Methane and nitrous oxide emissions from municipal wastewater treatment – results from a long-term study

Daelman, Matthijs R.J.; Voorthuizen, E.M. van; Dongen, L. G. J. M. van; Volcke, Eveline; Loosdrecht, M.C.M. van

doi:10.2166/wst.2013.109

Cited by 216 publications

(120 citation statements)

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“…Furthermore, other parameters such as temperature, pH, and even the copper concentration in the wastewater are found to have a considerable effect on the N 2 O production [8,15,[18][19][20]. Recent findings show a seasonal dynamic of N 2 O emissions, which is not yet fully understood [21]. A comprehensive review of literature, published in 2011, on parameters affecting N 2 O emissions from WWT facilities is presented in [22].…”

Section: Introductionmentioning

confidence: 99%

Implementation of Extended Statistical Entropy Analysis to the Effluent Quality Index of the Benchmarking Simulation Model No. 2

Sobańtka

Pons

Zessner

et al. 2014

Water

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Abstract:Extended statistical entropy analysis (eSEA) is used to assess the nitrogen (N) removal performance of the wastewater treatment (WWT) simulation software, the Benchmarking Simulation Model No. 2 (BSM No. 2 ). Six simulations with three different types of wastewater are carried out, which vary in the dissolved oxygen concentration (O 2,diss. ) during the aerobic treatment. N 2 O emissions generated during denitrification are included in the model. The N-removal performance is expressed as reduction in statistical entropy, ΔH, compared to the hypothetical reference situation of direct discharge of the wastewater into the river. The parameters chemical and biological oxygen demand (COD, BOD) and suspended solids (SS) are analogously expressed in terms of reduction of COD, BOD, and SS, compared to a direct discharge of the wastewater to the river (ΔEQ rest ). The cleaning performance is expressed as ΔEQ new , the weighted average of ΔH and ΔEQ rest . The results show that ΔEQ new is a more comprehensive indicator of the cleaning performance because, in contrast to the traditional effluent quality index (EQ), it considers the characteristics of the wastewater, includes all N-compounds and their distribution in the

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Section: Introductionmentioning

confidence: 99%

Implementation of Extended Statistical Entropy Analysis to the Effluent Quality Index of the Benchmarking Simulation Model No. 2

Sobańtka

Pons

Zessner

et al. 2014

Water

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“…These problems are solved in most of cases by objects encapsulation and directing of the smelling gases through proper filters, eg biofilters. Since a short time it is taken into consideration emission of greenhouse gases from WWTP [25,26], and the possibility to valuate wastewater treatment process or quality of treated sewage basing on gaseous substances emitted from wastewater [27,28].…”

mentioning

confidence: 99%

Changes of Isotopic Composition in Gases Emitted from Wastewater Treatment Plant - Preliminary Study

Stelmach

Szarlip

Trembàczowski

2014

Ecological Chemistry and Engineering S

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Abstract:Investigations of processes occurring during wastewater treatment have progressed beyond the stage of technology. Currently, great numbers of representatives of diverse specialist research apply increasingly sophisticated measurement methods that have not been employed in this field of science. One of the methods is IRMS (Isotope Ratio Mass Spectrometry). Tracking changes in the ratios of biogenic element isotopes is useful in eg identification and monitoring of investigated processes. Since the IRMS technique has hardly been used for investigations of the wastewater treatment process, pilot research should be instigated to determine the isotope ratios occurring naturally in the process. The aim of the study was to determine changes in carbon and nitrogen isotope ratios at the successive stages of the technological line in wastewater treatment plants. The study material comprised: i) suspensions of raw sewage and mixtures of wastewater and activated sludge; ii) gases sampled from the volume of the suspensions; iii) gases sampled from the air above the suspension surface. The research material originated from the facilities of "Hajdow" municipal wastewater treatment plant in Lublin (SE Poland). The samples were analysed for the carbon and nitrogen isotope ratios, and the concentrations of the gases as well as total organic carbon (TOC), inorganic carbon (IC), Kjeldahl nitrogen (KN), dry weight, pH, and Eh were determined. The results obtained suggest that: i) the IRMS technique can be successfully applied in investigations of processes occurring during wastewater treatment; ii) isotope ratios in the carbon and nitrogen compounds (CO2 and N2) both in the suspensions and gases contained therein and in the air above them differ from each other and change at the different stages of the treatment process; iii) further research is indispensable in order to identify processes responsible for fractionation of carbon and nitrogen isotopes.Keywords: IRMS, stable isotopes, wastewater, activated sludge, gas emission Investigations of processes occurring during wastewater treatment have progressed beyond the stage of technology. The importance of development of new measurement methods or adjustment of existing techniques has been increasingly emphasised [1,2]. Hence, investigations have been conducted to determine the broad range of wastewater and sludge properties, eg the composition of biological communities identified in

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“…This has exposed the inadequacies of conventional N2O accounting methodologies. For example, a number of studies have estimated N2O emission levels an order of magnitude higher than would be calculated using the default methodology proposed by the IPCC (see Daelman et al 2013b, Kampschreur et al 2009). In the Australian context, the mandated approach (DCCEE 2011) and recent literature , Foley et al 2010b) relate N2O flux to the level of denitrification that is achieved, reflecting the historical perception that the denitrification pathway was the main source of N2O from STPs.…”

Section: Direct Emission Of N 2 O -Sewage Treatment Plantsmentioning

confidence: 99%

“…Given this, the estimate for this study was based on recent data collected across a large number of sites, rather than extracting information from any one particular example. Overall estimates were considered for 30 full scale, urban STPs, covering a range of process configurations and conditions , Daelman et al 2013b, Foley et al 2010b, GWRC 2011, Joss et al 2009, Kampschreur et al 2008, Ni et al 2013, Sun et al 2013, Ye et al 2014. The average (15.5 g-N2O/kg-TN in the influent) of those 30 flux estimates is double the median value (7.5 g-N2O/kg-TN in the influent), illustrating the importance of recognising and understanding the variation in the published data.…”

Section: Direct Emission Of N 2 O -Sewage Treatment Plantsmentioning

confidence: 99%

Life-cycle perspectives for urban water systems planning

Lane¹

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Urban water systems around the world are going through a period of substantial change: they are evolving towards more complex water supply alternatives; are being placed under increasing pressure to achieve higher quality effluent and biosolids discharges; and are being confronted with a growing number of broader environmental management challenges. This thesis explored the use of the Life Cycle Assessment (LCA) methodology for assisting in that process of change, because of LCA's strengths in combining practicality and flexibility with 'big picture' thinking. The overarching goals were to: (1) explore LCA principles that do or do not provide useful perspectives for urban water planners, and (2) identify situations where the benefits from life-cycle thinking will be impeded by gaps in data and modelling approaches.The analytical starting point was a comparison of two different configurations for a city-scale, integrated water supply and wastewater system: a 'traditional' approach dependent on lowenergy dam-sourced mains water supply; and one with a more complex mix of contemporary water supply infrastructure intended to reduce the intensity of freshwater extraction and nutrient discharge. This change incurs a substantial increase in energy use, meaning the reduced pressure on local aquatic ecosystems may come at the expense of large increases in other life-cycle impacts. Notably however, the results generated in this thesis indicate that an exclusive focus on energy use is unlikely to be a robust approach to factoring these bigger picture environmental impacts into water industry decision making. Furthermore, it is the wastewater components of the system, rather than the water supply components, that make the largest contribution to most of the life-cycle impacts. An excessive focus on the energy or greenhouse gas (GHG) implications of growing urban water demands is, therefore, unlikely to chart the industry on an optimal course to a more environmentally benign system configuration.The estimates for direct (scope 1) greenhouse gas emissions in this thesis utilise a comprehensive set of locally relevant empirical data and expert knowledge. Based on that, direct emissions could comprise 20% or more of the overall GHG footprint for urban water infrastructure systems. The substantial spatial variability associated with all the largest direct emission sources should be an important consideration in the urban water decision making process. For assessing the option to dispose of sewage treatment plant (STP) biosolids onto farmlands, the uncertainty associated with estimating field fluxes of carbon and nitrogen is likely to be more important than the more traditional focus on biosolids transport energy.The second major case study considered in this thesis is focussed on the issue of biosolids reuse for agricultural purposes. When that practice is assessed against a broader set of impact categories than just energy use or GHG emissions, it becomes apparent that conventional life-cycle impact assessment (LCIA) mod...

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Methane and nitrous oxide emissions from municipal wastewater treatment – results from a long-term study

Cited by 216 publications

References 11 publications

Implementation of Extended Statistical Entropy Analysis to the Effluent Quality Index of the Benchmarking Simulation Model No. 2

Implementation of Extended Statistical Entropy Analysis to the Effluent Quality Index of the Benchmarking Simulation Model No. 2

Changes of Isotopic Composition in Gases Emitted from Wastewater Treatment Plant - Preliminary Study

Life-cycle perspectives for urban water systems planning

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