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INDONESIA
Jurnal Teknik Kimia USU
Published by Universitas Sumatera Utara
ISSN : -     EISSN : -     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering
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Articles 349 Documents
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PENENTUAN KONDISI KESEIMBANGAN UNIT LEACHING PADA PRODUKSI EUGENOL DARI DAUN CENGKEH Tagora Bangkit P.S, Rinaldry Sirait, Iriany
Jurnal Teknik Kimia USU Vol 1, No 1 (2012)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jutek.v1i1.119

Abstract

Leafs of clove is an alternative source to obtain clove oil. Clove oil is classified into essential oil with eugenol as its main component. Clove oil is widely used in pharmaceutical, food and beverage industries. The objective of this research is to obtain clove oil by solid-liquid extraction (leaching). This research was expected to give data of solid-liquid equilibrium for designing solid liquid extractor. This research was carried out by leaching process with ethanol as its solvent. The extract was then purified by distillation to separate solvent from oil. The fixed variables which were used in this research were stirring rate of 460 rpm and 90 grams dry-based clove leaf. Extraction process was carried out by using solvent with temperature of 30oC and 50oC, extraction time of 1-3 hours with 0.5 hour increment and solvent volume of 500 ml and 600 ml. The results showed that the highest yield of clove oil extraction was obtained at temperature of 50oC and solvent volume of 600 ml. Equilibrium was reached after 2.5 hours and 79%  eugenol concentration in the solvent.Keywords : leaching, distillation, clove oil, yield, eugenol
EKSTRAK DAUN SIRIH HIJAU DAN MERAH SEBAGAI ANTIOKSIDAN PADA MINYAK KELAPA Hermiati, Rusli, Naomi Yemima Manalu, Mersi Suriani Sinaga
Jurnal Teknik Kimia USU Vol 2, No 1 (2013)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jutek.v2i1.120

Abstract

Extraction is the separation of a substance from the mixture, with the distribution of a solute between two solvents which can not be mixed to fetch solute from one solvent to another solvent. The purpose of this study was to determine the antioxidant activity found in betel leaf extract for coconut oil numbers peroxide analysis, antioxidant resistance, with Lovibond color test and to found variations in betel leaf types that produce the optimum operating conditions of antioxidants. In this study, green and red betel leaves extracted by using ethanol solvent, the extract is added to coconut oil and then tested peroxide number and color levels. The results obtained in this study were able to lower the number of betel leaves peroxide by 55.13% with the best optimum condition; volume of 150 ml of solvent, extraction time of 75 minutes, and stirring speed of 300 rpm for the raw material powder of red betel leaf.Keywords : extraction, antioxidants, peroxide number, betel, lovibond
PENGOLAHAN LANJUT LIMBAH CAIR KELAPA SAWIT SECARA AEROBIK MENGGUNAKAN EFFECTIVE MICROORGANISM GUNA MENGURANGI NILAI TSS Irvan, Bambang Trisakti, Michael Vincent, Yohannes Tandean
Jurnal Teknik Kimia USU Vol 1, No 2 (2012)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jutek.v1i2.121

Abstract

Palm oil mill effluent (POME) production in Indonesia is estimated around 28.7 million ton/year. Generally, POME treatment is done conventionally by using facultative ponds. Aside from the vast usage of land and operational cost, this system also emits greenhouse gases. Eventhough, POME is a potential raw resource in producing biogas. Previous researches were done with anaerobic process to produce biogas, but the waste produced still haven’t met the standard quality control requirements. The total suspended solid (TSS) contained in the waste produced from the anaerobic process is still around 400 mg/L, which is the reason why aerobic process is still necessary to drop the number of TSS contained by using effective microorganism. From the result, a 10 day HRT aerobic process can reduce the number of TSS to around 200 mg/L. Keywords : biogas, TSS, effective microorganism, POME
PENGARUH PENAMBAHAN ALKANOLAMIDA TURUNAN MINYAK KELAPA SAWIT TERHADAP SIFAT-SIFAT UJI TARIK VULKANISAT KARET ALAM BERPENGISI SILIKA Darwis Syarifuddin Hutapea, Harry Laksana Tampubolon, Indra Surya
Jurnal Teknik Kimia USU Vol 1, No 1 (2012)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jutek.v1i1.129

Abstract

By using semi-efficient sulfur accelerated vulcanization sistem, an investigation about function of the alkanolamide as additive material on silica filled natural  rubber was carried out. Alkanolamide was made by reacted between refined bleaching deodorized palm stearin with diethanolamine. Alkanolamide was added  to the natural rubber compound silica filled, which is resulted vulcanizate natural  rubber filled compound and occurring increasing of tensile strength, modulusand crosslinkdensity  up to 5 phr. If was added  more 5 phr, so  reduction of the tensile strength modulus and crosslink density.Keywords : Alkanolamide,Tensile Strength, Crosslink Density, Natural Rubber Vulcanizate 
EKSTRAKSI PEKTIN DARI KULIT BUAH PISANG KEPOK (Musa paradisiaca) Farida Hanum, Martha Angelina Tarigan, Irza Menka Deviliany Kaban
Jurnal Teknik Kimia USU Vol 1, No 1 (2012)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jutek.v1i1.135

Abstract

Pectin are polymer of D-galacturonic acid connected by β-1,4 glucosidic. Pectin are widely used in pharmaceutical, food and beverage industries. This research was expected to took advantage of banana peels (Musa paradisiaca) by producing pectin. The research used an extraction method by using acid solvent in additional to ethanol to form the sediment of pectin and the last step is drying in order to get dry pectin. The fixed variables which were used in this research were 10 grams banana peels, 10% water content of sample, and chloride acid solvent. Extraction process was carried out by pH 1; 1,5; 2; extraction time of 70, 80, 90, 100 minute, and temperature of 80 oC, 90 oC. The results showed that the highest yield of pectin extraction was obtained at temperature of 80 oC, pH 1,5 during 80 minute with 11,88% water content, 0,98% ash content, and 3,72% the methoxyl content.Keywords : extraction, drying, pectin, yield, methoxyl content
PENGARUH PENAMBAHAN ALKANOLAMIDA TERHADAP KARAKTERISTIK PEMATANGAN DAN KEKERASAN VULKANISAT KARET ALAM BERPENGISI SILIKA Harry Laksana Tampubolon, Darwis Syarifuddin Hutapea, Indra Surya
Jurnal Teknik Kimia USU Vol 1, No 2 (2012)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jutek.v1i2.138

Abstract

By using a semi-efficient sulfur accelerated vulcanization system, a research about the effect of  the alcanolamide on cure characteristics and hardnes propertiess of natural rubber filled silika and alkanolamide been done. Alcanolamide produced from palm oil derivatives reacted with dietanolamine. Alcanolamide aaded  into  rubber  with levels 1.0, 3.0; 5.0; 7.0; 9.0; phr. It was found that  alcanolamide gave shorter  Scorch time and cure time. Alkanolamide also exhibited higher torque different, tensile moduli, tensile strength, and crosslink density up to  5.0 phr and ten decrease with future increaseing addition of alcanolamide.Keywords: alcanolamide, cure time, Scorch time, crosslink density, vulcanizate natural rubber
EKSTRAKSI PEKTIN DARI KULIT BUAH PISANG RAJA (Musa sapientum) Farida Hanum, Irza Menka Deviliany Kaban, Martha Angelina Tarigan
Jurnal Teknik Kimia USU Vol 1, No 2 (2012)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jutek.v1i2.144

Abstract

Pectin is extensively utilized by the food processors especially for conversion of low grade fruits in to good quality products like jam, jelly, marmalade, and candies. Pectin has many applications in food and pharmaceuticals products as gelling agents and stabilizers.  This research aims to utilize banana peel  waste (Musa sapientum) as a source of pectin. The research used a  solvent extraction method using hydrochloric acid (HCl) in additional to  ethanol  to precipitate the pectin and the last step  drying process to obtain dry pectin. The fixed variables which were used in this research were 10 grams of banana peel (Musa sapientum),  10% water content of sample, and hydrochloric acid (HCl) as a solvent. The  extraction process was carried out by pH 1; 1.5, 2; the  time of 70, 80, 90, 100 minutes, and the temperature of 80 oC, 90 oC. The results showed that the highest  yield of the extraction was obtained at  90 oC, pH 1.5  during 80 minutes with  11.93%  water content of 0.79% ash content,  about 600-800mg and 4, 43% methoxyl  content. Keywords : equivalent weight, extraction, methoxyl content, pectin, yield 
KEMAMPUAN ADSORBEN LIMBAH LATEKS KARET ALAM TERHADAP MINYAK PELUMAS DALAM AIR Edward Tandy, Ismail Fahmi Hasibuan, Hamidah Harahap
Jurnal Teknik Kimia USU Vol 1, No 2 (2012)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jutek.v1i2.153

Abstract

Natural rubber latex waste usually throw away to be unused materials and caused environment issue. One of the ways to handle this environment issue by using natural rubber latex waste as oil adsorbent. Natural rubber latex waste also had oleophilic and hydrophobic properties that are suitable to being used as oil adsorbent. In this research, researchers found out adsorption capacity of natural rubber latex waste to oil and oil from water, also the characteristics of it’s adsorption with Langmuir and Freundlich isoterm adsorption model. The adsorption characteristics of lubricant oil from water with natural rubber latex waste more fitted well with Langmuir isotherm equation model and the maximum adsorption ability of lubricant oil from water with natural rubber latex waste also significantly increased with the contact time till reached the equilibrium. The results of this study concluded that natural rubber latex waste had a great adsorption capacity and suitabled for being used as oil adsorbent.Keywords : natural rubber latex waste, oil in water, adsorption,  adsorption equilibrium, oil adsorbent
PENENTUAN EFISIENSI INHIBISI KOROSI BAJA MENGGUNAKAN EKSTRAK KULIT BUAH KAKAO (Theobroma cacao) Sri Hermawan, Yuli Rizky Ananda Nasution, Rosdanelli Hasibuan
Jurnal Teknik Kimia USU Vol 1, No 2 (2012)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jutek.v1i2.166

Abstract

Cocoa peel extract is a natural inhibitor that can be used to inhibit the corrosion reaction rate. This research begins by extracting cocoa pods by maceration followed by evaporation on rotary vacuum evaporator and extracts used as the inhibitor with concentration 600, 800 and 1000 ppm, using steel 1 × 2 cm and  the thickness is 0,1 cm to determine the corrosion rate and corrosive medias are sea water, rainwater and sulfuric acid 1 M . The highest inhibition efficiency generated is 93,06% with concentration of 600 ppm inhibitor in rainwater corrosive media; which means that cocoa peel extract more efficiently used in rainwater corrosive media. Keywords: cocoa, maceration, corrosive media, inhibition efficiency
PENENTUAN EFISIENSI INHIBISI REAKSI KOROSI BAJA MENGGUNAKAN EKSTRAK KULIT BUAH MANGGIS (Garcinia mangostana L) Yuli Rizky Ananda Nasution, Sri Hermawan, Rosdanelli Hasibuan
Jurnal Teknik Kimia USU Vol 1, No 2 (2012)
Publisher : Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jutek.v1i2.171

Abstract

Garcinia mangostana peel extract is a natural inhibitor that can be used to inhibit the corrosion reaction rate. This research begins by extracting Garcinia Mangostana pods by maceration followed by evaporation and extracts used as the inhibitor with concentration 600, 800 and 1000 ppm, with the test sample of corrosion is steel 1 × 2 cm with the thickness is 0,1 cm and corrosive medias are sea water, rain water and sulfuric acid 1 M. The highest inhibition efficiency generated is 99,22% with ethanol solvent at concentration of 800 ppm inhibitor in rain water corrosive media; which means that Garcinia mangostana peel extract more efficiently used in rain water corrosive media. Keywords: garcinia mangostana, corrosive media,reaction rate,  inhibition efficiency

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