Energy use and decarbonisation of the water sector: a comprehensive review of issues, approaches, and technological options

Environmental Technology Reviews, Год журнала: 2025, Номер 14(1), С. 40 - 68

Опубликована: Янв. 6, 2025

Water and wastewater infrastructure is a major energy consumer an important source of global greenhouse gas emissions: on average, 10.6 kg CO2/m3 water consumed. The European Environment Agency in 2019 estimated these emissions from treatment operations Europe alone at over 25 MtCO2eq. Increased demand (in terms volumes quality) the sector raises expectations future increases if appropriate measures will not be undertaken. Many companies utilities associations have been or are developing plans to achieve net zero industry-wide basis by 2050, some cut 50% last ten years. About half energy-related facilities could significantly abated applying existing technologies, close 95% this objective achieved negative cost with proper innovation strategies. This paper examines discusses issues, possibilities, technologies that considered planning reduction WW-related GHG holistic view entire sector, based recent literature review.

Язык: Английский

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Quantifying, predicting, and mitigating nitrous oxide emissions in a full-scale partial nitritation/anammox reactor treating reject water.

Water Research, Год журнала: 2025, Номер unknown, С. 123200 - 123200

Опубликована: Янв. 1, 2025

Язык: Английский

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DYNAMICALLY PREDICTING NITROUS OXIDE EMISSIONS IN A FULL-SCALE INDUSTRIAL ACTIVATED SLUDGE REACTOR UNDER MULTIPLE AERATION PATTERNS AND COD/N RATIOS

Water Research, Год журнала: 2025, Номер unknown, С. 123379 - 123379

Опубликована: Фев. 1, 2025

Язык: Английский

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A critical review of chemical uses in urban sewer systems

Water Research, Год журнала: 2023, Номер 240, С. 120108 - 120108

Опубликована: Май 21, 2023

Chemical dosing is the most used strategy for sulfide and methane abatement in urban sewer systems. Although conventional physicochemical methods, such as oxidation (e.g., oxygen/nitrate), precipitation iron salts), pH elevation magnesium hydroxide/sodium hydroxide) have been since last century, high chemical cost, large environmental footprint, side-effects on downstream treatment processes demand a sustainable cost-effective alternative to these approaches. In this paper, we aimed review currently chemicals significant progress made technology, including 1) use of bio-inhibitors, 2) situ production, 3) an effective strategy. To enhance cost-effectiveness applications systems, two research directions emerged: online control optimization strategies integrated wastewater The integration approaches offers considerable system-wide benefits; however, further development comprehensive studies are required.

Язык: Английский

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Artificial intelligence underpins urban water infrastructure of the future: A holistic perspective

Cambridge Prisms Water, Год журнала: 2023, Номер 1

Опубликована: Янв. 1, 2023

Abstract The potential of artificial intelligence (AI) in water management is widely recognised by research and practice communities alike, with an increasing number applications showed tackling supply, stormwater wastewater challenges. However, there a critical knowledge gap understanding the fundamental role AI development urban infrastructure (UWI). This review aimed to provide analysis how could be aligned support future UWI systems. Four types analytics – descriptive, diagnostic, predictive prescriptive are discussed linked improvement performance systems from three categories: reliability, resilience sustainability. It envisioned that technology will play pivotal transitioning through underpinning five pathways: decentralisation, circular economy, greening, decarbonisation automation. barriers improving adoption real world also highlighted four dimensions: cyber-physical infrastructure, institutional governance, social-economic technological wider society. Embedding pathways can ensure AI-empowered deployed equitable responsible way improve sustainability

Язык: Английский

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Techno-environmental and economic assessment of color removal strategies from textile wastewater

The Science of The Total Environment, Год журнала: 2024, Номер 913, С. 169721 - 169721

Опубликована: Янв. 1, 2024

The textile industry is one of the most chemical-intensive processes, resulting in unquestionable pollution more than a quarter planet's water bodies. high recalcitrant properties some these pollutants resulted on development treatment technologies looking at larger removal efficiencies, due to conventional systems are not able completely remove them their effluents. However, safeguarding environment also implies taking into account indirect from use chemicals and energy during treatment. On other hand, emerged need be economically attractive for investors managers. Therefore, costs should kept under control. For this reason, present study focuses comparative Life Cycle Assessment Costing four scale-up scenarios aiming mono di-azo reactive dyes wastewater. Two reactors (sequencing batch reactor two-phase partitioning) were compared different reaction environments (i.e., single anaerobic sequential anaerobic-aerobic) conditions (different pH, organic loading rates polymer). In accordance with results each scenario, it was found that three technical parameters leading change environmental profiles efficiency dyes, type dye eliminated, pollutant influent concentration. limitation increasing related biomass inhibition could overcame through novel two-phased partitioning bioreactor. polymer system may help restore performance (84.5 %), reducing toxic effects effluents consequently decreasing impact. terms impact, reduction surface marine waters homologous anaerobic-aerobic sequencing reactor. benefits achieved nature comes an economic burden consumption polymer. It expected cost investment bioreactor rises 0.6–8.3 %, depending market prices, analyzed technologies. side, chemical did prove limiting factors feasibility.

Язык: Английский

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Fostering a Whole-Institution Approach to Sustainability through Systems Thinking: An Analysis of the State-of-the-Art in Sustainability Integration in Higher Education Institutions

Sustainability, Год журнала: 2024, Номер 16(6), С. 2508 - 2508

Опубликована: Март 18, 2024

Policy initiatives from the United Nations and EU institutions have emphasized need for higher education (HEIs) to fulfil a significant role in green transitioning. However, they tend fall short of achievement this objective. Multiple studies indicate that HEIs assign high importance integration environmental sustainability on strategic level but generally lack dedicated policies operational aspects. This paper’s research aim is provide meta-study reviews, analyzes, assesses state art HEI sustainability. The paper also contributes state-of-the-art by mapping institutional self-assessment models, tools, guidelines four prominent areas: (1) educational activities, pedagogical perspectives, systemic transformations; (2) benchmarking organizational transformation optimization, links between developmental priorities settings; (3) whole-system approaches focusing design implementation whole-institution plans; (4) culture operations. final contribution presentation best practices emerging trends literature. These were selected following qualitative methodological criteria based systems-thinking approach assessment: effectiveness each respective area; degree systems thinking and/or modeling; incorporation indicators stakeholder engagement.

Язык: Английский

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Modeling nitrous oxide emission from full-scale hybrid membrane aerated biofilm reactors (MABR)

Water Research, Год журнала: 2025, Номер 274, С. 123128 - 123128

Опубликована: Янв. 10, 2025

Current published models for nitrous oxide (N2O) emission in membrane aerated biofilm reactors (MABR) have several simplifications that are not representative of full-scale systems. This study developed an improved MABR N2O model captured commonly overlooked phenomena such as back diffusion generated into lumen gas and the recirculation laden tank mixing thickness control. The was validated with measured concentrations phase bulk mixed liquor a hybrid facility. used to obtain insights bioconversion pathways. Model predictions revealed inner layers were hotspots generation via ammonium oxidizing organism activity. transported outer reduced heterotrophic denitrification pathway. predicted up 70 % carried by recirculated scrubbed which further denitrified. An ratio 0.18 ± 0.01 N2ON/N load estimated process achieved 50 removal influent N load, highlighting potential this technology mitigate emissions when compared conventional activated sludge.

Язык: Английский

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Greenhouse gas emission dynamics and trajectories in urban water supply and wastewater systems

Water Research, Год журнала: 2025, Номер 275, С. 123153 - 123153

Опубликована: Янв. 17, 2025

Язык: Английский

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The hybrid MABR process achieves intensified nitrogen removal while N2O emissions remain low

Water Research, Год журнала: 2023, Номер 244, С. 120458 - 120458

Опубликована: Авг. 7, 2023

Язык: Английский

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