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All Journal JURNAL KIMIA SAINS DAN APLIKASI Walisongo Journal of Chemistry Ihsan: Jurnal Pengabdian Masyarakat INVENTORY : Industrial Vocational E-Journal On Agroindustry REACTOR : Journal of Research On Chemistry And Engineering Jurnal Sains dan Teknologi Jurnal Universal Technic Journal of Industrial Community Empowerment Student Research Journal Jurnal Sains dan Teknologi Jurnal Multidisiplin Indonesia International Journal of Mathematics and Science Education
Eko Supriadi
Politeknik ATI Padang
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Pengendalian Kualitas Proses Pengemasan Gula Karung Menggunakan Metode Statistical Process Control (SPC) Rizaldi Sardani; Devi Faradila; Suci Oktri Viarani M; Eko Supriadi
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol 1, No 1 (2020): Published in June 2020
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v1i1.19

Abstract

Quality is a benchmark to determine the level of good and bad of a product. The level of quality of a product will affect customer satisfaction, hence, to produce high quality products, it is necessary for a company to have a quality control process. Quality control is a process that aims to maintain the quality of products and services that have been promised to consumers. In this study, quality control is carried out in the sugar packaging process. Where in the sugar packaging process found the resulting product has a poor quality, defective and not in accordance with specifications. This study uses the Statistical Process Control (SPC) method which aims to determine the causes of defective products with the intention that the packaging process can further minimize the level of product defects. The SPC method is a statistical analysis technique with seven statistical tools or seven tools. Based on the results of the study it can be seen that the cause of product damage / defects in the product packaging process is caused by three types of damage namely damage due to conveyor (38.17%), damage due to machine pinched (35.82%), and damage due to loose seams (26,00%) This type of damage can be caused by human error and other factors such as engine condition, engine cleanliness and the monitoring process. Proposed improvements recommended for the company are to provide training to employees, make clear work instructions, conduct periodic maintenance for the machines used, supervise all work areas, and carry out quality control for every acceptance of raw materials.
Pengaruh Doping Ca dan K pada γ-Al2O3 terhadap Sifat Fisik Katalis pada Transesterifikasi Minyak Kelapa Eko Supriadi; Danawati Hadi Prajitno; Mahfud Mahfud; Ngatijo Ngatijo; Rahmat Basuki
REACTOR: Journal of Research on Chemistry and Engineering Vol 2, No 1 (2021): Published in June 2021
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v2i1.20

Abstract

Metal doping plays important role in increasing catalytic activity of catalyst materials. In this work, Ca and K were doped to the γ-Al2O3 by dry impregnation method to study the crystallinity, surface area, activation energy, and yield in the coconut oil transesterification reaction. The success of doping was shown in the characterization of Ca/γ-Al2O3 and K/γ-Al2O­3 using X-Ray Diffraction (XRD) which increasing in crystallinity from 62.2% (γ-Al2O3) to 69.3 (K/γ-Al2O3) and 76.0 (Ca/γ-Al2O3). The emerging peak of 2θ characteristics of K (29.70° and 32.65°) and Ca (25.35°, 26.77°, and 27.17°) on the γ-Al2O3 (37.66°, 45.82° and 67.22 °) was also observed. Characterization by the Surface Area Analyzer (SAA) shows that the K/γ-Al2O3 catalyst has a smaller surface area (34.03 m2/g) than Ca/γ-Al2O3 (83.77 m2/g), but a higher pore diameter (66.12 Å) than Ca/γ-Al2O3 (35.22 Å). The K/γ-Al2O­3 catalyst produced greater FAME yield (93.19%) than Ca/γ-Al2O3 (29.76%) at a catalyst concentration of 2.5%, reaction time 150 s, and ultrasonic frequency of 40 kHz. The quality of the FAME catalyzed by K/γ-Al2O­3 fulfills four test parameters: density, kinematic viscosity, flash point, and pour point according to SNI 04-7182-2006 standards.
Produksi Biofuel Berbantuan Ultrasonik dari Minyak Kelapa Terkatalisis Ca/γ-Al2O3 dan K/γ-Al2O3 Eko Supriadi; Rahmat Basuki; Danawati Hadi Prajitno; Mahfud Mahfud
Walisongo Journal of Chemistry Vol 4, No 1 (2021): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v4i1.7861

Abstract

Penelitian ini bertujuan untuk membandingkan doping Kalium (K) dan Kalsium (Ca) pada support γ-Al2O3 dalam produksi biofuel yang berbentuk fatty acid methyl ester (FAME) melalui reaksi transesterifikasi minyak kelapa berbantuan ultrasonik. Reaksi dilakukan dalam tipe reaktor batch dengan perbandingan mol minyak kelapa:etanol = 1:9, dan variasi konsentrasi berat katalis untuk masing-masing katalis K/γ-Al2O­3 dan Ca/γ-Al2O3 terhadap minyak kelapa (0,5%; 1,0%; 1,5%; 2% dan 2,5%), waktu reaksi (30, 60, 90, 120 dan 150 detik), dan frekuensi ultrasonik (20 dan 40 KHz). Keberhasilan doping ditunjukkan pada hasil karakterisasi K/g-Al2O3 ­dan Ca/g-Al2O3 menggunakan X-Ray Diffraction (XRD) yang menghasilkan puncak 2θ karakteristik K (29,70° dan 32,65°) dan Ca (25,35°, 26,77°, dan 27,17°) pada support g-Al2O3 (37,66°, 45,82° dan 67,22°). Karakterisasi menggunakan Surface Area Analyzer (SAA) menunjukkan bahwa katalis K/g-Al2O3 memiliki luas permukaan yang lebih kecil (34,03 m2/g) dibanding Ca/g-Al2O3 (83,77 m2/g), namun diameter pori yang lebih besar (66,12 Å) dibanding Ca/g-Al2O3 (35,22 Å). Katalis K/g-Al2O3 menghasilkan yield FAME yang lebih besar (93,19%) dibanding Ca/γ-Al2O3 (29,76%) pada konsentrasi katalis 2,5%, waktu reaksi 150 detik dan frekuensi ultrasonik 40 kHz. Kualitas FAME terkatalisis K/g-Al2O3 yang dihasilkan memenuhi empat parameter uji: densitas, viskositas kinematic, titik nyala, dan titik tuang sesuai dengan standar SNI 04-7182-2006.
Production of Biogas with Two-Stage Fermentation of Cow Dung-Palm Oil Mill Effluent NH, Harmiwati; Supriadi, Eko; Rahmad, Dedy; Akbar, Addin; Khairati, Miftahul; Amrin, M. Zhafran Zharif; Adi, Tegar Trikora; Suhardito, Ibnu; Hidayat, Salsabila Alifia; Phuong, Nguyen Thi Thanh
Walisongo Journal of Chemistry Vol 6, No 1 (2023): Walisongo Journal of Chemistry
Publisher : Department of Chemistry Faculty of Science and Technology Walisongo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/wjc.v6i1.13541

Abstract

In this research, biogas is produced from Palm Oil Mill Effluent (POME) by fermentation of cow dung using a stirred reactor and purified by various CO2 and H2S removal techniques. The variables in this study were: composition of cow dung (55%, 60%, 65%, 70%, 75%, 80% w/w), amino acid composition (0.5%, 1%, 1.5% w/w) and length of fermentation time (2, 6, 10, 14, 16 days). The fixed variables were stirring speed (100 rpm), temperature (30oC) and reactor volume (100 L). This research also investigated the effect of using a lime packed reactor on the purity of methane gas. From the results of first stage of fermentation, it was found that the optimum composition of cow dung-POME was at 60% and the fermentation time was 14 days. In the second stage of fermentation using optimum results at first stage compared to fermentation of cow dung without POME, the results of measuring the gas pressure produced in 60% cow dung-POME fermentation were 17.5 Psig greater than fermentation of cow dung without POME of 15 Psig.
Perancangan Dan Pembuatan Mesin Penggiling Bahan Baku Dalam Upaya Meningkatkan Kapasitas Produksi Pada UKM Produk Makanan Ringan Lubis, Rizki Fadhillah; Purba, Ari Pranata Primisa; Sitorus, Tosty Maylangi; Miftahurrahmah, Miftahurrahmah; Supriadi, Eko
IHSAN : JURNAL PENGABDIAN MASYARAKAT Vol 4, No 2 (2022): Ihsan: Jurnal Pengabdian Masyarakat (Oktober)
Publisher : University of Muhammadiyah Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/ihsan.v4i2.12044

Abstract

Peningkatan kapasitas produksi menjadi salah satu upaya Usaha Kecil dan Menengah untuk memuaskan konsumen dalam hal target produksi, efesiensi waktu, meningkatkan daya saing dan mempertahankan eksistensi perusahaan. UD. RANTI merupakan salah satu UKM yang memproduksi makanan ringan berbahan ubi kayu. Permasalahan yang dihadapi saat ini adalah sebagian proses produksi mulai input sampai dengan output tidak sesuai dengan spesifikasi yang dipersyaratkan Dinas Kesehatan, salah satunya proses penggilingan. Minimnya pengetahuan dalam merancang mesin peralatan produksi dan minimnya modal dalam pengadaan peralatan tersebut menambah bagian permasalahan dari mitra usaha ini. Melalui Program Kemitraan Masyarakat ini tim menawarkan solusi untuk merancang dan membuat mesin penggiling sebagai upaya pemecahan masalah tersebut. Tahapan pelaksanaan kegiatan yang direncanakan seperti: Analisis Situasi pada Unit Usaha, Merancang dan membuat mesin penggiling, Melakukan pelatihan pengoperasian dan maintenance mesin sekaligus penyerahan mesin kepada Unit Usaha, Evaluasi Program Kegiatan. Hasil yang didapat dari kegiatan ini berupa mesin penggiling bahan baku yang sesuai dengan persyaratkan Dinas Kesehatan dimana mesin/peralatan produksi harus menggunakan bahan stainless steel agar tidak terjadi cemaran logam pada bahan baku makanan. Dalam hal produktivitas, terjadi peningkatan dalam hal waktu produksi yang lebih singkat. Diharapkan dengan Program Kemitraan Masyarakat ini dapat meningkatkan produktivitas atau kapasitas produksi dari unit Usaha Kecil dan Menengah dalam hal ini UD. RANTI.
Perancangan Digester Biogas dari Kotoran Sapi dan Limbah Cair Tahu dengan Sistem Sirkulasi Oktria, Dandi; ., Rosalina; Supriadi, Eko
Jurnal Sains dan Teknologi (JSIT) Vol. 4 No. 3 (2024): September - Desember
Publisher : CV. Information Technology Training Center - Indonesia (ITTC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47233/jsit.v4i3.2312

Abstract

Biogas is renewable energy consisting of 55-65% methane, 35-55% carbon dioxide, and 0.1-3% hydrogen sulfide. advantage of biogas lies in its abundant availability. Biogas is produced anaerobically using organic raw materials mediated by microbes. The biogas production process consists of four stages, namely hydrolysis, acetogenesis, and methanogenesis. supporting materials used are 150 liters and 55 liters HDPE drums, ½ in the pipe, ¾ in the pipe, ½ in T the pipe connection, ½ in the pipe elbow, ½ in the pipe valve, ¾ in thread socket, 1 bar pressure gauge, 1 bimetal thermometer required, water pump. The tools used include pH meters and gas detectors. CSTR-type digester uses a pump as the circulation system. The advantages of using a circulation pump are maintaining operating temperature, increasing material contact, inhibiting sedimentation, and reducing fermentation time. In the design of the Digester tool, a gal holder is also used as a container for the biogas produced by the Digester during operation, the result of variations in circulation which are carried out every 4 days, and the addition of raw materials every day is 3 liters/day, 1.5 liters of cow dung and 1.5 liters of tofu liquid waste resulted in variation 0 circulations 41% methane, pressure 0.1, COD value 13,200, variation 30 circulations 52% methane, pressure 0.16, COD value 11,792, variation 60 circulations 55% methane, pressure 0 .18, and a COD value of 10,560, and at variation 90 circulations 58% methane is produced, a pressure of 0.19, and a COD value of 7,040.
Pengaruh Sistem Sirkulasi terhadap Produksi Biogas dari Kotoran Sapi dan Limbah Cair Tahu M. Zhafran Zharif Amrin; Rosalina Rosalina; Eko Supriadi
Student Research Journal Vol. 3 No. 1 (2025): Student Research Journal
Publisher : Sekolah Tinggi Ilmu Administrasi (STIA) Yappi Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/srj-yappi.v3i1.1712

Abstract

To improve the performance of a biogas Digester, several methods can be employed, one of which is by adding a circulation system [1]. Circulation in the Digester helps distribute the substrate and microorganisms evenly [2], thereby accelerating biological reactions and releasing gas, thus enhancing biogas productivity [3]. The objective of this study is to design and analyze the impact of a circulation system on a biogas Digester during the fermentation of liquid tofu waste and cow manure. The research was conducted in two stages: first, designing the Digester, and second, operating the Digester in two steps. The first step involved batch fermentation for 14 days to condition the degrading microorganisms. The second step involved continuous fermentation for 16 days, operated with a circulation system at varying rates of 0, 30, 60, and 90. The variables studied included digester pressure, CH4 concentration, and COD reduction. The results showed that circulation increased biogas productivity, with the best variation achieved using 90 circulation, resulting in a pressure of 0.19 kg/cm², 58% CH4, and 33.33% COD reduction.
Influence Decrease in Chemical Oxygen Demand (COD) Against Biogas Quality and Production Eko Supriadi; Ailsya Nadya Rizki
International Journal of Mathematics and Science Education Vol. 1 No. 4 (2024): November : International Journal of Mathematics and Science Education
Publisher : Asosiasi Riset Ilmu Matematika dan Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/ijmse.v1i4.94

Abstract

Chemical Oxygen Demand or Need Oxygen chemistry is amount oxygen is needed for waste organic matter in the water can​ oxidized in a way chemistry . Chemical Oxygen Demand (COD ) have the value which is size For level pollution by material organic . COD value contained in material standard such as palm oil mill effluent can converted into biogas due to its high value so that allow For produce high biogas production . On study This done data collection in direct that is with using secondary data and primary data. From the research that has been done , known that  The more high COD Removal then the more The quality of the methane gas produced is also high . This is can seen based on at COD removal of 81%, it was obtained methane gas quality by 67%. And, increasingly high COD lowered so the more The biogas production produced is also high . This is can seen based on on COD reduction of 797,716 kg resulted in biogas production of 478,629 m3.
Prototype Digester Berpengaduk dan Sensor Pendeteksi Gas methane Berbasis IoT Muhammad Zhaky; Eko Supriadi
Jurnal Sains dan Teknologi Vol. 3 No. 2 (2024): Desember : Jurnal Sains dan Teknologi
Publisher : Fakultas Teknik Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58169/saintek.v3i2.675

Abstract

Spentwash, a liquid waste byproduct of bioethanol production, is a potential raw material for biogas production due to its high organic content and abundant availability. PT Energi Agro Nusantara (ENERO) utilizes spentwash through anaerobic digestion processes to produce biogas, which is used as an alternative energy source.However, optimizing biogas production still faces various challenges, including the need for efficient monitoring and increased production volume. Internet of Things (IoT)-based technology offers a solution through real-time monitoring systems, enabling direct and accurate methane level measurements.This study aims to develop a prototype of a stirred digester equipped with an IoT-based methane gas detection sensor, using the MQ-2 sensor to detect methane gas.
Prototype Biodigester Biogas dengan Sistem Monitoring Berbasis Internet of Things (IoT) Muhammad Zhaky; Dinda Asyifa; Eko Supriadi; Oktrison Oktrison
Jurnal Universal Technic Vol. 4 No. 1 (2025): Jurnal Universal Technic
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/unitech.v4i1.3112

Abstract

Biogas is a renewable energy source with significant potential to reduce dependence on fossil fuels. However, conventional biodigester systems still face several challenges in monitoring methane gas production. Therefore, this research aims to design and develop a biogas digester prototype equipped with a stirrer and an Internet of Things (IoT)-based sensor to detect methane (CH4) gas levels. The research methodology involves designing a biodigester with an automatic stirrer and an MQ-2 sensor that can detect methane gas levels in real time. The data obtained is transmitted via ESP32 and displayed on the Blynk application. The research results show that the designed system can increase methane gas production and allow remote monitoring. The conclusion of this study is that the integration of IoT technology in the biodigester system can improve production efficiency and safety in biogas utilization.
Co-Authors ., Rosalina Addin Akbar Adi, Tegar Trikora Ailsya Nadya Rizki Amrin, M. Zhafran Zharif Danawati Hari Prajitno Dedy Rahmad Devi Faradila Dinda Asyifa Dwi Kemala Putri Ferry Ikhsandy Hibrah, Hibrah Hidayat, Salsabila Alifia Khairati, Miftahul M. Zhafran Zharif Amrin Mahfud Mahfud Mahfud Mahfud Miftahurrahmah Miftahurrahmah, Miftahurrahmah Muhammad Zhaky Muhammad Zulfikar Luthfi N.H, Harmiwati Nadya Rizki, Ailsya Ngatijo Ngatijo NH, Harmiwati Oktria, Dandi Oktrison Oktrison Phuong, Nguyen Thi Thanh Purba, Ari Pranata Primisa Rahmad, Dedy Rahman, Edriza Rahmat Basuki Rizaldi Sardani Rizki Fadhillah Lubis Rosalina Rosalina Rosalina Rosalina Suci Oktri Viarani Suhardito, Ibnu Surya, Dhanu Fransgio Pratama Tosty Maylangi Sitorus, Tosty Maylangi Yahya, Agung Kurnia