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Dr. Ratih Kumalasari, S.Pd., M.Si.
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INDONESIA
Jurnal Jaring SainTek
Published by Universitas Bhayangkara Jakarta Raya
ISSN : -     EISSN : 26569485     DOI : https://doi.org/10.31599/jaring-saintek.v2i2.323
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Energy Engineering Industrial & Manufacturing Engineering
Jurnal Jaring SainTek (JJST) merupakan merupakan jurnal ilmiah yang diterbitkan oleh Lembaga Penelitian, Pengabdian Masyarakat, dan Publikasi (LPPMP) Universitas Bhayangkara Jakarta Raya dan dikelola oleh Fakultas Teknik Universitas Bhayangkara Jakarta Raya. Jurnal Jaring SainTek (JJST) ini merupakan kumpulan artikel – artikel ilmiah dari hasil penelitian, ulasan ilmiah, serta kajian berkaitan dengan disiplin ilmu teknologi industri, kimia, perminyakan, lingkungan, dan informatika yang menjadi obyek kajian pada umumnya. Jurnal ini diterbitkan dua kali setahun (semester genap terbit April dan semester ganjil terbit Oktober). Pertama kali terbit bulan April 2019 dengan E-ISSN: 2656-9485.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 142 Documents
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Pengembangan Konsep Teknologi Hijau Dalam Agroindustri Minyak Goreng Siswahyu, Agung; Widyantoro, Murwan
Jurnal Jaring SainTek Vol. 7 No. 2 (2025): Oktober 2025
Publisher : Fakultas Teknik, Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/ftcxpb24

Abstract

This study evaluates the utility and emission reductions of a 1,500 ton/day palm cooking oil production plant through Aspen Hysys simulations (gate-to-gate) and process scenarios. The model includes degumming, bleaching, deodorization, fractionation, hot oil heating utilities, water cooling, and electricity. Three scenarios were tested: (1) Heat Exchanger Networking (HEN) for inter-stream heat exchange; (2) oil recovery in spent bleaching earth (SBE) as fuel; and (3) integration of HEN + SBE recovery. Results show reductions in heat, water, electricity, fuel, and emission requirements compared to the baseline, with the best performance differing per metric: scenario 3 effectively reduces heat, fuel, and emission requirements, while scenario 2 is efficient for water and electricity consumption. The study confirms that the application of green technology improves both the efficiency and sustainability of the Indonesian cooking oil industry.
Complex Prostate MRI Image Analysis Using Phase Unwrapping and Water-Fat Separation Under Noise Influence Basuki Rahmat, Basuki
Jurnal Jaring SainTek Vol. 7 No. 2 (2025): Oktober 2025
Publisher : Fakultas Teknik, Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/49g5ey35

Abstract

This study aims to analyze complex prostate MRI images using phase unwrapping and Water-Fat Separation (WFS) methods while considering the effect of noise. The steps include complex image formation, phase unwrapping, testing sensitivity to noise, and separating water and fat components using a dual echo time approach (Dixon method). The unwrapping results show that noise significantly affects the accuracy of phase estimation. At a Noise Parameter of 0.3, the Mean Squared Error (MSE) was 39.62, while increasing the Noise Parameter to 0.7 raised the MSE to 168.89. The separation of water and fat signals was successfully achieved, where the water signal followed the original prostate structure, and the fat signal appeared as a distinct spatial gradient. This study demonstrates that complex MRI image processing of the prostate has strong potential to improve diagnostic accuracy through phase analysis and tissue distribution mapping.
Efektivitas Membran Reverse Osmosis pada Pengolahan Limbah Cair di Industri Migas Anggraini, Adinda Dhayu; Mulyanti, Heri
Jurnal Jaring SainTek Vol. 7 No. 2 (2025): Oktober 2025
Publisher : Fakultas Teknik, Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/a68c4y04

Abstract

This study aims to evaluate the effectiveness of Reverse Osmosis (RO) membranes in reducing Total Dissolved Solids (TDS) in wastewater treatment in the oil and gas industry. High levels of TDS in industrial wastewater can affect equipment performance and does not meet water quality standards. The study used a descriptive quantitative approach with observation, interviews, literature studies, and company data analysis methods. The RO system implemented included pretreatment, chemical injection, high-pressure filtration, and storage of treated water. The results showed a significant decrease in TDS from 1,200 mg/L to 150 mg/L (efficiency 87.5%), turbidity from 3.2 NTU to 0.8 NTU (75%), and total hardness from 450 mg/L to 80 mg/L (82.2%), while pH was stable in the range of 6.8–7.1. These results prove that RO technology is capable of producing water with quality that meets the quality standards of the Minister of Health Regulation No. 492 of 2010. This study confirms the superiority of RO as an effective industrial water treatment method and recommends further research on operational costs, energy efficiency, and fouling control for long-term optimization.
Evaluasi Numerik Kekuatan Struktur Baja Gable Frame Dengan Rafter WF Lurus Terhadap Beban Seismik Ramlan Wijaya, Taufik; Chandara, Kumala
Jurnal Jaring SainTek Vol. 7 No. 2 (2025): Oktober 2025
Publisher : Fakultas Teknik, Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/j3kqpg45

Abstract

The structural performance of straight WF rafter gable frames with spans of 16 m and 24 m under static and seismic loadings according to SNI 1726:2019 was conducted in this study. The numerical analysis used solid finite elements provided in ANSYS by focusing on deformation, drift ratio, maximum stress, and stress ratio (SR). The results indicate that for the 16 m span, the straight WF rafters remain within strength and serviceability limits with drift ratios of 0.237–0.285% and maximum stresses of 244.64–279.77 MPa. However, for the 24 m span, deformation increases to drift ratios of 0.421–0.442% and stresses of 232.95–259.95 MPa, causing some models to exceed the SNI limit and the yield strength limitation (SR > 1). Therefore, in earthquake-sensitive areas, straight WF rafters are recommended only for gable frames with short to medium spans. Meanwhile longer spans require modified profiles or alternative structural systems to satisfy strength and serviceability criteria.
Analisis Risiko Kesehatan Lingkungan Fasilitas Jamban di Desa Jetis, Kecamatan Nusawungu, Kabupaten Cilacap Triyono; Warniningsih; Amyati, Amyati
Jurnal Jaring SainTek Vol. 7 No. 2 (2025): Oktober 2025
Publisher : Fakultas Teknik, Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/mk3bpj67

Abstract

This research aims to analyze the condition of latrine facilities and assess environmental health risks in Jetis Village, Nusawungu District, Cilacap Regency. The study is part of the Environmental Health Risk Assessment (EHRA) conducted for the development of the District Sanitation Strategy (SSK). The method employed was a participatory household survey in the selected village, focusing on latrine facility indicators and sanitation behavior based on STBM pillars. The study results indicate that although private latrine access reached 93%, the greatest risk stems from fecal sludge management. A total of 95% of septic tanks were suspected to be unsafe and 67.8% were never emptied, indicating a high potential for contamination. Furthermore, Open Defecation (OD) behavior was still detected in 22.7% of households. These findings highlight the urgency of sanitation interventions focused on improving septic tank safety at the study location.
Analisis Nilai SO2 dan NO2 Cerobong Emisi pada Industri Peleburan Baja Kabupaten Bekasi Daningsih, Woro Wur; Wangitan, Roy; Febrina, Laila; khasanah, fata nidaul
Jurnal Jaring SainTek Vol. 7 No. 2 (2025): Oktober 2025
Publisher : Fakultas Teknik, Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/5my8c492

Abstract

PT X operates in the steel smelting and rolling industry (Furnace & Steel Rolling). The purpose of this study is to examine the steel smelting production process at PT X that has the potential to generate emissions, to identify PT X’s emission control processes, to assess the measurement results of particulate, opacity, SO₂, and NO₂ parameters from steel smelting, and to analyze whether PT X’s emissions comply with the emission quality standards. Steel smelting activities are a major source of NOx, SOx, and particulate formation. The use of raw materials such as pig iron, cast iron, and hot briquetted iron, which contain sulfur levels ranging from 0.05–0.15%, serves as the main source of SOx emissions. The injection of pure nitrogen and pure oxygen into the electric arc furnace contributes to NOx emissions. The results of stack gas emission testing at PT X showed maximum levels of 47 mg/m³ for particulates, <20% for opacity, 76 mg/m³ for SO₂, and 11.49 mg/m³ for NO₂ during the period from the second quarter of 2024 to the first quarter of 2025.
Evaluasi Kekuatan dan Daktilitas Sambungan BEEP pada Struktur Baja SRPMK dengan Variasi Sudut Pengaku (RETRACTED) Taufik Ramlan Wijaya
Jurnal Jaring SainTek Vol. 8 No. 1 (2026): April
Publisher : Fakultas Teknik, Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/5xrxnn42

Abstract

This Article has been RETRACTED from Jurnal Jaring SainTek Vol 8 No 1, April 2026
Pengaruh Bentuk dan Jarak Purlin terhadap Stabilitas Lateral Rafter pada Struktur Portal Baja Taufik Ramlan Wijaya
Jurnal Jaring SainTek Vol. 8 No. 1 (2026): April
Publisher : Fakultas Teknik, Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/kra0n438

Abstract

This paper presents the results of research on the lateral stability of rafter beams in steel frame structures with and without considering the contribution of purlins. Numerical simulations of six three-dimensional finite element models have been carried out by varying the profile and spacing of purlin. The purlin shapes used are C and Z profiles. The purlin spacing used is 1 m, 1.42 m, and 2 m. It was revealed that rafters that include purlin contributions (braced) have a greater elastic critical moment  (Mcr-elastic) capacity, between 321.37% - 444.68%, compared to those that do not include purlins (unbraced). It was also found that due to its greater weak axis inertia, the Z profile has superior performance (by 1.776% – 2.846%) compared to the C profile. It was revealed that increasing the number of purlins (bracing) resulted in Mcr-elastic  ​​values exceeding the plastic moment (Mp) by 18.082% – 52.638%. Meanwhile, if the purlin is not considered (unbraced) the Mcr-elastic  values are below the plastic moment (Mp). It was also found that purlins could effectively shifts the rafter failure mode from elastic lateral torsional buckling to yield condition.
Analisis Clustering Pelaku Usaha UMKM Kota Bekasi Menggunakan Algoritma K-Means Michelle Ledisty Aisha; Rafika Sari; Ratna Salkiawati
Jurnal Jaring SainTek Vol. 8 No. 1 (2026): April
Publisher : Fakultas Teknik, Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/d472ha48

Abstract

Micro, Small, and Medium Enterprises (MSMEs) are the backbone of Indonesia's economy, employing over 97% of the workforce. However, the absence of data-driven classification hampers the formulation of effective support policies. This study aims to cluster MSMEs in Bekasi City based on business capital, revenue, and subdistrict location using the K-Means Clustering algorithm. A total of 7,923 entries were analyzed after cleaning the initial 7,964 dataset. The optimal number of clusters was determined using the Davies-Bouldin Index (DBI), with the best score of 0.5940 achieved at K=3. The clustering was conducted in two stages: manual calculation on a sample of 138 data points and automated processing via Python for the full dataset. The manual process converged at the 3rd iteration, where each step involved calculating Euclidean distances to cluster centroids, followed by centroid updates based on the mean of cluster members. The results classified MSMEs into three categories: small-scale, medium-scale, and large-scale enterprises. Small-scale MSMEs, typically with capital and revenue below IDR 5 million, are concentrated in Mustika Jaya, Pondok Gede, and Bantar Gebang. In contrast, large-scale MSMEs with higher financial figures are mostly found in Bekasi Selatan, Medan Satria, and Rawalumbu. This clustering model offers a practical foundation for designing more targeted, spatially informed, and adaptive MSME development policies.
Perancangan Mesin Produksi Pelet ApungMenggunakan Metode Quality Function Deployment (QFD) Adi Muhammad Ma’sum; Rian Prasetyo
Jurnal Jaring SainTek Vol. 8 No. 1 (2026): April
Publisher : Fakultas Teknik, Universitas Bhayangkara Jakarta Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31599/tmqchf37

Abstract

Karangasem Village has a reservoir located in the Gunung Pegat tourist area. To reduce dependence on commercial fish feed. The group took the initiative to produce feed independently, but the group did not know how to make fish pellets independently. This study aims to design a small-scale floating pellet production machine using the Quality Function Deployment (QFD) method. Needs analysis using QFD, preparation of the House of Quality (HoQ), and benchmarking against two products available in the market. The final machine design uses a 2 HP electric dynamo, a galvanized UNP channel frame, an electric heating element with a temperature of 100–200°C, a stand-alone machine operating design, and is flexible to move. This machine is also equipped with a pellet screen that can be replaced as needed (2–5 mm). The benchmarking results show that the designed machine obtained the highest product position value compared to the two products available in the market. Thus, the application of the QFD method has proven effective in designing a floating pellet production machine according to user preferences and local conditions.

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