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JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI
Published by Universitas Al Azhar Indonesia
ISSN : 20879725     EISSN : 23558059     DOI : -
Core Subject : Health, Science, Engineering,
Biochemistry, Genetics & Molecular Biology Computer Science & IT Electrical & Electronics Engineering Industrial & Manufacturing Engineering Public Health
Jurnal AL-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI terbit 2 kali dalam setahun yaitu pada bulan Maret dan September adalah jurna; ilmiah yang mempublikasikan artikel hasil penelitan ilmiah dan ide-ide di bidang sains dan teknologi. Jurnal ini berfokus pada bidang teknik industri, teknik elektro, teknik infromatika, biologi, gizi dan teknologi pangan.
Arjuna Subject : Umum - Umum
Articles 306 Documents
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Analisis Potensi Energi Listrik dari Biogas Campuran Sampah Daun Ketapang dan Tinja Kerbau Falmansyah, Muhammad Ridho; Jelita, Marhama
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 9, No 2 (2024): May 2024
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v9i2.2821

Abstract

Leaf and twig waste accounts for 12.99% of Indonesia’s waste problems. One of the fertile plants that can produce 10 kg of leaf waste per day for an area of 1200 m3 is the ketapang tree. The ketapang tree has leaf waste that has the potential to become biogas through the fermentation process but produces a small amount of biogas, so the increase is done by mixing buffalo feces. Fermentation of a mixture of ketapang leaf waste and buffalo feces using a Batch-type digester by comparing using starter and non-starter to produce potential biogas and electrical energy. In the fermentation process of the mixture of ketapang leaf waste and buffalo feces, the temperature of the non-starter digester ranges from 26.3-32.6 °C and the starter 26.3-33 °C, the pH of the non-starter digester is in the range of 6.4-6.9 while the starter is 5.8-6.6. Biogas production generated from a mixture of ketapang leaf waste and buffalo work feces for non-starter is 0.00465 m3 and starter 0.0028 m3 with potential electrical energy generated non-starter 0.022 kWh and starter 0.013 kWh. Biogas and electrical energy production from a mixture of ketapang leaf waste and buffalo feces with non-starter is higher than using a starter.Keywords - Biogas, Ketapang Leaf Waste, Buffalo Feces, Starter, Electrical Energy.
Analisis Pemanfaatan Jerami Padi Sebagai Bahan Bakar Pembangkit Listrik Tenaga Biogas Ananda, Risky; Miefthawati, Nanda Putri
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 9, No 2 (2024): May 2024
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v9i2.2749

Abstract

This research was conducted in Limbukan Village, with a rice field area of 1,171 ha producing 5,855 tons of straw. The straw is currently not utilized, so it can potentially cause environmental pollution. The Limbukan area depends on electricity from PLN. In the face of the challenges of increasing energy demand, fluctuating energy prices and the negative environmental impact of unused straw waste, renewable energy assessment has become crucial for identifying sustainable alternatives. To overcome this problem, this research focuses on the potential of rice straw waste as a renewable energy source, with an emphasis on biogas fuel production. This research method involves the use of anaerobic fermentation to calculate biogas potential using Superpro Designer simulation. The research results show that rice straw waste has the potential to produce 208,393 m³ of biogas per day. Apart from that, by utilizing biogas fuel, this study also calculated the potential for electrical energy of 1,271,197.3 kWh. By using a 400 KW generator set, 1,200 Watts of electrical energy can be distributed to 333 residents' homes for approximately 24 hours. This research provides an overview of the potential for utilizing rice straw waste as a renewable energy source, especially in the context of biogas and electrical energy production. It is hoped that these findings can become a basis for developing sustainable solutions for managing agricultural waste and providing energy for local communities.Keywords - Anaerobic Digestion, Biogas, Rice Straw.
Optimasi Ukuran Lot Persediaan dalam Model Integrasi Single Vendor dan Single Buyer dengan Mempertimbangkan Kekurangan Buyer Rahma, Alifia Shafira; Dahda, Said Salim
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 9, No 3 (2024): September 2024
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v9i3.2715

Abstract

The supply chain is the main factor influencing the production process in achieving goals. This research develops a model to determine the optimal production lot size in the supply chain system between vendors and buyers by considering the inventory shortage at the buyer. Minimizing the combined inventory cost is the goal of optimizing the production lot size by developing an integration model to determine the optimal lot size. The proposed model uses a periodic delivery method from the vendor to the buyer and allows for inventory shortages at the buyer. An iterative algorithm is applied to find the optimal lot size and minimum integrated inventory cost. The results showed that the initial model with n=1 resulted in a total cost of 2252 and an optimal production size (Q*) of 457. The proposed model reduces the total cost to 1605 with an optimal production size (Q*) of 737. Sensitivity analysis showed that an increase in the frequency of deliveries to vendors and vendor set-up costs contributed to a rise in total cost, while an increase in vendor storage costs led to a decrease in production lot size. This research can improve the efficiency of production planning and inventory management in the supply chain.Keywords - Inventory, Shortages, Single Buyer, Single Vendor.
Analisis dan Perbaikan Sistem Pencahayaan Buatan pada Rumah Sakit Tipe C di Kota Semarang dengan Menggunakan Simulasi Software Dialux Evo 11.1 Rachmawan, Rizky Firdaus; Kanata, Sabhan; Sumarno, Radiktyo Nindyo
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 9, No 3 (2024): September 2024
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v9i3.3069

Abstract

The need for electrical energy is increasing due to population growth and the use of electrical equipment, including lighting systems or lamps. Lighting systems or lamps are important factors in creating a comfortable, safe and efficient atmosphere in the work environment, especially hospitals. Various methods have been used so that the lighting system or lamps can be optimized, for example by analyzing through Dialux Evo simulation. This study analyzes and improves the lighting system in a Type C hospital in Semarang using the Dialux Evo 11.1 simulation. The focus is on the nutrition or surgical polyclinic room and the operating room. The research method involves a comparison between the results of lighting strength measurements and simulations with the SNI 6197: 2011 standard. The measurement results show that the polyclinic room has an average lighting of 91.61 lux, while the simulation reaches 127 lux. For the operating room, the measurement produces 81.52 lux and the simulation 274 lux. Both of these rooms do not meet the minimum standards: 250 lux for the polyclinic room and 300 lux for the operating room. For the recommended improvements in the polyclinic room is the addition of 4 Philips LED-Tube 765 T8 AP C G light points or 5 Philips Downlight DN020B G3 D150 light points. While for the operating room, it is recommended to replace 14 points with Philips LED-Tube UO 16W865 T8 lights.Keywords - Lighting System, Strong Lighting, Dialux Evo 11.1, SNI 6197:2011
Desain Penggunaan Variable Frequency Drive (VFD) Pada Starting-Up Motor Induksi 3 Fasa Menggunakan Metode Sinusoidal Pulse-Width Modulation (SPWM) Sumarta, Prima; Aini, Zulfatri
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 9, No 3 (2024): September 2024
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v9i3.2910

Abstract

During the start up process, the induction motor has a fairly high starting current. It can even reach four to eight times the motor's nominal current. An initial current that is large enough and repeated over a short period of time can cause quite high heat in the motor wire coils and trigger a current break. This occurs due to heat accumulating in the motor system. So repeated incidents within a short period of time can result in damage to the coils and other motor components. To overcome this, a Variable Frequency Drive (VFD) is used which works by periodically increasing the voltage frequency so that it is able to turn off the current at start-up time intervals or is called the Soft Starting method on motors. The VFD modeling design is carried out based on the SPWM topology with the output parameters of current rotation, THD and reactive power. Test results show that motor performance using a VFD is able to reduce current to 110% from previously 620%, reduce Total Harmonic Distortion (THD) from 5.01% to 3.54%, and reduce motor reactive load from 14.31 kVar to 8 kVar with capacitance value 121.78πF.Keywords – VFD, SPWM, Motor Starting, THD.
Variasi Waktu Lama Fermentasi dan Konsentrasi Gula Terhadap Karakteristik Hand sanitizer Kombucha Bunga Telang Puspitasari, Budiarti; Marlina, Lusi
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 9, No 3 (2024): September 2024
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v9i3.3128

Abstract

 This study aims to determine the effect of fermentation time and sugar concentration on antibacterial activity in butterfly pea flower Kombucha hand Sanitizer. The experimental design in this study was a Completely Randomized Design (CRD) with variations in fermentation duration of 7 days, 10 days and 14 days and variations in sugar concentration of 20%, 30% and 40%. The testing parameters were the organoleptic test, pH and antibacterial activity. Data analysis used in this research was SPSS (Statistical Package for the Social Sciences) and EXCEL. The procedure of this research is to make kombucha of butterfly pea flower which will then be added during the process of making hand sanitizer. The results of the organoleptic analysis with Kruskal Wallis showed that each treatment did not have a significant difference (Asymp. Sig>0.05). The average value of hand sanitizer pH measurement is 4.47 which indicates that it is by SNI 06-2588: 2017. This antibacterial activity test uses E. coli bacteria with the best results, namely the diameter of the clear zone of 11.4 mm in the A3B3 treatment with a fermentation time of 14 days and a sugar concentration of 40%. This study concludes that the length of fermentation time and sugar concentration affect the antibacterial activity of hand sanitizer.Keywords – Antibacterial, Butterfly Pea, Fermentation, Hand sanitizer, Kombucha
Front Cover Jurnal Al Azhar Indonesia SERI SAINSTEKS, Front Cover Jurnal SERI SAINSTEK Azhar
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 9, No 3 (2024): September 2024
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v9i3.3394

Abstract

Quality Control of Furniture Products With SQC and FMEA Methods at UD. XYZ Erwansyah, Mohammad Septian; Aryanny, Enny
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 10, No 1 (2025): January 2025
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v10i1.2915

Abstract

In the era of globalization, increasingly fierce industrial competition forces companies to improve product quality and production efficiency. This study is focused on UD. XYZ iron fabrication company, which experienced a bench product defect rate of 13.68%, exceeding the intended tolerance standard of 9%. The purpose of this study is to analyze the quality control processes of bench furniture products at UD. XYZ to reduce the defect rate. For this purpose the writer used the Statistical Quality Control (SQC) and Failure Mode and Effect Analysis (FMEA) methods. Based on the data obtained, there are six types of defects that occur during the production process of furniture bench products with the largest percentage of defects being missing color (19.9%), followed by broken bench pads (19.1%), and broken rubber feet (17.7%). Based on the RPN calculation, the first highest RPN is obtained for the type of missing color defect of 210, which is caused by the lack of worker accuracy. Second, the bench pad broke at 210, which is caused by the worker being too hard when hitting the bench pad. Third, the rubber foot broke by 180 which is caused by the worker hitting the rubber foot too hard. To reduce the defect rate it is recommended for the company management to provide more supervision and training to the workers.Keywords – Failure Mode and Effect Analysis, Furniture, Statistic Quality Control, Quality Control.
Evaluation of Critical Success Factors in The Indonesian Automotive Industry using DEMATEL-Based ANP to Implement Green Supply Chain Management Rivero, Max Dewar; Ardi, Romadhani
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 10, No 1 (2025): January 2025
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v10i1.2957

Abstract

 Analysis of Indonesian car production data in 2022 shows significant trend for increase in production and sales from year to year. The automotive industry in Indonesia is currently an important non-oil and gas sector which has a major contribution to the national economy. Currently, Indonesia has 22 four-wheeled motor vehicle industry companies. The higher the level of car production, the higher the CO2 emissions produced, and the higher the worldwide pressure to the countries to reduce the CO2 emission damage. Therefore car companies must implement Green Supply Chain Management (GSCM). However, the many criteria in GSGM implementation make it difficult for industry players to decide on the appropriate strategic decisions. The aim of this study is to find out the critical success factors in implementing GSCM in the Indonesian automotive industry and their interrelationship. The method used in this study is the Decision Making Trial and Evaluation Laboratory (DEMATEL) based on the Analytic Network Process (ANP). The results of this study show that the top five of 25 critical success factor in global weight are: top management perspective 4.86%, company competitiveness 4.57%, economic interest 4.55%, Using energy-efficient machinery and equipment 4.49% and Carbon footprint identification 4.48%.Keywords - Automotive Industry, Critical Success Factors, DEMATEL Based ANP, Green Supply Chain Management.
Design of Lean Manufacturing to Improve Efficiency of The Coffee Agro-Industry Supply Chain Sriwana, Iphov Kumala; Santosa, Budi; Pambudi, Hardian Kokoh; Maulanisa, Nida Fariza
JURNAL Al-AZHAR INDONESIA SERI SAINS DAN TEKNOLOGI Vol 10, No 1 (2025): January 2025
Publisher : Universitas Al Azhar Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36722/sst.v10i1.3330

Abstract

nappropriate material processing and supplying activities in a coffee agro-industry supply chain potentially lead to excessive waste, resulting in very low efficiency. Efficiency in the coffee agro-industry supply chain has to be considered, since the coffee agro-industry provides relatively high contribution to GDP, approximately 13.7%. Wasteful activities may significantly affect the GDP earned if not being eliminated. This study was aimed to identify waste produced along the coffee agro-industry supply chain and provide recommendations for improving supply chain efficiency, from the harvesting to the ground coffee processing. Actors of the coffee agro-industry supply chain consist of various parties, i.e. farmers, collectors, processors, and consumers. The supply chain is comprised of internal, external, and overall activities in which material and information flows are integrated within business units that traverse simultaneously between direct suppliers and consumers. In order to achieve optimum results, efficiency improvement by eliminating all sources of waste must be carried out at each stage. The method used to obtain this efficiency was Lean manufacturing, initiated with identifying waste using Process Activity Mapping (PAM), followed by identification with Current Value Stream Mapping (VSM). The efficiency value of the current condition was 93,9%. This shows the condition is good and there is no waste in time. There are other waste that needs to be analyzed, namely motion analysis and process. Keywords - Coffee, Efficiency, Supply Chain, Process Activity Mapping, Value Stream Mapping.

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