cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota medan,
Sumatera utara
INDONESIA
Jurnal Teknik Kimia USU
Published by Universitas Sumatera Utara
ISSN : -     EISSN : -     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering
Arjuna Subject : -
Articles 9 Documents
 1 
Search results for , issue "Vol 2, No 4 (2013)" : 9 Documents clear
PENGARUH WAKTU POLIMERISASI PADA PROSES PEMBUATAN POLIESTER DARI ASAM LEMAK SAWIT DISTILAT (ALSD) Ahmad Rozi Tanjung, Ida Ayuningrum, Renita Manurung
Jurnal Teknik Kimia USU Vol 2, No 4 (2013)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jutek.v2i4.4012

Abstract

Palm Fatty Acid Distillate (PFAD) can be used as raw material for synthesis polyester. The aim of this research is to synthesis of polyester and to determine the effect of reaction time on  polymerization methyl ester PFAD. The esterification stage was done at temperature 70oC, reactiontime 120 minute, reactant ratio 1:8 (PFAD:methanol), concentration of catalyst (H2SO4) 1% (w/w) PFAD;polymerization stage was done at temperature 126-132°C, concentration ofcatalyst (BF3-diethyl etherate) 9.2 % (w/w), variation of polymerization reaction time3, 4, and 5 hours; and polyesterification stage was done at temperature 175-200 oC,reactant ratios (w/w) 1:1 (polymerized ME : ethylene glycol), reaction time 4 hours and all ofstage was stirred at 150 rpm. The results showed, in the esterification stage wasobtained methyl ester with iodine value 77.29 g I2/100 g, viscosity 6.90 cP,density 859.91 kg/m3 and analysis byusing GC-MS showed that the purity of methyl ester was 82.23% andmolecular weight 267.97 g/mol. Decreasing in iodine value from 77.294 I2 g/100 g to 63.45-61.14 gI2/100 g indicated that the polymerization process had takenplace. In polyesterification stage wasobtained gel polyester, viscous, dark brown colored solid at room temperature with acid value from13.13 to 21.65 mg KOH/g, viscosity from 14.3 to 19.1 P, and molecular weight 995.03 to 1,522.07g/mol which is more suitable for application of modified polyester. Analysis by using GC showed that the purity of polyester is equal to 65.49%.
PENGOMPOSAN SEKAM PADI MENGGUNAKAN SLURRY DARI FERMENTASI LIMBAH CAIR PABRIK KELAPA SAWIT Irvan, Bambang Trisakti, Cut Novaliani Hasbi, Elwina Widiarti
Jurnal Teknik Kimia USU Vol 2, No 4 (2013)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jutek.v2i4.4567

Abstract

Rice husk is material waste that is usually just burned. However, this practice is causing air pollution problems. One effort to help overcome the problem of agricultural waste is recycling technique with an emphasis on the process of composting. Many efforts can be made ​​to speed the composting process. The treatment was performed by the addition of slurry at the beginning of  composting process with the addition of as much as 1, 2,and 3 liters and the addition of slurry during composting process by adding 0,5;1; and 1,5liters of slurry every 3 days once. At each treatment was added 1 kg of fine compost. The condition which almost meets quality compost by SNI 19-7030-2004 and most precocious and decomposesis the compost with the addition of as much as 1, 5 liters every 3 days where the temperature is 32,8 oC obtained, the water level is 35,1,99 %, the ratio of C / N is 7.58 and pH is 9,59. This thing indicates that the slurry from biogas fermentor can accelerate the maturity of compost making so that it is more easily broken down or decomposed.
PEMANFAATAN ABU KULIT BUAH KELAPA SEBAGAI KATALIS PADA REAKSI TRANSESTERIFIKASI MINYAK SAWIT MENJADI METIL ESTER Muhammad Yusuf Ritonga, Doni Hermanto Sihombing, Allen Rianto Sihotang
Jurnal Teknik Kimia USU Vol 2, No 4 (2013)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jutek.v2i4.4626

Abstract

Transesterification is the reaction to produce methyl esters in which this reaction’s catalyst involves coconut shell burnt ash at temperature of 550, 600, 650 °C for 8 hours and uses 1%, 2%, 3% (w/w) of ash. Ash used was dissolved in 75 ml of methanol to obtain potassium methoxide compound and was analyzed by AAS (Atomic Absorption Spectrophotometer) to determine potassium content. Palm oil involved in the processing stage of degumming with the addition of 0,6% (w/w) H3PO4 85% to remove gum then followed by an esterification reaction using 3,0% (w/w) H2SO498% as the catalyst to reduce FFA<1%. The temperature of transesterification reaction was at 65 °C for 2 hours, ratio of methanol: CPO 6:1 (n/n) and 500 rpm agitation. Quantitatively, the optimum yield of 81% methyl esters is gained with shell burnt ash at temperature of 600 ° C, 1% (w/w) of ash with the specification of methyl esters as density, kinematic viscosity and flash point are relatively conformed to SNI04-7182-2006 biodiesel and 92.99% purity methyl ester with 4.62% total glycerin,2.39% free glycerin based on GC (Gas Chromatography).
PERANCANGAN PROTOTIPE BIOREAKTOR UNTUK PENGOLAHAN LANJUT LIMBAH CAIR PABRIK KELAPA SAWIT (LCPKS) SECARA AEROBIK Bambang Trisakti, Jhon Almer S. Pasaribu, Tri Afrianty, T. Husaini, Irvan
Jurnal Teknik Kimia USU Vol 2, No 4 (2013)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (556.046 KB) | DOI: 10.32734/jutek.v2i4.5252

Abstract

LCPKS further processing is usually done by using activated sludge system is implemented in an open pond.This system requires a large enough dissolved oxygen so that if the system would lead to poor aeration then the HRT will be great. In addition to the spread of foul smell due to the system being used is open. This study aims to produce a prototype bioreactor that can be used to replace the above processing system. Bioreactor tank made ​​of transparent plastic tube that comes by baffles and stirrer are made ​​of stainless steel. In addition, the bioreactor is also equipped with a motor stirrer, aeration systems, and deodorizing unit. The resulting prototype has 11.078 cm high and 21.4 cm diameter, 9.2-liter operating volume, and fluid and baffle height is 24.5 cm. Bioreactor equipped with two stirrer blade that is horizontal turbine disc type at  7.13 cm of the tank bottom and paddle 4-rowing at 12.84 cm above the first blade. Bioreactor prototype has passed the leakage testand if the air flowing in at a constant velocity 0.5 m/s then the value of gasholdup (ε) is 0.02. Used this prototype for further processing LCPKS cause COD value of waste fell from 4,482 mg/l to 3,096 mg/l for 30 days long processed.
PENGARUH PENAMBAHAN ALKANOLAMIDA TERHADAP SIFAT-SIFAT UJI TARIK VULKANISAT KARET ALAM BERPENGISI KAOLIN Yudha Widyanata, Indah M.S. Sitorus, Indra Surya
Jurnal Teknik Kimia USU Vol 2, No 4 (2013)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (415.16 KB) | DOI: 10.32734/jutek.v2i4.5276

Abstract

By using a semi-efficient vulcanization system, Alkanolamide (ALK) was incorporated into kaolin-filled natural rubber compound at 1.0; 3.0; 5.0 and 7.0 parts per hundred rubber (phr). An investigation was carried out to examine the effect of ALK on tensile properties of the kaolin filled-natural rubber compound. It was found that ALK exhibited higher tensile modulus, tensile strength, and elongation at break up to 5.0 phr of ALK loading and then decreased with further increasing of ALK loading. Crosslink density measurement proved that 5.0 phr loading of ALK in the kaolin-filled natural rubber system exhibited greatest tensile properties due to its highest crosslink density formation.
PENGARUH UKURAN SERBUK TEMPURUNG KELAPA SEBAGAI PENGISI KOMPOSIT POLIESTER TAK JENUH TERHADAP SIFAT MEKANIK DAN PENYERAPAN AIR Falma Irawati Sijabat, Jenmorisdo Saragih, Halimatuddahliana
Jurnal Teknik Kimia USU Vol 2, No 4 (2013)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jutek.v2i4.5446

Abstract

Coconut Shell Powder (CSP) was derived from industrial Making Anti-Mosquito can potentially be used as filler in materials composite. The investigation on the utilization of CSP as filler in a polyester matrix has been done with the purpose to obtain the best CSP fillers size in Unsaturated Polyester (UPR) composites in producing the best mechanical properties such as tensile strength, impact strength  and water absorption. In this study, UPR was mixed with CSP at the sizes 50 mesh, 70 mesh and 100 mesh with comparison of CSP: Unsaturated Polyester 20:80 (w/w) by using hand lay-up method. The result of mechanical properties showed that, at a ratio of CSP: PE (20:80), the maximum tensile strength obtained is 42.558 MPa with the size of CSP 70 mesh. The test on impact strength was found that the increasing only occured with the size of CSP 100 mesh at 6083.47 J/m2. For absorption test, the highest water absorption occured at the first day,  water absorption increased with increasing the amount of filler and the most CSP  absorbed  water at 70 mesh.  
KARAKTERISTIK EDIBLE FILM DARI EKSTRAK KACANG KEDELAI DENGAN PENAMBAHAN TEPUNG TAPIOKA DAN GLISEROL SEBAGAI BAHAN PENGEMAS MAKANAN Loisa Lorensia Sinaga, Melisa Seri Rejekina S, Mersi Suriani Sinaga
Jurnal Teknik Kimia USU Vol 2, No 4 (2013)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jutek.v2i4.5454

Abstract

One way to solve the environment issue in the usage of nonbiodegradable plastic is by using biodegradable packaging. Edible film is a thin layer which is overlay the food. In this research, edible film made from mixture of soybean extract with starch and glycerol. The process of making edible films is began with producing soybean protein extract producing soy milk. Soy milk added by tapioca flour and glyserol variations : 2; 4; 6; 8 and 10 (ml/100 ml soy milk). Then, the mixture stirred by using magnetic stirer, formed and dried in the oven at the temperature of 40 °C ± 2 days. After that, the characteristics test of edible film done by checking the thickness, the tensile strength and elongation at break. The results of research shows that the addition of glycerol influence the edible film’s thickness, tensile strength and elongation at break. The thickness obtained from the increasing of the addition glycerol. They are 0,208 mm; 0,228 mm; 0,248 mm; 0,274 mm and 0,294 mm. The tensile strength will decrease if the thickness of the edible film increase. They are 0,105 MPa; 0,134 MPa; 0,088 MPa; 0,072 MPa and 0,048 MPa. The elongation at break which is obtained will increase by increasing of edible film’s thickness. They are 1,839%; 3,270%; 3,842%; 5,779%, and 6,158%. The characteristic’s test shows that the best thickness of edible film is 0,228 mm.  
PENGARUH PENAMBAHAN ALKANOLAMIDA TERHADAP KARAKTERISTIK PEMATANGAN DAN KEKERASAN VULKANISAT KARET ALAM BERPENGISI KAOLIN Indah M.S. Sitorus, Yudha Widyanata, Indra Surya
Jurnal Teknik Kimia USU Vol 2, No 4 (2013)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jutek.v2i4.5532

Abstract

By using a semi-efficient sulphur accelerated vulcanization system, an investigation of the effect of  alkanolamide on cure characteristics and hardness  properties of kaolin-filled natural rubber compounds was carried out. Alkanolamide was synthesized  from Refined Bleached Deodorized Palm Stearin (RBDPS) and diethanolamine. Alkanolamide was incorporated into the kaolin filled-natural rubber compound at 1.0; 3.0; 5.0 and 7.0 Parts per-Hundred RubbeR (phr). It was found that alkanolamide gave shorter scorch time and cure time. Alkanolamide also exhibited higher torque different,  crosslink density, and hardnessup to 5.0 phr and then decreased with further increasing the loading of alkanolamide.  
PENGARUH MASSA RAGI DAN WAKTU FERMENTASI TERHADAP BIOETANOL DARI BIJI DURIAN Farida Hanum, Nurhasmawaty Pohan, Mulia Rambe, Ratih Primadony, Mei Ulyana
Jurnal Teknik Kimia USU Vol 2, No 4 (2013)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (322.799 KB) | DOI: 10.32734/jutek.v2i4.5620

Abstract

Bioethanol  is the ethanol made from plants that contains starch, sugar, and the others cellulose plants. This study uses durian seeds that contain carbohydrate and sugar as basic material and the purpose is to make bioethanol  from durian seeds with the variation of yeast mass added and fermentation time. The variables used were the changes of yeast mass 3%; 6%; and 9%, fermentation pH was 4,5, and fermentation times were 0; 24; 48; 72; and 96 hours. The results of experiment were the bioethanol concentration was 18.9988% at the yeast mass 6% with 48 hour for the fermentation.

Page 1 of 1 | Total Record : 9

 1 

Filter by Year

2013 2013


Reset
Filter By Issues
All Issue Vol. 14 No. 2 (2025): Jurnal Teknik Kimia USU Vol. 14 No. 1 (2025): Jurnal Teknik Kimia USU Vol. 13 No. 2 (2024): Jurnal Teknik Kimia USU Vol. 13 No. 1 (2024): Jurnal Teknik Kimia USU Vol. 12 No. 2 (2023): Jurnal Teknik Kimia USU Vol. 12 No. 1 (2023): Jurnal Teknik Kimia USU Vol. 11 No. 2 (2022): Jurnal Teknik Kimia USU Vol. 11 No. 1 (2022): Jurnal Teknik Kimia USU Vol. 10 No. 2 (2021): Jurnal Teknik Kimia USU Vol. 10 No. 1 (2021): Jurnal Teknik Kimia USU Vol. 9 No. 2 (2020): Jurnal Teknik Kimia USU Vol. 9 No. 1 (2020): Jurnal Teknik Kimia USU Vol. 8 No. 2 (2019): Jurnal Teknik Kimia USU Vol 8, No 1 (2019) Vol 7, No 2 (2018) Vol 7, No 1 (2018) Vol 6, No 4 (2017) Vol 6, No 3 (2017) Vol 6, No 2 (2017) Vol 6, No 1 (2017) Vol 5, No 4 (2016) Vol 5, No 3 (2016) Vol 5, No 2 (2016) Vol 5, No 1 (2016) Vol 4, No 4 (2015) Vol 4, No 3 (2015) Vol 4, No 2 (2015) Vol 4, No 1 (2015) Vol 3, No 4 (2014) Vol 3, No 3 (2014) Vol 3, No 2 (2014) Vol 3, No 1 (2014) Vol 2, No 4 (2013) Vol 2, No 3 (2013) Vol 2, No 2 (2013) Vol 2, No 1 (2013) Vol 1, No 2 (2012) Vol 1, No 1 (2012) More Issue