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Muhammad Nizar
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muhammad.nizar@serambimekkah.ac.id
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serambiengineering@serambimekkah.ac.id
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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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Review of Problem Tooling Breakdown Fixes at the Op10 Part Panel Anniversary, RR W/House Inn, RR L/R (RH) at Pt. Summit Adyawinsa Indonesia Tiara Wijaya, Elika; Herwanto, Dene; Rabbani Sumitra, Naufal
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Anniversary damage in the stamping process is a critical problem that can affect product quality and hinder smooth production in the automotive industry. This study aims to identify the main cause of damage to the OP10 Anniversary of the RR W/House Inn RR L/R (RH) at PT. Adyawinsa Indonesia Summit and formulate the right improvement steps to reduce the frequency of breakdowns. The research uses a case study approach through direct observation, structured interviews with Maintenance Tooling personnel, as well as analysis of OEE data and damage history for the period June–December 2024. The data were analyzed using the Root Cause Analysis method (Fishbone Diagram and 5 Why) as well as technical evaluation on the insert dies component. The results showed that scratch defects  in parts were caused by damage to the blank holder insert in the form of pin holes and peeling hardchrome layers, which was exacerbated by less effective preventive maintenance and technical inspections that were only visual. This condition caused 39 breakdown events with a total downtime of 41 hours. Repair recommendations are carried out through insert redesign, precision machining, hardening process, re-hard chrome, and improvement of inspection flow and tooling monitoring. In conclusion, improving the quality of inserts and strengthening the preventive maintenance system has been proven to be able to reduce the potential for repeated damage and increase the reliability of the stamping process.
Pengolahan Air Tanah Dalam Menurunkan Bakteri Coliform Dengan Metode Mikrofiltrasi Dengan Media Membran Keramik Fawaz, Hammam; Firra Rosariawari; Praditya S. Ardisty Sitogasa
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Groundwater treatment to reduce Coliform Bacteria levels generally still uses chlorine chemicals. Although effective, on the other hand, chlorine chemicals cause another problem, namely residual chlorine which is harmful to health if the treated water is used directly. Therefore, ceramic membranes can be used as an alternative to degrade Coliform Bacteria levels without causing side effects. The materials used as components of the ceramic membrane are clay, zeolite and coconut shell charcoal, with 3 groups of composition comparisons and 2 types of thickness. This research is experimental by carrying out a simple filtration process using a tube continuously, within an operating period of 8 hours. This study aims to analyze the effect of variations in the composition and thickness of the ceramic membrane on its performance used as filtration. The results of the filtration process show that the variation in the composition of the membrane 50%:25%:25% with a thickness of 2.5 cm has the highest reduction efficiency reaching 95.88%. This ceramic membrane variation has the least mixture of coconut charcoal. The study revealed that the mixture of additives in the form of coconut charcoal and membrane thickness play an important role in pore formation. The more clay and coconut shell charcoal are mixed and the thicker the membrane is made, the more the ceramic membrane's ability to reduce water pollutant levels will increase.
Pengaruh Fermentasi Terhadap Kelimpahan Lactobacillus sp. Dalam Probiotik Limbah Cair Tahu Hidayat, Fajar; Raden Kokoh Haryo Putro
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Tofu wastewater is a liquid waste with high organic content that has the potential to be recycled. This study aims to analyze the effect of substrate composition and fermentation time using EM4 starter on the abundance of Lactobacillus sp. as a key parameter of probiotic quality. The study used a Completely Randomized Design (CRD) with four composition treatments: P1 (30% TWW : 30% water : 40% EM4), P2 (40% TWW : 20% water : 40% EM4), P3 (50% TWW : 10% water : 40% EM4), and P4 (60% TWW : 0% water : 40% EM4). Fermentation was observed for 18 days. The results showed that composition and fermentation time significantly affected bacterial abundance. The highest abundance was achieved in P4 on day 14 (7.0 × 10⁶ CFU/mL). However, the most efficient composition was P1, which produced a high abundance of Lactobacillus sp. (4.1 × 10⁶ CFU/mL) and successfully reduced BOD₅ levels to 108.45 mg/L, below the quality standard. The optimal fermentation time was 14 days, after which the population declined. It was concluded that the fermentation of tofu wastewater with the right composition and time can produce qualified probiotics while reducing environmental pollution.
Degradasi Zat Warna Tekstil Remazol Orange 3R Menggunakan Metode Elektrokoagulasi dengan Elektroda Logam Besi Suseno; Petrus Darmawan; Yari Mukti Wibowo
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Removal of dyes from textile industrial wastewater can be done using microbiological, physical and physicochemical methods. These methods have weaknesses, namely they are less effective, expensive and require further treatment. One alternative method for removing dyes from textile industry wastewater is the electrochemical method, which can be done more quickly, cheaply and effectively. This study aims to determine the effectiveness of electrochemical methods, especially electrocoagulation, in removing dyes, especially Remazol Orange 3R dyes used in the textile industry. The degradation of the textile dye Remazol Orange 3R in this study was carried out using the electrocoagulation method using iron metal electrodes. The equipment used in this study included a plastic vessel, an electric stirrer, and anodes and cathodes made of ferrous metal. The degradation process of the Remazol Orange 3R textile dye was carried out using a batch system with varying stirring or contact times of 15, 30, 45, and 60 minutes. The percentage decrease in absorbance of the dye solution was measured using a UV-Vis spectrophotometer at the maximum wavelength. The results of the study showed that the highest percentage of absorbance reduction, namely 98.36%, was at a contact time of 30 minutes. It can be concluded that the electrocoagulation method with iron electrodes has the potential to be used as a wastewater treatment option, to degrade dyes from textile industry wastewater.
Penentuan Prioritas Strategi untuk Meningkatkan Kinerja Layanan Bank Sampah X Menggunakan Metode Analytical Hierarchy Process (AHP) Fely Eka Sonia; Rizki Andre Handika; Winny Laura Christina Hutagalung
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The waste management problem in Indonesia, especially in Sungai Penuh City remains a complex and ongoing challenge. The increasing population causes a continuous rise in waste volume, negatively impacting environmental quality and community activities. The x waste bank was established as an initiative to enhance education and community involvement in waste management and recycling with the goal of creating a clean, healthy and comfortable environment in Sungai Penuh City. This study shows that the composition of inorganic waste bank at X waste bank varies, including plastic, paper, metal and other types of waste. Each type of waste exhibits different generation patterns each month. Paper waste is the largest contributor, accounting for 69% of the total waste collected from January to June. Next is plastic waste, the second largest contributor at 15%. The remaining two types, metal waste and other waste, have relatively smaller proportions amounting to 8% of the total. Additionally, one point to emphasize is the need to increase the service performance at X waste bank and new facilities that are currently unavailable, to encourage more residents of Sungai Penuh City. Based on the ranking results calculated using the Analytical Hierarchy Process (AHP) methode, there is one point that needs to be emphasized in order to improve service performance at Waste Bank X, namely by adding new facilities that are not yet available.
Studi Eksperimental Tentang Kondisi Ekstrem Pelat Beton Bersirip di Atas Tanah Pasir Luckianto, Marvin; Vivi Bachtiar; M. Yusuf
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Roads are a crucial land transportation infrastructure that play an essential role in the distribution of goods and services. The existence of this infrastructure is vital for regional economic development. With the presence of roads, especially those prioritized for motor vehicles, travel time to destinations can be significantly reduced. The deflection of concrete pavement occurs due to loads acting on its surface. Therefore, the concrete slab or pavement must be designed with sufficient strength and an effective thickness. This study aims to analyze the effect of load position variation on the deflection of finned concrete slabs to determine the most critical (extreme) point. The research was conducted experimentally using an indirect loading method. The sample used was a finned concrete slab with a fin inclination of 30°, subjected to loading at the mid-point of the non-finned side, the mid-point of the finned side, and the corner of the finned concrete slab. Based on the loading test and graphical analysis, the slab loaded at the corner experienced the greatest deflection, indicating the most extreme condition, with a load of 14 kN producing a deformation of 17,719 mm.
Inovasi Teknologi Perkerasan Jalan Beton Menggunakan Abu Vulkanik Dukono dan Kapur Sebagai Substitusi Semen Mulya, Elfira Resti; Goraahe, Siti Hadija; Darwis, Fitro
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Road construction in Indonesia is increasing every year, including in Morotai, North Maluku. Low traffic can use rigid pavement technology or cement concrete pavement. Regional roads to connect various areas in the region such as industrial and tourism areas, agricultural areas and regional productivity. The purpose of this study is to determine the strength of concrete using Dukono volcanic ash and lime as a cement substitute as a technological innovation in concrete road pavement. This research method is an experimental method, where experimental testing is carried out in the Laboratory to determine concrete with a substitution of Dukono volcanic ash and lime for cement. Concrete strength tests carried out include compressive strength tests and split tensile strength tests. The results of the study showed that the concrete compression test with a variation of 15% volcanic ash and 5% lime had a compressive strength value of 351.45 kg / cm2, an increase in the compressive strength value of 16.5% from the planned concrete compressive strength, and for 20% ash and 5% lime an increase of 4.36%. For concrete road pavement, the use of volcanic ash and lime can be a solution for regional road pavement. Because at a percentage of 15% volcanic ash with 5% lime as a cement substitute, it results in an increase in concrete compressive strength of 16.5% at K-300.
Inventory Management Optimization of Snack to Minimize Days Sales Inventory (DSI) and Total Cost Dewi, Yulida Intani; Elfantoro, Indra; Herdiana, Mochamad Rafi; Ikatrinasari, Zulfa Fitri
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

This study aims to optimize inventory control for snack products in the retail industry, characterized by highly fluctuating demand and elevated Days Sales Inventory (DSI) levels. Focusing on Class A products with high DSI offers the greatest potential impact on inventory management efficiency. The approach integrates Holt-Winters forecasting, ARIMA (1,1,1), and Random Forest Regression with quantitative models such as Economic Order Quantity (EOQ) and Periodic Order Quantity (POQ), as well as stock control techniques including Safety Stock and Reorder Point, to determine the optimal order quantity and ordering time. Sales data for 21 weeks were processed to generate sales forecasts for the subsequent 31 weeks, covering weeks 22 through 52, using all three forecasting methods. The evaluation metrics indicate that Random Forest Regression achieved the best performance, with a Mean Absolute Error (MAE) of 42.4, Mean Absolute Percentage Error (MAPE) of 13.9%, and a Root Mean Squared Error (RMSE) of 46.7, The results show a significant reduction in DSI and total costs, contributing positively to strengthening the company’s cash flow. Further analysis over the 31-week period using the POQ method resulted in a decrease in DSI from the actual level of 111 days to 71 days, and also reduction in total cost from IDR 14.933.114 to IDR 10.104.863, representing a difference of IDR 4.828.250. In addition to the integrated forecasting and EOQ–POQ methods, it is recommended to enhance the adaptation of dynamic forecasting models that are more responsive to changes in demand patterns and to develop real-time monitoring systems using ERP or IoT technology to minimize the risks of stockouts and product spoilage. This research provides both practical and academic contributions toward achieving more efficient and sustainable inventory management for snack products. 
Analisis Pengaruh Rasio Kotoran Kuda Dan Sampah Sayur Sebagai Biogas Nur Rochim, Muhammad Ryan; Aussie Amalia
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The increasing volume of organic waste, especially market vegetable waste and animal waste, poses a challenge in environmental management because it has not been optimally utilized as a renewable energy source. This study aims to analyze the effect of the mixture ratio of horse manure and organic waste on biogas production using the anaerobic co-digestion method. The main ingredients consist of horse manure and market vegetable waste with the addition of Effective Microorganism 4 (EM4) starter and biogas probiotics. Variations in the mixture ratio used include 20:80, 30:70, and 50:50 (horse manure: vegetable waste). The parameters observed include methane (CH₄), carbon dioxide (CO₂), and C/N ratio. The results showed that the 50:50 ratio with the addition of EM4 produced the best performance with a methane content of 58.35% and CO₂ of 41.65%. These findings indicate that a balanced mixture composition and the use of EM4 can increase microorganism activity and accelerate the fermentation process. Thus, selecting the right substrate ratio and appropriate inoculum can be a potential strategy in developing environmentally friendly biogas energy.
Evaluasi Respons Struktural Pondasi Mesin Kapal Polbeng 2 Menggunakan FEM: Pendekatan Multi-Material dan Analisis Dinamis Angrayni, Septi Ayu; Audina, Nur; Roher, Fahendi
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The engine foundation is a critical structural element in a ship’s propulsion system because it functions to withstand static loads, dynamic loads, and vibrations generated by the engine. The Polbeng 2 vessel experienced a significant change in the form of a main engine replacement, which affected the magnitude of the load, support points, and vibration characteristics. This study aims to evaluate the structural response of the engine foundation using the Finite Element Method (FEM) by involving three types of materials: fiberglass, hybrid composite (glass–carbon), and carbon fiber composite. The analyses conducted include static structural analysis, modal analysis, and harmonic response to detect potential resonance. The results show that the carbon fiber composite exhibits the lowest von Mises stress of 0.009 MPa and the minimum deformation of 0.24 mm. Modal analysis indicates that the natural frequencies of the structure fall within the range of 300–520 Hz, which is far from the engine excitation frequency (110–220 Hz), thus minimizing the risk of resonance. This study confirms that optimizing the material and foundation configuration provides significant improvements to the structural performance and service life of the ship’s propulsion system.

Page 91 of 97 | Total Record : 964

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