comparison of emission results obtained from the IPCC Tier 1 methodology and the methodologies that integrate operational data
| Autor: | Leonor Patricia Güereca, A.D. Reyes-Figueroa, Monserrat Ramírez-Melgarejo, Santiago Gassó-Domingo |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Doctorat en Enginyeria Ambiental, Universitat Politècnica de Catalunya. Departament d'Enginyeria de Projectes i de la Construcció, Universitat Politècnica de Catalunya. GRIC - Grup de Recerca i Innovació de la Construcció |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
N2O emissions
Environmental Engineering 010504 meteorology & atmospheric sciences Population Desenvolupament humà i sostenible::Enginyeria ambiental::Tractament de l'aigua [Àrees temàtiques de la UPC] Wastewater treatment 010501 environmental sciences 01 natural sciences Greenhouse gas Empirical research Mexico city Per capita Environmental Chemistry education Waste Management and Disposal Sewage disposal plants--Environmental aspects 0105 earth and related environmental sciences education.field_of_study Nitrous oxide Global warming Aigües residuals -- Plantes de tractament -- Aspectes ambientals Environmental engineering Pollution Tier 1 network Wastewater Environmental science Sewage treatment Desenvolupament humà i sostenible::Degradació ambiental::Contaminació atmosfèrica [Àrees temàtiques de la UPC] |
| Zdroj: | UPCommons. Portal del coneixement obert de la UPC Universitat Politècnica de Catalunya (UPC) |
| Popis: | Wastewater is a source of N2O emission that is generated, both directly from advanced treatment plants and indirectly from the discharge of wastewater into the natural environment, due to its remaining nitrogen content. There are a variety of methods based on different parameters used to calculate N2O emission in wastewater treatment plants. The methodology proposed by the IPCC is used as an international reference for national inventories. In this work, we use five international methodologies to calculate the N2O emission of the WWTPs in two areas with high population density: The Metropolitan Area of Barcelona (MAB) and Mexico City (MXC). The MAB has 100% population served and has advanced treatment plants (five WWTP) and traditional wastewater treatment plants (two WWTP), the MXC served 14% of its population and had advanced treatment plants (six WWTP) and traditional plants (nineteen WWTP) in 2016. The results obtained show that the IPCC and Das methodologies underestimate the emission of N2O by considering the per capita consumption of proteins as a constant nitrogen value and also by the suggested emission factors. The methodologies that use the operational data of each plant provide emission results closer to those found in the literature. The value of TN should be the parameter to be considered for a correct estimate of the N2O emission in the WWTPs. The emission factors currently used are very low, with a low level of confidence of up to 1.3%. The range currently used should be increased and have a minimum range of 0.03 kg N2O-N/kg N. The emission factors reported in the literature are very variable and with very high levels of uncertainty, and therefore underestimate the emission of N2O in WWTPs. More research should be done to obtain higher and more reliable emission factors than those currently used. Monserrat G. Ramírez Melgarejo thanks CONACYT for the PhD scholarship. This work was supported by the operation data of the Water System of Mexico City (SACMEX) and the Technical Area of Sanitation and Inspection of the MAB. |
| Databáze: | OpenAIRE |
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