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All Journal Justek : Jurnal Sains Dan Teknologi CHEESA: Chemical Engineering Research Articles AXIOM : Jurnal Pendidikan dan Matematika MAJAMATH: Jurnal Matematika dan Pendidikan Matematika Sang Pencerah: Jurnal Ilmiah Universitas Muhammadiyah Buton Jurnal Review Pendidikan dan Pengajaran (JRPP) JURNAL ANALIS LABORATORIUM MEDIK Jurnal Riset Teknologi Pencegahan Pencemaran Industri REACTOR : Journal of Research On Chemistry And Engineering Jurnal Pendidikan dan Teknologi Indonesia Jurnal Pengabdian Kepada Masyarakat Jurnal Sains dan Teknologi Journal of Engineering Science and Technology International Journal of Applied Research and Sustainable Sciences (IJARSS) JURNAL VOKASI TEKNIK (JUVOTEK) Jurnal Pengabdian Masyarakat dan Riset Pendidikan Jurnal Ilmiah Teknik dan Sains (JITS)
Dimas Frananta Simatupang
Program Studi Teknik Kimia, Politeknik Teknologi Kimia Industri Medan
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Sintesis Biooil dari Limbah Pelepah Kelapa Sawit Berbasis Metode Pirolisis Hendra Saputra; Ahdiat Leksi Siregar; Rahma Yusni Oktavia; Dimas Frananta Simatupang
REACTOR: Journal of Research on Chemistry and Engineering Vol 4, No 1 (2023): Published in June 2023
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v4i1.68

Abstract

Biooil is a liquid obtained from cracking lignocellulose structures into simpler compounds from the pyrolysis process. The lignocellulose content in palm midrib can be used as a raw material for making biooil. This study examines the effect of the length of time burning at a temperature of 250 ℃ on the physical and chemical characteristics of the resulting biooil. The independent variable was pyrolysis time with 1 hour, 2 hours, and 3 hours. The parameters used to determine the quality of biooil are specific gravity, pH, color, and composition of biooil by GC-MS instrument. From the results obtained, the highest yield of biooil was 7.9945% from sample with 2 hours pyrolysis time. The quality of biooil showed the average pH ranged between 2.65–3.08 and the average density ranged from 1.0485 to 1.1055. The visual of biooil was dark brown color with the largest biooil content being Cis-Vaccenic acid.
Determination of Cooling Water Requirement for Plastic Film Extrusion Process at PT. XYZ North Sumatra Paranita, Darni; Donda, Donda; Simatupang, Dimas Frananta
Justek : Jurnal Sains dan Teknologi Vol 6, No 4 (2023): Desember
Publisher : Unversitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/justek.v6i4.20319

Abstract

Abstract:  The cooling water is a liquid medium used to cool down plastic film after it undergoes melting in the plastic film extrusion process. This research aims to determine the required amount of cooling water needed to cool the plastic film before it enters the cutting process. The research method involved collecting primary data from the factory and determining the heat and cooling water requirements using thermodynamic equation calculations. The results indicate that a flow rate of 475 kg/hour of plastic film releases heat into the cooling water at an average rate of 19175.9043 kcal/hour, with an average cooling water requirement of 983.366925 L/hour.Abstrak: Air pendingin merupakan media cairan yang digunakan untuk pendinginan film plastik setelah mengalami peleburan pada proses ekstrusi film plastik. Penelitian ini dilakukan dengan tujuan untuk menentukan jumlah air pendingin yang diperlukan untuk mendinginkan film plastik sebelum nantinya masuk ke dalam proses pemotongan. Metode penelitian dengan pengumpulan data primer dari pabrik dan menenetukan panas serta kebutuhan air pendingin dengan kalkulasi persamaan termodinamika. Hasil menunjukkan bahwa sebanyak 475 kg/jam laju alir kapasitas film plastik melepas panas ke air pendingin dengan rata-rata sebesar 19175,9043 kkal/jam dengan kebutuhan air pendingin rata-rata sebesar 983,366925 L/jam.
Penentuan Kebutuhan Poli Aluminium Klorida pada Proses Penjernihan Air di Unit Water Treatment PT. XYZ Kuala Tanjung Nelza, Novia; Sebayang, Mariani; Yunianto; Simatupang, Dimas Frananta
INSOLOGI: Jurnal Sains dan Teknologi Vol. 2 No. 6 (2023): Desember 2023
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v2i6.2783

Abstract

A Water Treatment Unit (WTU) is a station that works on the processing and conditioning of raw water to meet the desired water quality. Water purification at PT. XYZ Kuala Tanjung uses raw water sourced from surface water or rivers. The river water used still contains solid substances and organic matter that render the water unsuitable for industrial use. Both suspended and colloidal solid substances can cause turbidity. Turbidity caused by solid substances can be addressed using coagulation techniques. The purpose of this research is to determine the optimal concentration and dosage of coagulant to clarify water in the WTU. The coagulant used is polyaluminum chloride (PAC). The research method is based on experiments using jar tests and stoichiometric calculations. The determination of the optimal coagulant is measured based on turbidity parameters. Experiments are conducted with varying concentrations of PAC ranging from 25-65 ppm, and the smallest turbidity value obtained is 1.21 NTU at a PAC concentration of 65 ppm, with a PAC requirement of 202.6679 kg/day. The higher the PAC concentration, the clearer the resulting water, but the daily requirement for PAC also increases.
Analisis Kebutuhan Batu Bara pada Unit Dryer dalam Pengeringan Pupuk NPK di PT AGS Medan Simatupang, Dimas Frananta; Yunianto, Yunianto; Sihaloho, Erwin Dani Winata
CHEESA: Chemical Engineering Research Articles Vol. 4 No. 1 (2021)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v4i1.7830.11-17

Abstract

PT. AGS Medan merupakan pabrik yang bergerak dalam produksi pupuk NPK yang salah satu produknyaadalah formula 12.12.17 dengan komposisi 12% unsur nitrogen, 12% unsur fosfor dan17% unsur kalium. Salah satu tahapan dalam proses pembuatan pupuk NPK yaitu proses pengeringan. Jenis dryer yang digunakan adalah rotary dryer dengan putaran 5 rpm dan kemiringan 20o. Pengering yang digunakan adalah udara panas yang berasal dari pembakaran batu bara jenis bitminious di dalam furnace.Untuk menentukan jumlah batu bara yang dibutuhkan dalam proses pengeringan pupuk NPK sebagai bahan bakar furnace maka diperlukan perhitungan jumlah panas. Pengambilan sampel, analisis kadar air dan suhu serta menghitung panas dengan prinsip neraca massa dilakukan dalam penelitian ini. Berdasarkan perhitungan yang telah dilakukan untuk mengeringkan pupuk NPK dengan kapasitas pupuk NPK 7000 kg/jam dibutuhkan energi sebesar 6136268,402Kkal/jam. Jumlah bahan bakar yang dibutuhkan untuk mengeringkan pupuk NPK adalah sebesar 789,219kg/jam.
Determination of Content and Oil Losses in Meal through Palm Kernel Pressing Process at PT XYZ Belawan Simatupang, Dimas Frananta; Ginting, Maulidna; Agrifa, Utami Nanda; Sitinjak, Anna Angela; Simbolon, Merta
CHEESA: Chemical Engineering Research Articles Vol. 5 No. 2 (2022)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v5i2.9255.65-73

Abstract

PT XYZ Belawan has a kernel crushing plant unit that produces Crude Palm Kernel Oil (CPKO) with 700 tons/day capacity. Palm kernel processing is carried out in two pressing stages. The first stage or first press produces oil and cake, while the second stage or second press produces oil and meal. The meal still contains 7-8% of the oil content. This study is aimed to determine the amount of CPKO yield, oil content, and oil losses in a meal during the pressing palm kernel process. The method used was the calculation of the mass balance in each process flow. The mass balance calculation is carried out after collecting the secondary data from the factory, including the analysis of water content, solids, FFA, and oil content. Based on the calculation results, CPKO yield was 48.10% of the average kernel mass rate of 714.7155 tons and met the plant standard of at least 44%. Furthermore, the average yield of oil content from the meal was 7.45% and oil losses were 3.86%.
Titik Equilibrium Bebas dari Penyebaran Hoax Pemilu Lewat Media Sosial Tiktok Sitinjak, Anna Angela; Purba, Switamy A.; Tampubolon, Ferdinan Rinaldo; Frananta S, Dimas; Sidabutar, Naqasya Asyrori
MAJAMATH: Jurnal Matematika dan Pendidikan Matematika Vol. 7 No. 2 (2024): Vol. 7 No. 2 September 2024
Publisher : Prodi Pendidikan matematika Universitas Islam Majapahit (UNIM), Mojokerto, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36815/majamath.v7i2.3209

Abstract

Election issues are sensitive information among the society because they relate to people's survival in terms of work, economy and education. Election hoaxes where information whose truth cannot be ascertained becomes a weapon used by certain parties to bring down political opponents. Social media such as TikTok is a media that is often used to spread hoaxes because TikTok social media users come from various ages and there is no distance or time between users. In this paper, a mathematical model is presented to see how the equilibrium point is to be free from hoax based on the basic reproduction number R0. The spread of hoaxes on social media occurs if R0 > 1 and does not occur if R0 < 1. The model approach used is the SEIR mathematical model because it is seen that there are people who receive hoax videos (exposed) and then spread them without finding out the truth (infected), and users with this condition it needs to be recovered. The method used in this research is a literature review. The results obtained show that the mathematical model presented shows that the basic reproduction number R0 is zero (R0 < 1). This means that there will be no spread of election hoaxes
Analysis of Neutron Radiation Absorption Capacity of Coir Fiber Composite Board as A Neutron Radiation Shield Sitepu, Evi Christiani; Simatupang, Dimas Frananta
Jurnal Riset Teknologi Pencegahan Pencemaran Industri Vol. 16 No. 1 (2025): May
Publisher : Balai Besar Standardisasi dan Pelayanan Jasa Pencegahan Pencemaran Industri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21771/jrtppi.2025.v16.no1.p1-8

Abstract

Research has been conducted on the radiation shielding capability of coir fiber composite boards to determine the extent of neutron radiation absorption as it passes through the created radiation shield. This study aims to ascertain whether coir fiber can be used as a filler in the production of radiation shields. Initial analysis was conducted using SEM-EDX, FTIR, and XRD testing. The results indicated that the primary component of coir fiber is carbon at 70.68%, which is structured in chemical bonds of cellulose, hemicellulose, and lignin. Additionally, coir fiber retains a crystalline region observed at the peak of 2θ=22.4°, with a crystallinity degree of 35.46%, suggesting its potential for neutron radiation absorption. After fabricating the composite board, it was tested using the Neutron Activation Analysis method to evaluate its neutron radiation absorption capability. The analysis results showed that the absorption capacity of the composite board at a fiber mass fraction of 2.0 g ranged from 59.4 to 97.8%; at 3.0 g from 64.3 to 98.3%; and at 4.0 g from 73.5 to 99.3%. The linear attenuation coefficients (µ) for each coir fiber fraction were found to be 3.84; 4.13; and 4.80/cm, with half-value layers of 0.18; 0.17; and 0.14 cm, respectively, demonstrating that coir fiber can be utilized as a filler for neutron radiation shielding.
Penyuluhan Pembuatan Ekoenzim dan Sabun Cair Berbasis Ekoenzim di Kelurahan Medan Tenggara: Pengabdian Dimas Frananta Simatupang; Anna Angela Sitinjak; Darni Paranita; Donda; Derry CS Purba; Switamy Angnitha Purba; Ratna Kristina Tarigan
Jurnal Pengabdian Masyarakat dan Riset Pendidikan Vol. 3 No. 4 (2025): Jurnal Pengabdian Masyarakat dan Riset Pendidikan Volume 3 Nomor 4 (April 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Salah satu dari kegiatan Tridharma Perguruan Tinggi adalah melakukan Pengabdian Kepada Masyarakat (PKM) yang mengaplikasikan ilmu dan teknologi yang sesuai dengan bidang dan kepakaran perguruan tinggi atau program studi masing-masing. Kegiatan PKM ini bertujuan untuk memberikan informasi mengenai pembuatan ekoenzim yang memiliki banyak manfaat bagi lingkungan dan pembuatan produk turunannya yaitu sabun cair dari bahan baku ekoenzim yang dapat digunakan dalam kehidupan sehari-hari atau bahkan bisa dikomersialisasikan serta dapat meningkatkan ekonomi masyarakat. Kegiatan PKM difokuskan di lingkungan Kelurahan Medan Tenggara dengan peserta ibu-ibu PKK pada bulan September 2024. Kegiatan PKM berjalan dengan lancar dan seluruh peserta antusias mengikuti dan praktek langsung pembuatan ekoenzim. Pembuatan ekoenzim berasal dari bahan-bahan yang sangat mudah ditemukan yaitu sampah organik rumah tangga berupa limbah segar kulit buah-buahan dan sayur-sayuran. Selain itu, pembuatan produk turunannya berupa sabun cair juga menggunakan ekoenzim sebagai bahan baku utama dan beberapa senyawa kimia sebagai campurannya.
Sintesis Biooil dari Limbah Pelepah Kelapa Sawit Berbasis Metode Pirolisis Saputra, Hendra; Siregar, Ahdiat Leksi; Oktavia, Rahma Yusni; Simatupang, Dimas Frananta
REACTOR: Journal of Research on Chemistry and Engineering Vol. 4 No. 1 (2023)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v4i1.68

Abstract

Biooil is a liquid obtained from cracking lignocellulose structures into simpler compounds from the pyrolysis process. The lignocellulose content in palm midrib can be used as a raw material for making biooil. This study examines the effect of the length of time burning at a temperature of 250 ℃ on the physical and chemical characteristics of the resulting biooil. The independent variable was pyrolysis time with 1 hour, 2 hours, and 3 hours. The parameters used to determine the quality of biooil are specific gravity, pH, color, and composition of biooil by GC-MS instrument. From the results obtained, the highest yield of biooil was 7.9945% from sample with 2 hours pyrolysis time. The quality of biooil showed the average pH ranged between 2.65–3.08 and the average density ranged from 1.0485 to 1.1055. The visual of biooil was dark brown color with the largest biooil content being CisVaccenic acid.
Pengaruh Dosis Aluminium Sulfat Terhadap Kekeruhan dan Kadar Besi Air Baku pada IPA PDAM X Simatupang , Dimas Frananta; Saragih , Gimelliya; Siahaan , Martin
REACTOR: Journal of Research on Chemistry and Engineering Vol. 2 No. 1 (2021)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/

Abstract

One of the first steps in processing river water into drinking water is by removing the turbidity of the river water. Turbidity can be removed by adding a chemical called a coagulant. This study aims to obtain data on how the effect of using coagulant dosage variations in reducing turbidity and iron content in raw water at the water treatment plant (IPA) PDAM X. The study was conducted using the jar test method to determine the dose of aluminum sulfate coagulant in reducing turbidity and colorimetric method using visible spectrophotometry to determine iron content that meets quality standard criteria. The results showed that the higher the coagulant dose, the lower the turbidity and iron content of the raw water. Coagulant doses with up to 30 ppm were able to reduce turbidity with an efficiency of 92.67% and reduce iron levels up 96.10%.
Co-Authors Agrifa, Utami Nanda Ahdiat Leksi Siregar Azhar Basyir Rantawi Darni Paranita Darry C.S Purba Derry CS Purba Donda Donda Donda Donda, Donda Ginting, Maulidna Hasiholan Valentinus Putra Abhel Halawa, Manotona Hendra Saputra Hendra Saputra Ing Mayfa Situmorang Jua, Selestina Kostaria Martin Siahaan Merta Simbolon Nelza, Novia Nuranika Nuranika Oktavia, Rahma Yusni Paranita, Darni Pratama Saragih, Koko Purba, Switamy A. Rahardja, Istianto Budhi Rahma Yusni Oktavia Ramadhani Ramadhani Rantawi, Azhar Basyri Ratna Kristina Tarigan Ratna Kristina Tarigan Saragih , Gimelliya Saragih, Gimelliya Sebayang, Mariani Siahaan , Martin Sidabutar, Naqasya Asyrori Sihaloho, Erwin Dani Winata Simbolon, Merta Siregar, Ahdiat Leksi Sitepu, Evi Christiani Soherawati Rospa Ginting Switamy Angnitha Purba Tampubolon, Ferdinan Rinaldo Tarigan, Ratna Kristina Wiranda Panggabean Yunianto Yunianto Yunianto