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All Journal Jurnal Teknik Kimia USU
M. Yusuf Ritonga
Departemen Teknik Kimia, Fakultas Teknik Universitas Sumatera Utara
Chemical Engineering, Chemistry & Bioengineering Chemistry Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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PENGARUH KADAR AIR, DOSIS DAN LAMA PENGENDAPAN KOAGULAN SERBUK BIJI KELOR SEBAGAI ALTERNATIF PENGOLAHAN LIMBAH CAIR INDUSTRI TAHU Ayu Ridaniati Bangun; Siti Aminah; Rudi Anas Hutahaean; M. Yusuf Ritonga
Jurnal Teknik Kimia USU Vol. 2 No. 1 (2013): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (265.391 KB) | DOI: 10.32734/jtk.v2i1.1420

Abstract

Liquid waste industrial of wheys contain very high organic materials. Organic compounds in the effluent are proteins, carbohydrates, fats and oils. Based on the results of field studies on Industry Hall of liquid waste industrial characteristics of whey in Medan, it is known that liquid waste industrial of wheys contain average BOD (4583 mg/l), COD (7050 mg/l), TSS (4743 mg/l ) and oil or fat (26 mg/l ) at pH 6.1. Therefore, the whey waste water must be treated before it is discharged into the environment to reduce the contaminants that accompany the waste. One alternative that can be used as a coagulant is moringa seed powder. This study used of moringa seed powder with a water content of 7 %. Variations of coagulant dosage which are used 2000, 3000, 4000, 5000 mg/200 ml liquid waste industrial of whey, coagulant particle size 50 and 70 mesh with the initial pH about 4. The optimum deposition time is obtained 60 minutes with 77.43 % reduction in turbidity, TSS 90.32 %, and 63.26 % COD in 5000 mg/200 ml dosage of coagulant and coagulant particle size of 70 mesh with the final pH about 4, it can be concluded that moringa seeds can be used as an effective coagulant because the reductions were obtained over 50 %.
PENGURANGAN FFA DAN WARNA DARI MINYAK JELANTAH DENGAN ADSORBEN SERABUT KELAPA DAN JERAMI Julius Fernando Pakpahan; Tomas Tambunan; Agnes Harimby; M. Yusuf Ritonga
Jurnal Teknik Kimia USU Vol. 2 No. 1 (2013): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (264.241 KB) | DOI: 10.32734/jtk.v2i1.1424

Abstract

Jelantah is a cooking oil that has been used in a few time. It is not only have an unattractive colour and rancid, but also can make a risk to the health. Jelantah can be recovered by adsorbing the impurities and reduce color using the adsorbents. This study aimed to reduce levels of FFA and color of jelantah using coconut fiber and straw adsorbents with variation 50,70 and 100 mesh, variations in pressure at 1 atm and below, and the time variation of adsorption every 10 minutes during the first half hours. In this study, the best adsorbent to reduce free fatty acid (FFA) is coconut fiber with a pressure below 1 atm where FFA value before adsorbed is 0.006823 N and after being adsorbed 0.0002924 N, whereas for the reduction of oil color, the best adsorbent is straw with 100 mesh size because it reduces the color of 5.5 red and 24 yellow to 3.3 red and 21 yellow.
PENGARUH PELARUT TERT-BUTANOL TERHADAP MINYAK DAN SUHU REAKSI GLISEROLISIS PADA PEMBUATAN MONO DAN DIASILGLISEROL (MDAG) MENGGUNAKAN KATALIS ABU CANGKANG TELUR AYAM Retno Dian Lestari Purba; Margareth Nainggolan; M. Yusuf Ritonga
Jurnal Teknik Kimia USU Vol. 3 No. 4 (2014): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (380.004 KB) | DOI: 10.32734/jtk.v3i4.1655

Abstract

Mono and diacylglycerol (MDAG) is one of the synthetic emulsifier agent widely used in food industry. Emulsifier agent is one of the economically high value oleochemical product. The purpose of this research is to produce MDAG through glycerolysis process of refined bleached deodorize palm oil (RBDPO) and glycerol by using egg shell waste as catalyst (4 % of oil weight) for 2 hours, whereas the variables ratio of tert-butanol to oil (1, 2, 3 v/w) and reaction temperatur (60, 70 and 80 oC). Egg shell waste was calcined at 900 oC for 2 hours to form active CaO catalyst. Then glycerolysis process to produce mono and diacylglyserol. Mono and diacylglycerol that formed was separated by using separator fannel. The upper layer was vaporated to separate MDAG from tert-butanol. The content of MDAG was analyzed using Gas Chromatography. The best result was at 70 oC temperature, ratio co-solvent to oil 3:1 (v/w), 2 hours of reaction time and 4% of catalyst amount from oil and oil molar ratio to glycerol 1:6 with MDAG content of 68,62%. MDAG formed are w/o emulsifier with 5.19 HLB. The result of this research shows that egg shell waste is suitable to be used as source of cheap catalyst to produce mono and diacylglycerol.
Co-Authors Agnes Harimby Ayu Ridaniati Bangun Julius Fernando Pakpahan Margareth Nainggolan Retno Dian Lestari Purba Rudi Anas Hutahaean Siti Aminah Tomas Tambunan