Minimizing greenhouse gases emissions and energy consumption from wastewater treatment plants via rational design and engineering strategies: A case study in Mashhad, Iran

Aghabalaei, Vahid; Nayeb, Hossein; Mardani, Shima; Tabeshnia, Mahla; Baghdadi, Majid

doi:10.1016/j.egyr.2023.01.017

Cited by 14 publications

(1 citation statement)

References 36 publications

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“…Several authors discuss the above impact categories, assessing what the emissions are for each category, excluding odors, noise, radiation, accidents, and ecotoxicity [21,22]. Further studies have found that energy consumption is one of the most impactful factors within sewage treatment plants [23][24][25][26]. Furthermore, some literature studies [11,14,[27][28][29][30] analyze, starting from impact categories, different environmental effects at different stages of construction, operation, and demolition; 4.…”

Section: Methodsmentioning

confidence: 99%

Life Cycle Assessment Methodology Applied to a Wastewater Treatment Plant

Viotti,

Tatti,

Bongirolami

et al. 2024

Water

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Wastewater treatment plants are highly energy-intensive systems. This research uses Life Cycle Assessment (LCA) to determine the impacts generated during the operation of a wastewater treatment plant. Three different scenarios are analyzed: a baseline scenario that considers a conventional activated sludge treatment technology exploiting data from an existing plant located in central Italy, a second scenario that involves the implementation of MBR technology applied to the baseline scenario, and finally a third scenario that consists of the addition of an anaerobic digester that allows energy recovery from biogas production, followed by a photovoltaic plant capable of supplying the plant energy demand. Global warming potential, eutrophication, and acidification are the environmental categories considered most relevant to emissions. The results showed that the effluent had the highest impact in terms of CO2 equivalent in all three situations due to the presence of N2O. Since emissions from biological processes, transportation, and wastewater are almost similar in all three scenarios, it is preferable to focus on the environmental impacts associated with energy consumption. The third scenario involves careful resource management and the use of treatment technologies that allow for a reduction in the use of nonrenewable energy sources in favor of renewable ones.

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