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4th International Conference on Energy, Environment, Epidemiology and Information System, ICENIS 2019

作者： Fomba, Ahmed Jumui Sumoi Hermawan, Hermawan Andromeda, Trias Facta, Mochammad Setiawan, Iwan Magister Study Program of Electrical Engineering Diponegoro University Semarang Indonesia Department of Electrical Engineering Faculty of Engineering Diponegoro University Semarang Indonesia

This paper presents a simulation of a grid-connected photovoltaic power system. A complex model of power distribution system is developed in MATLAB Simulink, then it will be simulated to determine an amount of power delivered to the grid based on irradiance and temperature. Solar irradiance data collection is conducted using a solar irradiance meter. These weather data (solar irradiances and temperatures) are transformed into signal inputs and model through a grid-tied Photovoltaic (PV) model system which consists of PV, incremental conductance Maximum Power Point Tracking (MPPT) method, DC-DC boost converter, inverter, voltage source converter (VSC) control algorithms, and grid equipment. The output variables can be related to current, voltage or power. However, tracing of the current-voltage (I-V) characteristics or power-voltage (P-V) characteristics are the vital need to grid-tied PV system operation. Changes in solar irradiance and temperature imply changes in output variables. Detailed modelling of the effect of irradiance and temperature, on the parameters of the PV module and the output parameters will be discussed. With the aid of this model, one can have a feasible idea about the solar energy generation potential at given locations. This comprehensive model is simulated using MATLAB/Simulink software. © The Authors, published by EDP Sciences, 2019.

关键词： Solar energy

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Simulation of the effect of floodway on Batang Kandis River flood control 1

Simulation of the effect of floodway on Batang Kandis River ...

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1st Conference on Innovation in Technology and engineering Science, CITES 2018

作者： Junaidi Marona, S. Dalrino Civil Engineering Department of Faculty Andalas University Indonesia Master Program Civil Engineering Department Andalas University Indonesia Civil Engineering Department Padang State Polytechnic Indonesia

Floods often occur in Padang City, mainly in the areas of Pasia Nan Tigo Village and Lubuk Buaya Village, caused by the overflow of Batang Kandis when heavy rains occur (intensity of rainfall >15mm/hours). To decrease the river overflow an artificial canal with 300 m long and 50 m wide (floodway) was constructed to bypassing the river flow from the Batang Kandis River to the ocean. In order to find out the effects of the floodway, four scenarios are performed the scenario 1 and 2 were the simulation condition of Batang Kandis River before and after the construction of floodway. While to increase the effectiveness of floodway, simulations 3 and 4 were carried out. Scenario 3 was the combination of floodway with normalization and embankment. To prevent the entry of seawater into the Batang Kandis River, because the floodway is affected by the tide of the sea, then 3-door motion weir was simulated namely scenario 4. Scenario 4 was the combination of floodway normalization, embankment, and a 3 door motion weir. From the simulations, we found that the floodway was effective to decrease the water surface level up to 15 m and 20 m during 10 years and 25 year return period of discharge respectively. From the scenario 3, we found that the embankment with 1.5 m and 2 m was effective to prevent overflow by 10-year and 25-year return period of discharge respectively. While for scenario 4 the water level rises 0.5 m due to motion weir So, that it is needed to extend the embankment with 0,5m high. © 2019 IOP Publishing Ltd.

关键词： Weirs

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Novel insights into curcumin adsorption: Kinetics and mechanisms of decolorization using Pondoh snake fruit seed biochar

Next Research

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Next Research 2025年第2期2卷

作者： Wilna Iznilillah Mohamad Ali Fulazzaky Arti Hastuti Asep Bayu Dani Nandiyanto Meli Fiandini Khalida Muda Faculty of Halal Food Science Universitas Djuanda Jalan Tol Ciawi No 1 Ciawi Bogor 16720 Indonesia Study Program of Environmental Science Faculty of Engineering and Science Universitas Ibn Khaldun Bogor Jalan Sholeh Iskandar Kedungbadak Bogor 16162 Indonesia Faculty of Mathematics and Natural Science Education Universitas Pendidikan Indonesia Jalan Dr Setiabudhi No 229 Bandung 40154 Indonesia Faculty of Civil Engineering Universiti Teknologi Malaysia 81310 UTM Skudai Johor Bahru Malaysia

Utilizing natural waste materials to decolorize synthetic and natural dyes offers a promising solution for mitigating environmental pollution. The adsorption isotherms and decolorization kinetics of curcumin onto Pondoh snake fruit seed (PSFS) biochar were predicted using ten isotherm models and the Generalized Fulazzaky (GF) equations, respectively, providing insights into the behavioral characteristics of the adsorption process. Simulations using the Harkin-Jura model demonstrated a good fit, with R ² values exceeding 0.6909 across PSFS biochar granular sizes of 13.65, 25.49, and 65.13 μm, indicating capillary condensation and multilayer adsorption, which validates the GF equations’ applicability. Applying the GF equations to adsorption kinetics simulations showed that declining external mass transfer (EMT) rates were offset by increasing internal mass transfer (IMT) rates. The increase in IMT rates ([ k L a ] d < 0.0 min −1 ) was less pronounced than the decrease in EMT rates ([ k L a ] f > 0.0 min −1 ), suggesting IMT governs curcumin adsorption’s rate-limiting step. PSFS biochar with an average granular size of 25.49 μm proved most effective for decolorizing 100 mg L −1 curcumin, exhibiting a global mass transfer rate range of 0.0020 to 0.0079 min −1 . Utilizing PSFS biochar for curcumin removal contributes to sustainable environmental remediation by advancing green technologies and informing dye effluent management strategies.

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study on the waste valve's stroke to water hammer pressure and flow patterns in a hydraulic ram pump

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AIP Conference Proceedings 2023年第1期2568卷

作者： I. P. Widiarta M. Suarda I. G. K. Sukadana M. Sucipta N. M. Suantini I. N. Suweden 1Student at Master Study Program of Mechanical Engineering Faculty of Engineering Udayana University Denpasar Bali Indonesia 2Mechanical Engineering Department Faculty of Engineering Udayana University Denpasar Bali Indonesia 3Chemistry Department Faculty of Mathematics and Natural Science Udayana University Denpasar Bali Indonesia 4Electrical Engineering Department Faculty of Engineering Udayana University Denpasar Bali Indonesia

The pressure in the hydraulic ram pump increases due to a sudden cessation of flow out through the waste valve when the waste valve is closing. The increasing of water hammer pressure is strongly influenced by velocity of the water flow in the drive pipe. Therefore, the waste valve has an important role in mechanism of the occurrence of water hammer pressure, performance, and flow patterns in the hydraulic ram pump. This study investigated the water hammer pressure and the flow patterns in the hydraulic ram pump that has been installed at Bon sub-village, as well as its performance at various strokes of the waste valve. In addition, CFD simulation using Ansys Fluent was conducted. The result show that increasing stroke of the waste valve increase the water velocity in the drive pipe and the water hammer pressure, and the optimum of the waste valve stroke has been predicted subject to volumetric and total efficiency using the equation of their trendlines. Furthermore, the flow patterns such as vortex, split flow, and blockage mass in the hydraulic ram pump have been identified.

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Design and Implementation study of 3.12 kWp on - Grid Rooftop Solar PV System 7

Design and Implementation Study of 3.12 kWp on - Grid Roofto...

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7th International Conference on Electrical engineering and Informatics, ICEEI 2019

作者： Mizard, Ariyq Naufal Aryani, Dwi Riana Verdianto, Ariono Hudaya, Chairul Faculty of Engineering Universitas Indonesia Department of Electrical Engineering Indonesia Energy System Engineering Master Study Program Faculty of Engineering Universitas Indonesia Kampus Baru UI Depok 16424 Indonesia

ISBN: (纸本)9781728124186

Conversion of fossil fuels as an energy source can be achieved by optimizing the use of renewable energy. One of the most used renewable energy is solar photovoltaics (PV). At present, solar power plant is an electrification support system for certain buildings because the abundant availability of solar radiation. On this research, Power and energy observations are carried out to determine measure the load power trend, the amount of energy flow from PV to the load, as well as import or export power from or to utility grid by direct measurement on Mosque of faculty of engineering, Universitas Indonesia. According to the study, the highest power generated by solar power plant mostly occurs at 12:00 - 13:00 with the highest power generated by PV is 2,344 W and the exported power is 939 W, and 32.19% - 55.67% electricity energy savings consumption from utility grid. © 2019 IEEE.

关键词： Solar energy

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A review of biosensor for environmental monitoring: principle, application, and corresponding achievement of sustainable development goals

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Bioengineered 2023年第1期14卷 58-80页

作者： Chi-Wei Huang Chitsan Lin Minh Ky Nguyen Adnan Hussain Xuan-Thanh Bui Huu Hao Ngo Department of Marine Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung Taiwan. Ph.D. Program in Maritime Science and Technology College of Maritime National Kaohsiung University of Science and TechnologyPh.D. Program in Maritime Science and Technology Kaohsiung Taiwan. Ph. D. Program of Aquatic Science and Technology College of Hydrosphere Science National Kaohsiung University of Science and Technology Kaohsiung Taiwan. Department Water Science & Technology Key Laboratory of Advanced Waste Treatment Technology Ho Chi Minh City University of Technology (HCMUT) Vietnam National University Ho Chi Minh (VNU-HCM) Ho Chi Minh City Vietnam. Department Water Science & Technology Faculty of Environment & Natural Resources Ho Chi Minh City University of Technology (HCMUT) Ho Chi Minh City Vietnam. Department Water Science & Technology Centre for Technology in Water and Wastewater School of Civil and Environmental Engineering Faculty of Engineering and Information Technology University of Technology Sydney Sydney NSW Australia.

Human health/socioeconomic development is closely correlated to environmental pollution, highlighting the need to monitor contaminants in the real environment with reliable devices such as biosensors. Recently, variety of biosensors gained high attention and employed as application, in real-time, and cost-effective analytical tools for healthy environment. For continuous environmental monitoring, it is necessary for portable, cost-effective, quick, and flexible biosensing devices. These benefits of the biosensor strategy are related to the Sustainable Development Goals (SDGs) established by the United Nations (UN), especially with reference to clean water and sources of energy. However, the relationship between SDGs and biosensor application for environmental monitoring is not well understood. In addition, some limitations and challenges might hinder the biosensor application on environmental monitoring. Herein, we reviewed the different types of biosensors, principle and applications, and their correlation with SDG 6, 12, 13, 14, and 15 as a reference for related authorities and administrators to consider. In this review, biosensors for different pollutants such as heavy metals and organics were documented. The present study highlights the application of biosensor for achieving SDGs. Current advantages and future research aspects are summarized in this paper. ATP: Adenosine triphosphate; BOD: Biological oxygen demand; COD: Chemical oxygen demand; Cu-TCPP: Cu-porphyrin; DNA: Deoxyribonucleic acid; EDCs: Endocrine disrupting chemicals; EPA: U.S. Environmental Protection Agency; Fc-HPNs: Ferrocene (Fc)-based hollow polymeric nanospheres; FeO@3D-GO: FeO@three-dimensional graphene oxide; GC: Gas chromatography; GCE: Glassy carbon electrode; GFP: Green fluorescent protein; GHGs: Greenhouse gases; HPLC: High performance liquid chromatography; ICP-MS: Inductively coupled plasma mass spectrometry; ITO: Indium tin oxide; LAS: Linear alkylbenzene sulfonate; : Laser-induced g

关键词： Biosensor bioavailability heavy metals organic pollutants sustainable development goals (SDGs)

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Evaluation of communal wastewater treatment plant based on technical, institutional, and community participation aspects in South Surabaya 1

Evaluation of communal wastewater treatment plant based on t...

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1st International Conference on Science and Technology for Environmental Protection, ICSTEP 2018

作者： Purnawanti, E. Oktavitri, N.I. Isnadina, D.R.M. Fitriani, N. Environmental Engineering Study Program Department of Biology Faculty of Science and Technology Universitas Airlangga Indonesia

This study aims to discover the obstacles and provide recommendations on the technical and institutional aspects of the chosen communal WWTP. The methods used in this study were field survey and questionnaire. the data were analyzed using quantitative, qualitative, and SWOT analysis. There are 11 out of 13 communal WWTPs that do not work optimally. The technical obstacle encountered in the operation of the chosen communal WWTPs is the huge building capacity that does not meet the criteria of HRT design. The recommendations for the technical problem include lowering the water level and reducing the number of baffles in communal WWTP. The obstacle faced in the operation of chosen communal WWTPs in terms of institutional and community participation aspects is that the maintenance is only known by few people. The recommendation for the aspects of institutional and community participation is for KPP to arrange a socialization on the maintenance of communal WWTP based on its maintenance module. © 2019 IOP Publishing Ltd.

关键词： Maintenance

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The role of transformational leadership, work environment, motivation on job satisfaction and teachers performance of vocational schools

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AIP Conference Proceedings 2023年第1期2765卷

作者： Edy Siswanto Samsudi Eko Supraptono Yeri Sutopo Agus Purwanto Doctoral Program Students in Educational Management Universitas Negeri Semarang Semarang 50229 Indonesia Mechanical Engineering Education Faculty of Engineering Universitas Negeri Semarang Semarang 50229 Indonesia Electrical Engineering Education Faculty of Engineering Universitas Negeri Semarang Semarang 50229 Indonesia Civil Engineering Education Faculty of Engineering Universitas Negeri Semarang Semarang 50229 Indonesia Doctoral Program Students in Management Universitas Pelita Harapan Tangerang 15811 Indonesia

The purpose of this study was to analyze the effect of job satisfaction, motivation, Transformational leadership, work on jobs and teachers’ performance of vocational schools. This research uses quantitative methods to test and prove the hypotheses that have been made through various tests and data processing. The research hypothesis testing was carried out by using the Structural Equation Model (SEM) approach based on Partial Least Square (PLS). The population used in this study is vocational schools’ teachers in Pati Central Java, Indonesia. The number of respondents in this study is 110 respondents of vocational teachers who have worked at least 1 years in their schools, data obtained from the distribution of online questionnaires with snowball sampling method. Based on the results of hypothesis testing data processing using SmartPLS software, the results obtained that job satisfaction, motivation, job satisfaction, transformational leadership, work environment has a positive and significant effect on teachers’ performance of vocational schools.

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Analysis of groundwater potential and well discharge to determine of optimal irrigation area, case study: Data watershed, Wajo regency, South Sulawesi province, Indonesia

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AIP Conference Proceedings 2023年第1期2596卷

作者： Suhardi Ahmad Munir Muhammad Tahir Sapsal Agricultural Engineering Study Program Faculty of Agriculture Universitas Hasanuddin Jl. P. Kemerdekaan km 10 Tamalanrea Makassar 90245 Indonesia

Groundwater use for irrigation requires high costs because it requires additional charges in digging wells, pumping units, and operators. In addition, the water flow that can be taken was limited according to the groundwater potential and pump capacity. Therefore, the critical information before pumping groundwater for irrigation is to know the potential of groundwater. Groundwater potential can be predicted based on aquifer description and saturated hydraulic conductivity with pumping test. The data was used to determine groundwater discharge as groundwater potential at the research site as a basis for determining the area that can be irrigated. The research was conducted by interpreting lithological data to determine the description of the aquifer, conducting continuous pumping tests to determine the saturated hydraulic conductivity of the aquifer, determining the groundwater potential using Darcy's approach, and determining the optimal area that can be irrigated based on the groundwater potential and groundwater needs of rice. The results showed that the hydraulic conductivity of the aquifer was 16.30 m/d which indicated that the aquifer was sandy. The groundwater potential in the study area is about 509.38 l/s, can irrigate rice fields of 489.79 ha, and for one well, it can irrigate about 1.5 ha in conditions without rain.

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Perception of the community on the use of biogas as alternative energy (Case study: Jetak Village, Getasan sub district)

Perception of the community on the use of biogas as alternat...

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Life and Environmental Sciences Academics Forum 2018, LEAF 2018

作者： Putri, A. Purwanto Purnaweni, H. Study Program of Environmental Science School of Postgraduate Studies Diponegoro University Semarang Indonesia Faculty of Mathematics and Natural Sciences Semarang State University Semarang Indonesia Faculty of Chemical Engineering Diponegoro University Semarang Indonesia Faculty of Social Science and Political Science Diponegoro University Semarang Indonesia

The purpose of this research is to know public perception of biogas users in Jetak Village, Semarang Regency viewed from technological aspect, technical (biogas installation), biogas benefit, economy and environment. The method used qualitative descriptive with qualitative descriptive approach. The technique of determining key informants was done by purposive sampling. Data were obtained from cattle ranchers who lived in the study sites through interviews, observation and documentation. The result of this research is overall the perception about biogas energy get a positive response from user society. However, there are some things that should be considered for the government and others in providing assistance that is necessary to consider the evaluation and monitoring periodically so that the constraints experienced by the user community can be known early and can be found right solutions. In addition, the sustainability of the use of biogas energy can be done from generation to generation not just the aid which in the end becomes only useless materials. © 2020 IOP Publishing Ltd. All rights reserved.

关键词： Biogas

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