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CHEMICA Jurnal Teknik Kimia
Published by Universitas Ahmad Dahlan
ISSN : 2355875X     EISSN : 23558776     DOI : 10.26555
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Energy
CHEMICA Jurnal Teknik Kimia ISSN, 2355-875X (print) 2355-8776 (online) is a journal that publishes manuscripts or scientific papers in Chemical Engineering. The scope of this journal covers chemical reaction techniques, separation, optimization, process control, process system engineering, waste treatment, food and material technology. Journals are published in print and online twice a year, in June and December by Chemical Engineering Program, Faculty of Industrial Technology, Universitas Ahmad Dahlan Yogyakarta.
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Articles 8 Documents
 1 
Search results for , issue "Vol 6, No 2 (2019): Desember 2019" : 8 Documents clear
Performance of Tween 80 as Surfactant for Chitosan Drug Delivery Film Nadya Alfa Imani; Maharani Kusumaningrum
CHEMICA: Jurnal Teknik Kimia Vol 6, No 2 (2019): Desember 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v6i2.14792

Abstract

Optimization of the drug delivery system is based on the need for more efficient and effective drugs to fight disease. The addition of surfactant as an additive in the drug delivery precursor solution can affect the performance of the material, especially on the ability of drug release. In this study, Tween 80 was used as a surfactant to be mixed in a low molecular weight chitosan solution. Several variations of the Tween 80: chitosan ratios, as well as variations in acidity conditions, are used to determine the optimum conditions for drug release. Drug release profile fittings were tested on three kinetic models that were frequently used namely zero order model, Higuchi’s model, and Korsmeyer-Peppa’s model. The results showed that the optimum conditions for release were obtained with the use of a ratio of 7:10 with a release profile resembling Korsmeyer-Peppa’s model.
Pengaruh Waktu Kontak Karbon Aktif dari Kulit Durian terhadap Kadar COD, BOD, dan TSS pada Limbah Cair Industri Tahu Lydiana Eka Nabilla; Rusmini Rusmini
CHEMICA: Jurnal Teknik Kimia Vol 6, No 2 (2019): Desember 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v6i2.14698

Abstract

The disposal of tofu industrial wastewater into the environment without treatment can cause pollution. The purpose of this study was to utilize durian peel as activated carbon which is used to treat the tofu industrial wastewater through adsorption process. In addition, to determine the effect of variation in contact time on the adsorption process. Carbon from durian peel with chemical activation using KOH 25% containing 10.15% water, 6.14% ash, and iod adsorption of 1194.83 mg/g. Activated carbon from durian peel was tested by FTIR obtained by functional groups of –OH, C−H, and C=C aromatic. Porosity analysis of activated carbon using SAA with BET method obtained surface area of 471.6 m2/g, pore volume of 0.5698 cc/g, and average pore diameter of 24 Å classified as mesoporous. Adsorption process between activated carbon and tofu industrial wastewater variations in contact time during 30, 60, 90, and 120 minutes. Based on the study, the optimum contact time was 90 minutes. At that time, activated carbon from durian peel can reduce COD levels to 57%, BOD to 59%, and TSS to 72% from the initial levels of tofu industrial wastewater.
Potensi Produk Cair (Oil Phase dan Water Phase) Pirolisis Mikroalga Sebagai Pengawet Makanan Siti Jamilatun; Martomo Setyawan; Ilham Mufandi; Arief Budiman
CHEMICA: Jurnal Teknik Kimia Vol 6, No 2 (2019): Desember 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v6i2.14813

Abstract

Microalgae is one of the oldest living organisms namely Thallophyta (plant lacking roots, stems, and leaves) that have chlorophyll as a pigment to mainly photosynthesis process. Microalgae as the water plant had some characteristics such as high carbohydrate, protein, and lipid content in which can be produced energy (liquid, solid, and gas) by using the pyrolysis process. The raw material in this experiment was used Spirulina platensis as the type of microalgae. The residue of Spirulina platensis was content acid, phenol, dan carbonyl in which this product liquid is potential as a food preservative. The experiment was performed by using the pyrolysis process which is equipped with a cooler (condenser) to condense the combustion vapor. Thermal decomposition was conducted in the pyrolysis reactor with a temperature of 300 ℃, 400 ℃, 500 ℃, and 600 ℃ under atmospheric condition. The result indicated that the pyrolysis proses had oil phase as the top result and water phase as the bottom result. The result from GC/MS analysis reported that the pyrolysis process on temperature of 300 ℃ can produce the oil phase with the phenol content of 6.7 wt.%, acid of 33.03 wt.%, carbonyl of 4.95 wt.%, and Poly Aromatic Hydrocarbon (PAH) of 6.23 wt.%, respectively. Otherwise, the pyrolysis process can produce the water phase (liquid smoke) on temperature 400 °C, 500 °C, dan 600 °C with the phenol content of 0.22 wt.%, acid content of 0.69-9.12 wt.%, carbonyl content of 10.46-13.02 wt.% and PAH of 26.93-45.18 wt.%. The superiority of preservatives from residual Spirulina platensis has a high nitrogenate content from protein decomposition (10.13-31.22 wt.%). High protein content in food preservatives can be used as an additive compound to increase protein intake.
Ekstraksi Tanin dari Limbah Daun Teh pada Berbagai Suhu dan Waktu Itang Purnama; Jajang Gumilar; Kusmayadi Suradi
CHEMICA: Jurnal Teknik Kimia Vol 6, No 2 (2019): Desember 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v6i2.14724

Abstract

Green tea leaves old (camellia sinensis) is one of the agricultural waste products that has not been widely used and contains enough high tannin. This study aims to find the tannin content with qualitative and quantitative testing. The design used is a randomized block design with an extraction time of 30 minutes, 40 minutes, and a temperature of 60 °C, 70 °C, and 80 °C treatment repeated 4 times. The results showed that the highest tannin content obtained at the extraction time of 40 minutes at a temperature of 80 °C with a tannin content of 11.55%. The treatment that gave the best results obtained in 40-minute long treatment with a temperature of 70 °C with a tannin content of 10.90%, solubility 29.48% and a pH of 5.80.
Recent Catalyst Technology Development in Residue Catalytic Cracking Unit: A Mini Review Suhendra Suhendra; Zen Adi Laksana; Dhenok Widiastuti; Tita Griya Melyta
CHEMICA: Jurnal Teknik Kimia Vol 6, No 2 (2019): Desember 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v6i2.14810

Abstract

The use of fuel oil from year to year until now has experienced a rapid increase, due to increasing population growth in vehicle operations and the development of industries that require fuel. The position of renewable energy has not been able to shift the position of petroleum fuels to the needs of the world market. The RCC unit is secondary processing that converts heavy fraction hydrocarbons to light fraction hydrocarbons with the help of using catalysts into high-value petroleum products such as Naphtha, LPG, and Light Cycle Oil. RCC unit has three main parts of the process, namely riser, stripper, and regenerator, with the use of the main raw material of residue and using a catalyst. This paper aims at reviewing recent journals concerning the catalyst applied in the RCC unit. The basis of the RCC unit to be reviewed is from an existing RCC unit in Indonesia. The development of research on catalysts and regeneration technology in the RCC unit has experienced rapid development until now. It is expected that this paper can contribute to the future development and application of catalysts for the RCC unit, both for national and international levels.
Engineering and Economic Evaluation Perspective in the Production of NiO Nanoparticles Friska Apriliana; Asep Bayu Dani Nandiyanto
CHEMICA: Jurnal Teknik Kimia Vol 6, No 2 (2019): Desember 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v6i2.14567

Abstract

Nickel oxide (NiO) nanoparticles have been proven and can be used in a variety of important applications. The purpose of this research was to evaluate the production process of NiO nanoparticles using the industrial co-precipitation method in terms of engineering and economic evaluation. Specifically, research was conducted by varying raw materials, product selling prices (GPM), equipment prices, and number of employees, which are compared with several economic parameters such as total investment cost (TIC), gross profit margin (GPM), break even point (BEP), payback period (PBP), net present value (NPV), and cumulative net present value (CNPV). The results showed that the PBP analysis showed that the investment would be profitable after more than 4 years with minimum product sales (GPM) of at least 90% and an increase in the price of raw materials no more than 15% of the ideal price. From this economic evaluation analysis, we can conclude that this project is feasible to run.
Optimalisasi Penggunaan Gipsum dan Batu Kapur pada Pembuatan Semen Putih Ahmad Riyanto; Devi Yuliani; Laeli Rizki Amalia; Erna Astuti
CHEMICA: Jurnal Teknik Kimia Vol 6, No 2 (2019): Desember 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v6i2.14629

Abstract

White Portland cement is a fine, gray or white powder, which consists of a mixture of hydraulic cement materials consisting mainly of calcium silicate, aluminate, and aluminoferrite. The manufacture of white portland cement requires special raw material requirements and manufacturing processes, such as raw materials containing very low iron oxides and manganese oxides. Various tests were carried out to obtain white cement of good quality and meet Indonesian National Standards or Standar Nasional Indonesia (SNI). The tests included raw material testing (Lost on Ignition test, LOI) on various compositions and LOI test, % SO3 test, and color test on white Portland cement. The results showed that the greater the % SO3, the strength of white Portland cement will decrease and the greater the LOI, the white Portland cement will be easily damaged. So from the results of the study obtained a good raw material composition for white Portland cement is 89% white slag, 4% limestone, and 7% gypsum. All test results meet Indonesian National Standards or SNI.
Pemisahan Hidrokarbon dalam Limbah Katalis Asam (Spent Acid) Proses Alkilasi Olefin dan Isoparafin dengan Proses Presipitasi Elda Melwita; Syukron Habibie; Abdul Apandi
CHEMICA: Jurnal Teknik Kimia Vol 6, No 2 (2019): Desember 2019
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/chemica.v6i2.14550

Abstract

Alkylation of olefin and isoparaffin produces spent acid waste containing high concentration of hydrocarbon. The content of sulphuric acid and hydrocarbon in spent acid put this waste into hazardous waste classification, therefore must be treated to avoid environmental pollution. Hydrocarbon separation can be carried out using precipitation. Two precipitation methods were applied to precipitate hydrocarbon, namely neutralization, and antisolvent precipitation. Neutralization was conducted using NaOH, CaCO3, and CaO. Meanwhile, antisolvent precipitation was performed using water. Precipitation of hydrocarbon using CaCO3 and CaO showed very satisfying results. On the other hand, NaOH was failed to precipitate hydrocarbon. Hydrocarbon was also precipitated using water as antisolvent at ratio of spent acid:water (g/ml) of 200.

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