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All Journal Seminar Nasional Teknik Kimia Kejuangan Sainteks: Jurnal Sain dan Teknik Composite
Johannes Martua Hutagalung
Universitas Insan Cendekia Mandiri
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Engineering Environmental Science Industrial & Manufacturing Engineering Veterinary Other

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Simulasi Pembuatan Etil Asetat Menggunakan ReactiveDividing Wall Column Dengan Katalis Asam Sulfat Johannes Martua Hutagalung
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2015: Prosiding SNTKK 2015
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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

Abstract

Reactive Dividing Wall Column (RDWC) is an innovation which integrate reaction and distillations into one unit. The purpose of this study aims to simulate both reboiler duty and distillate rate to obtain the purity of ethyl acetate, water, and acetic acid in the stream products usingAspen Plus simulation software. RadFrac modul is used to model vapor –liquid equilibrium in the column and NRTL model is used to calculate thermodynamic properties in the liquid and vapor phases. The model has been validated by comparing both temperature as well as product composition profiles to those of open literature. The simulation results show that varying the distillate rate (D) and reboiler duty (Qr) will affect the purity of distillate components (ethyl acetate), side product (water) and bottom component (acetic acid). Based on maximum purity ofethyl acetate, the operating conditions are respectively recommended at distillate rate of 74.902 mole/h and reboiler duty of 1.93 kW. The product compositions are 73.69 mol% ethyl acetate, 90.21 mol% water and 42.98 mol%acetic acid.
Perbandingan Model Characteristic Drying Rate Curve dan Reaction Engineering Approach Berdasarkan Hasil Eksperimen Pengeringan Mango Tissues Johannes Martua Hutagalung
Sainteks: Jurnal Sain dan Teknik Vol 1 No 2 (2019): September
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v1i2.127

Abstract

Dry Processing was generally consist of two model mathematics, emphirical and mechanistic model. CDRC (Characteristic Drying Rate Curve) and REA (Reaction Engineering Approach) are one of mechanistic model to find physic condition in all term, which is emphirical model hasn’t. The results obtained by simulation are shown with the temperature profile and the moisture content of mango tissues that has previously been validated according to the literature. Mean square error and explained variation value showed similarity value between moisture content and temperature. Experiment data for REA using drying temperature at 338K and Y at 0,0134kg H2O/kg dry air. CDRC is divided by two approaching model, Constant Rate Period (CRP) and Falling Rate Period (FRP) at temperature 338K. To find the relative activation energy as amount of losing moisture content, temperature used at 328K. The result showed are CDRC and REA model relatively similar, which is CDRC closer to experiment data. For drying curve, moisture content of mango tissues is descending exponentially at the time of drying. But for temperature curve against time of drying, temperature of mango tissues is ascending exponentially.
Pemodelan Pengeringan Menggunakan Microwave Dengan Model Relative Energy Activation (REA) Untuk Pengeringan Kacang Hijau Berbentuk Sphere Johannes Martua Hutagalung
Sainteks: Jurnal Sain dan Teknik Vol 4 No 1 (2022): Maret
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v4i1.386

Abstract

One of the advantages of the REA model is that the relative activation energy equation obtained from the experimental data can be used for other drying conditions with the same initial material and moisture content. Through convective data, an equation of activation energy is obtained which will be used for drying the data using a microwave. The simulation carried out is to compare the model data with experimental data of a microwave with a power of 0.25 W/g and a drying air temperature of 50 0C, then a power of 0.7 W/g and a drying temperature of 70 0C. increasing with microwave, the higher the value of the heat transfer coefficient (h) the simulation results are getting closer to the experimental data for the initial period of development, even making experimental data with increasing time.
Potensi limbah kulit dan biji rambutan (Nephelium lappaceum L) sebagai bioetanol Johannes Martua Hutagalung; Galu Murdikaningrum; Melinda Yulianti; Shinta Nurcahyani
Composite : Jurnal Ilmu Pertanian Vol 5 No 2 (2023): Agustus
Publisher : University of Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/composite.v5i2.578

Abstract

In view of information on rambutan creation which is expanding, the misuse of rambutan strips and seeds is likewise expanding. Remembering that rambutan strips and seeds contain a few mixtures that can be utilized as elective unrefined components in the production of bioethanol. This study aims to determine the effect of variations in the addition of yeast on the yield and content of bioethanol, and also to determine the maximum mass of the addition of yeast to acquire the biggest yield and ethanol content. This research went through 5 stages, first stage is the readiness of the skin and seeds of rambutan, second stage is α-cellulose detachment, third step is hydrolysis with 1% HCl to create glucose which will be analyzed using Benedict's reagent and the Luff-Schoorl method. Qualitative analysis showed positive results and glucose levels obtained were 22.39% with a glucose yield of 1.50%. The fourth stage is glucose fermentation by using five days with variations in yeast weight of 5, 6 and 7 grams. The fifth step is to separate the resulting bioethanol by distillation and determine alcohol content using an alcohol refractometer. Yield bioethanol obtained by varying the weight of yeast 5, 6, and 7 grams respectively was 1.05%, 1.18%, and 1.67% with the levels of bioethanol obtained 1.95%, 2.15%, and 3.00%. The highest yield and content of bioethanol were obtained by adding 7 grams of yeast. The yield obtained on this bioethanol is 1.67% and the bioethanol content is 3.00%. Keywords: bioethanol, cellulose, fermentation, hydrolysis, rambutan peels.
Production of Transparent Solid Antibacterial Soap from Palm Oil Using Eco-Enzyme Murdikaningrum, Galu; Ramadhan, Adisti; Astari, IIs Ananda; Ningtyas, Rani Pramudyo; Hutagalung, Johannes Martua
Sainteks: Jurnal Sain dan Teknik Vol 6 No 2 (2024): September
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v6i02.792

Abstract

Abstract: Hygiene is essential in daily life, and soap is vital for effectively cleansing contaminants and bacteria from the skin. Recent innovations in soap-making, including the development of transparent soaps, aim to enhance both functionality and aesthetic appeal. This study explores the incorporation of eco-enzyme, derived from the fermentation of kitchen waste such as fruits, vegetables, sugar, and water, into transparent antibacterial soap. Eco-enzyme contains lipase, trypsin, and amylase, which are effective in inhibiting pathogenic bacteria. The adoption of eco-enzyme not only enhances the sustainability of soap production but also promotes the efficient use of organic waste. This research conducted a laboratory-based experimental investigation to evaluate the effectiveness of eco-enzyme in the production of transparent solid antibacterial soap using palm oil. The process involved several stages: preparation of raw materials, soap production, and subsequent analysis. The results demonstrated that the soap met SNI standards with water content ranging from 12% to 17%, a pH between 9.57 and 9.81, and free fatty acids ranging from 0.9% to 1.7%. The inhibition zone for Staphylococcus aureus was 7.81 mm, indicating a moderate antibacterial effect. These findings suggest that eco-enzyme provides a bacteriostatic effect, inhibiting bacterial growth without necessarily killing the bacteria, and highlight its potential for developing sustainable and effective antibacterial products. Keywords: antibacterial soap, eco-enzyme, Staphylococcus aureus.
Synthesis Oxalic Acid from Durian skin (Durio Zibethinus) with Alkali Smelting Method Hutagalung, Johannes Martua
Sainteks: Jurnal Sain dan Teknik Vol 6 No 1 (2024): Maret
Publisher : Universitas Insan Cendekia Mandiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37577/sainteks.v6i1.640

Abstract

Durian (Durio zibethinus) , nicknamed The King of Fruit, is a fruit that is quite popular in Indonesia. This prickly fruit which has a pungent aroma and distinctive taste is very popular with many people. The edible part of the fruit (percentage of fruit flesh weight) is low, which is only around 20.52%, this means that there are around 79.48% which is the part that is not utilized for consumption such as the skin and seeds of the durian fruit. So, there is a lot of durian skin waste that will be produced. Durian fruit skin contains lignocellulosic materials, namely cellulose, hemicellulose, and lignin. Based on the data above, we want to utilize durian skin waste in research on the manufacture of oxalic acid. To make oxalic acid from durian fruit peel waste, we use the alkaline smelting method with several stages, namely: precipitation with CaCl2, acidification with H2SO4 and crystallization. The alkali used was NaOH with various concentrations of 3N, 4N, and 5N with cooking times of 30, 40, and 60 minutes at a temperature of 95oC. The optimum concentration of NaOH and optimum melting time to make oxalic acid from durian fruit peel waste was at the solution concentration. NaOH 4N and a time of 60 minutes with a weight % Yield of 6,95%.
Co-Authors Astari, IIs Ananda Galu Murdikaningrum Melinda Yulianti Ningtyas, Rani Pramudyo Ramadhan, Adisti Shinta Nurcahyani