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Muhammad Nizar
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Fakultas Teknik, Universitas Serambi Mekkah Jalan Unmuha, Batoh, Telp. (0651) 26160 dan (0651) 22471 Banda Aceh, Indonesia
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INDONESIA
Serambi Engineering
Published by Universitas Serambi Mekkah Aceh
ISSN : 25283561     EISSN : 25411934     DOI : http://doi.org/10.32672/jse
Core Subject : Science, Social, Engineering,
Earth & Planetary Sciences Energy Engineering Environmental Science Industrial & Manufacturing Engineering
The Serambi Engineering journal is published as a medium to distribute information on research results in engineering and science, both carried out by lecturers from the Serambi Mekkah University and other parties. Published research can be in the form of field research or laboratory research as well as a literature review. This journal is published four times yearly, namely January, April, July, and October. Editors accept manuscripts from lecturers, researchers, students, and practitioners that have never been published by any other media. Manuscripts submitted will be evaluated and edited for uniformity of format, terms, and other procedures. The topics that can be published but are not limited to are: Water & Waste Water Quality Solid Waste Management Air Pollution Control Environmental Health Environmental Modeling Environmental Management Water Resources Management Occupational Health & Safety Ecology Renewable Energy Circular Economics Sustainable Development Climate Change Mitigation and Adaptation Climate Change and Water Resources Adaptation Urban Planning Informatics Computer and Technology Industrial Engineering Other .
Arjuna Subject : Ilmu Lingkungan (semua ketegori) - Teknik Lingkungan
Articles 964 Documents
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Perbandingan Kecepatan Perahu 1 GT Menggunakan Propeller Dua Daun dan Tiga Daun Pada System Water Jet Ikhsan, Muhammad; B, Siswandi; Jupri; Efrizal; Muhammad Ryan Saputra; Bima Kurniawan
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Indonesia, as an archipelagic country with extensive marine areas, relies on small vessels as the main means of transportation for coastal communities; therefore, an efficient, safe, and suitable propulsion system for shallow waters is required. This study aims to analyze the effect of the number of propeller blades on the speed of a 1 GT boat equipped with a water jet propulsion system. An experimental method was applied by conducting speed tests in shallow waters using a 4-inch diameter water jet and a 7 HP Rubin engine. The tests were carried out using two-blade and three-blade propellers, each tested four times on the same boat, engine, and location. Primary data were obtained from direct testing and speed measurements, while secondary data included engine specifications, 1 GT boat characteristics, and water jet design data. The analysis was conducted using descriptive and comparative methods. The results show that the three-blade propeller produced a higher average speed of 4.88 knots compared to 4.13 knots for the two-blade propeller. The maximum speed achieved by the three-blade propeller was 5.3 knots, while the two-blade propeller reached 4.4 knots. These results indicate that the three-blade propeller generates greater thrust, making it more effective for improving the speed of small boats using water jet systems in shallow waters.
Analisis Efektivitas IPAL Produksi Industri PT. X di Sidoarjo  dalam Menurunkan Beban Pencemar pada Air Limbah Industri. Budi Samodra, Mula Rangga; Fadhil, Muhammad Faisal
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The animal feed industry generates wastewater from boiler operations, vehicle disinfection activities, and laboratory processes. Wastewater from these sources contains TDS, TSS, pH, ammonia, fluoride, Biochemical Oxygen Demand (BOD), and Chemical Oxygen Demand (COD), which have the potential to pollute the environment. PT X, as one of the animal feed industries, operates a Wastewater Treatment Plant (WWTP) to ensure that the discharged wastewater complies with applicable regulations and is therefore environmentally safe. This study aims to evaluate the effectiveness of the WWTP at PT X using a quantitative method with descriptive analysis. The results indicate that the WWTP at PT X is still operating effectively in reducing most pollutant parameters. However, for one parameter, fluoride, the removal performance is only at a “moderately effective” level. Therefore, to improve the effectiveness of fluoride removal, one recommended approach is to replace the flow system of the coagulant and flocculant dosing tank with a dosing pump. Dosing pumps provide a more stable and effective delivery of coagulants and flocculants.
Understanding Material Allowance as a Systemic Issue in Garment Manufacturing: An Activity-on-Arrow Case Study Elvi Armadani; Ragil Alghifari Sendin; Chindy Elsanna Revadi; Arieviana Ayu Laksmi; Alek Topan Lubis; Hilmana Radhia Putera
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The garment manufacturing industry is required to maintain high production efficiency while meeting strict buyer specifications, particularly in make-to-order export-oriented operations. One recurring challenge in garment production is material allowance, which refers to excess material usage beyond planned requirements and may increase production costs while reducing resource efficiency. This study aims to analyze production business processes and identify factors contributing to material allowance in the manufacturing of Tommy Hilfiger products at PT XYZ, an export-oriented garment company in Indonesia. This research adopts a descriptive qualitative approach by applying the Activity-on-Arrow (AOA) method to map activity sequences and interdepartmental relationships across the production workflow. Primary data were collected through direct observation and semi-structured interviews, while secondary data were obtained from internal company documents and material usage records. Quantitative analysis of raw material consumption was conducted across three production seasons—Fall 2021, Pre-Spring 2022, and Spring 2022. A fishbone diagram was used to analyze the root causes of material allowance. The results show that material allowance consistently occurred at approximately 2% across all observed production seasons. AOA-based analysis identifies cutting and sewing processes as critical stages where rework and quality deviations frequently arise. Human-related factors and method-related issues were found to be the primary contributors to material allowance. These findings highlight the importance of improving process coordination, quality control, and operator management to reduce material allowance and enhance production efficiency.
Analisis Uji Kuat Tekan Beton Dengan Perendaman Air dari Daerah Gambut Apria Brita Pandohop Gawei; Okta Meilawaty; Stephanus Alexsander; Alphario Raymond
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The quality of concrete is greatly influenced by the compressive strength obtained after mixing and curing the test specimens. One important factor in making concrete is the quality of the water used, including its acidity level (pH). Water from peat areas, although abundant, generally has a pH below 7, thus affecting the quality of concrete. This study uses a quantitative descriptive approach to determine the effect of low pH water (5.51) as curing water on the compressive strength of concrete with a planned quality of 23 Mpa. Concrete curing was carried out and tested at the ages of 7, 28, and 90 days. The results show that the average compressive strength of concrete at the age of 7 days obtained a compressive strength of 11.0 Mpa, at the age of 28 days the average increased significantly to 18.4 Mpa, but decreased at the age of 90 days with an average compressive strength of 14.1 Mpa. These findings confirm that the use of water with a low pH as a curing water can also significantly reduce the quality of concrete, so special attention is needed in the selection of water used.
Perancangan Sistem Informasi Maintenance dan Monitoring Mesin Produksi Berbasiskan Design Thinking Approach pada Perusahaan Busa Poliuretan Putrika Dewi, Rezayanti Novia
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The rapid development of information technology in Indonesia has driven improvements in efficiency and effectiveness across various industrial sectors, including manufacturing. One of the major challenges frequently encountered in the manufacturing industry is unplanned downtime of production machines, which leads to decreased productivity and increased operational costs. at PT Anugrah Cemerlang Abadi, downtime management is still conducted manually, resulting in the unavailability of timely and accurate information regarding machine conditions. This study aims to design an information system for controlling unplanned downtime based on a Computerized Maintenance Management System (CMMS) to support digital recording, real-time monitoring, and the management of machine and spare parts data. The research adopts the Design Thinking approach proposed consists of five stages: empathize, define, ideate, prototype, and test. System evaluation was conducted using usability testing with the System Usability Scale (SUS) method involving 50 respondents. The results show that the system achieved a SUS score of 89.7, which falls into the Grade A category, is classified as Best Imaginable and Acceptable, and is positioned within the 80th–90th percentile. These findings indicate that the proposed information system demonstrates excellent usability and is suitable for supporting the control of unplanned downtime and enhancing production efficiency within the company.
Analysis of Factors Causing Delays in Ballast Pump Repair Using the Kaiser-Meyer-Olkin and RCA Methods at KM XXX at PT XYZ Febian Rizky Purnama; Mega Cattleya PA Islami
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The shipping sector is a crucial element in a nation's shipping operations, particularly in ensuring the optimal performance of essential components such as ballast pumps. However, the repair time for the ballast pumps on the KM XXX ship at the PT XYZ shipyard often exceeds the initial estimate (seven working days), resulting in financial losses and increased waiting time for the ship at port. This study is designed to identify the main determinants behind the delays in ballast pump repairs and formulate strategic recommendations to optimize maintenance effectiveness. The analytical methods applied include Kaiser-Meyer-Olkin (KMO) for factor analysis and Root Cause Analysis (RCA) supplemented by a Fishbone Diagram to determine the root cause of a problem. By determining the main factors and root causes, this study presents detailed and systematic improvement recommendations. These recommendations are designed to optimize the effectiveness of ballast pump maintenance and mitigate adverse consequences on ship operational performance.
Production Optimization Analysis Based on Effective Working Hour of Mobile Crusher Unit 02: Case Study in PT Mifa Bersaudara, West Aceh Oziana, Deea Rizki; Syafitri Amanda; Nurul Aflah; Pocut Nurul Alam; Nurul Kamal
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

PT Mifa Bersaudara is a coal mining company located in Meureubo, West Aceh, Indonesia. This study evaluates and optimizes the Effective Working Hours (EWH) of Mobile Crusher 02 (MC02), one of the key units in the coal crushing process. The primary constraint identified is the inability to achieve production targets due to excessive downtime, particularly standby time and equipment breakdowns, which significantly reduce operational efficiency. A quantitative descriptive approach was applied using primary field observations and secondary production data from May to June 2025. The analysis focused on downtime components, effective working hours, and equipment availability based on Mechanical Availability (MA), Physical Availability (PA), Utilization of Availability (UA), and Effective Utilization (EU). Results indicate that MC02 operated for an average of only 7 effective working hours out of 10.05 available hours, reflecting an efficiency level of 69.65%. Standby time accounted for the largest portion of downtime at 141.86 hours. Following the implementation of operational improvements aimed at reducing delays, overall efficiency increased, and production rose from 128,505 tons to 168,864 tons, achieving 112% of the targeted output. These findings demonstrate that improving EWH has a direct and significant impact on crusher productivity and provides a foundation for future operational optimization in the coal processing system.
Penilaian Kinerja Pengelolaan Limbah B3 di PT. X Sabandar, Gilberth Frankrin; Nurvita Cundaningsih
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The management of hazardous and toxic waste requires compliance with technical requirements in order to prevent pollution and health hazards. This study was conducted to assess the level of compliance of B3 waste management at PT X through four main aspects, namely containment, sorting, facilities, and transportation, based on the provisions of the Minister of Environment and Forestry Regulation No. 9 of 2024, Permen LHK No. 6 of 2021, Permenhub No. 60 of 2019, and Permen LHK No. 1 of 2021. The research methods included direct observation at the location, interviews with relevant personnel, documentation of field conditions, and assessment of indicators using the Guttman method to measure compliance with technical requirements. The results of the study show that the facility aspect has a high level of compliance, namely 100%, because the safety facilities for evacuation route, ventilation, and storage buildings have met the standards. The transportation aspect scored 85% with the fulfilment of permit documents and the use of authorized third parties, although improvements are still needed in the physical condition of vehicles and container labelling. The sorting aspect achieved 50% because it was not fully carried out based on hazard characteristics. Containment was the lowest aspect with a score of 30% due to the use of non-waterproof containers without hazard symbols. Overall, the compliance rate of 66.25% indicates the need for significant improvement in the initial stages of management to achieve safe, effective, and regulatory-compliant hazardous waste management.
Analisis Potensi Pemanfaatan Kualitas Air Hujan Untuk Penggunaan Non-potable Water di Kampus Universitas Andalas Ermaningsih; Nur, Ansiha; Komala, Puti Sri
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The high demand water for sanitation purposes in Engineering Faculty, Andalas University, particularly for toilet flushing systems, has not been balanced by utilization of sustainable alternative water sources. Therefore, this study aims to evaluate feasibility of rainwater quality as non-potable water source planned for implementation in the buildings of Engineering Faculty, Andalas University. The feasibility assessment refers to Regulation of Health Minister of Republic of Indonesia Number 2 of 2023. Rainwater samples collected directly from building roof downpipes, with three repetitions at the same location. The parameters of pH, dissolved oxygen (DO), and temperature were measured in situ using Lutron DO-5510 dissolved oxygen meter and portable pH meter, while turbidity, BOD, COD, TSS, and total coliform were analyzed at Environmental Engineering Department Laboratory of Andalas University using standard methods based on SNI 6989.57:2008 and US EPA Method 1699. The results indicate that pH, DO, temperature, BOD, COD, TSS, and turbidity comply with the established quality standards, whereas total coliform levels exceed the permissible limit. The presence of total coliform is presumably due to contamination from bird droppings on roof surfaces, particularly in areas surrounded by vegetation.
Perencanaan Ulang Sistem Drainase Menggunakan SWMM 5.2 di Kecamatan Bojongloa Kidul, Kota Bandung Zeihan Niswanurrahim
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Bojongloa Kidul District is a low-lying area crossed by a river, making it prone to flooding. Flooding occurs due to rainwater overflowing drainage channels that cannot be accommodated by the Citepus River. The purpose of this plan is to redesign the drainage system in Bojongloa Kidul Subdistrict and provide solutions and recommendations for flooding and waterlogging problems using the SWMM 5.2 application. The planning was carried out in Cibaduyut Kidul and Cibaduyut Wetan villages as priority areas for flood management based on the scoring results of the Minister of Public Works and Public Housing Regulation No. 12 of 2014 concerning The Implementation Of Urban Drainage Infrastructure. Based on the evaluation results, there are problematic channel segments on Jalan Terusan Cibaduyut -Cibaduyut Tunnel, namely flooding at junctions J19, J23, J29, and J30 which are marked in red in the SWMM 5.2 simulation, thus affecting the entire route to outlet 2, outlet 3, outlet 4, outlet 6, and outfall 2, with a runoff flow rate of 21.73 m³/s. Channel dimension improvements were carried out by increasing the channel depth to ensure sufficient capacity.

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