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10th International Conference on Smart Computing and Communication, ICSCC 2024

作者： Wedagama, Dewa Ayu Trisna Adhiswari Indrashwara, Decky Cipta Agung Ananda Putra, I Gusti Universitas Pendidikan Nasional Environmental Engineering Study Program Denpasar Indonesia Universitas Pendidikan Nasional Civil Engineering Study Program Denpasar Indonesia

ISBN: (纸本)9798350363104

The incorporation of information and communication technology (ICT) to improve infrastructure and establish a efficient and responsive environment is a key element of Denpasar Citys ambition to evolve into a Smart City. This research delves into the utilization of E Government, via the Dama Mandala app underscoring its significance in this transition. Through surveys and interviews employing a methodology the study demonstrates that the Dama Mandala app has greatly enriched the lives of Denpasar Citys inhabitants by granting them access to government services and information online. These results imply that the app plays a role, in realizing Denpasar Citys aspiration of becoming a culture oriented Smart City advancing towards the vision of Denpasar Maju. © 2024 IEEE.

关键词： Smart city

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Numerical modeling of nutrient transport to assess the agricultural impact on the trophic state of reservoirs

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International Soil and Water Conservation Research 2023年第1期11卷 197-212页

作者： Franklin Torres-Bejarano Jesús García-Gallego Javier Salcedo-Salgado Department of Environmental Engineering University of CordobaCarrera 6 No.77-305230002MonteriaColombia Environmental Engineering Program University of CordobaCarrera 6 No.77-305230002MonteriaColombia

A trophic state increase relates to surface water bodies nutrient enrichment,due to the chemical products used such as fertilizers in agriculture and residues from cattle raising *** research consists of nutrient transport numerical modeling to analyze the Betancíreservoir trophic state in Colombia;Water samples were collected to analyze total nitrogen,total phosphorus,ammonia,nitrates,nitrites,phosphates,chlorophyll-a,dissolved oxygen,BOD,COD,suspended solids,and water *** water quality model MOHID Studio was implemented and after its calibration,scenarios of increase and decrease of nutrients and inflows to the reservoir through its main tributaries were simulated to reproduce the agricultural activity changes in the basin and the effects that would have on the reservoir's trophic state dynamics;Therefore,the Carlson Trophic Status Index was calculated for each *** results show that variations in total nitrogen concentration and increased inflows present short-term consequences on the reservoir's trophic *** the incoming total nitrogen con-centrations by 100%causes the reservoir to change from a light eutrophic to a hypereutrophic *** results of this research provide a starting tool to water resources integrated management in reservoirs.

关键词： environmental modeling Trophic state index Nutrient transport Eutrophication Water pollution

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A Review of Smart City Initiatives: Assessing the Integration and Impact on Sustainable environmental Management in Urban Heritage Sites 7

A Review of Smart City Initiatives: Assessing the Integratio...

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7th International Conference on Informatics and Computational Sciences, ICICoS 2024

作者： Irawan, Bagus Syafrudin, Syafrudin Budihardjo, Mochamad Arief Universitas Diponegoro Program in Environmental Science School of Postgraduate Studies Semarang Indonesia Universitas Diponegoro Faculty of Engineering Department of Environmental Engineering Semarang Indonesia

ISBN: (纸本)9798350375886

In the digital age, managing urban heritage sites presents unique challenges that necessitate the integration of smart technologies. This review assesses the integration and impact of smart city initiatives on sustainable environmental management in urban heritage sites. Through a comprehensive literature review of 84 papers from ScienceDirect and Scopus, this study categorizes the findings into three themes: Smart City Initiative Analysis, Heritage Site Considerations, and Smart Technology Integration Models. The review highlights the significant contributions of smart technologies, such as digital analysis, 3D documentation, and Information and communication technology, in enhancing sustainability and preserving cultural values. Case studies from Amsterdam, Barcelona, Seville, and Uzbek illustrate these initiatives' practical applications and outcomes. The paper underscores the need for robust policies, public awareness, and multidisciplinary collaboration to maximize the benefits of smart city initiatives. Finally, the study identifies gaps in current research and suggests further research directions for integrating smart technologies into urban heritage site management. © 2024 IEEE.

关键词： Sustainable city

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Ethane integration project—a study for Egyptian NGLs plants and their economics

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Journal of engineering and Applied Science 2024年第1期71卷 169页

作者： Elzohairy, Hamdy R. Ahmed, Tamer S. El-Marsafy, Sahar M. Chemical Engineering Department Faculty of Engineering Cairo University Giza12613 Egypt New Cairo Egypt Environmental Engineering Program Zewail City of Science and Technology 6th of October City Giza12578 Egypt

For Egypt, ethane is a vital chemical precursor, with the potential to significantly attract financial resources and drive economic growth. Enhancing its added value necessitates efficient recovery of ethane before it enters the national grid without processing. This research investigates the technical and economic feasibility of integrating natural gas liquids (NGLs) from three Egyptian NGLs plants—South Western Desert NGLs (SWD NGLs), North Western Desert NGLs (NWD NGLs), and East Mediterranean NGLs (EMD NGLs)—to improve ethane recovery from natural gas fields. The study focuses on revamping these NGLs plants using various NGLs recovery techniques, conducting a comprehensive comparison to identify the most effective methods for processing rich feed gas. Detailed design of the NGLs recovery processes was developed using HYSYS V.14 simulation software and supplementary calculation sheets. The design criteria encompass both technical and economic parameters to ensure a holistic approach in meeting project requirements. Results indicate a significant increase in ethane recovery: 16% for SWD NGLs, 10% for NWD NGLs (A, B, C), and 85% for EMD NGLs. This improvement will boost ethane feedstock for petrochemical companies from 2000 ton/day to 3500 ton/day, enabling increased polyethylene production. Economic analysis for the base case shows an expected internal rate of return (IRR) of 26%, a net present value (NPV) of USD 73 million, and a payback period of approximately 3 years. Sensitivity analysis on product prices, feed gas prices, and total capital investment confirms the project’s economic viability, with all cases showing feasibility (IRR ≥ 15%) except when product prices fall below USD 225/ton for propane, USD 215/ton for liquefied petroleum gas (LPG), and USD 25/bbl for condensate. This study highlights the potential for enhanced ethane recovery, offering substantial economic benefits and supporting the growth of Egypt’s petrochemical industry. © The Author(s) 202

关键词： Ethane

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Rotary Algae Biofilm Reactor (RABR) using microalgae Chlorella sp. for tofu wastewater treatment

Rotary Algae Biofilm Reactor (RABR) using microalgae Chlorel...

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3rd International Conference on Chemical engineering and Applied Sciences, ICChEAS 2022

作者： Elystia, Shinta Nasution, Fakhriyah Hanifa Mazaya Sasmita, Aryo Environmental Engineering Program Chemical Engineering Department Riau University Pekanbaru28293 Indonesia

Indonesia was known to be dominated by the household-scale tofu industry, with limited funds to treat the tofu wastewater produced. Therefore, the producers choose to directly discharge the tofu wastewater to a ditch or other water body without appropriate treatment. Tofu wastewater can pollute the aquatic environment due to its content, consisting of organic compounds and high nutrients. Utilization of tofu wastewater as a source of nutrients to support the growth of microorganisms such as the microalgae (Chlorella sp.) can be an alternative to the problem of tofu wastewater using Rotary Algae Biofilm Reactor (RABR) technology. This study aims to determine the growth rate of microalgae and the removal of COD and NH3parameters by cultivating Chlorella sp. On a medium with various treatments of tofu wastewater concentration, namely 40%, 60%, 80%, and 100%, and contact time within (0, 1, 3, and 5 days). The results showed that in the treatment of 40% tofu wastewater concentration on day 5, the highest COD and NH3removal efficiencies were 75.88% and 80.45%, respectively, with the total density of suspended and attached cells of Chlorella sp. of 3.99 × 106cells/mL. © 2023 Elsevier Ltd. All rights reserved.

关键词： Nutrients

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Analysis of the institutional development of drinking water supply systems in XYZ City,Indonesia coastal area

River

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River 2023年第2期2卷 158-168页

作者： Firdaus Ali Dwi L.Lestari Marsya D.Putri Khalidah N.Azmi Indonesia Water Institute South JakartaIndonesia Department of Civil Engineering Faculty of EngineeringEnvironmental Engineering Study ProgramUniversitas IndonesiaKampus UI DepokDepok CityIndonesia

Based on the Regulation of the Minister of Public Works and Public Housing Number 4 of 2020,drinking water supply management can stand alone or work together with other *** local government establishes a Regional Drinking Water Company which has responsibility for supplying drinking water at the regency/city *** coastal city as the object of study manages clean water then transfers under a private *** to government restrictions regarding the authority to provide clean water,a technical implementation unit was formed for better solution in clean water *** new form of institution will be able to make decisions and carry out execution at any time because it is directly under the authority of the government,it can also apply the concept of good governance to support more transparent *** accordance with the policy,the new institutional form will be able to finance itself,develop the level of service and contribute to regional development as a source of local ***,the institutional transition requires adaptation both from a functional and operational *** this study,an analysis of the readiness for the transition of institutional forms is carried out to minimize conflicts such the lack of improvement in the quality of drinking water services due to limited government authority,insufficient qualified human resources in water management,and the difficulty of developing drinking water service infrastructure because it still depends on the private *** analysis of the structure and human resources associated with clean water service targets also *** strengthening,both regulatory and institutional,is necessary to maximize the roles and functions of the relevant *** a more comprehensive understanding in the preparation of contracts and division of authority,no parties will be aggrieved in the long term.

关键词： clean water services human resources institutions

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Development of a hazard risk map for assessing pedestrian risk in urban flash floods:A case study in Cúcuta,Colombia

River

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River 2024年第1期3卷 8-23页

作者： Gerald Augusto Corzo Perez Diego Ivan Sanchez Tapiero Manuel Antonio Contreras Martínez Chris Zevenbergen IHE Delft Institute for Water Education Hydroinformatics and Digital InnovationDelftThe Netherlands Master in Environmental Engineering Civil Engineering ProgramFaculty of Engineering and ArchitectureUniversity of PamplonaPamplonaColombia Faculty of Civil Engineering and Geosciences Delft University of TechnologyDelftThe Netherlands

The rapid growth of impervious areas in urban basins worldwide has increased the number of impermeable surfaces in cities,leading to severe flooding and significant economic losses for *** trend highlights the urgent need for methodologies that assess flood hazards and specifically address the direct impact on pedestrians,which is often overlooked in traditional flood hazard *** study aims to evaluate a methodology for assessing the risk to pedestrians from hydrodynamic forces during urban floods,with a specific focus on Cúcuta,*** methodology couples research outcomes from other studies on the impact of floodwaters on individuals of different ages and sizes with 1D/2D hydrological *** computational algorithms for image recognition were used to measure water levels at 5-s intervals on November 6,2020,using drones for digital elevation model data *** Cúcuta,where flood risk is high and drainage infrastructure is limited,the PCSWMM(Computer-based Urban Stormwater Management Model)was calibrated and validated to simulate extreme flood *** model incorporated urban infrastructure details and geomorphological parameters of Cúcuta's urban *** return periods(5,10,50,100),with extreme rainfall of 3 h,were used to estimate the variability of the risk *** output of the model was analyzed,and an integrated and time-varying comparison of the results was *** show that the regions of high-water depth and high velocity could vary significantly along the duration of the different extreme ***,from 5 to 100 years return period,the percentage of area at risk increased from 9.6%to 16.6%.The pedestrian sensitivity appears much higher than the increase in velocities or water depth *** study identified medium to high-risk locations,which are dynamic in *** can conclude dynamics are spatiotemporal,and the added information layer of pedestrians brings vulnerability information that is a

关键词： hazard and risk mapping pedestrian risk urban flood

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Collective wetting transitions of submerged gas-entrapping microtextured surfaces

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Droplet 2024年第3期3卷 102-106页

作者： Sankara Arunachalam Himanshu Mishra Environmental Science and Engineering Program Biological and Environmental Sciences and Engineering DivisionKing Abdullah University of Science and Technology(KAUST)ThuwalKingdom of Saudi Arabia Water Desalination and Reuse Center King Abdullah University of Science and Technology(KAUST)ThuwalKingdom of Saudi Arabia

Numerous natural and industrial processes entail the spontaneous entrapment of gas/air as rough/patterned surfaces are submerged under *** the wetting transitions ensue,the gas diffuses into the water leading to the fully water-filled ***,the standard models forwetting do not accountfor the microtexture’s topography on collective wetting *** other words,it is not clear whether the lifetime of n cavities arranged in a one-dimensional(I-D)line or a two-dimensional(II-D)(circular or square)lattice would be the same or not as a single 0-D *** response,we tracked the time-dependentfates of gas pockets trapped in I-D and II-D lattices and compared them with wetting transitions in commensurate 0-D ***,the collective wetting transitions in the I-D and the II-D arrays had a directionality such thatthe gas from the outermost cavities was lostthe first,while the innermost gotfilled by water the *** essence,microtexture’s spatial organization afforded shielding to the loss of the gas from the innermost cavities,which we probed as a function of the microtexture’s pitch,surface density,dimensionality,and hydrostatic *** findings advance our knowledge of wetting transitions in microtextures and inspiring surface textures to protect electronic devices against liquid ingression.

关键词： topography transitions submerged

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

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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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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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