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Permanasari, Ayu Ratna
Jurusan Teknik Kimia Politeknik Negeri Bandung
Aerospace Engineering Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Other

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Journal : fluida

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Pembuatan gula Cair dari Pati Singkong dengan menggunakan Hidrolisis Enzimatis Ayu Ratna Permanasari; Fitria Yulistiani
Fluida Vol 11 No 2 (2015): FLUIDA
Publisher : Jurusan Teknik Kimia, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v11i2.81

Abstract

Pada penelitian ini dibuat gula cair dari tepung tapioka yang dihidrolisis dengan enzim. Hidrolisis enzimatis pati terdiri dari dua tahapan yaitu liquifikasi dan sakarifikasi. Pada proses liquifikasi digunakan enzim á-amilase untuk memecah pati yang mengandung amilosa dan amilopektin menjadi dekstrin. Selanjutnya pada tahapan kedua proses sakarifikasi, dimana dekstrin dihidolisa menjadi glukosa dengan bantuan enzim glukoamilase. Volume enzim cair yang ditambahkan adalah 0,3; 0,4; dan 0,5 ml sedangkan konsentrasi substrat divariasikan 25%; 33,3%; dan 40%. Hasil terbaik diperoleh pada konsentrasi substrat 33,3% dan volume enzim sebesar 0,3 ml, yaitu memiliki kecepatan hidrolisis yang paling cepat untuk proses liquifikasi dan sakarifikasi.
Pengaruh Konsentrasi Pemlastis Pada Aplikasi Edible Coating Dari Tepung Pektin Apel Pada Buah Tomat Naura Alfairuzy Quluby; Revani Triananda; Ayu Ratna Permanasari; Irwan Hidayatulloh; Fitria Yulistiani
Fluida Vol 15 No 2 (2022): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v15i2.4390

Abstract

The edible coating is a protective layer that can regulate the rate of respiration. The purpose of the study is to see the effect of adding a plasticizer to the edible coating application of apple pectin flour on tomatoes. Edible coating was made with 2% apple pectin flour and plasticizers glycerol and sorbitol in concentrations of 0.5 percent, 0.6 percent, 0.7 percent, 0.8 percent, 0.9 percent, and 1 percent (v/v). Plasticizer concentrations of 1 percent glycerol and 0.7 percent sorbitol were found to be optimal. The addition of 1% glycerol resulted in 3.673 percent tomato fruit weight loss with a shelf life of more than 20 days, and the addition of 0.7 percent sorbitol resulted in 5.718 percent tomato fruit weight loss with a shelf life of more than 7 days. The percentage of elongation (2.47 percent and 1.125 percent), tensile strength (17.10 and 6.61 Mpa), water vapor transmission rate (5.955 and 7.070 g/m2/day), and thickness (0.06 mm) of edible coating with 1 percent glycerol and 0.7 percent sorbitol were obtained. The thickness, tensile strength, and water vapor transmission rate all met Japanese Industrial Standards, according to these results.
Pyrolysis of Medical Mask Waste into Liquid Fuel Using Activated Natural Zeolite Catalyst Fitria Yulistiani; Agati, Risdo Satriya; Haidar, Aria Henry; Ayu Ratna Permanasari
Fluida Vol. 17 No. 2 (2024): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v17i2.4789

Abstract

Due to the COVID-19 pandemic, there has been a rise in the amount of mask waste, which can be recycled using catalytic pyrolysis. The method targets polypropylene, the primary material used in mask production, and utilizes activated natural zeolite as a catalyst. This process can enhance the selectivity of oil product compounds such as benzene, toluene, ethyl benzene, and xylene. This research aims to investigate the impact of the Catalyst Feed mass ratio (C/F) and time on the distribution and recovery of oil products and to identify the optimal operating conditions for generating oil products comparable to the gasoline fraction. The steps are preparation, activation of zeolite catalysts, pyrolysis, component distribution analysis, and pyrolytic oil physical properties test. The variations in this study are C/F of 0.05, 0.1, and 0.2; and pyrolysis times of 30 and 60 minutes. Increasing the C/F to 0.2 reduced the oil yield to 41.18 %w/w, while increasing the time to 60 minutes reduced the char yield to around 3 %w/w. Pyrolysis at C/F = 0.05 for 30 minutes produced the highest monoaromatic composition of 22.884 %w/w, while pyrolysis at C/F = 0.2 produced the highest monoaromatic contents of 20.274 %w/w. The best operating conditions, namely 60 minutes of pyrolysis with C/F = 0.05, resulted in an oil yield of 47.31 %w/w and an octane number of oil products of 80.645. These conditions produce oil with properties of kerosene fraction with a density of 0.778 g/mL and viscosity of 1.005 cSt.
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 Dewi Kurnia 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