Controlling Factors of Nitrous Oxide Emissions From a Conventional Activated Sludge Wastewater Treatment Plant

Ribeiro, Ricardo; Oliveira, Jaime Lopes da Mota; Kligerman, Débora Cynamon; Alvim, Renata Barbosa; Andrade, Samara A.; Almeida, Paulo A. de; Mello, William Zamboni de

doi:10.22409/engevista.v17i3.698

Cited by 3 publications

(1 citation statement)

References 25 publications

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“…A modified upturned funnel was used as the gas sampling technique (on a lab-scale). This same technique has been applied by our group in full-scale WWTP studies (Mello et al, 2013;Ribeiro et al, 2015;Brotto et al, 2015). The N2O emission rate (ER) for the reactor was calculated by multiplying the ΔN2O concentration, which is the difference between the upturned funnel headspace and the atmospheric N2O concentrations, by the emerging airflow rate (Qair), as displayed in Equation (1).…”

Section: Sampling and Analytical Proceduresmentioning

confidence: 99%

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2018

Rev. ambiente água

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Section: Sampling and Analytical Proceduresmentioning

confidence: 99%

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2018

Rev. ambiente água

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The response of nitrous oxide emissions to different operating conditions in activated sludge wastewater treatment plants in Southeastern Brazil

Ribeiro

Bueno

Piveli

et al. 2017

Water Science and Technology

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The continuous measurements of NO emissions from the aeration tanks of three activated sludge wastewater treatment plants (WWTPs) operated with biological nitrogen removal (BNR) and non-BNR were performed during the different operating conditions of several parameters, such as aeration, dissolved oxygen (DO) profiling and organic shock loading (with landfill leachate). The nitrification process is the main driving force behind NO emission peaks. There are indications that the variation of the air flow rate influenced NO emissions; high NO emissions denote over-aeration conditions or incomplete nitrification, with accumulation of NO concentrations. Thus, continuous measurements of NO emissions can provide information on aeration adequacy and the efficiency of complete nitrification, with major focus on DO control, in order to reduce NO emissions. An additional concern is the observed propensity of WWTPs in developing countries to receive landfill leachates in their wastewater systems. This practice could have adverse effects on climate change, since wastewater treatment during periods of organic shock loading emitted significantly higher amounts of NO than without organic shock loading. In short, non-BNR WWTPs are subject to high NO emissions, in contrast to BNR WWTP with controlled nitrification and denitrification processes.

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Estimación de los gases efecto invernadero generados por las plantas de tratamiento de aguas residuales ubicadas en la cuenca del río Bogotá

Montenegro¹,

Posada²,

Alfaro³

et al. 2019

Rev. ing. univ. Medellín

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El presente estudio contiene un análisis de datos que relaciona la carga orgánica presente en las plantas de tratamiento de aguas residuales (PTAR) de la cuenca del río Bogotá y su incidencia en la generación de gases efecto invernadero (GEI) durante el proceso de depuración. Dentro del análisis se recopiló una serie de consideraciones técnicas relacionadas con la generación de GEI de las diferentes PTAR que hacen parte de la cuenca. De acuerdo con las características del sistema empleado en el tratamiento de las aguas residuales, se determina cuál proceso genera mayor aporte de emisiones, teniendo en cuenta el estado actual de cada planta. Para ello, se emplea la metodología nivel 1 del Grupo Intergubernamental de Expertos sobre el Cambio Climático (IPCC) para los inventarios de GEI. Con base en los resultados obtenidos, se identifica cuáles sistemas de tratamiento empleados en las PTAR inciden en mayor proporción en la emisión de GEI.

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Controlling Factors of Nitrous Oxide Emissions From a Conventional Activated Sludge Wastewater Treatment Plant

Abstract: Nitrous oxide emissions were determined in three campaigns in the aeration tank of a full scale conventional activated sludge wastewater treatment plant. During these experiments, the carbonaceous organic matter (BOD and COD) removal was high and rather constant (

Cited by 3 publications

References 25 publications

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The response of nitrous oxide emissions to different operating conditions in activated sludge wastewater treatment plants in Southeastern Brazil

Estimación de los gases efecto invernadero generados por las plantas de tratamiento de aguas residuales ubicadas en la cuenca del río Bogotá

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