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Muhammad Nizar
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Journal Serambi Engineering (JSE)
Published by Universitas Serambi Mekkah Aceh
ISSN : 25283561     EISSN : 25411934     DOI : -
Core Subject : Science, Social, Engineering,
Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering
Jurnal ini bertujuan untuk merancang dan mengembangkan sistem turbin angin sebagai alat pengusir hama burung sekaligus sebagai pembangkit listrik alternatif di area persawahan. Penelitian difokuskan pada pemanfaatan energi angin untuk menggerakkan perangkat mekanik penghasil suara (sebagai pengusir burung pipit) serta menghasilkan energi listrik menggunakan generator Nema17 untuk pengisian baterai. Selain itu, penelitian ini bertujuan menganalisis hubungan antara kecepatan angin, desain blade (panjang dan karakteristiknya), putaran turbin, serta tegangan dan daya listrik yang dihasilkan, guna memperoleh performa optimal dalam kondisi lapangan
Arjuna Subject : -
Articles 972 Documents
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Analisis Kualitas dan Rasio Indikator Pencemaran Air Pada Kolam Bekas Penambangan Pasir  di Desa Tewang Rangkang Kalimantan Tengah Prayoga, Aditia
Jurnal Serambi Engineering Vol. 10 No. 4 (2025): Oktober 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Danau Biru” is a former sand mining pond located in Tewang Rangkang Village, Tewang Sangalang Garing Sub-district, Katingan Regency, Central Kalimantan Province. This study aims to analyze the water quality of the pond based on Government Regulation (PP) No. 22 of 2021 concerning Water Quality Standards for Lakes and to evaluate the pollution index. Water sampling was divided into primary and secondary data. Primary data included recording the coordinates of sampling points, collecting water from each predetermined site, documenting all sampling activities, and preparing accessibility, geological, and sampling point maps. Secondary data were obtained from relevant companies and institutions, including laboratory test results and supporting hydrological data. The results indicate that the pond water has been polluted, mainly due to the impact of past sand mining activities, the geological structure of the area, and local community activities. Several parameters exceeded the permissible thresholds set by PP No. 22/2021. Furthermore, the Pollution Index (PI) calculation for samples D1–D4 confirmed that the pond water is categorized as polluted across various classes of water utilization. These findings highlight the urgent need for monitoring and policy regulations regarding water management in the pond to prevent further environmental degradation.
Pengaruh Jenis Pelarut Dan Waktu Ekstraksi Terhadap Sitronelol Anti Nyamuk Dari Ekstrak Geranium Radula Cavan (Daun Ambre) Anissa, Syavrielya; Adira Nanthalia; Retno Dewati
Jurnal Serambi Engineering Vol. 10 No. 4 (2025): Oktober 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Geranium Radula Cavan, also known as Ambre leaf, is a mosquito-repellent plant that grows in the regions of Sumatra and Central Java. This plant can be used as a natural mosquito repellent to protect humans from mosquito disturbances or bites by applying or spraying it onto the body or clothing. The essential oil extracted from Ambre leaves contains major compounds such as citronellol (C₁₀H₂₀O) and geraniol (C₁₀H₁₈O). These compounds produce a distinctive aroma that mosquitoes find unpleasant. This study aims to determine the effect of solvent type (96% Ethanol; Ethyl Acetate; Chloroform; N-Hexane; and Benzene) and extraction duration (1 day; 2 days; 3 days; 4 days; and 5 days) on citronellol content and essential oil yield, in order to identify the most optimal process conditions. The highest citronellol content and essential oil yield were obtained at 28,22% and 19,63%, respectively, using 96% ethanol as the solvent with a 4-day soaking duration. GC-MS analysis was used to determine the citronellol content in the essential oil, which had been extracted and purified through distillation. The solvent-to-leaf ratio used in the extraction process was 10:1 mL/g.
Pengaruh Variasi Enzim Lipase Amobil Terhadap Rasio Mol CPO: Metanol Pada Transesterifikasi Putri Dania, Elisabeth; Aznury, Martha
Jurnal Serambi Engineering Vol. 10 No. 4 (2025): Oktober 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Biodiesel is a renewable and environmentally friendly alternative fuel that can be produced from vegetable oils such as Crude Palm Oil (CPO). This study aims to evaluate the effect of varying the mass of immobilized lipase enzyme (12–16 grams) and the molar ratio of CPO to methanol (1:4 and 1:6) on the quality of biodiesel produced through a transesterification process using a Packed Bed Reactor. The process stages include degumming, neutralization, and transesterification at a reaction temperature of 40°C for 6 hours. Immobilized lipase was chosen as the biocatalyst due to its ability to operate under mild conditions and produce high-quality biodiesel without generating harmful waste. The best result was achieved at a 1:4 molar ratio and 15 grams of enzyme, producing biodiesel with a density of 875.67 g/cm³, viscosity of 3.97 mm²/s, saponification value of 177.65 mg KOH/g, acid value of 0.32 mg KOH/g, iodine value of 48.05 g I₂/100 g, cetane number of 66.21, yield of 90.20%, and methyl ester content of 97.31%. All parameters met the Indonesian National Standard (SNI 7182:2015).
Pengaruh Variasi Elektrolit (NaCl dan N2SO4) Untuk Meningkatkan Kinerja Komposit 5%Cu-TiO2/BiVO4 Dalam Fotoelektrokimia Water Splitting Nurhayati, Siti; Vera Pangni Vahriani; Sarah Dampang; Muhammad Fahmi Hakim; Bunga Nurkhalifah
Jurnal Serambi Engineering Vol. 10 No. 4 (2025): Oktober 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The demand for environmentally friendly energy sources has encouraged the use of photoelectrochemical (PEC) technology to produce hydrogen from water. This study aims to evaluate the performance of a 5% Cu–TiO₂/BiVO₄ composite material. The main focus is to examine the effect of two types of neutral electrolytes, NaCl and Na₂SO₄, on the performance of a single-compartment PEC system. Based on characterization results using SEM-EDS and UV-Vis DRS, copper (Cu) doping successfully reduced the material's band gap to 2.02 eV and improved charge separation efficiency. System testing showed that the NaCl solution produced the highest initial voltage of 0.73 V and exhibited relatively stable performance, although it posed a potential risk of electrode corrosion. In contrast, Na₂SO₄ produced a lower voltage (0.66 V) but was more chemically stable and safer for long-term use. The results indicate that combining Cu–TiO₂/BiVO₄ material with appropriate electrolyte selection can be an effective strategy to improve the efficiency of PEC systems for hydrogen generation from light.
Perencanaan Pit Limit Penambangan Blok D dengan Optimasi Nilai Net Present Value Pada PT Bumi Indo Power Kabupaten Tanjung Jabung Barat Provinsi Jambi Yulanda, Yudi Arista
Jurnal Serambi Engineering Vol. 10 No. 4 (2025): Oktober 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

PT. Bumi Indo Power (BIP) will open a new pit in an area where there is still coal distribution in the mining business permit area, namely in block D of PT Bumi Indo Power, for this reason, planning for determining mining boundaries (pit limits) is needed based on the optimal Stripping Ratio value. The purpose of this study is to determine the most optimal Stripping Ratio value to obtain maximum profits using the discounted cash flow method, so that the optimum mining limit (Ultimate Pit Limit) can be determined. then make a pit plan and mining limits in accordance with the geometry recommendations, namely a tier height of 10 m, a tier width of 5 m, and a single slope of 45°. The optimization process is carried out by compiling data on stripping ratio variations that represent pit boundaries and reserves at each stripping ratio, then combined with economic considerations using a discount rate of 11.76% to obtain the Net Present Value (NPV) value, so that it can be analyzed through an optimization curve. The results of the study show that the optimum stripping ratio value obtained through the optimization curve with the Conventional NPV method in the Spot Price scenario is 8.8 with total reserves reaching 907,717 tons, a mine life of 4 years, and an NPV of IDR 285,254,334,789.00.
Pengaruh Variasi Komposisi dan Tekanan Alat Press Mini Produk Terhadap Mechanical Properties Produk Papan Silikat Skala Mini (Studi Kasus di PT XYZ) Bayhaqi Ilham, Aldiana; Dampang, Sarah
Jurnal Serambi Engineering Vol. 10 No. 4 (2025): Oktober 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Silicate board is one of the products produced at PT XYZ. This material is resistant to water and fire, making it very useful in building construction. In addition, silicate board can be used as an alternative to bricks or gypsum because it is easier to apply. The manufacture of silicate board requires the right combination of compositions to suit industrial needs. This study aims to analyze the effect of variations in composition and pressure in the process of making small-scale silicate boards (mini products). Mini products are made in several samples with different combinations of composition and pressure. In the study, cement compositions were used with percentages of 30%, 32%, and 34% at each pressure. Meanwhile, the pressure applied was 60 bar and 70 bar for each composition. The analysis parameters include the Modulus of Rupture (MOR), Moisture content, Water absorption, and density values ​​in each sample. The results of the study showed fluctuations in these values ​​based on variations in composition and pressure. However, there was one sample that consistently had the highest value in various aspects. This finding indicates that the combination of composition and pressure must be adjusted properly to produce silicate boards with optimal quality.
Pengaruh Kuat Tekan Beton Dengan Menggunakan Kapur Dan Silica Fume Sebagai Bahan Tambah Semen M. Aldi Hadrian
Jurnal Serambi Engineering Vol. 10 No. 4 (2025): Oktober 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Cement is the main material in concrete production; however, its manufacturing process generates significant CO₂ emissions that negatively affect the environment. Therefore, alternative materials are needed to partially replace cement with more environmentally friendly options. This study aims to analyze the effect of lime and silica fume on the compressive strength of concrete and compare the results with normal concrete. The research was conducted using an experimental method with three variations of concrete mixtures: normal concrete, concrete with 5% substitution of lime and silica fume, and concrete with 10% substitution based on cement weight. The results showed that normal concrete achieved an average compressive strength of approximately 20.6 MPa. At 5% substitution, the compressive strength increased to 21.258 MPa (an improvement of about 3.17%), while at 10% substitution it reached 21.898 MPa (an improvement of about 6.29%). These findings indicate that the addition of lime and silica fume can enhance the compressive strength of concrete, although the improvement is relatively minor. Further analysis is required to determine whether this difference is technically significant or merely a result of experimental variation. Overall, lime and silica fume have the potential to serve as partial cement substitutes that support the development of environmentally friendly concrete while maintaining its technical performance.
Penentuan Rute dan Pengelolaan Persediaan dengan Mempertimbangkan Jumlah Permintaan Stokastik dan Jendela Waktu Achmad, Andi Muhammad Fiqri; Irfan Rusydi Triyanto
Jurnal Serambi Engineering Vol. 10 No. 4 (2025): Oktober 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

One problem with stochastic characteristics is the drug distribution process. Drug demand originates from pharmacies, with the quantity requested varying each time a request is sent. This can be caused by several factors, one of which is that people's illnesses also vary and are not always the same. Due to this fluctuating demand from pharmacies, drug distributors must also provide larger quantities of drugs in their warehouses as safety stock. This study aims to develop a mathematical model for determining distribution vehicle routes and inventory management by considering uncertain demand and the presence of time windows. The developed mathematical model is in the form of a MILP. The data used is entirely synthetic and randomly generated. Data processing is carried out with several scenarios, by measuring the objective function value and computation time. The data processing results have produced a global optimal solution for 15 retailers and 5 different Beta value scenarios. The objective function value and computation time will increase with the increase in the number of retailers/pharmacies.
Kajian Potensi Turbin Angin Sumbu Horizontal Menggunakan Metode Simpangan Baku Distribusi Weibull Fauzan, Dimas Muhammad
Jurnal Serambi Engineering Vol. 10 No. 4 (2025): Oktober 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

This study evaluates the wind energy potential in West Kalimantan by utilizing annual wind speed data from the Meteorology, Climatology, and Geophysics Agency (BMKG) Supadio Pontianak, recorded from January 1 to December 31, 2024. The analysis applies the standard deviation method within the Weibull distribution to determine the shape k and scale c parameters, which are subsequently used for estimating the annual energy output of a wind turbine. Research procedures include secondary data collection, wind speed data processing, statistical analysis, Weibull parameter estimation, model validation using Mean Absolute Error (MAE), and energy potential calculation based on the turbine power curve. Results show that the average wind speed is 5.11 knots (2.63 m/s) with a standard deviation of 2.96 knots, resulting in k=1.8182 and c=5.7726 knots. The Weibull model fits the observed data well, with an MAE of 0.06666. The Aeolos-H 3 kW turbine was chosen as a case study, showing an estimated annual energy production of 261.890 kWh. These findings demonstrate that even under low to moderate wind conditions, properly selected turbines can generate meaningful electricity output. This study provides insights for small-scale renewable energy development and supports technology selection for wind power generation in low-wind-speed regions of Indonesia.
Studi Pemanfaatan Abu Ampas Tebu Sebagai Substitusi Parsial Semen Pada Campuran Bahan Pembentuk Mortar Untuk Pekerjaan Sipil Hakim, Abdul
Jurnal Serambi Engineering Vol. 10 No. 4 (2025): Oktober 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Some waste has the potential to cause pollution, but there is waste that is useful as a mortar mixture, namely sugar cane bagasse ash (AAT). This study aims to determine the chemical composition of SBA and its suitability as a material for reducing cement content in the mortar formation process. Laboratory tests, including chemical composition tests, XRD, and SEM, were conducted to determine the morphological structure of SBA and mortar. Additionally, physical tests were conducted on the mortar-forming materials to verify whether they met the standards. Furthermore, mortar samples with SBA content of 0%, 5%, 10%, 15%, 20%, and 25% SBA content, with dimensions of 5x5x5 cm³, were prepared for compressive strength testing at 7, 14, and 28 days, and with a diameter of 7.5 cm and length of 15 cm for splitting tensile strength and water absorption testing at 28 days. Tensile strength and water absorption tests were conducted at 28 days. The compressive strength test results showed that mortar with 5% SBA content had the highest compressive strength and split tensile strength at 28 days, specifically 22.26 MPa and 4.48 MPa, representing increases of 29.02% and 13.71% from mortar with 0% SBA. Meanwhile, the results of the water absorption test showed that the 5% SBA mortar had the lowest water absorption rate, which was 8.59%.

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