Life cycle assessment and economic efficiency analysis of integrated management of wastewater treatment plants

Piao, Wenhua; Kim, Ye-Jin; Kim, Hyo–Soo; Kim, Min‐Soo; Kim, Changwon

doi:10.1016/j.jclepro.2015.11.012

Cited by 114 publications

(49 citation statements)

References 13 publications

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“…The direct GHG emission from a studied WWTP can contribute 75% to GWP with 53% from N 2 O and 22% from CH 4 according to the average site-specific emission factor from the Korea Environmental Corporation Report 2008 . With 1 m 3 treated water as FU, the emission of N 2 O and CH 4 from Piao et al (2016) is 3.5 and 5.5 times higher, respectively, than those in this study calculated based on IPCC guideline. The higher percentage of direct emission poses a great challenge to reduce GWP in WWTPs because currently there are still no widely accepted strategies, which can mitigate CH 4 and N 2 O emissions effectively from wastewater treatment processes.…”

Section: Detailed Comparison Of Ep and Gwp Categories Between Fu1 Andcontrasting

confidence: 66%

“…This result suggests that FU2 reflects more effort made by the plant for pollutant/nutrients removal instead of the actual effluent emission only as FU1 does. The result from Piao and Kim (2016) also highlighted that their WWTP B using A2/O process with higher nutrient removal rate had a 30% lower EP impact compared to WWTP A with conventional activated sludge when using FU of 1 kg TN removed. The big difference of EP in dry and wet seasons in MSTP also suggests that nutrient removal in the dry season is more important than wet season to reduce EP.…”

Section: Detailed Comparison Of Ep and Gwp Categories Between Fu1 Andmentioning

confidence: 96%

“…It can be seen that, the selection of appropriate functional unit is prominent as the total treated water discharge volume to the environment is more in the wet season than the dry season, leading to the possible higher total pollutant mass load to the environment. It is noteworthy that although FU1 has been widely used for seasonal LCA assessment of WWTP Lorenzo-Toja et al 2016;Li et al 2017;Risch et al 2018), effects from the variation of influent compositions and flow could not be reflected very well if only using per unit volume as a functional unit (Rodriguez-Garcia et al 2011;Piao et al 2016). The functional unit as per kgPO 4 3 -eq removed based on eutrophying substances removal (e.g.…”

Section: Environmental Impact Of Two Wwtps In Wet and Dry Seasons Usimentioning

confidence: 99%

“…Rodriguez-Garcia et al (2014) also reported the higher percentage of direct emission to GWP with N-removal technology when using FU2, proving that direct emission could be dominant in the GWP impact category of WWTP. Nowadays, more on-site measurement of CH 4 and N 2 O emission (Masuda et al 2015;Schaubroeck et al 2015;Piao et al 2016) indicates that the direct emission of CH 4 and N 2 O based on IPCC guidelines is underestimated. The direct GHG emission from a studied WWTP can contribute 75% to GWP with 53% from N 2 O and 22% from CH 4 according to the average site-specific emission factor from the Korea Environmental Corporation Report 2008 .…”

Section: Detailed Comparison Of Ep and Gwp Categories Between Fu1 Andmentioning

confidence: 99%

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Assessing environmental impacts of large centralized wastewater treatment plants with combined or separate sewer systems in dry/wet seasons by using LCA

Rashid

Liu

2020

Environ Sci Pollut Res

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Rainfall can affect influent flow rate and compositions of wastewater, and thus further affect wastewater treatment performance and the effluent quality. This study aims to study the influence of rainfall on the environmental impacts of centralized wastewater treatment plants. The correlations between rainfall, and influent flow rate and compositions of wastewater in wet and dry seasons with two sewer systems, i.e. combined and separate sewer systems, were primarily established. Environmental impacts were assessed with life cycle assessment (LCA) to understand the temporal environmental burdens in wet and dry seasons. Functional units as per m 3 treated wastewater (FU1) and as per kg PO 4 3 -eq. removed (FU2), respectively, were used to evaluate impacts of wastewater treatment to the environment. Strong correlation between rainfall and the influent flow rate was found in the wastewater treatment plants with either a combined sewer system (with Pearson correlation coefficient r at 0.66) or a separate sewer system (with r at 0.84), where r represents the strength of the association between two variables. The rainfall effect is more obvious on the eutrophication potential and global warming potential than on other environmental indicators while sewer system, i.e. combined or separate, seems not important in the two cases studied. Both wastewater treatment plants (WWTPs) show a lower environmental burden in the wet season than in the dry season partially due to the dilution of wastewater by using FU1. The WWTP receiving high strength wastewater, however, demonstrates higher environmental impacts in the wet season by using FU2 than FU1, due to the less efficient treatment caused by heavy rainfall. Meanwhile, it is found that environmental impacts from the WWTP receiving low strength wastewater have no difference when using either FU1 or FU2. The results indicate that the environmental burdens particularly eutrophication and global warming caused by WWTPs are dependent on the correlations of rainfall intensity with wastewater quantity and quality instead of combined or separate sewer system. This could be used to guide a stricter control of eutrophication in a more sensitive season in more vulnerable receiving waters.

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Section: Detailed Comparison Of Ep and Gwp Categories Between Fu1 Andcontrasting

confidence: 66%

Section: Detailed Comparison Of Ep and Gwp Categories Between Fu1 Andmentioning

confidence: 96%

Section: Environmental Impact Of Two Wwtps In Wet and Dry Seasons Usimentioning

confidence: 99%

Section: Detailed Comparison Of Ep and Gwp Categories Between Fu1 Andmentioning

confidence: 99%

See 2 more Smart Citations

Assessing environmental impacts of large centralized wastewater treatment plants with combined or separate sewer systems in dry/wet seasons by using LCA

Rashid

Liu

2020

Environ Sci Pollut Res

View full text Add to dashboard Cite

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“…Este consumo está directamente vinculado a la consecución de los requisitos de calidad del agua del efluente. Piao et al (2016) proponen un protocolo para minimizar los impactos ambientales y optimizar el consumo de energía eléctrica, en las condiciones necesarias para cumplir con los estándares de calidad del agua efluente en una EDAR de Corea. Bazin et al (2017) han empleado recientemente las técnicas de ACP para analizar la toxicidad de muestras de aguas residuales depuradas, con el objetivo de establecer un bioensayo rápido que les permita monitorizar esta calidad.…”

Section: Técnicas Quimiométricas En La Gestión De Aguas Residualesunclassified

Tools for optimization in the efficiency of exploitation of urban waste: Application of techniques quimiometrics for depuration data hydrocyclone for the cleaning of anaerobic digestors

García¹

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The control of the processes and the operation of wastewater treatment plants (WWTP) are carried out to ensure compliance with the legislative requirements imposed by the European Union. Because a large number of variables are daily measured, a coherent and structured approach to such a system is required to understand its inherent behaviour and performance efficiency. For this purpose, the physicochemical parameters are widely used as a reliable evaluation procedure that allows us to check the quality of the tributary and effluent to the plant. However, due to the large amount of data available on a daily basis, the great variability of the processes that occur in the WWTP and seasonal variations, it is difficult to evaluate the overall performance with univariate simple statistical methods. In this sense, both principal component analysis (PCA) and hierarchical clusters analysis (HCA) are multivariate techniques that have been extensively applied to extract and structure information for different purposes. In this PhD, both statistical tools are applied to the dataset over a three-year period of an urban WWTP located in Cartagena (Southeast of Spain), an area with special characteristics related to the geochemical composition of the water and an important use of fertilizers. Four main factors were extracted in association with the nutrients, the ionic component, the organic load of the WWTP and the efficiency of the whole process. The analysis of hierarchical groupings (HCA) allowed us to distinguish between influent and effluent parameters, although a deeper analysis gave rise to a dendrogram with groupings similar to those obtained for the analysis of main components. Resumen -AbstractJoaquín López-Castellanos García IV On the other hand, the optimization of the exploitation efficiency of an urban WWTP requires a correct management of its sludge, maximizing the time of use of its anaerobic digesters, among other factors. In this sense, this PhD presents the use of the hydrocyclone technique in the sludge line, recovering the useful capacity of the anaerobic digester after years of continuous operation and as an alternative to emptying it for maintenance and cleaning. The coarse fraction recovered prior the use of the hydrocyclone plant was observed to contain still potentially biodegradable matter, which could be used as soil amendment, with low concentrations of heavy metals. The hydrocyclone system showed a separation capacity over time for all types of solids, with higher concentration factors for fixed solids than for total or volatile solids, always being higher in the warmer seasons. X-ray diffraction analysis showed the presence of quartz in the fines fraction, which indicated its possible use as a building material or ceramic. In addition, it was observed that the formation of struvite increased with the increase of phosphorus and magnesium in the different fractions, as well as a concentration in the levels of chromium in the whole process with respect to the influent to the hydrocyclone, although...

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The P‐graph approach for systematic synthesis of wastewater treatment networks

et al. 2021

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Wastewater treatment consists of three or four sequential stages: preliminary, primary, secondary, and tertiary. Each stage can comprise multiple alternative technologies that can perform the same tasks with different efficiencies, operating times, and costs. Thus, we propose a systematic approach for designing wastewater treatment networks by utilizing principles of mathematical modeling and generating an exhaustive enumeration of all the possible technologies and their connections during the early stages of designing a treatment facility. Some of these structures are nonintuitive and include recycling, reprocessing, bypasses, and multiple technologies in parallel or series to remove the same contaminant. The nonintuitive structures with multiple technologies may provide a measure of resilience compared to typical heuristic designs. Thus, the combination of P‐graph methodology and the sequence of treatment technologies predicted via the optimization algorithm from the maximal structure is based on holistic considerations and does not lead to suboptimal solutions.

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Life cycle assessment and economic efficiency analysis of integrated management of wastewater treatment plants

Cited by 114 publications

References 13 publications

Assessing environmental impacts of large centralized wastewater treatment plants with combined or separate sewer systems in dry/wet seasons by using LCA

Assessing environmental impacts of large centralized wastewater treatment plants with combined or separate sewer systems in dry/wet seasons by using LCA

Tools for optimization in the efficiency of exploitation of urban waste: Application of techniques quimiometrics for depuration data hydrocyclone for the cleaning of anaerobic digestors

The P‐graph approach for systematic synthesis of wastewater treatment networks

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