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INDONESIA
Jurnal IPTEK
Published by Institut Teknologi Adhi Tama Surabaya
ISSN : 14117010     EISSN : 2477507X     DOI : -
Core Subject : Science, Engineering,
Civil Engineering, Building, Construction & Architecture Computer Science & IT Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal IPTEK - Media Komunikasi Teknologi Diterbitkan secara berkala setahun 2 (dua) kali pada bulan Mei dan Desember oleh Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM), Institut Teknologi Adhi Tama Surabaya (ITATS). Jurnal ini memuat hal-hal yang berkaitan dengan bidang Teknik Sipil, Teknik Mesin, Teknik Elektro, Teknik Arsitektur, Teknik Perkapalan, Teknik Informatika, Teknik Industri, Teknik Kimia, Teknik Lingkungan, Teknik Pertambangan, Teknik Geologi, Desain Produk, Sistem Informasi, dan Sistem Komputer baik yang ditulis dalam bahasa Indonesia maupun bahasa Inggris (diutamakan).
Arjuna Subject : -
Articles 378 Documents
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Diagenetic Controls on Porosity in Sandstones of the Talang Akar Formation: A Case Study from the Rambangnia River Track, South OKU, South Sumatra Rochmana, Yogie Zulkurnia; Jati, Stevanus Nalendra; Puspita, Mega; Idarwati, Idarwati; Pranata, Ridho
Jurnal IPTEK Vol 29, No 1 (2025)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2025.v29i1.6746

Abstract

Porosity contributes to fluid storage and determines reservoir quality. The higher the porosity, the more free space is available to store fluid. However, the porosity of reservoirs, particularly the sandstones of the Talang Akar Formation of the Rambangnia River track, is not always good. The diagenetic process in the formation of sandstones is thought to contribute to variations in porosity quality. This study aims to determine the control of diagenesis on the porosity of sandstones of the Talang Akar Formation of the Rambangnia River, South Sumatra. The research methods used were field observation, petrographic, diagenesis, and porosity analysis. Based on petrographic analysis, the study area has three types of sandstone: lithic wacke, sublitharenite, and litharenite. The study of diagenesis shows that the sandstones in the Rambangnia River’s Talang Akar Formation have gone through an intense compaction phase, dissolution, cementation by silica and calcite minerals, and an authigenic phase in clay minerals.  In general, the porosity of rocks in the study area ranges from fair to good.
Experimental Study of Cellulose Extraction From Oil Palm Empty Fruits Bunches Zulnazri, Zulnazri; Adha, Muhammad Ikhwanul; Dewi, Rozanna
Jurnal IPTEK Vol 26, No 1 (2022)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2022.v26i1.2353

Abstract

Empty Palm Oil Bunches is one of the non-timber solid wastes produced in the process of making palm oil. Empty palm oil bunches that have been cleaned and then hydrolyzed with HNO3 and NaNO2 are 3.5% at a temperature of 90oC. Then it was delignified by varying the concentration of NaOH 1%, 2%, 3%, 4% and using temperature variations of 40 oC, 50 oC, and 60 oC for 1 hour. Then the cellulose obtained was tested by FTIR test, XRD test, SEM test, and the yield was calculated. From the results of the FT-IR test, it is obtained that the high wave number is 2800-3300 cm-1 and the low wave number is 500-1400 cm-1. The spectrum shows a broad absorption peak located at 2800-4000 cm-1 which is a stretch of the –OH group. The highest yield content was found at a concentration of 4% NaOH at 90oC with a yield of 90.4%. The lowest yield is found at a concentration of 3% NaOH at a temperature of 60oC with a yield of 24.88%. From the results of these studies, it can be seen that the greater the concentration of NaOH used affects the cellulose produced.
Synthesis of Tilapia Feed From a Mixture of Tarum Leaves (Indigosfera sp) and Fermented Shrimp Waste by EM-4 Probiotics Hidayah, Bimantara; Alwansyah, Yuki Amru; Erliyanti, Nove Kartika; Pujiastuti, Caecilia
Jurnal IPTEK Vol 27, No 1 (2023)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2023.v27i1.4120

Abstract

Feed is the most important thing in doing a tilapia fish farming. In a feed required appropriate and balanced nutritional content so that fish growth becomes faster. Shrimp waste and tarum leaves are an alternative raw material for the manufacture of tilapia feed because they have a fairly high protein content. The purpose of this study was to examine the comparative effect of adding the percentage of tarum leaf meal and EM-4 fermented shrimp waste on water content, ash content, protein content, fat content, and crude fiber content of feed. The research method used is using the EM-4 fermentation process on shrimp waste. The variations carried out were the concentration of the addition of EM-4 (14,16,18,20, and 22 ml) and the percentage of addition of Wet Shrimp Waste (WSW) and Tarum Leaf Powder (TLP) (90%WSW + 10%TLP, 80%WSW + 20%TLP, 70%WSW + 30%TLP, 60%WSP + 40%TLP, and 50%WSW + 50%TLP). The results showed that the addition of fermented WSW EM-4 and TLP had a significant effect on the protein, fat and crude fiber content, while the water and ash content did not have a significant effect. The best tilapia feed formulation results were obtained at a ratio of 60% WSW and 40% TLP using 18 ml of EM-4 with the results obtained for water, ash, protein, fat and crude fiber content each of 7.09%. ; 12.59%; 29.98%; 7.45%; and 3.49%.
Soil Improvement Planning Combination of Preloading and Stone Column (Case Study) in Sidorukun District, Gresik, Jawa Timur Kusumaningrum, Dewi; Sri Utami, Gati; Catur Atmaja, Johan
Jurnal IPTEK Vol 25, No 2 (2021)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2021.v25i2.2128

Abstract

The subgrade is the essential part of the construction process, such as access to factories, to develop industrial factory in areas to be developed, one of which in the Gresik area. Not all construction site has met the requirement. Hence, need soil improvement with a combination of preload and stone column. The soil parameters show the results of field and laboratory tests that the area has a small value NSPT with a thickness of the soft bottom layer up to a depth of 20 meters. This research is planned the initial height (Hinitial) to have stability analysis of un-reinforcement embankment, the diameter, and the distance from the stone column with the Xstab program. The results of the calculations carried out for the construction height of the embankment (Hfinal) 3.50 meters, then the first dam (HInitial) of 4.60 m is required. The tilt stabilization is obtained (MR = 168.7 tonm), wherein The Radius of the Slope area is 11.62 meters and the Safety Factor (SF = 0.881), where there is a possibility to slide. Planning preload with a stone column with a diameter of 1.00 meters needs to be combined, a distance of 1.50 meters installed in the subgrade.
Land Arrangement with the Theme of Bioclimatic Architecture at the Durian Fruit Agrotourism Development Center in Ngoro District, Jombang Regency, East Java Syarifudin, Syahrian Najma Alif; W, Wiwik Widyo; Oktafiana, Brina
Jurnal IPTEK Vol 26, No 2 (2022)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2022.v26i2.3302

Abstract

Ngoro Subdistrict is an area with potential in the development of Agrotourism in Jombang Regency. which is famous for its agricultural products in the form of superior durian fruit, and is one of the largest durian fruit production areas in East Java. Ngoro Subdistrict has an area of 49.86 km² which is dominated by rice fields (42%), followed by settlements (19%), forests (18%), moor (12%), and others. The soil conditions in the area are textured with napal sand loam or belong to the type of soil in the reddish-brown and lysotol mediteran complexes, where this soil condition is very suitable for planting plantations. The agro-tourism land arrangement in Ngoro District is designed in such a way with a land order that has natural nuances and is also creative. The orientation of the building mass and the laying of vegetation on the site are also considered to form a microclimate as well as support thermal comfort through passive shading and cooling, as well as being an accommodating area in various educational and tourist activities. Bioclimatic architecture has been applied to the design of land orders, namely conditioning the environment and adapting climate as well as human behavior in the interaction between humans and the environment. It is hoped that in the future it can provide benefits for the local community as well as the environment, aiming that local and domestic tourists can also enjoy the facilities in this agro-tourism. On the other hand, the design of durian fruit agrotourism in Ngoro is also to encourage and increase the income and welfare of the people in the area.Keywords: Ngoro Subdistrict; Jombang; Land Order; Bioclimatic; Agrotourism.
Cover, Editorial Board, Table of Contents editorial tim, editorial tim
Jurnal IPTEK Vol 29, No 1 (2025)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2025.v29i1.7939

Abstract

Identification of Isoklinal Folds Against the Effect of Sumateran Fault Force In Air Batu Village And Surrounding Merangin Jambi Geopark Ritonga, Magdalena; Prayoga, Tobi
Jurnal IPTEK Vol 26, No 1 (2022)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2022.v26i1.2999

Abstract

The Merangin area, in particular, has experienced several tectonic phases and stages of change in the direction of the regional structure. In addition, on this island found, rocks of the Paleozoic age, their unique tectonic, geological system and constituent rocks will produce fascinating geological reconstructions. The unique tectonic design and constituent stones will have an absorbing geological reconstruction. The research methods include literature review, field observations, measurements, and studio analysis. Based on the literature and the research location approach, the research area is located in the physiographic zone of the Sumatera fault. Based on field observations, it is known that the constituent rocks are sedimentary, pyroclastic materials and intrusive granite rocks. The formations that arrange these rocks are the Mengkarang formation (Permian), the Tantan granite formation (Jurassic-Cretaceous), and the Kasai Formation (Tertiary). The fault data that passes through the building is the Sumatran fault with the position of Strike/Dip N322°E/76°, Bearing N135°E, and Rake 36°. This regional fault resulted in ductile rocks being repeatedly folded with an orientation approaching West-East; this can be observed in one of the fold data with the general direction of flank 1 N2850E/440 and the general rule of side 2 N136°E/42°. The result of the analysis is an anticline; this anticline occurs repeatedly and is referred to as an isoclinal fold perpendicular to the orientation direction of the Sumatran Fault. The pattern and movement of those folds and faults are by following under the concept of the wrench fault, which states that the fault strongly influences the formation of folds. Those folds will be perpendicular to the fault pattern.
Making Biochar from Coffee Grounds and Powder Waste Through the Torrefaction Process and Adding NaHCO3 Faturrahman, Muhammad; Zulnazri, Zulnazri; Dewi, Rozanna
Jurnal IPTEK Vol 29, No 1 (2025)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2025.v29i1.6666

Abstract

This research examines biochar manufacture from waste coffee grounds and wood dust using the dry torrefaction method with a temperature ratio of  250°C  and 300°C. The adhesive used at 5% shows a calorific value of 6,786 cal, volatile matter 81.82%adb, water content 1.79%ar, and ash content 9.52%adb. Meanwhile, the adhesive at 7% obtained a calorific value of 6,264 cal, water content of 3.9%ar, volatile matter 81.82%ab, and ash content of 14.29%adb. The results of the functional group analysis with FT-IR of the two torrefaction biobriquettes showed the presence of CH and OH groups originating from cellulose compounds, indicating that the carbon quality in the torrefaction charcoal is still high. Activated charcoal products produced through torrefaction are briquettes using tapioca flour adhesive to be molded as bio briquettes, and the results are tough and not easily broken.
Design of Preventive Maintenance System for A Product Design Lab using Reliability Centered Maintenance (RCM) Methodology Marpaung, Bintang Rachel Aprilia; Manik, Yosef; Siboro, Benedikta Anna Haulian
Jurnal IPTEK Vol 25, No 2 (2021)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2021.v25i2.2369

Abstract

The product design and innovation laboratory, which is still relatively new, does not yet have a maintenance model to anticipate damages that may occur in the future. The purpose of this research is to build preventive maintenance to anticipate unwanted events such as sudden damage and Standard Operational Procedure (SOP) for laboratory facilities. The method used is Reliability Centered Maintenance (RCM) using EasyFit 5.5 software, obtained a repair schedule with minimum downtime. The results of the Reliability Centered Maintenance (RCM) method obtained maintenance recommendations in the form of Condition Directed (CD) on 14 components that might damage the product design and innovation laboratory facilities, Finding Failure (FF) on 8 components that might damage the design laboratory facilities. products and innovations and Time Directed (TD) on 5 components that may cause damage to product design and innovation laboratory facilities, and also Based on the results of preventive maintenance built, there is a Standard Operational Procedure (SOP) which includes the use of laboratory facilities following work instructions for the use of equipment, use of facilities the laboratory follows the work instructions for use, all validation results must be stored in the form of records in the form
Numerical Investigation of Fluid In 2D and 3D Lid-Driven Cavity at Different Reynolds Numbers Beu, Maria Margareta Zau; Chen, Jiahn Horng
Jurnal IPTEK Vol 27, No 1 (2023)
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2023.v27i1.3427

Abstract

The lid-driven cavity is an important fluid mechanical system that serves as a benchmark for testing numerical methods and for studying fundamental aspects of incompressible flow in a confined volume. This paper is concerned with the numerical calculation of the LDC on the 2-D and 3-D model. The commercial software ANSYS Fluent was used for the simulation. In these models of the simulated cases, the lid moves in the x-direction. The 2-D solutions for the driven cavity are calculated for 10 ≤ Re ≤ 35,000 with a 501 × 501 and 601 × 601 grid. The driven 3-D cavity is calculated with a 75 × 75 × 75 grid. The steady flow inside the cavity consists of the velocity distributions at different Reynolds numbers. The present numerical results agree well with the literature analytical solutions.

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