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All Journal Seminar Nasional Teknik Kimia Kejuangan KOVALEN: Jurnal Riset Kimia CHEESA: Chemical Engineering Research Articles Jurnal Serambi Engineering FLUIDA Fullerene Journal of Chemistry International Journal of Applied Technology Research Industrial Research Workshop and National Seminar Jurnal Teknik Kimia dan Lingkungan Serambi Engineering
Permanasari, Ayu Ratna
Jurusan Teknik Kimia Politeknik Negeri Bandung
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Journal : International Journal of Applied Technology Research

 1 
The effect of precipitation pH and temperature of Mg/Al Hydrotalcite synthesis on the glucose isomerization Ayu Ratna Permanasari; Rony Pasonang Sihombing; Cecep Yudha Hidayatullah; Solehudin Al-Ayubi; Rijal Muyasar Fahmi; Muhammad Fadly Wiryawan Kautsar,; Wahyu Wibisono
Jurnal Internasional Penelitian Teknologi Terapan Vol 3 No 1 (2022): April 2022
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v3i1.55

Abstract

Mg/Al Hydrotalcite as the catalyst in isomerization of glucose into fructose was made by coprecipitation of Mg(NO3)2.6H2O and Al(NO3)3.9H2O. Operating condition of precipitation including the temperature and pH was determined by Response Surface Method (RSM). The catalyst synthesis was carried out in the mole ratio of Mg/Al 3:1 for 18 h and the catalyst was activated by calcination for 3 h at 500°C. Catalyst characterization was done by FTIR, BET, and XRD. The highest mass product of Hydrotalcite Mg/Al 4.52 g, reached at the precipitation conditions of pH 9 and temperature of 45ºC. The catalytic activity of hydrotalcite Mg/Al was tested by the isomerization of Glucose into Fructose. The highest yield and selectivity were 20.14%, 62.40%, respectively. It was reached in pH 9 and 45ºC. While the highest conversion, 53.47%, was achieved in the pH 11.12 with a precipitation temperature of 45ºC. By the RSM analysis, neither the mass of catalyst product nor the catalytic activity from the isomerization (yield, conversion, and selectivity) were affected significantly by the pH and temperature precipitation.
Isomerization and Evaporation of Red Sorghum Hydrolyzate Sugar into Fructose Syrup through Water and Ethanol-Water as the Media Permanasari, Ayu Ratna; Yulistiani, Yulistiani; Gustaji, F; Karisma, R F; Wibisono, Wahyu
Jurnal Internasional Penelitian Teknologi Terapan Vol 1 No 1 (2020): April 2020
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v1i1.23

Abstract

Red sorghum flour has considerable potential to be used as fructose syrup. The process of making fructose syrup was started with making hydrolyzate sugar by enzymatic hydrolysis of the polysaccharide into glucose syrup, then being isomerized using glucose-isomerase into fructose syrup. The study aimed to determine the best temperature in the isomerization process of hydrolyzate sugar from red sorghum flour through water and ethanol-water as the media and determine the optimum temperature of evaporation process to produce fructose syrup appropriate with SNI and HFS 42 commercials products. Isomerization was carried out on water media and ethanol-water media (2.5: 1) with temperature variations of 27 °C, 40 °C and 60 °C, with a total volume of 100 mL, for 43 hours, and enzyme concentration 1% (b/v) while the evaporation process was carried out at a pressure of 0.8 atm with a temperature variations of 55 °C, 60 °C, 75 °C, and a total volume of 30 ml. The best results of the isomerization process was obtained at 60 °C by water media with the concentration of fructose of 71.60 g/L and the evaporation process at 60 °C obtained an increase in fructose concentration by 70 % from initial fructose concentration and viscosity of 1.60 poise.
The Pyrolysis Reactor Design and The Effect of Liquid Smoke from Coconut Shell on Microbial Contamination of Tofu Permanasari, Ayu Ratna
Jurnal Internasional Penelitian Teknologi Terapan Vol 1 No 2 (2020): October 2020
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v1i2.28

Abstract

Liquid smoke is a natural food preservative which can be made of coconut shells through the pyrolysis process. This study aimed to design a pyrolysis reactor and utilize the coconut shell waste to produce liquid smoke as a natural preservative of tofu. 1.5 kg of chopped coconut shell was pyrolyzed at 400C for 5 hours and produced 488 mL of grade 3 liquid smoke with a yield of 34.23%. The liquid smoke was then purified by extraction using ethyl acetate (1: 1 ratio) solvent and 70C temperature for 2 hours. The extract was then distilled at 80C and produced grade 1 liquid smoke. This liquid smoke had an acid content of 12.26% and a phenol content of 0.73%. This liquid smoke was then applied to tofu for 3 days and analyzed the microbial contamination. The smallest amount of microbial contamination was found in the samples of yellow tofu and white tofu coated with liquid smoke and stored in the refrigerator for 1.4 × 105 CFU / mL and 8 × 103 CFU/ml.
Co-Authors Agati, Risdo Satriya Aprillia Nurul’Aina Ari Marlina Ari Wibowo Aulia Syalwa Iskandar Bevi Lidya C. Yudha Hidayatulloh Cecep Yudha Hidayatullah Dahliana Alami Dianty Rosirda Dwi Nirwantoro Nur Fitria Yulistiai Gustaji, F Haidar, Aria Henry Haq, Muhammad Umair Ul Harita Nurwahyu Chamidy Hasanah, Rizkiya Hidayah, Resti Nurul Hidayatulloh, Irwan In Jumanda Kasdadi Karisma, R F Keryanti, Keryanti Khoirin Najiyyah Sably Linda Maulani Maharani, Devina Mira Aulia Tsagila Muhammad Fadly Wiryawan Kautsar Muhammad Fadly Wiryawan Kautsar, Muhammad Fahmi Hidayatulloh Muhari, Emma Hermawati Nancy Siti Djenar Naura Alfairuzy Quluby Nizar Fathurohman Novita Deni Nurfadiya, Alvanissa Pardeny, Vini Ivania Revani Triananda Rifadil, Mochammad Machmud Rijal Muyasar Fahmi Rijal Muyasar Fahmi Robby Sudarman Salma Liska Saripudin Saripudin Saripudin Saripudin Setyaningrum, Sinta Sihombing, Rony Pasonang Solehuddin Al-Ayubi Solehudin Al-Ayubi Syamfitri, Arum Tri Reksa Saputra Tri Reksa Saputra Wahyu Wibisono WAHYU WIBISONO Widiastuti, Endang Widyanti, Emmanuela Maria Wulan Suci Ramdhayani Yulistiani Yulistiani, Yulistiani Yulistiani, Fitria Yuni Kustiar Yurikke Julieta Permata Putri Sunarya