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Sorption-enhanced steam gasification of fine coal waste for fuel producing

Journal of King Saud University - engineering Sciences 2024年第2期36卷 81-88页

作者： Aprianti, Nabila Faizal, Muhammad Said, Muhammad Nasir, Subriyer Doctoral Program of Environmental Science Graduate School Universitas Sriwijaya South Sumatra Palembang30139 Indonesia Chemical Engineering Department Faculty of Engineering Universitas Sriwijaya South Sumatra Ogan Ilir30662 Indonesia

Improving the quality of syngas from fine coal waste using the sorption-enhanced gasification process is a novel technology in the production of H2. The effect of CaO on CO2 absorption and H2 increase in the steam fine coal gasification process was determined in a fixed bed gasifier. The steam gasification process took place at 650 °C using bentonite and CaO as catalysts and absorbents. Steam increased the H2 concentration in the syngas to 58 vol%. In-situ CO2 absorption is more effective with the addition of CaO. The maximum percentage of CO2 was absorbed when the Ca/C ratio 2 was 78.33 %. The H2 content in the syngas after the CO2 was absorbed increased rapidly to 75.80 vol% at a Ca-to-carbon-mole ratio (Ca/C) of 1.5 and a steam-to-feedstock ratio (S/F) of 1.5. CaO did not produce significant results for low heating value (LHV) or cold gas efficiency (CGE), with results of 12 MJ/Nm3 and 44.53 %. The dominant water gas shift reaction due to the influence of steam and CaO increased H2/CO up to 9.11, which made the syngas from this work suitable for Fischer–Tropsch synthesis. © 2022 The Authors

关键词： Carbon dioxide

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Drinking Water Systems: A Comprehensive Analysis of Public Water Systems, Including Treatment and Distribution Classifications, Operator Licensing, and Future Demands. Massachusetts as a Case Study

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Journal of the New England Water Works Association 2024年第2期138卷 35-49页

作者： Perez-Medina, Xochitl Celona, Michael Durham, Andrew Guterman, Damon Finn, A. Margaret Ronca, Grace DePeiza, Yvette Massachusetts Department of Environmental Protection Drinking Water Program 100 Cambridge Street BostonMA02114 United States UMass Amherst-Department of Civil and Environmental Engineering 100 Cambridge Street BostonMA02114 United States

Massachusetts is supported by an extensive network of more than 1,400 water treatment plants, 1,600 Public Water Systems (PWS), and 3,218 licensed individuals. This analysis examines the current classifications of PWS, the state of operator licensing, and the impact of PFAS standards. Findings include that new operators are entering the workforce but are only replacing those leaving and that current PFAS regulations have increased the need for lower-grade operators. Efforts should be made to increase the number of operators and to assist PWS potentially impacted by PFAS regulations. © 2024 New England Water Works Association. All rights reserved.

关键词： Potable water

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Greywater reuse as a key enabler for improving urban wastewater management

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environmental Science and Ecotechnology 2023年第4期16卷 52-64页

作者： Arjen Van de Walle Minseok Kim Md Kawser Alam Xiaofei Wang Di Wu Smruti Ranjan Dash Korneel Rabaey Jeonghwan Kim Center for Microbial Ecology and Technology Ghent University9052GhentBelgium Department of Environmental Engineering Program of Environmental and Polymeric EngineeringInha University22212IncheonRepublic of Korea Center for Environmental and Energy Research Ghent University Global Campus119-5IncheonRepublic of Korea

Sustainable water management is essential to guaranteeing access to safe water and addressing the challenges posed by climate change,urbanization,and population *** a typical household,greywater,which includes everything but toilet waste,constitutes 50e80%of daily wastewater generation and is characterized by low organic strength and high *** can be an issue for large urban wastewater treatment plants designed for high-strength *** of greywater at the source for decentralized wastewater treatment is therefore necessary for its proper management using separate treatment *** reuse may thus lead to increased resilience and adaptability of local water systems,reduction in transport costs,and achievement of fit-for-purpose *** covering greywater characteristics,we present an overview of existing and upcoming technologies for greywater *** treatment technologies,such as nature-based technologies,biofilm technologies,and membrane bioreactors(MBR),conjugate with physicochemical treatment methods,such as membrane filtration,sorption and ion exchange technologies,and ultraviolet(UV)disinfection,may be able to produce treated water within the allowable parameters for *** also provide a novel way to tackle challenges like the demographic variance of greywater quality,lack of a legal framework for greywater management,monitoring and control systems,and the consumer perspective on greywater ***,benefits,such as the potential water and energy savings and sustainable future of greywater reuse in an urban context,are discussed.

关键词： Greywater reuse Urban wastewater Decentralized wastewater treatment Sustainable wastewater management

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Non-thermal plasma-catalytic processes for CO2 conversion toward circular economy: fundamentals, current status, and future challenges

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environmental Science and Pollution Research 2024年 1-21页

作者： Mukhtar, Ahmad Saqib, Sidra Mohotti, Dinithi Ndeddy Aka, Robinson Jr. Hossain, Mokter Agyekum-Oduro, Ekow Wu, Sarah Department of Chemical and Biological Engineering University of Idaho MoscowID83843 United States Environmental Science Program University of Idaho MoscowID83844 United States

Practical and energy-efficient carbon dioxide (CO2) conversion to value-added and fuel-graded products and transitioning from fossil fuels are promising ways to cope with climate change and to enable the circular economy. The carbon circular economy aims to capture, utilize, and minimize CO2 emissions as much as possible. To cope with the thermodynamic stability and highly endothermic nature of CO2 conversion via conventional thermochemical process, the potential application of non-thermal plasma (NTP) with the catalyst, i.e., the hybrid plasma catalysis process to achieve the synergistic effects, in most cases, seems to promise alternatives under non-equilibrium conditions. This review focuses on the NTP fundamentals and comparison with conventional technologies. A critical review has been conducted on the CO2 reduction with water (H2O), methane (CH4) reduction with CO2 to syngas (CO + H2), CO2 dissociation to carbon monoxide (CO), CO2 hydrogenation, CO2 conversion to organic acids, and one-step CO2–CH4 reforming to the liquid chemicals. Finally, future challenges are discussed comprehensively, indicating that plasma catalysis has immense investigative areas. © The Author(s) 2024.

关键词： Circular economy

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Effects of climate change in winter ice cover and ice thickness in flooding: a case study of Grand River, Ohio, USA

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ISH Journal of Hydraulic engineering 2022年第S1期28卷 503-517页

作者： Lamichhane, Niraj Sharma, Suresh Subedi, Abhijit Sharma Civil and Environmental Engineering Program Youngstown State University YoungstownOH United States

The major objective of this research is to assess the effects of winter ice cover and simulate the flooding within bridge vicinity of the Grand River, Ohio, the USA for both in the historical period (1959–2014) and future period (2015–2098). The LiDAR data along with field-verified survey data were utilized for the calibration and validation of HEC-RAS. The stage increments up to 6.75 ft were detected at the upstream section of the Bridge due to historical ice jams. Moreover, the increment in the inundation area varied from 24% to 52% for various percentile winter flows. The percentage increase in the inundation area was highest for the 25-percentile flow than the higher percentile flow when the same thickness of ice cover was used in the simulation. The estimated ice thickness using Stefan’s equation for various emission scenarios (RCP 2.6, RCP 4.5 and RCP 8.5) for three climate models were found to be decreasing in the future period. As per the standard practice in the United States, authors have used U.S. Customary Unit System (fps unit system) in this paper. © 2020 Indian Society for Hydraulics.

关键词： Climate models

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Beyond p-y method:A review of artificial intelligence approaches for predicting lateral capacity of drilled shafts in clayey soils

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Journal of Rock Mechanics and Geotechnical engineering 2024年第9期16卷 3812-3840页

作者： M.E.Al-Atroush A.E.Aboelela Ezz El-Din Hemdan Civil and Environmental Engineering Program Engineering Management DepartmentCollege of EngineeringPrince Sultan UniversityRiyadhSaudi Arabia Department of Structural Engineering Faculty of EngineeringAin Shams UniversityCairoEgypt Structure and Materials Research Lab Prince Sultan UniversityRiyadhSaudi Arabia Computer Science and Engineering Department Faculty of Electronic EngineeringMenoufia UniversityMenoufiaEgypt

In 2023,pivotal advancements in artificial intelligence(AI)have significantly *** that in mind,traditional methodologies,notably the p-y approach,have struggled to accurately model the complex,nonlinear soil-structure interactions of laterally loaded large-diameter drilled *** study undertakes a rigorous evaluation of machine learning(ML)and deep learning(DL)techniques,offering a comprehensive review of their application in addressing this geotechnical challenge.A thorough review and comparative analysis have been carried out to investigate various AI models such as artificial neural networks(ANNs),relevance vector machines(RVMs),and least squares support vector machines(LSSVMs).It was found that despite ML approaches outperforming classic methods in predicting the lateral behavior of piles,their‘black box'nature and reliance only on a data-driven approach made their results showcase statistical robustness rather than clear geotechnical insights,a fact underscored by the mathematical equations derived from these ***,the research identified a gap in the availability of drilled shaft datasets,limiting the extendibility of current findings to large-diameter *** extensive dataset,compiled from a series of lateral loading tests on free-head drilled shaft with varying properties and geometries,was introduced to bridge this *** paper concluded with a direction for future research,proposes the integration of physics-informed neural networks(PINNs),combining data-driven models with fundamental geotechnical principles to improve both the interpretability and predictive accuracy of AI applications in geotechnical engineering,marking a novel contribution to the field.

关键词： Laterally loaded drilled shaft load transfer and failure mechanisms Physics-informed neural networks(PINNs) P-y curves Artificial intelligence(AI) Dataset

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Demystifying polyphosphate-accumulating organisms relevant to wastewater treatment: A review of their phylogeny, metabolism, and detection

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environmental Science and Ecotechnology 2024年第5期21卷 1-16页

作者： Lucia Ruiz-Haddad Muhammad Ali Mario Pronk Mark C.Mvan Loosdrecht Pascal E.Saikaly Environmental Science and Engineering Program Biological and Environmental Science and Engineering(BESE)DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal23955-6900Saudi Arabia Water Desalination and Reuse Center Biological and Environmental Science and Engineering(BESE)DivisionKing Abdullah University of Science and Technology(KAUST)Thuwal23955-6900Saudi Arabia Department of Civil Structural&Environmental EngineeringTrinity College DublinThe University of DublinDublin2Ireland Department of Biotechnology Delft University of TechnologyDelft2629 HZthe Netherlands

Currently,the most cost-effective and efficient method for phosphorus(P)removal from wastewater is enhanced biological P removal(EPBR)via polyphosphate-accumulating organisms(PAOs).This study integrates a literature review with genomic analysis to uncover the phylogenetic and metabolic diversity of the relevant PAOs for wastewater *** findings highlight significant differences in the metabolic capabilities of PAOs relevant to wastewater ***,Candidatus Dechloromonas and Candidatus Accumulibacter can synthesize polyhydroxyalkanoates,possess specific enzymes for ATP production from polyphosphate,and have electrochemical transporters for acetate and *** contrast,Tetrasphaera,Candidatus Phosphoribacter,Knoellia,and Phycicoccus possess PolyP-glucokinase and electrochemical transporters for sugars/amino ***,this review explores various detection methods for polyphosphate and PAOs in activated sludge wastewater treatment ***,FISH-Raman spectroscopy emerges as one of the most advanced detection ***,this review provides critical insights into PAO research,underscoring the need for enhanced strategies in biological phosphorus removal.

关键词： Polyphosphate-accumulating organisms(PAOs) Enhanced biological phosphorus removal (EBPR)Tetrasphaera Ca.accumulibacter Ca.phosphoribacter Knoellia Phycicoccus

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Analysis of the life cycle environmental impact reductions of remanufactured turbochargers

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Journal of Remanufacturing 2023年第2期13卷 187-206页

作者： Lee, Jong-Hyo Kang, Hong-Yoon Kim, Young-Woon Hwang, Yong Woo Kwon, Soon-Gil Park, Hee-Won Choi, Ji-Woo Choi, Hwan-Ho Program in Circular Economy Environmental System Inha University Incheon South Korea Department of Environmental Engineering Inha University Incheon South Korea

Recently, remanufacturing approach/technology, which includes a series of the processes of disassembling, cleaning, inspecting, repairing/reconditioning, reassembling components for resale, is becoming more popular as companies look for a way to combat the current climate crisis, and as it allows companies to reduce environmental impacts and to save energy and resources. This study analyzed the reduction effect of six environmental impacts and the savings effect of energy and resources by turbocharger remanufacturing compared to its newly manufacturing using a life cycle assessment (LCA) methodology. The results show that the most significant benefit of the turbocharger remanufacturing related to environmental impacts was the global warming potential (GWP), which could be reduced by 52.2%, followed by the abiotic depletion potential (ADP), terrestrial ecotoxicity potential (TETP), human toxicity potential (HTP), freshwater aquatic ecotoxicity potential (FAETP) and marine aquatic ecotoxicity potential (MAETP) which could be reduced by 51.9%, 44.8%, 44.2%, 42.6%, and 36.7%, respectively. Also, its resource saving could be obtained from 21.7 to 73.5% depending on the type of resources. Furthermore, turbocharger remanufacturing offered a significant energy saving of 83.9%. The results obtained from this study could be used for national policy-making to a net-zero carbon transition. © 2023, The Author(s).

关键词： Energy/Resources savings environmental impacts Life Cycle Assessment (LCA) Turbocharger remanufacturing

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Rechargeable Multivalent-Ion Batteries

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Energy Material Advances 2024年第1期5卷 283-284页

作者： Juchen Guo Jennifer LSchaefer Yuyan Shao Department of Chemical and Environmental Engineering Materials Science and Engineering ProgramUniversity of CaliforniaRiversideRiversideCA 92521USA Department of Chemical and Biomolecular Engineering University of Notre DameNotre DameIN 46556USA Pacific Northwest National Laboratory RichlandWA 99352USA

Rechargeable batteries based on multivalent metal anodes including earth-abundant magnesium(Mg),calcium(Ca),zinc(Zn),and aluminum(Al)are potential new“beyond lithium(Li)”electrochemical energy storage technologies for large-scale energy storage *** multivalent elements are more earth abundant,and therefore promising candidates for reducing global dependence on Li for our growing energy storage *** the seminal work by Aurbach and coworkers[1]demonstrating the first prototype rechargeable Mg batteries,tremendous efforts have been made to the research and development of rechargeable multivalent-ion batteries.

关键词： energy storage calcium batteries rechargeable batteries multivalent elements multivalent metal anodes energy storage technologies magnesium batteries

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Climate change effect on water temperature and evaporation in Lake Qarun

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Water Science 2023年第1期37卷 1-10页

作者： Seif, Elaf Shokr, Hamad Youssef, Adhm M. Sharaf Eddeen, Mohammed Diab, Yasmeen Imam, Yehya E. Environmental Engineering Program University of Science and Technology Zewail City of Science Technology and Innovation Giza Egypt

Climate change can have significant effects on the water and heat budgets of lakes and reservoirs. This study examined the effect of climate change on Lake Qarun through analyzing the temporal variation in lake surface temperature and evaporation from the lake. The analysis was based on the remote-sensing dataset MOD11A1 and the ERA5 climate reanalysis dataset. Daily surface temperatures for 1-km MOD11A1 pixels were filtered to remove outliers, averaged to obtain mean lake temperature, and then aggregated to compute the monthly average lake temperature. Lake evaporation was estimated by applying an un-mixing algorithm to ERA5 evaporation fluxes for mixed land-lake pixels and land-only pixels. The resulting monthly evaporation from the lake was corrected using a regression model based on evaporation estimates available in the literature for Lake Qarun. The regression model performance was confirmed through the Nash–Sutcliffe efficiency coefficient, correlation coefficient, and root mean square error. Over the period 1980 to 2019, findings show that annual evaporation ranged between 140 and 190 cm/year. Maximum average monthly evaporation for the study period is 21 cm in July while the minimum is 6.7 cm in February from 1980 to 2019. For the average lake surface temperature, it varied between ~31.9 and 33.9°C over the period 2000 to 2019. For the same time period, average maximum and minimum monthly temperatures were 44°C in August and 20.1°C in January. It is concluded that the average increase in evaporation and lake surface temperature is 37 mm/decade and 0.4°C/decade, respectively. The increase in both lake surface temperature and evaporation is likely due to climate change effects. However, using datasets with a larger temporal record for lake surface temperature, further studies can be applied for confirmation. Also, further confirmation can be obtained by applying the same analysis to other lakes in Egypt. © 2023 The Author(s). Published by Informa UK Limited,

关键词： Climate change ERA5 evaporation Lake Qarun MOD11A1

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