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Jurnal Ilmiah Teknik Kimia
Published by Universitas Pamulang
ISSN : 25490699     EISSN : 2685323X     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
Fokus dan Lingkup Jurnal i lmiah Teknik Kimia yaitu pengolahan limbah, teknologi pangan dan material, proses pemisahan, teknik reaksi kimia, dan nanopartikel. Jurnal Ilmiah Teknik Kimia Universitas Pamulang terbit 2 kali dalam setahun yaitu pada bulan Januari dan Juli.
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Articles 122 Documents
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Analisis Kinerja Turbin Uap Sebelum dan Setelah Proses Overhaul di PT PERTAMINA GEOTHERMAL ENERGY Area Kamojang Elli Prastyo; Indah Dhamayanthie
Jurnal Ilmiah Teknik Kimia Vol 6, No 1 (2022): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v6i1.14492

Abstract

One of the important components in geothermal power generation is steam turbines. One of the decreases in steam turbine performance is caused by excessive workload due to continuous operation. Maintenance of steam turbines through important overhauls is carried out to improve the performance of steam turbines. Actual conditions with ideal conditions are important to know and analyze to know the performance of steam turbines. The operational performance of steam turbines at PT Pertamina Energi Geothermal Area Kamojang can be seen from the value of turbine working specifications (Wt), and isentropic efficiency (ηt). Parameters in the form of inlet pressure (P1), outlet pressure (P2), inlet temperature (T1), outlet temperature (T2), and flow rate (m/s) are searched using the ChemicalLogic SteamTab application and linear interpolation methods to determine the value of enthalpy and entropy. The results were obtained that the value of isentropic enthalpy (h2s) before the overhaul amounted to 2,127.41 kJ/kg and after an overhaul of 2,145.91 kJ/kg. Turbine power value (Ẇt) before overhaul was 30,702.88 kW and after overhaul was 36,304.7 kW. Efficiency after overhaul decreased ±1.4% of efficiency before the overhaul.
Pengaruh Waktu Fermentasi dan pH Terhadap Kandungan Nitrogen, Kalium, dan Fosfor dalam Pupuk Cair Organik Dari Limbah Kulit Pisang (Musa paradisiacal) Mubarokah Nuriaini Dewi; Dody Guntama; Rizky Perdana; Muhammad Fauzan
Jurnal Ilmiah Teknik Kimia Vol 6, No 1 (2022): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v6i1.14667

Abstract

Fruit peel waste is a big problem nowadays because the production of waste is getting bigger as the population grows. On the other hand, fruit peel waste contains elements of N, P, K which can be used to make organic fertilizer. This research was conducted by mixing water, banana peel waste and EM-4 bacteria with the fixed variables used were banana peel waste and the amoufant of EM-4 bacterial bio activator while the independent variables used in this study were the fermentation time for (2 days, 4 days and 6 days). days), with variations in initial pH (4 and 5). Testing of organic fertilizers was carried out based on the standard method of SNI 2803. Testing of nitrogen content using the Kjeldahl method, phosphorus levels as P2O5 using a UV-Vis Spectrophotometer, potassium as K2O using an Atomic Absorption Spectrophotometer (AAS) instrument. The results showed that the best level of nitrogen was 1,297.43 ppm and the best level of phosphorus was 86 ppm which was produced on the second day of fermentation with a variation of initial pH 4. While the best potassium level was obtained by a variation of initial pH 5 at a fermentation time of 6 days, namely 11,735.6 ppm. Based on the analysis of the levels of N, P, K that was carried out, the organic fertilizer produced did not meet the SNI specifications.
Karakteristik Pati Talas Banten yang Dimodifikasi Menggunakan Asetat Anhidrida Ahmad Wibisana; Dewi Nurul Aulia; Siti Nurhidayah; Dewi Hisi Anggaraeni; Fischar Chicko
Jurnal Ilmiah Teknik Kimia Vol 6, No 1 (2022): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v6i1.15549

Abstract

Taro beneng (Xanthosoma undipes k.koch) is a tuber plant originating from Pandeglang. Taro tubers have a high starch content so they are the potential to be used in various industrial applications such as in the fields of food, textiles, paper, and others. In general, the use of natural starch for the industry has disadvantages related to its Physico-chemical characteristics. For a wider application, starch needs to be modified in order to have certain characteristics that are suitable for a certain application. In this study, a starch modification was carried out by the acetylation method using acetic anhydride. The independent variables used in this study were the ratio of acetic anhydride/dry starch (g/g): 0, 5, 10, 20%, while the dependent variables were % acetyl, degree of acetylation, swelling power, and solubility. The acetylation reaction was carried out at 35°C for 30 minutes. The results showed that starch acetylation using an acetic anhydride/starch ratio of 10 g/50 g resulted in percent acetylation (% acetyl) and degree of substitution (DS) were 4.3% and 0.16%, respectively. The highest swelling power value was 5.2 g/g, while the highest acetyl starch solubility was 1.6% which was obtained on acetylation using an acetic anhydride/starch ratio of 5/50 g/g.
Penambahan Ekstrak Etanol Buah Naga Merah (Hylocereus polyrhizus) Afkir pada Pembuatan Sabun Cair Berbasis Virgin Coconut Oil Windi Windi; Ni Ketut Sumarni; Jaya Hardi
Jurnal Ilmiah Teknik Kimia Vol 6, No 2 (2022): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v6i2.20973

Abstract

Rejected Dragon fruit (Hylocereus polyrhizus) is rich in anthocyanin compounds that can be used as additional ingredients in liquid soap formulas, thereby increasing the quality of soap as an antioxidant that protects the skin from the effects of sunlight and pollution. The purpose of this research was to determine the mass of rejected dragon fruit extract which produced liquid soap with the highest pH and foam stability and the best viscosity value. The research design used was a completely randomized design (CRD) with a factorial pattern with the independent variable being the concentration of rejected dragon fruit extract with four treatment levels of 0, 1.5, 3, and 4.5 grams of extract per 250 grams of soap formula and storage time consisting of four levels of 0, 7, 14, and 21 days. The best liquid soap formula was obtained when using a rejected dragon fruit extract concentration of 1.5 grams per 250 grams of soap formula (SW1 formula) with a foam stability value of more than 90% until 21 days of storage. Formula SW1 also has a stable pH during storage, which is in the pH range of 7 – 9. The viscosity value of the SW1 formula reaches 13.25 N/m2 with a free alkali value of 2.48%. The SW1 formula with a rejected dragon fruit extract content of 1.5 grams per 250 grams of soap formula can be developed as a new formula for the manufacture of liquid soap which is rich in antioxidant compounds.
The Effect of Solvent on The Extraction of Anthocyanin Pigment from Buni (Antidesma bunius (L) Spreng) muryanto muryanto
Jurnal Ilmiah Teknik Kimia Vol 6, No 2 (2022): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v6i2.21012

Abstract

Buni fruit (Antidesma bunius (L) Spreng) contains vitamins, anthocyanins, flavonoids, and phenolic acids. Anthocyanins are a group of red to blue pigments widely distributed in plants. Anthocyanins in Buni are dyes that can be used as alternative natural dyes. In this research, anthocyanin will be extracted from Buni. The extraction process was carried out with various solvents, which are 10% citric acid, 70% ethanol, and distilled water for three days. The results showed the total levels of anthocyanins with 10% citric acid, 70% ethanol, and distilled water was 453.05 mg/L, 410.91 mg/L, and 361.64 mg/L. Citric acid is more optimal in extracting anthocyanins in Buni. 
Performance Evaluation of Bio-CSTR for Biohydrogen Production from Palm Oil Mill Effluent (POME) Nurdiah Rahmawati; Joni Prasetyo; Galuh Wirama Murti; Tyas Puspita Rini; Atti Sholihah; Era Restu Finalis; Semuel Patisenda
Jurnal Ilmiah Teknik Kimia Vol 6, No 2 (2022): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v6i2.19462

Abstract

Hydrogen production from biomass is a prospectus energy carrier. Biohydrogen so far only shares 8% of total hydrogen production Therefore, the production of biohydrogen still has to be increased for its contribution of the total required hydrogen, especially in Indonesia, which is a tropical country and rich in biomass. This research and development would utilize POME, Palm Oil Mill Effluent, as the substrate to produce biohydrogen. The utilization of POME will give added value and solve the environmental problem as well. Based on a modified existing bio-reactor, a bio–Continuous Stirred Tank Reactor (CSTR), the production of biohydrogen was successfully conducted at a scale of 1,000 dm3 working volume. The bio-CSTR worked with impellers in 4 different levels and the substrate flew laminarly and non-stagnant. As in the first test, biogas production from POME with the majority content of CH4, the pH and COD was measured to assess the quality of this POME utilization. The product was also analyzed, especially to monitor the existence of CH4 and to assure the product bio H2. Bio CSTR was applied in the method fed-batch system. POME and some additional nutrients were fed daily. The work was conducted at least for 2 weeks based on working planning. As the result, biohydrogen is still stable in duration 18 days operations, no CH4 exist. The pH was smaller at overflow POME, decreasing maximum, from 4.9 to 4.8. This condition was considered tolerable. The H2 concentration in gas product was reached 26% and stable at 12% until the end of the experiment.
Sintesis Papan Komposit Serat Bambu Apus dan Serbuk Kayu Jati dengan Metode Hot Press untuk Aplikasi Door Trim Mobil Silviana Simbolon; Silviana Simbolon
Jurnal Ilmiah Teknik Kimia Vol 6, No 2 (2022): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v6i2.21084

Abstract

Research has been carried out on composites from apus bamboo fiber and teak wood particles for car door trim applications. The research method used is compression molding using a hot press machine and testing is based on ISO 527-2 & ASTM D790 standards. This analysis uses the independent variable, namely the ratio of the volume fraction of apus bamboo fiber and teak wood particles 10:30, 20:20, 30:10%. While the fixed variables are 60% epoxy volume fraction, hot press temperature 100°C, pressing load 30 psi, and for 20 minutes. From the tensile test data, it is found that the variation of 30:10% fiber and particles which the variation with the best result is 84.69 MPa, then followed by a variation of 20:20%, is 42.60 MPa. The two variations above the minimum standard value of high-density fiberboard SNI 01-4449-2006:5-9 is 35 MPa. While the variation of 10:30% gets a value of 21.61 MPa which is below the minimum standard. For the bending test, the variation of 30:10% is the variation with the best result, which is 60.24 MPa and is above the minimum standard. Meanwhile, the variation of 10:30% and 20:20% has the lowest bending strength value with a value of 15.43 MPa and 29.61 MPa and is still below the minimum standard that has been set. For the fracture surface results, all variations resulted in fiber pull-out failure but the 30:10% variation which has ductile fracture properties and is considered safer for car door trim applications.
Pengaruh Penambahan Filler Talc Terhadap Sifat Termal dan Massa Jenis Komposit Polipropilena/Masterbatch Black Fitria Ika Aryanti; Dheandra Azani Maghfira
Jurnal Ilmiah Teknik Kimia Vol 6, No 2 (2022): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v6i2.19471

Abstract

Polypropylene/PP is one type of thermoplastic polymer that is widely used in everyday life. The use of fillers aims to reduce production costs and improve certain properties of the polymer matrix. This study aims to study the effect of adding talc as a filler on the physical and thermal properties of PP/masterbatch black (PP/MB Black) -based composites with percentages of 0, 5, 10, 15, and 20%. PP was mixed with 4% black MB Black and talc, then processed using injection molding. The composite product was then tested for thermal properties using Differential Scanning Colorimetry (DSC) and physical properties (density). The results showed that the addition of 20% of talc can increase the melting temperature with a melting temperature of 162.1°C and the lowest density of 0.908 g/cm3 without the addition of talc.
Perbandingan Karakteristik Biodegradable Foam dari Pati Ubi Jalar dan Pati Kentang dengan Penambahan Serat Selulosa Hana Isabella; Nanik Hendrawati
Jurnal Ilmiah Teknik Kimia Vol 6, No 2 (2022): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v6i2.21940

Abstract

Biodegradable foam is an alternative to styrofoam which is made from starch raw materials that can be degraded by nature. However, the starch-based biodegradable foam has weaknesses in water absorption and tends to be fragile so special applications are needed to able to increase strength, elasticity, and resistance to water. Therefore, the filler is added in the form of cellulose fibers derived from banana stems which have a large cellulose content and little lignin, to increase cellulose content, the cellulose isolation stage is carried out. This study aims to determine the effect of adding cellulose fibers to biodegradable foam made of two different types of starch on the characteristics of biodegradable foam. The manufacture of biodegradable foam is carried out by the baking process method and uses two different types of starch as the main ingredients, namely sweet potato starch and potato starch. The added cellulose fibers varied from 1%, 3%, 5%, 7%, and 9% w/w by weight of starch. The results of testing biodegradable foam from two different types of starch show that the absorption capacity using potato starch with variable cellulose is 9% lower than foam with sweet potato raw materials. The biofoam that has the greatest biodegradability value is the sweet potato starch biofoam at a variable of 9% cellulose fiber. Biodegradable foam made from sweet potatoes with a cellulose variable of 9% has the highest tensile strength value of 11,221 MPa.
Karakterisasi Bioplastik Berbahan Kombinasi Pati Jagung dan Tepung Jagung dengan Perekat Poli Vinil Alkohol (PVA) dan Pemlastis Gliserol Sri Sutanti; Mumpuni Asih Pratiwi; Lucia Hermawati; Lucia Hermawati Rahayu; Handika Gilang Ramadhan
Jurnal Ilmiah Teknik Kimia Vol 6, No 2 (2022): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v6i2.20912

Abstract

The much-needed packaging materials are still dominated by synthetic plastics which are difficult to decompose and produce dioxin gas, thus polluting the environment and dangerous for humans. The solution is to use bioplastics. The study aims to determine the characteristics of bioplastics in the ratio (%)  of corn starch to corn flour: 100:0; 80:20; 60:40; 40:60; 20:80; and 0:100. The study used RAL, and descriptive analysis. Starch suspension with a ratio of 1:20 as much as 100g/run was heated at a temperature of 70-80oC for 30 minutes while stirring added with 10% PVA solution and 1 mL of glycerol heated and stirred for 10 minutes, degassed for 10 minutes, molded and dried at 50-60oC for 24 hours. The resulted bioplastics were then characterized for their water resistance, film thickness, degradation, tensile strength, elongation at break, and morphology. The results showed that the addition of corn flour increased water resistance, film thickness, degradation time, tensile strength, and elongation at break. The best results in this study were obtained at a ratio of 0:100.

Page 8 of 13 | Total Record : 122

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