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All Journal JURNAL KIMIA SAINS DAN APLIKASI Eksergi: Chemical Engineering Journal Jurnal Chemurgy Jurnal Teknologi Pertanian Jurnal Ilmiah Teknik Kimia MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering REACTOR : Journal of Research On Chemistry And Engineering Journal of Industrial Community Empowerment SAINTI: Majalah Ilmiah Teknologi Industri Journal Of Chemical Process Engineering PATRIOTIK: Jurnal Inovasi dan Pemberdayaan Masyarakat Jati Emas (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat)
Yahya, Agung Kurnia
Politeknik ATI Padang
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Comparison of Different Types of Bleaching Earth on the Quality of Bleaching Palm Oil (BPO) Khairati, Miftahul; Aini, Apsari Puspita; Nurmalasari, Enny; Yahya, Agung Kurnia
Eksergi Vol 22 No 1 (2025)
Publisher : Prodi Teknik Kimia UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/eksergi.v22i1.13311

Abstract

Bleaching Earth (BE), primarily derived from Bentonite, is widely used in the bleaching process of Crude Palm Oil (CPO). Its efficiency depends on the proportions of SiO₂ and Al₂O₃, which enable effective pigment absorption. This study evaluates the performance of unmodified Bentonite, nano SiO₂-modified Bentonite, and commercial BE in producing Bleached Palm Oil (BPO). The novelty lies in the nano SiO₂ modification, designed to enhance the structural properties and absorption capabilities of Bentonite. Characterization of BE was conducted using Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM), while BPO quality was assessed through parameters like moisture content, acid value, Free Fatty Acid (FFA) levels, (Deterioration of Bleachability Index (DOBI), and β-carotene concentration. The results showed that BPO processed with nano SiO₂-modified Bentonite had the lowest β-carotene concentration (443%) and a DOBI value of 1.453, demonstrating superior bleaching performance compared to unmodified and commercial BE. Other parameters, including FFA levels and moisture content, exhibited minimal variation. Color analysis revealed that BPO processed with nano SiO₂-modified Bentonite achieved a comparable color value (1.5/15) to commercial BE. These findings highlight the potential of nano SiO₂-modified bentonite for improving oil quality by reducing FFA and acid value while maintaining optimal moisture content, offering a novel and effective alternative to unmodified bentonite in oil refining.
Evaluation of Temperature Effect on Kernel Silo Dryer Towards Kernel Moisture Content at PT PQZ Aini, Apsari Puspita; Sanjaya, Nady; Yahya, Agung Kurnia; Miftahurrahmah, MIftahurrahmah
Jurnal Chemurgy Vol 9, No 2 (2025): Jurnal Chemurgy-Desember 2025
Publisher : Universitas Mulawarman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30872/cmg.v9i2.23164

Abstract

This study aims to evaluate the effect of temperature on the Kernel Silo Dryer toward the moisture content of palm kernels at PT XYZ. Moisture control in palm kernels is crucial to ensuring optimal crude palm kernel oil (CPKO) quality. The drying process using a Kernel Silo Dryer was conducted at varying temperatures of 40°C, 50°C, and 60°C for three hours. Results indicated that higher drying temperatures resulted in lower kernel moisture content. At 60°C, the kernel moisture content reached the desired standard below 7%. However, at 40°C and 50°C, the moisture content exceeded the specified limit, increasing the risk of mould growth and reducing kernel quality. Key factors influencing drying efficiency include heater condition, steam pressure from the Back Pressure Vessel (BPV), and equipment cleanliness. Therefore, temperature optimisation and proper maintenance are essential to improve drying efficiency and maintain kernel quality.
PENGARUH SAPONIFIKASI TERHADAP KUALITAS SABUN CAIR DARI MINYAK JARAK DENGAN SURFAKTAN SLS DAN CAPB Maftukhah, Siti; Amyranti, Mutia; Nurlatifah, Ismi; Yahya, Agung Kurnia; Arlianti, Lily
SAINTI: Majalah Ilmiah Teknologi Industri Vol. 22 No. 1 (2025)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/sainti.v22.i1.61

Abstract

Tanaman jarak banyak tumbuh di lahan-lahan pekarangan milik masyarakat di pedesaan dan belum banyak dimanfaatkan secara komersial. Biji jarak diekstrak dapat menghasilkan minyak yang dapat dimanfaatkan menjadi sabun dengan busa yang lembut. Tujuan dari penelitian ini adalah mengetahui pengaruh perbandingan minyak jarak : KOH dan lama waktu penyabunan terhadap nilai pH dan asam lemak bebas. Prosedur penelitian ini adalah persiapan bahan baku yang meliputi analisis minyak jarak, KOH, sodium lauryl sulfat dan cocamydopropyl betain. Selanjutnya dilakukan proses pembuatan sabun dan terakhir analisis sabun yang dihasilkan. Hasil penelitian menunjukkan bahwa jumlah alkali yang rendah mengakibatkan proses penyabunan membutuhkan waktu lebih lama dan semakin lama waktu penyabunan maka semakin rendah pH sabun cair serta semakin tinggi bilangan asamnya. Sabun cair dihasilkan pada kondisi optimum sesuai dengan SNI 06-4085-1996 yaitu sabun yang dibuat dengan perbandingan minyak jarak : KOH 1 : 0,98 dengan waktu penyabunan 75 menit dan suhu 70 0C, dengan pH 9,13 dan kadar asam lemak bebas 0,2210.
The Packaging Process Improvement in MSME's by Utilizing Packaging Machine Technology and Product Packaging Redesign: Perbaikan Proses Pengemasan di UMKM dengan Pemanfaatan Teknologi Mesin Pengemasan dan Desain Ulang Kemasan Produk Ari Pranata Primisa Purba; Nofan Hadi Ahmad; Agung Kurnia Yahya; Miftahurrahmah; Tosty Maylangi Sitorus; Anang Baharuddin Sahaq
JATI EMAS (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat) Vol. 8 No. 4 (2024): Jati Emas (Jurnal Aplikasi Teknik dan Pengabdian Masyarakat)
Publisher : DPD Jatim Perkumpulan Dosen Indonesia Semesta

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

Abstract

The understanding and compliance with the regulations of the Drug and Food Supervisory Authority (BPOM) in the food industry, especially for Micro, Small and Medium Enterprises (MSMEs) in Indonesia should be a concern for entrepreneurs so that the products produced are acceptable to modern society today. The packaging process is one of the efforts to maintain the quality, safety and hygiene of products, also as a medium of promotion and information of products marketed to consumers. MSMEs Kampioen becomes an object in the community service activities carried out by the Team of Polytechnic ATI Padang due to the eligibility of partners and business permits that already meet the existing legality. Observations and interviews were conducted to find out the obstacles experienced by MSMEs. The obstacles facing MSMEs are products that have not yet been able to compete to the supermarket because the unqualified packaging of supermarkets and BPOM. The packaging machines used are old enough and almost broken. In this context, the graphical design of packaging that meets BPOM standards and the use of Continuous Band Sealer technology is an important factor in improving competitiveness and market access for MSME. These activities ensure the benefits of accompanying activities, such as improved efficiency and production safety, improved understanding of business management, finance, and marketing, and expansion of marketing. Thus, these activities provide practical guidance and specific solutions to help MSMEs boost growth and competitiveness in the food industry sector.
Fermentasi Kopi Robusta Dengan Lactococcus lactis subsp.Untuk Meningkatkan Kualitas Rasa Kopi Enny Nurmalasari; Kusmiyati; Agung Kurnia Yahya; Agnes Heratri; Sinju Kunikazari
REACTOR: Journal of Research on Chemistry and Engineering Vol. 5 No. 2 (2024)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v5i2.157

Abstract

Fermentation in coffee provides new modulation to the taste and sensory profile of coffee, thereby enhancing its flavor quality. Lactic Acid Bacteria (LAB) strains are used for fermentation in the wet process and have been proven to improve the overall flavor of the coffee. Therefore, in this study, coffee fermentation will be carried out using Lactococcus lactis subsp. to improve coffee flavor quality. The study begins with preparing the starter medium, starter culture, and fermentation. Subsequently, proximate analysis and a cupping test are conducted to assess the flavor profile of the coffee. The results of this study show that coffee fermentation can increase the number of LAB with longer fermentation times. Furthermore, proximate results indicate that fermented Robusta coffee contains 7.86% less fat compared to non-fermented Robusta coffee, which has 15.02% fat. The cupping test results for fermented Robusta coffee reveal a total score of 81, with the clean cup and uniformity aspects scoring 10. This total is higher than that of non-fermented Robusta coffee, thus proving that fermentation using Lactococcus lactis subsp. can improve coffee flavor quality.
ANALISA HEAD LOSS DAN KERJA POMPA DENGAN VARIASI PERUBAHAN DIAMETER PADA SISTEM PEMIPAAN Agung Kurnia Yahya; Puji Rahayu; Hasnah Ulia; Achmad Yanuar Maulana
SAINTI: Majalah Ilmiah Teknologi Industri Vol. 19 No. 2 (2022)
Publisher : Politeknik ATI Padang

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

Abstract

Fluida sering kali mengalami kehilangan energi (head loss) di dalam pipa karena adanya turbulensi aliran yang mengakibatkan gesekan di permukaan pipa bagian dalam. Head loss sangat merugikan dalam sistem pemipaan karena dapat menurunkan tingkat efisiensi aliran fluida. Head loss dipengaruhi oleh variasi belokan (elbow), sambungan, katub (valve), dan diameter pipa. Tujuan dalam penelitian ini adalah mengetahui head loss yang terjadi di tiap line pada sistem pemipaan aliran fluida yang terdiri dari variasi luas penampang pipa, jumlah sambungan, katub, dan belokan. Selain itu juga untuk mengevaluasi kerja pompa dengan pada rangkaian seri maupun kompleks. Semakin kecil ukuran diameter menyebabkan kecepatan fluida meningkat sehingga menyebabkan friksi yang ada dalam pipa semakin besar, hal tersebut menyebabkan head loss semakin besar. Kerja pompa yang dibutuhkan untuk mengalirkan fluida berbanding lurus dengan besarnya head loss yang terjadi pada sistem pemipaan.
Evaluation of the Stability of the Anaerobic Digestion Process of POME Based on the Correlation of VFA, Alkalinity and Methane Content Anang Baharuddin Sahaq; Agung Kurnia Yahya; Resi Levi Permadani; Salwa Asyifa; Aulia Firda Alfiana
MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Vol 8 No 1 (2026): Motivection : Journal of Mechanical, Electrical and Industrial Engineering
Publisher : Indonesian Mechanical Electrical and Industrial Research Society (IMEIRS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46574/motivection.v8i1.529

Abstract

Palm Oil Mill Effluent (POME) contains a high organic load and requires effective treatment to prevent environmental pollution while enabling energy recovery. Anaerobic digestion is widely applied for POME treatment due to its ability to reduce organic pollutants and produce methane-rich biogas; however, its performance is highly dependent on process stability. This study aims to evaluate the stability of the anaerobic digestion process of POME through correlation analysis among volatile fatty acids (VFA), total alkalinity (TA), suspended solids (SS), and methane content (CH₄) using field operational data. The study was conducted at an industrial-scale biogas plant treating POME, where slurry samples were collected periodically from multiple biodigester units representing different digestion stages. VFA and TA were analyzed using acid–base titration, SS by gravimetric method, and methane content using a gas analyzer. The results show that the anaerobic digestion process operated under stable mesophilic conditions (35 ± 2 °C) with reactor pH maintained in the optimal range of 6.8–7.5. VFA concentrations remained relatively low (approximately 480–510 mg/L), supported by sufficient alkalinity (about 5,600 mg/L as CaCO₃), resulting in a low VFA/TA ratio (~0.09), indicating stable process conditions. A significant reduction in COD from approximately 41,700 ppm in the influent to about 7,200 ppm in the effluent was achieved, corresponding to a COD removal efficiency of 83%. Methane content in the biogas remained stable at ≥55%, supporting effective energy utilization without flaring. These results demonstrate that maintaining a balanced relationship among VFA, alkalinity, suspended solids, and operating conditions is essential for ensuring stable anaerobic digestion and consistent biogas quality in industrial-scale POME treatment systems.
EVALUASI KINERJA PLATE HEAT EXCHANGER DI REFINERY PLANT INDUSTRI MINYAK GORENG Agung Kurnia Yahya; Rivaldo Romigo; Puji Rahayu; Apsari Puspita Aini; Hasnah Ulia
SAINTI: Majalah Ilmiah Teknologi Industri Vol. 20 No. 1 (2023)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/sainti.v20i1.203

Abstract

Plate Heat Exchanger (PHE) merupakan salah satu elemen yang mempunyai peran penting dalam efisiensi energi di PT. XYZ. Di PT. XYZ terdapat permasalahan pada alat PHE, di mana laju alir fluida panas pada alat tersebut cenderung mengalami penurunan tiap waktunya, hal tersebut dapat menyebabkan perpindahan panas antara fluida panas dan fluida dingin tidak optimal sehingga terjadi penurunan kinerja pada alat. Kinerja alat PHE dapat ditinjau dari efektivitasnya, jika kinerja PHE menurun maka dapat menyebabkan peningkatan konsumsi energi sehingga biaya yang dikeluarkan juga meningkat. Penelitian ini bertujuan untuk menghitung efektivitas PHE tipe 605A yang digunakan sebagai penukar panas antara crude palm oil dan refined bleached deodorized palm oil di PT. XYZ dan didapatkan efektivitas pada saat ini berkisar 81,77% - 86,13%. Tetapi efektivitas PHE mengalami penurunan tiap waktunya dan diprediksi akan menurun menjadi 75% pada hari ke-11. Rekomendasi yang dapat diberikan dalam penelitian ini yaitu perawatan dan pembersihan rutin, monitoring kinerja plate heat exchanger secara real-time, serta kaji ulang beban kerja sistem heat plate exchanger
Co-Authors Achmad Yanuar Maulana Achmad Yanuar Maulana Agnes Heratri Aini , Apsari Puspita Aini, Apsari Puspita Amyranti, Mutia Anang Baharuddin Sahaq Apsari Puspita Aini Apsari Puspita Aini Apsari Puspita Aini Arlianti, Lily Aulia Firda Alfiana Eko Supriadi Enny Nurmalasari Ferry Ikhsandy Hana Nikma Ulya Harmiwati N. H Hasnah Ulia Hasnah Ulia Heratri, Agnes Hibrah Hibrah Hibrah Hibrah, Hibrah Khairati, Miftahul Kubikazari, Sinju Kusmiyati Kusmiyati Kusmiyati Luthfi , Muhammad Zulfikar Miftahul Khairati Miftahurrahmah Miftahurrahmah Miftahurrahmah, Miftahurrahmah Muhammad Zulfikar Luthfi N. H, Harmiwati N. H. , Harmiwati N. H., Harmiwati N.H, Harmiwati Nofan Hadi Ahmad Nurlatifah, Ismi Nurmalasari , Enny Oktria, Dandi Permadani , Resi Levi Permadani, Resi Levi Puji Rahayu Puji Rahayu Puji Rahayu Purba, Ari Pranata Primisa Putra, Renold Ramadhan Rahayu , Puji Renold Ramadhan Putra Resi Levi Permadani Rivaldo Romigo Romigo, Rivaldo Ronald Sukwadi Rosalina Rosalina Rosalina Salwa Asyifa Sanjaya, Nady Sinju Kunikazari Siti Maftukhah Sri Kaidah Surya, Dhanu Fransgio Pratama Tosty Maylangi Sitorus Tosty Maylangi Sitorus, Tosty Maylangi Ulia, Hasnah Yunita Fahni