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Total Environment engineering 2025年 2卷

作者： Yudha Gusti Wibowo Hana Safitri Dedy Anwar Arif Rohman Anis Tatik Maryani Sudibyo Sudibyo Setyo Budi Kurniawan Ahmad Tawfiequrahman Yuliansyah Himawan Tri Bayu Murti Petrus Department of Mining Engineering Institut Teknologi Sumatera Jalan Terusan Ryacudu Way Hui Kecamatan Jati Agung Lampung Selatan 35365 Indonesia Center for Green and Sustainable Materials Institut Teknologi Sumatera Jalan Terusan Ryacudu Way Hui Kecamatan Jati Agung Lampung Selatan 35365 Indonesia Department of Chemical Engineering Universitas Gadjah Mada Daerah Istimewa Yogyakarta 55284 Indonesia Department of Geomatic Engineering Institut Teknologi Sumatera Jalan Terusan Ryacudu Way Hui Kecamatan Jati Agung Lampung Selatan 35365 Indonesia Agroecotechnology Study Program Faculty of Agriculture Universitas Jambi Jambi Indonesia Research Center for Mining Technology Badan Riset Inovasi Nasional Tanjung Bintang Lampung Indonesia Department of Chemical and Process Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysias

Acid Mine Drainage (AMD) poses significant environmental challenges to water resource management. This review explores the potential of waste materials in developing nanocomposites for AMD treatment. The study highlights the benefits of using agricultural residues, industrial byproducts, and municipal solid waste as components in nanocomposites. These waste-based nanocomposites offer cost-effectiveness, resource conservation, and transformation of waste into valuable assets. The mechanisms of pollutant removal, recent trends, and advancements in nanocomposites for AMD treatment are discussed. Unlike previous studies, this work provides a pioneering comprehensive assessment of waste-derived nanocomposites, systematically synthesizing state-of-the-art advancements while critically evaluating their practical application and ecological impact. Recommendations for optimizing nanocomposites include material selection, property tailoring, and field implementation. Future research directions are proposed, such as advanced characterization techniques, novel waste material exploration, and ecological impact evaluation. Harnessing waste material potential can promote sustainable water and waste management, restoring AMD-affected environments and protecting water resources.

关键词： Acid mine drainage Adsorption Nanocomposites Water pollution Wastewater treatment

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Development of interactive CD media on processing of continental pastry

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IOP Conference Series: Materials Science and engineering 2021年第5期1098卷

作者： R Rusilanti S Sachriani Y Yulianti M Mutiara Culinary Arts Vocational Education Study Program Faculty of Engineering Universitas Negeri Jakarta Jalan Rawamangun Muka 13220 East Jakarta Indonesia Food Service Industry Study Program Faculty of Engineering Universitas Negeri Jakarta Jalan Rawamangun Muka 13220 East Jakarta Indonesia

The purpose of this research was to produce an interactive CD media on the processing of continental pastry to improve the quality of learning in continental and culinary courses. The quality of media feasibility is based on the assessment of media experts who consider the criteria 'good,' with the percentage criteria earned at 77.5%. The evaluation of media experts who review the rules 'excellent' has a value of 90%. This media can be considered 'feasible' as it can be used for learning in terms of media and technical aspects.

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Reducing defects in Mile line Of Rolling Plate Departement Using Six Sigma Method

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Journal of Physics: Conference Series 2020年第2期1477卷

作者： Erni Krisnaningsih Andreas Tri Panudju Ikhwanul Pratama Industrial Engineering Study Program Engineering Faculty Universitas Banten Jaya Serang Indonesia Industrial Engineering Study Program Engineering FacultyUniversitas Bina Bangsa

PT. Krakatau Posco is steel company that produces steel and distributes its products both for national and international market. PT. Krakatau Posco produces slabs and plates steel. In meeting the requirements of the markets, the high-quality products are a necessary, thus the company should improve their product quality by reducing defects. The purpose of this study is to identify product defects and to determine the factors that cause during the production process, to propose corrective actions to reduce the number of defects. This research was conducted at Mill Line on Plate Rolling Department PT. Krakatau Posco. The research uses the Six Sigma method. Following the Six Sigma method, the result of DPMO is 568 with δ value is 4.87 which is still under the world target which is 6δ (3.4 DPMO). Proposals steps for improving the quality of plate products are doing routine maintenance and repairing of the machine, checking engine calibration conditions, improving the quality of slab material, heating slab time > 180 minutes, setting parameters (thickness, width, and length) as specified, and checking the straightness of the product plate during the rolling process (camber correction). A post-publication change was made to this article on 20 Apr 2020 as an incorrect version was published.

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Simulation and study of Shell and Tube Type Heat Exchangers

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IOP Conference Series: Materials Science and engineering 2020年第1期1007卷

作者： Andriawan Harto Tanujaya Abrar Riza Mechanical Engineering Study Program Faculty of Engineering Universitas Tarumanagara

Design of the shell and tube heat exchanger using comsol multipyhiscs application. The calculation of the dimensions of the heat exchanger aims to determine the quality of the heat exchanger based on the overall heat transfer coefficient, impurity factor, and the pressure drop that will occur. The heat exchanger that is made and designed is a shell and tube type heat exchanger 1 (one) pass shell and 1 (one) pass tube made of stainless steel 304 and copper with fluid flow in the form of air and water. The analysis results obtained that the heat exchanger that is designed already meets the requirements of the effectiveness coefficient of the baffle, understands the factors that exist in the shell and tube type of heat exchanger and understands the factors that affect efficiency and *** using the LMTD method, obtained that receive heat released has a large unity with time Q, then the heat received by cold fluid is Q = 4565.16 W, LMTD produced also shows the number 20, with a proven factor (F) is 1. Reynolds Number of the tube side is greater than shell side.

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Developing the Indonesian Qualifications Framework's descriptors for Electrical engineering as the basis of the Recognition of Prior Learning (RPL)

Developing the Indonesian Qualifications Framework's descrip...

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International Conference on Electrical, Electronic, informatics and Vocational Education 2018, ICE-ELINVO 2018

作者： Zamtinah Supriyadi, E. Electrical Engineering Education Study Program Faculty of Engineering Yogyakarta State University Indonesia

This study aims to: 1) describe the mechanism of the level 2 IQF (the Indonesian Qualifications Framework) descriptor development for electrical engineering, and 2) formulate a set of detailed-level-2 descriptors for electrical engineering. The method used to develop the descriptors is brainstorming between the researcher and several experts from both academicians and practitioners. Meanwhile, the method to formulate the IQF descriptors for electrical engineering is literature review referring to The Indonesian National Work Competency Standard (SKKNI) and focus group discussion involving experts from academicians, Professional Certification Institute Gema PDKB, the Association of Indonesian Electrical Works (APEI), Consortium for Electrical Installation Safety (KONSUIL), and industry practitioners such as PT. LEN Bandung, PT. Bukaka Teknik Utama, PT. Schneider Electric Indonesia, and PT. Smart Energi Semesta. The descriptors are in the form of the guttman scale questionnaire. The questionnaire was then tested on limited-scale respondents. The KR 20 method was employed to examine the reliability and resulted in r11 = 0.9;thus, the guttman scale questionnaire was considered "very reliable". The respondents consisted of 8 academicians, 8 electrical engineering teachers at vocational high schools, and 8 industrial practitioners. The collected data were then analyzed descriptively. This study resulted in a set of level 2 IQF descriptors which were designed according to the taxonomy of electricity system, namely electric power transmission system descriptors, electric power distribution system descriptors, and electric power utilization descriptors. In regard to electric power transmission system, 103 out of 154 (67%) descriptors were approved by more than 80% of respondents;for electric power distribution system, 83 descriptors (75%) were approved by more than 80% of respondents;and for electric power utilization system, 61 descriptors (94%) were approved by more than 8

关键词： Surveys

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Activated carbon characteristics of tabah bamboo that physically activated under different activation time 1

Activated carbon characteristics of tabah bamboo that physic...

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1st International Conference on Design, Energy, Materials and Manufacture, ICDEMM 2018

作者： Negara, D.N.K.P. Nindhia, T.G.T. Surata, I.W. Sucipta, M. Hidajat, F. Doctoral Study Program of Engineering Science Faculty of Engineering Udayana University Kampus Sudirman Denpasar-Bali Indonesia Mechanical Engineering Department Udayana University Street of Bukit Jimbaran Bali Badung Indonesia PPPTMGB Lemigas Jl. Ciledug Raya Kav. 109 Jakarta Selatan12230 Indonesia

Activated carbon is a versatile porous material that widely applied to purify, deodorize, decolorize, remove or reduce some gases harmful constituents and storage of gas. For different application different characteristics of activated carbon is required. This paper concerns to find out the characteristics of activated carbons derived from tabah bamboo (Gigantochloc nigrociliata) that physically activated with different activation holding time. Prepared tabah bamboo was carbonized by heating up to the temperature of 800 °C for two hours. The char produced was powdered and then activated physically by heating up to 800 °C, soaked at that temperature during each 1, 1.5 and 2 hours under 100 mL/min N2 flow. Activated carbons manufactured were characterized by proximate and ultimate analyses and SEM observation. The results show that the highest fix carbon (82.52%) and lowest ash (5.91 %) was obtained at 1 hour soaking time with moisture and volatile contents were 3.56% and 8.00 % respectively;the highest carbon (C) content of 84.16 % was yielded at soaked time of 1.5 hours;SEM observation shows that there were significant differences of morphology structure between raw material and activated carbons for all of the soaking time variations. The pores structures have been formed in the activated carbons produced. © Published under licence by IOP Publishing Ltd.

关键词： Activated carbon

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Design of big data technology prototype for classification of village status based on village development index involves k-means algorithm to support village ministry Pdtt work programs

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Journal of Physics: Conference Series 2021年第1期1811卷

作者： Paska Marto Hasugian Harvei Desmon Hutahaean Bosker Sinaga Sriadhi Saronom Silaban Informatics Engineering Study Program STMIK Pelita Nusantara Medan Indonesia Computer Science and Informatics Education Study Program Faculty of Engineering Universitas Negeri Medan Medan 20221 Indonesia Departement of chemistry Universitas Negeri Medan Medan 20221 Indonesia

Big data technology is the overall technology that can handle the processing associated with analyzing the data to explore the potential that is in it. Some of the uses of big data are based on the biggest data traffic sources, such as social media, financial transactions, public data, censorship data, and company data. The problem found in the accumulation of village status data that has not been utilized in the decision-making process to determine the status of the next village and the absence of an application to process the data stored in the data database so that a tool is developed to analyze the buildup. The results of this study are to produce a prototype design that is Unified Modeling Language (UML) design, Form Design, and Database Design that will be used to develop Big Data Technology in determining the classification of village status based on the Village Build index.

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Review the Utilization of Big Data and K-Means Algorithm in Supporting The Determination of Village Status As Support To The Ministry of Village PDTT

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Journal of Physics: Conference Series 2021年第1期1811卷

Big data refers to big data, fast data processing, diversity of data structures, and data values so that it is not possible to be processed with outdated methods. Big data technology is used in various industrial sectors. Big data technology is the whole technology that can handle Big Data. Some of the uses of big data are based on the largest significant data traffic sources such as social media, financial transactions, public data, sensor data, and corporate data. The same is the case with the status of so many villages in Indonesia, so it is better to use big data for the classification of village status based on the village index build by involving an algorithm process. This research aims to produce a description of the role of big data in supporting activities in a grouping. The method used is a qualitative approach related to data collection based on scientific work with the source of data information needed to study literature techniques from various studies that have been published in national and international journals. A decision is made that big data has been widely used in different circles to facilitate performance and speed up the decision-making process.

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The effect of artificial age time on crystal size, dislocation density, hardness and micro structure on Al 6061 materials alloy

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AIP Conference Proceedings 2021年第1期2342卷

作者： Budiarto Susilo Ulung Sanjaya 1Mechanical Engineering Study Program Faculty of Engineering Universitas Kristen Indonesia Jakarta Indonesia 2Electrical Engineering Study Program Faculty of Engineering Universitas Kristen Indonesia Jakarta Jl. Mayjen Sutoyo no.2 Cawang Kramat Jati Jakarta 13630 Indonesia 3Fields of Balmetsenpi Puslabfor Police Headquarters Jakarta Indonesia

Research on the effect of T6 heat treatment and artificial life time on crystal size, density dislocation, hardness, and microstructure of Al 6061 alloy material made from powder metallurgy. The T6 heat treatment starts with a solid solution which is heated at 530 ° C, held for 60 minutes, then quenching into the water media, and the artificial aging process at 200 ° C and variations in the holding time of 1h, 24h, and 30h. Crystal size, dislocation density and lattice microstructure testing using X-ray diffractometer, hardness testing with Vickers scale and surface microstructure with SEM-EDX. Test results of crystal size, dislocation density, and micro lattice strain on 4 phase α-Al at the miller index plane (111), (200), (220), and (311) show that the crystal size increases with the duration of heating time of artificial aging. While dislocation density and micro lattice strain increase over a heating period of 1h to 30h, dislocation density and lattice strain decrease at the Miller index plane (111) to (311). The hardness testing of Al 6061 as-cast material was 54 HV after quenching the water hardness value of 75 HV, but after artificial aging the hardness decreased with a longer holding time from 45.50 HV to 39.95 HV. Microstructure observations with SEM-EDX, showed that the Al 6061 test sample without heat treatment showed a dominant α-Al matrix, whereas in the Al 6061 sample after the T6 process it was seen that the Mg2Si phase functioned to harden the Al 6061 alloy.

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study of Utilization Plastic Waste as Basic Material for Boat Manufacturing Using Eco-green Design Concept

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IOP Conference Series: Materials Science and engineering 2021年第1期1125卷

作者： S Noverdo N Iswadi R Reda S Bambang P. Muayyad Studi Program Naval Architecture Faculty of Engineering Universitas Pembangunan Nasional Veteran Jakarta Indonesia Study Program Industrial Engineering Faculty of Engineering Universitas Pembangunan Nasional Veteran Jakarta Indonesia Naval Architecture & Ship Builder-PT Venta Technology Industri Jakarta Indonesia

The plastic waste problem has become a global problem and the effect on the environment is horrible. Almost all countries make an effort to reduce their daily utilization. Environmental organizations and researchers are also performing research to find ways to recycle plastic waste. In this paper introduces the 'Eco-green Design Concept' to utilize plastic waste (type 2) as fishing boat material. This concept will recycle 3 tonnes of plastic waste into the material of a fishing boat. In addition, the implementation element of eco-green design concept (design quality (D), Environmental Friendly (E), Eco-green Material (G)) into the design of fishing vessels has been successful. The concept does not only utilize type 2 plastic waste into the hull of the ship, but the design of the ship is made to have small resistance, good stability and has a large cargo area. And also has a machine that is environmentally friendly and does not cause pollution.

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