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5th International Seminar on Sustainable Urban Development, ISoSUD 2020

作者： Purnama, M.R. Adityawan, M.B. Farid, M. Chrysanti, A. Rayadi, B.T. Suryadi, Y. Water Resources Engineering and Management Undergraduate Program Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Jawa Barat Bandung Indonesia Water Resources Engineering Research Group Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Jawa Barat Bandung Indonesia Center for Coastal and Marine Development Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Jawa Barat Bandung Indonesia Geotechnical Engineering Research Group Faculty of Civil and Environmental Engineering Institut Teknologi Bandung Jawa Barat Bandung Indonesia

The 2018 Sulawesi Earthquake and Tsunami severely damaged the coast of Palu City, Indonesia. The city did not have adequate mitigation system for a tsunami. A tsunami inundation map is required. This study based on modelling four scenarios of possible earthquake-induced tsunami. The earthquakes were identified based on data from PUSGEN. The generated tsunami wave is simulated using Delft3D and Delft Dashboard. The wave propagation is modeled using nesting method. This method couples different grid sizes. Nesting process helps to ensure the model efficiency and accuracy. The results provide the maximum inundation map along the Palu City Coast. These results can be used by decision maker to develop the coastal zone management of Palu City. Furthermore, they can be utilized to propose a disaster risk management plan. © Published under licence by IOP Publishing Ltd.

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Nanocellulose Obtained from Biomass as Advance Adsorbent for Methylene Blue and Crystal Violet 5

Nanocellulose Obtained from Biomass as Advance Adsorbent for...

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5th International Conference on Advanced Material for Better Future 2020, ICAMBF 2020

作者： Mahardiani, L. Ilfama, R. Saputro, S. Pranolo, S.H. Septianing, P.W. Chemistry Education Study Program Faculty of Teacher Training and Education Sebelas Maret University Surakarta Indonesia Department of Chemical Engineering Faculty of Engineering Sebelas Maret University Surakarta Indonesia

In this research, the ability of papaya tree trunks as nanocellulose adsorbent for dyes removal was conducted. The synthesis of nanocellulose is carried out in several steps, including isolation of cellulose using the extraction method, immersion with a variety of alkaline bases, namely KOH, KOH+NH3, and KOH+Na2CO3 and synthesis of nanocellulose by hydrolysis reaction. The adsorption process was carried out in batch method, by contacting the nanocellulose adsorbent with the dye, then filtered and observed the change in concentration using UV-Vis. Meanwhile, to observe the functional groups contained in the nanocellulose obtained from synthesis of papaya tree stems FTIR result was evaluated. The results showed that all cellulose-forming groups (CO, CH2, CH) were present in synthesis nanocellulose in accordance with those of the commercial. The synthesis results with variations in the alkaline base which the closest to commercial yield was the variation with the alkaline KOH base. In addition, determination of adsorption performance of ones is compared with performance of commercial nanocellulose. © Published under licence by IOP Publishing Ltd.

关键词： Aromatic compounds

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Electrocoagulation for Hospital Wastewater Treatment: Comparing Neural Network Models for Performance Simulation

Biomedical Materials and Devices

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Biomedical Materials and Devices 2025年 1-28页

作者： Indira, Dewi Muzayyanah, Fitri Fauzi, Rifky Simanjuntak, Wasinton Yandri, Yandri Rohman, Fakhrony Sholahudin Sudibyo, Sudibyo Rakesh, Benadict Maryani, Anis Tatik Wibowo, Yudha Gusti Doctoral Program of Environmental Science Department of Postgraduate Program Universitas Lampung Lampung Indonesia Department of Mathematics Faculty of Science Institut Teknologi Sumatera Lampung Selatan Indonesia Department of Chemistry Universitas Lampung Lampung Indonesia Process Systems Engineering Centre (PROSPECT) Research Institute of Sustainable Environment (RISE) Universiti Teknologi Malaysia UTM Johor Bahru Johor 81310 Malaysia Research Center for Mining Technology National Research and Innovation Agency (BRIN) South Lampung 35352 Indonesia Council of Scientific and Industrial Research Institute of Minerals and Materials Technology Govt.of India Bhubaneswar India Postgraduate Program of Environmental Science Universitas Jambi Jambi Indonesia Department of Mining Engineering Faculty of Technologi Industry Institut Teknologi Sumatera Jl. Terusan Ryacudu Lampung Way Hui 35365 Indonesia Center for Green and Sustainable Materials Institut Teknologi Sumatera Lampung Indonesia

Hospital wastewater contains a complex mixture of pollutants, including biological, chemical, and pharmaceutical contaminants, which necessitates effective treatment strategies. This study investigates the efficiency of electrocoagulation for treating hospital wastewater while employing predictive modeling techniques, including feedforward neural networks (FFNN), neural Wiener (NW), neural Hammerstein (NH), and neural Hammerstein–Wiener (NHW) models. The electrocoagulation process was conducted using aluminum and carbon electrodes, with varying voltage levels (5 V, 10 V, and 15 V) and treatment durations (30, 60, 90, and 120 min). Key water quality parameters, including turbidity, biochemical oxygen demand (BOD), chemical oxygen demand (COD), Escherichia coli, and coliform bacteria, were analyzed before and after treatment. Results demonstrated that increasing voltage and contact time significantly enhanced pollutant removal, with the highest removal efficiencies observed at 15 V and 120 min. Electrocoagulation effectively reduced turbidity, BOD, and COD levels while achieving substantial microbial inactivation. The predictive models successfully captured electrocoagulation dynamics, with the neural Hammerstein–Wiener model exhibiting the highest accuracy (root mean square error [RMSE]: 0.0399, weighted mean absolute percentage error [WMAPE]: 0.0665). These findings suggest that electrocoagulation, coupled with advanced modeling techniques, provides a sustainable and efficient hospital wastewater treatment approach. Future research should focus on optimizing operational parameters, integrating hybrid treatment methods, and developing real-time monitoring systems to enhance treatment efficiency and cost-effectiveness. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2025.

关键词： Electrocoagulation Hospital wastewater Neural modeling Wastewater treatment

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Effective Municipal Wastewater Treatment at Low-Cost Using Coagulation/Precipitation Followed By Nano-Disinfection

Effective Municipal Wastewater Treatment at Low-Cost Using C...

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2021 AIChE Annual Meeting

作者： Mostafa, Mohamed K. Mahmoud, Ahmed S. Kamar, Mohamed T. Elshfai, Maha M. Moussa, M. Peters, Robert W. Cairo Egypt Egypt Environmental Engineering Program Zewail City of Science and Technology Giza Egypt Egypt Environmental Engineering Faculty of Engineering Mataria Helwan University Egypt Department of Civil Construction and Environmental Engineering University of Alabama at Birmingham BirminghamAL United States

ISBN: (纸本)9781713852834

Conventional wastewater treatment plants suffering from several industrial effluents overlap, trihalomethane (byproduct after free chlorine disinfection), and high construction cost. This study successfully prepared and compare a novel mixing of coagulants ferric/ferrous chloride (50:50) with other traditional individual coagulants such as ferric chloride, ferrous chloride, and aluminum chloride for domestic wastewater treatment. The results obtained indicated that the mixture of ferric/ferrous chloride is more efficient than other coagulants to meet the requirements of the Egyptian code for reuse of treated wastewater in different agricultural applications. Also, this study successfully replaced traditional chlorine addition by low-cost green synthesis of nano-Zero Valent Iron (GT-nZVI) for tertiary wastewater treatment. A continuous flow system was successfully built to achieve the treatment requirements in an economical and fast way. Finally, this study strongly supported using the proposed system rather than traditional wastewater treatment technologies in decentralized wastewater treatment units to overcome the combination of industrial effluents to the municipal wastewater networks and to reduce hazardous material produced after using traditional chlorine disinfectant. © 2021 American Institute of Chemical Engineers. All rights reserved.

关键词： Wastewater treatment

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Performance LoRa Technology for Autonomous Vehicles 24

Performance LoRa Technology for Autonomous Vehicles

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24th International Seminar on Intelligent Technology and Its Applications, ISITIA 2023

作者： Adi, Puput Dani Prasetyo Purnama, Iwan Siregar, Arfanda Anugrah Juledi, Angga Putra Edi, Firman Karim, Abdul Wahyu, Yuyu Maulana, Fairuz Iqbal Susilo, Suhardi Atmoko Budi Toni Harahap, Ilham Maliki Patria, Lintang Bandung Indonesia Labuhanbatu University Faculty of Science and Technology North Sumatra Labuhanbatu Indonesia Politeknik Negeri Medan Telecommunication Engineering Study Program North Sumatra Medan City Indonesia Batam Institute of Technology Faculty of Industrial Technology Department of Engineering Management Riau Islands Batam City Indonesia Budi Darma University Department of Information Technology North Sumatra Medan Indonesia Bina Nusantara University School of Computer Science Computer Science Department Jakarta Indonesia University Labuhanbatu Faculty of Teacher Training and Education North Sumatra Labuhanbatu Indonesia Universitas Terbuka Faculty of Engineering Jakarta Indonesia

ISBN: (纸本)9798350313956

This research is an approach to intelligent vehicles with a LoRa communication system, LoRaWAN compatible for Long-Range and Outdoor Communication, but in this paper, we will test the ability of LoRa to handle autonomous vehicles, a Blind-Adaptive Data method will be tried on vehicles systems. The system offered is when the vehicle is running, the sensor will send position data in real-time, the number of vehicles is four, and GPS data is sent alternately using the Blind Adaptive Data Rate principle to avoid data collisions, and when the GPS shows a certain position, the value of SF is ascertained, which affects the data rate and ToA, and the output given is RSSI on each car, speed of a car, power consumption of sensor nodes, signal power, SNR, Bit rate or data rate, and sensitivity. With the Blind ADR principle, it is ensured that there is no data collision between car position data that causes packet loss. © 2023 IEEE.

关键词： Autonomous vehicles

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Unravelling biosynthesis and biodegradation potentials of microbial dark matters in hypersaline lakes

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environmental Science and Ecotechnology 2024年第4期20卷 177-188页

作者： Zhiguang Qiu Yuanyuan Zhu Qing Zhang Xuejiao Qiao Rong Mu Zheng Xu Yan Yan Fan Wang Tong Zhang Wei-Qin Zhuang Ke Yu School of Environment and Energy Peking University Shenzhen Graduate SchoolShenzhen518055China AI for Science(AI4S)-Preferred Program Peking UniversityShenzhen518055China Southern University of Sciences and Technology Yantian Hospital Shenzhen518081China Institute of Biomedicine and Biotechnology Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055China State Key Laboratory of Isotope Geochemistry CAS Center for Excellence in Deep Earth ScienceGuangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou510640China School of Atmospheric Sciences Sun Yat-sen UniversitySouthern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai519082China Department of Civil Engineering University of Hong Kong999077Hong KongChina Department of Civil and Environmental Engineering Faculty of EngineeringUniversity of AucklandNew Zealand

Biosynthesis and biodegradation of microorganisms critically underpin the development of biotechnology,new drugs and therapies,and environmental ***,most uncultured microbial species along with their metabolic capacities in extreme environments,remain *** we unravel the metabolic potential of microbial dark matters(MDMs)in four deep-inland hypersaline lakes in Xinjiang,*** metagenomic binning,we uncovered a rich diversity of 3030 metagenomeassembled genomes(MAGs)across 82 phyla,revealing a substantial portion,2363 MAGs,as previously unclassified at the genus *** unknown MAGs displayed unique distribution patterns across different lakes,indicating a strong correlation with varied physicochemical *** analysis revealed an extensive array of 9635 biosynthesis gene clusters(BGCs),with a remarkable 9403 being novel,suggesting untapped biotechnological ***,some MAGs from potentially new phyla exhibited a high density of these *** biosynthesis,our study also identified novel biodegradation pathways,including dehalogenation,anaerobic ammonium oxidation(Anammox),and degradation of polycyclic aromatic hydrocarbons(PAHs)and plastics,in previously unknown microbial *** findings significantly enrich our understanding of biosynthesis and biodegradation processes and open new avenues for biotechnological innovation,emphasizing the untapped potential of microbial diversity in hypersaline environments.

关键词： Biosynthesis Biodegradation Hypersaline lakes Metagenome-assembled genomes Microbial dark matters

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3d Aerodynamic Blade Performance of a Novel Plant Airfoil

SSRN

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SSRN 2023年

作者： Rosa, Firlya Soetikno, Priyono Suweca, I. Wayan Moelyadi, Mochammad Agoes Mechanical Engineering Study Program Faculty of Mechanical and Aerospace Engineering Bandung Institute of Technology Bandung40132 Indonesia Department of Mechanical Engineering Faculty of Engineering Universitas Bangka Belitung 33172 Indonesia Fluid Machinery Laboratory Faculty of Mechanical and Aerospace Engineering New and Renewable Research Bandung Institute of Technology Bandung40132 Indonesia

Based on the morphology of the banana leaf's midrib, this study investigates, designs, models, and analyzes the performance of a 3D airfoil in terms of aerodynamics. The objective is to discover if the banana leaf midrib airfoil is suitable for a low-wind-velocity horizontal-axis wind turbine. Model the aerodynamic analysis wind velocity at 3, 4, 5, 6, and 7 meters per second applying QBLADE and ANSYS Fluent. The selected tip speed ratio is 6 for a blade with a radius of 12.5 m and a chord length of 3.180 m. The investigation is conducted in 3D with QBLADE and ANSYS Fluent. Single Reference Frame (SRF) approach with periodic boundary conditions in ANSYS Fluent. According to the data, the coefficient of power was calculated to be 0.46 when QBLADE was used. The average margin of error was 16.4 percentage points lower when using ANSYS FLUENT software instead of QBLADE. Blades with a banana leaf midrib airfoil profile can offer good power even at low wind speeds, as shown by both programs. © 2023, The Authors. All rights reserved.

关键词： Morphology

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Improving the crosslinking of collagen casing and glutaraldehyde by facilitating the formation of conjugate structure via pH

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Collagen and Leather 2024年第3期6卷 66-79页

作者： Zhe Yu Jingmin Wu Ting Zhang Chi Chen Yun Ma Hongxiang Liu Bor-Sen Chiou Fei Liu Jian Li State Key Laboratory of Food Science and Resources Science Center for Future FoodsSchool of Food Science and TechnologyInternational Joint Laboratory on Food SafetyJiangnan UniversityWuxi 214122China Jiaxing Institute of Future Food Jiaxing 314050China Department of Food Technology Food Safety and HealthFaculty of Bioscience EngineeringGhent UniversityCoupure Links 653Ghent 9000Belgium Faculty of Biotechnology and Food Engineering Technion-Israel Institute of TechnologyHaifa 3200003Israel Biotechnology and Food Engineering Program Guangdong Technion-Israel Institute of TechnologyShantou 515063China Western Regional Research Center ARSU.S.Department of AgricultureAlbanyCA 94710USA Laboratory of Environmental Biotechnology School of Environment and EcologyJiangnan UniversityWuxi 214122China

Glutaraldehyde(GTA) crosslinking is commonly used to improve the thermal stability and mechanical strength of collagen casings. The aim of this research was to determine the optimal pH of the crosslinking between GTA and collagen as well as the crosslinking mechanisms. The weakly alkaline environment could facilitate the generation of GTA polymerization through the rapid generation of -C=C-C=O and -N=C-C=C- conjugated structures, and enhance the crosslinking reaction of GTA polymers with collagen amino groups. In the pH range of 8–10, the fibril diameter and d-space value declined significantly in the self-assembled collagen fibril-GTA system. Meanwhile, collagen casing films crosslinked with GTA in weakly alkaline conditions exhibited higher mechanical strength and thermal stability. These results suggest that the crosslinking of collagen casings and GTA can be improved by adjusting the pH. Possible crosslinking mechanisms related to the formation of conjugated long chains have also been proposed. This study could provide guidance on the appropriate use of GTA in the production process of collagen casings.

关键词： Glutaraldehyde Collagen casings Crosslinking pH Conjugate structure

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Customer Segment Classification Prediction in the Australian Retail Based on Machine Learning Algorithms 4

Customer Segment Classification Prediction in the Australian...

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4th International Conference on Machine Learning and Computer Application, ICMLCA 2023

作者： Luo, Yiming Zhang, Rui Wang, Fei Wei, Tao Business Schoo The University of Sydney Sydney Australia Computer and Information Sciences Program Harrisburg University of Science and Technology Harrisburg United States Faculty of Science and Technology Beijing Normal University-Hong Kong Baptist University United International College Zhuhai China School of Chemical and Environmental Engineering Sichuan University of Science and Engineering Zigong China

ISBN: (纸本)9798400709449

Customer segmentation is an essential area of business analytics today. Accurate customer segmentation is access to improves the efficiency of marketing campaigns and customer satisfaction. This study employs multiple machine learning methods to classify Australian Retail company BIGW's customer segments and first to apply multiple model explanation methods to find insights related to customer segmentation identification. After rigorous comparison and hyperparameter fine-tuning, XGBoost is the most adept for this dataset. We derive three key insights through the model results and model interpretive methods. First, BIGW's primary clientele comprises young families in urban areas who prefer cost-effective products, establishing the foundation of their consumer base. Second, the model result indicates a notable gap in BIGW's understanding of its high-end customers, suggesting an area for immediate attention. Third, a specific customer segment emerges from the data: individuals favoring online shopping, demonstrating high total expenditure but low interest in promotions, representing a high-value segment. © 2023 ACM.

关键词： Customer satisfaction

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An Implementation of Web Based GIS for Distribution of Freshwater Fish Ponds 9

An Implementation of Web Based GIS for Distribution of Fresh...

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9th International Conference on Cyber and IT Service Management, CITSM 2021

作者： Yulfiperius Herawan Hayadi, B. Utami, Risnita Tri Firman Zulkhasyni Pardiansyah, Dedi Universitas Prof. Dr. Hazairin SH Aquaculture Study Program Faculty of Agriculture Bengkulu Indonesia Universitas Prof. Dr. Hazairin SH Informatics Study Program Faculty of Engineering Bengkulu Indonesia

ISBN: (纸本)9781665435482

Geographical Information System is a term in the field of mapping which has a scope of how a system can unify geographic objects and their information. Freshwater fishery is the business of the majority of residents of South Bengkulu Regency covering tilapia and catfish. The solution is to create a web-based Freshwater Fish Pond GIS application using the PHP programming language. Making a database using MySQL, and for geolocation storage using Google Fusion Tables. The web that will be created will later display the GIS Web-based Freshwater Fish Pond Distribution Mapping in South Bengkulu Regency. Each pond will be accompanied by information such as the name of the owner, type of fish, type of pond, and location of the pond. It is known that the number of ponds in 4 villages in 2 districts in South Bengkulu Regency has reached 100 ponds consisting of 80 tilapia fish ponds, 20 catfish ponds. © 2021 IEEE.

关键词： Geographic information systems

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