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All Journal IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Journal of Industrial Engineering Management Kinetika Jurnal Media Teknik dan Sistem Industri
Moulita, RA Nurul
Politeknik Negeri Sriwijaya
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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BIODIESEL PROCESS PRODUCTION FROM WASTE COOKING OIL USING MICROWAVES AND HIGH VOLTAGE Trisnaliani, Lety; Moulita, RA Nurul
KINETIKA Vol. 8 No. 3 (2017): KINETIKA 01112017
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (313.529 KB)

Abstract

Increasing fuel demand has an impact for decreasing fossil energy reserves. One of the government ways to solve this problem is by increasing the production of biomass fuels, for example biodiesel. Biodiesel can be produced from waste cooking oil through the transesterification stage that reacts oil molecules with alcohol and catalyst to produce methyl esters. Heating method that can be used is microwaves method. This method utilizes wave emission which is absorbed by the sample to make sample’s temperature being higher than surface’s temperature of the reactor’s wall. In the process of making biodiesel, there are several factors that affected heating process. There are ratio of waste cooking oil and methanol, an amount of catalyst, reaction temperature, voltage, and distance of electrodes. The effect of that factors can be seen from the result of the biodiesel’s rendement. From this research, we had ratio 5:1 of waste cooking oil and methanol got 85,. % rendement, 2% of catalyst got 87.12% rendement, 60oC reaction temperature got 88.88% rendement, 10 kV got 89.12% rendement, and 1 cm of electrode’s distance got 86.34% rendement. This result suggests that a biodiesel production prototype with microwaves and high voltage utilization can produce a high percentage of biodiesel rendement
Biodiesel Production from Waste Cooking Oil using Induction Heating Technology RA Nurul Moulita; Rusdianasari Rusdianasari; Leila Kalsum
IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Vol 5, No 1 (2020): February 2020
Publisher : IJFAC (Indonesian Journal of Fundamental and Applied Chemistry)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24845/ijfac.v5.i1.13

Abstract

Kerupuk and kemplang industries produce at least 65 liters of waste cooking oil per production. One form of the application of science and technology in the field of new and renewable energy can be done in processing the waste oil from industrial production through the conversion process into one of the environmental friendly alternative fuels, biodiesel. Biodiesel production process can be carried out by various methods, such as utilizing induction heating technology. This technology has non-contact properties that do not interfere with the reactions that occur because of its application, which produces heat from the workpiece. This study uses waste cooking oil as raw material with variations in the molar ratios 1:3, 1:4, 1:5, 1:6, and 1:7. The analysis showed that the maximum biodiesel production was used of 1: 7 molar ratio with 86.95% yield, 0.86 gr/cm3 of density, 5.73 cSt of viscosity, 190oC of flash point, and 0.44 mg-KOH/gr of acid number. The using this ratio produces maximum yield and following SNI.
Penerapan Statistical Quality Control (SQC) dalam Usulan Perbaikan Kualitas Roti Sobek Manis PT. XYZ Moulita, RA Nurul; Suryani, Faizah
Jurnal Media Teknik dan Sistem Industri Vol 8, No 1 (2024)
Publisher : Universitas Suryakancana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35194/jmtsi.v8i1.2901

Abstract

Increasing demand for bread in Indonesia during the epidemic era has motivated bakeries to make high-quality bread that satisfies their own standards in order to keep up with consumer demand. As one of the branch bread makers in Indonesia, PT. XYZ consistently works to ensure that the bread they create satisfies the parent company's criteria in order to retain their profitability. By reducing the quantity of defective bread products produced, the quality of the bread can be managed. With recommendations for company-wide improvements, Statistical Quality Control (SQC) can be used as a way to monitor the quality of bread produced. The results showed that defects of sweet torn bread produced by PT. XYZ was dominated by 1,484 dented loaves. This defects product is caused by depanning process and displacement of bread which is still done manually. Factors that influence the quality of sweet torn bread produced by PT. XYZ is tool, method, and people. Improvement efforts that can be done by PT. XYZ in minimizing quantity defects of sweet torn bread products is like carrying out regular maintenance on packing machines, conducting training for workers before entering the section field, and providing position exchanges at work to mitigate workers feeling tired. Jumlah permintaan roti di Indonesia yang meningkat di era pandemi memacu para produsen roti untuk memenuhi permintaan pasar dengan memproduksi roti yang berkualitas dan sesuai dengan standar perusahaan. PT. XYZ sebagai salah satu cabang produsen roti di Indonesia selalu berusaha untuk dapat menjaga kualitas roti yang mereka produksi agar sesuai dengan standar induk perusahaan sehingga profit yang terima tidak mengalami penurunan. Roti yang berkualitas dapat dikendalikan dengan upaya meminimalkan jumlah produk cacat roti yang diproduksi. Statistical Quality Control (SQC) dapat digunakan sebagai metode dalam mengendalikan kualitas roti yang diproduksi dengan usulan perbaikan yang dapat dilakukan oleh perusahaan. Hasil penelitian menunjukkan bahwa produk cacat roti sobek manis yang diproduksi PT. XYZ didominasi oleh roti yang penyok sebanyak 1.484 buah. Cacat produk ini disebabkan oleh proses depanning dan pemindahan roti yang masih dilakukan secara manual. Faktor-faktor yang berpengaruh pada kualitas roti sobek manis yang diproduksi PT. XYZ berupa faktor alat, metode, dan manusia. Upaya perbaikan yang dapat dilakukan PT. XYZ dalam meminimalkan jumlah produk cacat roti sobek manis adalah melakukan perawatan secara berkala pada mesin packing, mengadakan pelatihan untuk pekerja sebelum terjun ke lapangan, serta memberikan pertukaran posisi dalam bekerja untuk memitigasi pekerja merasa kelelahan.  
Analysis of Tofu Liquid Waste and Rice Washing Water Combination in Microbial Fuel Cell (MFC) System Using Taguchi Experimental Design Moulita, RA Nurul; Suryani, Faizah
Journal of Industrial Engineering Management Vol 9, No 2 (2024): Journal of Industrial Engineering and Management
Publisher : Center for Study and Journal Management FTI UMI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jiem.v9i2.1791

Abstract

Tofu production generates residue in the form of liquid sewage, which is frequently disposed of in sewers. This has the potential to pollute streams and emit a distinct stench that may disturb the neighboring population. Tofu liquid waste can be converted into electrical energy using a Microbial Fuel Cell (MFC) technology. MFC uses the metabolic activity of microorganisms to transform organic chemicals in the substrate into electrical energy. This study will use Taguchi experimental design to provide recommendations for the optimal composition of the substrate usage ratio, incubation period, and addition of bioactivators, as well as their effect on the electrical power produced in MFC system using a combination of tofu liquid waste and rice washing water as the substrate. According to the findings of the research, the parameter with the greatest influence is incubation period (74.81%), followed by addition of bioactivator (19.45%), and substrate ratio (5.46%). The optimal composition is recommended to be incubated for one day with a 5% bioactivator addition and an 80:20 substrate ratio of tofu liquid waste and rice washing water.
Co-Authors Leila Kalsum Lety Trisnaliani Rusdianasari Rusdianasari Suryani, Faizah