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Permanasari, Ayu Ratna
Jurusan Teknik Kimia Politeknik Negeri Bandung
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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.
Pengolahan Air Tanah di Kawasan Politeknik Negeri Bandung menjadi Air Minum dengan Metoda Ultrafiltrasi Emma Hermawati Muhari; Ayu Ratna Permanasari; Fitria Yulistiani
Jurnal Teknik Kimia dan Lingkungan Vol. 2 No. 2 (2018): October 2018
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (936.065 KB) | DOI: 10.33795/jtkl.v2i2.73

Abstract

Di Indonesia, khususnya di sekitar Politeknik Negeri Bandung, sebagian besar sumber air berasal dari air tanah. Air tanah di lingkungan Politeknik Negeri Bandung memiliki pH asam (< 6), coliform > 2.400, dan colitinja positif. Proses pemanasan air kurang efektif untuk mengolah air tanah karena memerlukan waktu yang relatif lama, energi besar, dan tidak dapat meningkatkan pH air agar memenuhi standar air minum sebagaimana tercantum dalam Permenkes Nomor 492/MENKES/PER/IV/2010. Untuk mengolah air tanah di lingkungan Politeknik Negeri Bandung, telah dibuat alat pengolahan air minum portabel dengan menggunakan konsep aliran dead-end filtration. Membran yang dipakai merupakan membran hollow-fiber, berjenis membran ultrafiltrasi berbahan dasar PVDF (Poly Vinylidene Flouride), ukuran pori 0,1μm, panjang membran 15cm, jumlah membran sebanyak 148 buah, dan dapat dioperasikan pada daya isap normal manusia. Permeat yang dihasilkan sesuai dengan standar PERMENKES No. 492/MENKES/PER/IV/2010 dari parameter fisika, kimia, dan biologi. Lifetime membran diamati melalui jumlah permeat yang dihasilkan dari awal pemakaian membran hingga membran tersebut rusak. Lifetime pada alat pengolah air minum portabel ini adalah 38,879 L. Pengolahan air tanah menggunakan alat ini dapat menaikkan pH sebesar 12,78%, menurunkan konduktivitas sebesar 39,31%, dan menurunkan Total Dissolved Solid (TDS) 13,72%. Dari segi ekonomi, penggunaan alat ini dapat menghemat biaya 50% dibandingkan dengan pembelian air minum kemasan 600 ml. In Indonesia, especially around the Bandung State Polytechnic, most of the water sources come from ground water. Ground water in the Bandung State Polytechnic environment has acidic pH (<6), coliform> 2,400, and positive colitis. The process of water heating is less effective for treating ground water because it requires a relatively long time, large energy, and can not increase the pH of the water to meet drinking water standards as stated in Permenkes No. 492 / MENKES / PER / IV / 2010. To treat ground water in the Bandung State Polytechnic, portable drinking water treatment equipment has been made using the concept of dead-end flow filtration. The membrane used is a hollow-fiber membrane, a type of ultrafiltration membrane made from PVDF (Poly Vinylidene Fluoride), pore size of 0.1μm, membrane length of 15cm, membrane number of 148 pieces, and can be operated on normal human suction. The permeate produced is in accordance with PERMENKES No. 492 / MENKES / PER / IV / 2010 from physical, chemical and biological parameters. Lifetime membranes are observed through the amount of permeate produced from the beginning of the use of the membrane until the membrane is damaged. Lifetime of this portable drinking water treatment device is 38,879 L. Ground water treatment using this tool can increase pH by 12.78%, decrease conductivity by 39.31%, and reduce Total Dissolved Solid (TDS) 13.72%. From an economic standpoint, the use of this tool can save 50% costs compared to the purchase of 600 ml of bottled water.
Pengaruh Waktu, Jumlah Yeast, dan Konsentrasi Substrat Pada Fermentasi Limbah Kulit Nanas Menjadi Bioetanol Skala Home Industry Harita Nurwahyu Chamidy; Saripudin Saripudin; Ayu Ratna Permanasari
Jurnal Serambi Engineering Vol 8, No 4 (2023): Oktober 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i4.6784

Abstract

Kulit nanas merupakan limbah yang mengandung glukosa sehingga dapat dimanfaatkan menjadi bioetanol. Kulit nanas selama ini belum banyak dimanfaatkan sehingga tidak memiliki nilai ekonomis.  Penelitian ini bertujuan memanfaatkan limbah kulit nanas untuk menjadi bioetanol dengan cara fermentasi, dimana proses fermentasi akan dilanjutkan dengan distilasi. Fokus penelitian ini berada pada variasi konsentrasi gula substrat karena kenyataannya limbah kulit nanas di lingkungan memiliki konsentrasi gula yang berbeda-beda. Penelitian ini dilakukan dalam skala home industry dengan proses yang dibuat semirip mungkin dengan proses pembuatan bioetanol yang dilakukan pada industri besar. Kapasitas produksi 5 L dengan substrat berupa air perasan kulit nanas. Variasi substrat yang digunakan adalah 3, 4, 5, dan 6 °Bx dengan waktu fermentasi 3 dan 5 hari. Mikroorganisme yang digunakan adalah yeast kering dengan variasi berat 5, 10, dan 15 g. Nutrien berupa pupuk NPK dan Urea dengan kadar 0,5% (b/v). Media fermentasi tidak disterilisasi untuk menyamakan dengan kondisi proses yang ada di industri bioetanol. Hasil fermentasi didistilasi pada suhu 83 °C selama kurang lebih 2 jam. Hasil terbaik diperoleh pada variasi konsentrasi substrat dengan kadar gula 6 °Bx, berat yeast 15 g, yaitu kadar alkohol setelah fermentasi sebesar 9 % dan hasil distilasi diperoleh kadar alkohol 45% sebanyak 170 ml.
Pertumbuhan Akar Anggrek Bulan Melalui Sistem Tanam Hidroponik dalam Smart and Aesthetic Greenhouse Ayu Ratna Permanasari; Harita Nurwahyu Chamidy; Robby Sudarman; Dianty Rosirda; Mochammad Machmud Rifadil; Wahyu Wibisono
Jurnal Serambi Engineering Vol. 9 No. 4 (2024): Oktober 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Hydroponic orchid (Phalaenopsis) growing is a modern agricultural technique that is growing in popularity due to its ability to produce high quality orchid plants with efficient use of resources. Hydroponics is an agricultural method that does not use soil media, but rather nutrient solutions specially formulated to meet the nutritional needs of plants. In orchid cultivation, hydroponics offers several advantages, including more precise nutrient control, a more sterile growing environment, and a reduced risk of soil-borne pests and diseases. The aim of this study was to investigate the effectiveness of the hydroponic method in orchid cultivation, focusing on vegetative growth, flower quality and the efficiency of water and nutrient use. The results of the study showed that orchids grown hydroponically had faster growth and better flower quality compared to conventional methods. The average growth of orchid roots in the aquaponic system was 2mm per week and the growth of orchid roots without hydroponics was approximately 1.3mm per week.
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.
Penentuan pH dan Suhu Optimum Isomerisasi Pembuatan Sirup Fruktosa dari Hidrolisat Onggok Menggunakan Katalis Mg/Al Keryanti, Keryanti; Permanasari, Ayu Ratna; Hidayah, Resti Nurul; Hasanah, Rizkiya
CHEESA: Chemical Engineering Research Articles Vol. 5 No. 1 (2022)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v5i1.10243.1-12

Abstract

Onggok merupakan limbah padat yang dihasilkan dari industri tepung tapioka yang masih mengandung karbohidrat dalam bentuk pati sebesar 70,37%, amilosa 17,22% dan amilopektin 53,15%. Onggok berpotensi untuk diolah menjadi sirup fruktosa melalui proses hidrolisis pati yang dilanjutkan dengan isomerisasi gula hidrolisat. Penelitian ini bertujuan untuk menentukan pH dan suhu optimum isomerisasi pembuatan sirup fruktosa dari hidrolisat onggok melalui eksperimen dan analisis Response Surface Methodology (RSM). Proses hidrolisis untuk memecah pati menjadi glukosa dilakukan secara enzimatis, sedangkan isomerisasi untuk mengubah glukosa menjadi fruktosa dilakukan menggunakan katalis hidrotalsit Mg/Al yang disintesis sendiri. Variasi pH dan suhu isomerisasi ditentukan menggunakan desain eksperimen RSM. Dari percobaan didapatkan bahwa kondisi optimum isomerisasi yaitu pada pH 7 dan suhu 120 oC dengan yield sebesar 36,19% dan selektivitas sebesar 25,88%. Selanjutnya, melalui contour plot dan surface plot dari analisis RSM dapat diprediksi bahwa yield dan selektivitas fruktosa dapat mencapai masing-masing sebesar 17,87% dan 35,07% pada pH 6,58 dan suhu 126,2 °C.
The Comparison of Free Cell and Immobilization Cell Fermentation on Bioethanol Production from Sorghum Stem by SSF and SHF Method Permanasari, Ayu Ratna; Syamfitri, Arum; Maharani, Devina; Setyaningrum, Sinta; Wibisono, Wahyu
Jurnal Teknik Kimia dan Lingkungan Vol. 8 No. 2 (2024): October 2024
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jtkl.v8i2.5755

Abstract

Bioethanol is a new and renewable energy source that can be produced from plants or crops containing sugars, starch, and lignocellulose. Sorghum stem contain a significant amount of sugar and lignocellulose. This study utilized sorghum stem in bioethanol production using Separated Hydrolysis and Fermentation (SHF) and Simultaneous Saccharification and Fermentation (SSF) methods. These two processes are generally used in the prouction of bioethanol with raw materials containing lignocellulose. However, raw materials derived from sweet sorghum stems has not been widely used in the previous studies. This study aimed to determine the effect of fermentation using free cell and cell immobilization techniques on various pH, as well as to identify the most optimal fermentation method (SHF or SSF) for producing the highest ethanol content in sorghum stem fermentation.  The fermentation was conducted at pH levels of 3, 4, and 5. Sorghum stem were processed into powder and followed by delingnification process by 3% of NaOH solution to degrade the lignin content. The hydrolysis process of sorghum stem used cellulase enzymes as the biocatalyst. Fermentation was carried out using Saacharomyce in term of dry yeast for 72 h. The results showed that the increasing within the range pH of 3-5 will increase the ethanol concentration. Freecell technique gave the better result over the immobilized. The best result reached out the ethanol concentration of 13.04 % by the SSF.
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.
Reducing Sugar Production by Cellulose Immobilized Enzyme from the Oil Palm Empty Fruit Brunch (OPEFB) Treated by Organosolv Pretreatment Pardeny, Vini Ivania; Nurfadiya, Alvanissa; Hidayatulloh, Irwan; Haq, Muhammad Umair Ul; Permanasari, Ayu Ratna
Jurnal Teknik Kimia dan Lingkungan Vol. 7 No. 2 (2023): October 2023
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jtkl.v7i2.2437

Abstract

Oil Palm Empty Fruit Bunches (OPEFB) is lignocellulosic that consists of 13.20-25.31% lignin, 42.70-65.00% cellulose, and 17.10-33.50% hemicellulose. Cellulose can be used as a material for a new renewable energy source in the term of reducing sugar through a combination of organosolv pretreatment and hydrolysis process using immobilized enzymes. Organosolv pretreatment was used for lignin degradation, by using ethanol as solvent, which are environmentally friendly and easy to recover, with a concentration S/L 10%(w/w), in 160°C for 90-150 min. The following process is to produce crude enzyme from Aspergillus niger and Trichoderma viride. The resulting crude enzyme cellulase activity of 0.774 U/mL. Then, the crude enzyme is immobilized by Chitosan-GDA. OPEFB hydrolysis process with immobilized cellulase was carried out for 5, 7 and 9 days at 37°C. The best result of lignin degradation reaches out 56.68% lignin removal at 160°C for 150 min, while the hydrolysis of cellulose gives the highest yield, 47.59%, in the 9 days processing time.
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