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INDONESIA
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Industrial & Manufacturing Engineering
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI adalah jurnal yang diterbitkan oleh Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro untuk mempublikasikan karya ilmiah - karya ilmiah mahasiswa Program S1 Teknik Kimia Undip.
Arjuna Subject : -
Articles 33 Documents
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Search results for , issue "Volume 2, Nomor 4, Tahun 2013" : 33 Documents clear
KONVERSI KULIT PISANG MENJADI GLUKOSAMENGGUNAKAN KATALIS ARANG AKTIF TERSULFONASI Riskatama Atmaji; Zulfikar Muriadiputra; Didi Dwi Anggoro
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 2, Nomor 4, Tahun 2013
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro,

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Abstract

This research engages banana peel as the source of cellulose for hydrolysis into glucose using sulfonated activated carbon as catalyst. The aims of this research are to study the effect of hydrolysis temperature, hydrolysis times, and the weight of catalyst, to conclude the mathematical model plotted from the yield and the variables, and to conclude The optimum conditions for hydrolysis of banana peel cellulose into glucose which includes hydrolysis temperature, hydrolysis times, and the weight of catalyst.                This  research is designed into two steps, the sulfonation of the activated carbon and the hydrolysis of banana peel cellulose. H2SO4 10 N is used for the sulfonation which is done in 6 hours at 40oC. After the catalysts are dried and calcinated, the catalysts are ready for the hydrolysis precesses which are done in the autoclave batch reactor. After that, spectrophotometer is used to analyze the sample. The results was plotted on a mathematical model and then optimized using the software Statistica 6.0 by Response Surface Methodology method (RSM).                 The result obtained by a mathematical model for relationship activator combination temperature, time and weight of catalyst for content glucose Y = 3,035+0,18 x1 + 0,04 x1² + 0,089 x2 + 0,012 x2² +0,047x3 – 0,021 x3² – 0,014 x1x2 – 0,087 x1x3 + 0,022 x2x3. The optimum conditions of hydrolysis variable for glucose obtained by statistica 6.0 software which the graph fitted response surface and contour plot indicates the optimum hydrolysis temperature is in the range 112°C to 115°C, the optimum hydrolysis time is in the range 300 minutes to 500 minutes, and the optimum weight of catalyst is about 30 gr which the sample contains 3,6 mg/ml of glucose.
KARAKTERISASI TEPUNG KONJAK DARI TANAMAN ILES-ILES (AMORPHOPHALLUS ONCOPHYLLUS) DI DAERAH GUNUNG KREO SEMARANG JAWA TENGAH Hafiz Akbar; Agus Supriyanto; Kristinah Haryani
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 2, Nomor 4, Tahun 2013
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro,

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Abstract

Indonesia has many kinds of plants iles-iles (Amorphophallus oncophyllus). In this study, using raw materials derived from the Goa Kreo, Semarang, Central Java, the area has two types of iles-iles, namely A. oncophyllus and A. variabillis. Plants iles-iles (konjac) contains a fairly high Glukomannan, glukomannan is a polysaccharide composed of units of D-glucose and D-mannose. In this study intended to determine the content of glucomannan plant iles-iles in Goa Kreo. By using gravimetric methods phenyl hydrazine, glucomannan levels were obtained at 30.56%. In this study also aims to determine the viscosity of konjac flour are affected by operating conditions such as the total concentration of konjac flour, stirring time, and pH (pH 2-8). With a higher sucrose concentration, viscosity konjac flour tends to decrease. For salt concentrations (0, 10; 20% w / v) no effect on the viscosity. Improved high viscosity can be observed mixture for konjac - rice flour, konjac - wheat flour and konjac - corn flour. For gel formation, the hydrocolloid which interacts synergistically with konjac flour to form a gel. Hydrocolloids are carrageenan. This gel texture varies according to the ratio of konjac flour - carrageenan.
REKRISTALISASI GARAM RAKYAT DARI DAERAH DEMAK UNTUK MENCAPAI SNI GARAM INDUSTRI Agustina Leokristi Rositawati; Citra Metasari Taslim; Danny Soetrisnanto
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 2, Nomor 4, Tahun 2013
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro,

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Abstract

Salt as we known can be defined as chemicals compound which the main part is Sodium Chloride (NaCl) with impurity substances consist of CaSO4, MgSO4, MgCl2, and others. But to get good quality salt from the raw salt can’t be obtained only by washing raw salt. This is caused by the fact that impurities not just only on the surface of crystals salt but also in the crystal lattice salt, so that needs to be purified by recrystallization. This research will use local raw salt 2nd quality from Demak. In this research will be limited in efforts to increase the quality of salt to fullest the Indonesian National Standard (SNI 06-0303-1989) by recrystallization method. Weight of raw salt used as fixed variable. Non-preparation and preparation (addition of Na2CO3, NaOH, and PAC) and crystallization time (1, 1.5, 2 and 2.5 hours) used as change variables. Impurity content and NaCl concentration was calculated before and after crystallization treatment. Concentration of Ca, Mg and Na ions was determined using AAS. Best recrystallization results of NaCl salt concentration is obtained at crystallization with preparation in 1.5 hours, concentration 393,044.234 ppm (99.969%), which complied to SNI 06-0303-1989 (98.5% db).

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