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All Journal Perfecting a Video Game with Game Metrics Jurnal Kimia Riset Journal of Energy, Mechanical, Material and Manufacturing Engineering FLUIDA Fullerene Journal of Chemistry Industrial Research Workshop and National Seminar Jurnal Teknik Kimia dan Lingkungan

Yulistiani, Fitria

Jurusan Teknik Kimia, Politeknik Negeri Bandung

Author-ID : 889603

Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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In Situ Katalitik Basa pada Proses Pembuatan Biodiesel dari Mikroalga Nannochloropsis sp Shoerya Shoelarta; Ghusrina Prihandini; Mariatha Martha; Rusdiyana Nur Putri Salimi; Fitria Yulistiani
Fluida Vol 15 No 2 (2022): FLUIDA
Publisher : Jurusan Teknik Kimia, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v15i2.4395

Biodiesel merupakan salah satu bahan bakar alternatif yang dapat digunakan sebagai pengganti bahan bakar fosil. Mikroalga Nannochloropsis sp merupakan bahan baku terbarukan yang mampu menghasilkan lipid hingga 68% dan berpotensi untuk dijadikan bahan baku pembuatan biodiesel. Penelitian ini bertujuan untuk mengetahui pengaruh variasi konsentrasi katalis NaOH dan suhu yang digunakan terhadap biodiesel yang dihasilkan dari biomassa Nannochloropsis sp yang digunakan sebagai bahan baku, serta menguji densitas dan viskositas dari crude biodiesel yang dihasilkan. Metode yang digunakan dalam pembuatan biodiesel ini yaitu in situ transesterifikasi menggunakan katalis NaOH 1% dan 2%, pada temperatur 50 dan 60 , dan pada tekanan atmosfer. Hasil penelitian menunjukan bahwa penambahan konsentrasi katalis NaOH 2% meningkatkan yield crude biodiesel menjadi 71,03%, densitas dan viskositas crude biodiesel yang mendekati standar SNI adalah 833,75 kg/m3 dan 1,3579 cSt dengan kondisi operasi pada suhu 50oC dan konsentrasi katalis NaOH 2%.

Pengaruh Suhu Proses Sokletasi dan Volume Pelarut n-heksana terhadap Yield Minyak Atsiri Jeruk Lemon Fania Zulfa Salsabila; Rosyidah Khoirunnisa Mahdan; Ghusrina Prihandini; Robby Sudarman; Fitria Yulistiani
Fluida Vol 15 No 2 (2022): FLUIDA
Publisher : Jurusan Teknik Kimia, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v15i2.4409

Essential oils are volatile compounds found in lemon peels. Essential oils are used in addition to soaps, perfumes, and candles because of their fresh aroma. Essential oils can be extracted using solid-liquid extraction. Soxhlet extraction was chosen because the process is continuous and requires less solvent than the percolation method. The solvent N-Hexane was chosen because its polar value was close to the polarity of the essential oil. Soxhlet extraction was carried out with variations in process temperature (70, 75, and 80°C) and solvent volume (16, 240, and 320ml). Previously, the lemon peel was pre-treated by drying (<100°C, 1 hour) and grinding. After extraction, the essential oil was added with anhydrous (Na2SO4). The best results were obtained at a process temperature of 80°C and a solvent volume of 320 ml yielding 3.25%. The increase in process temperature and solvent volume increases the yield of essential oils. Based on the results of the GC-MS analysis, lemon essential oil contains limonene (41.06%) and citral (12.2%). The content of limonene gives the aroma, and the content of citral gives color to the lemon essential oil. Abstrak Minyak atsiri merupakan senyawa volatile yang banyak ditemukan pada kulit jeruk lemon. Minyak atsiri digunakan sebagai tambahan sabun, parfum, dan lilin karena aromanya yang segar. Minyak atsiri dapat diambil menggunakan ekstraksi padat-cair. Ekstraksi sokletasi dipilih karena prosesnya kontinyu dan membutuhkan lebih sedikit pelarut dibandingkan metode perkolasi. Pelarut N-Heksana dipilih karena nilai polarnya mendekati kepolaran minyak atsiri. Ekstraksi sokletasi dilakukan dengan variasi suhu proses (70, 75, dan 80°C) dan volume pelarut (160, 240, dan 320ml). Sebelumnya dilakukan pre-treatment pada kulit jeruk lemon berupa pengeringan (<100°C, 1jam) dan penghalusan. Setelah diekstraksi, minyak atsiri diberi tambahan anhidrat (Na2SO4). Hasil terbaik diperoleh pada suhu proses 80°C dan volume pelarut 320 ml dengan hasil yield 3,25%. Peningkatan suhu proses dan volume pelarut meningkatkan yield minyak atsiri. Berdasarkan hasil analisis GC-MS minyak atsiri jeruk lemon mengandung limonene (41,06%), dan citral (12,2%). Kandungan limonene memberikan aroma dan kandungan citral memberikan warna pada minyak atsiri jeruk lemon.

Economical sustainability of integrated photo voltaic and hydroponic systems for rural areas Conny K Wachjoe; Hermagasantos Zein; Annisa Syafitri Kurniasetiawati; Teguh Sasono; Yanti Suprianti; Fitria Yulistiani
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 7 No. 1 (2022)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v7i1.22938

Hydroponic plantations are an effort of future agricultural technology, and this is due to population growth and increasingly saving agricultural land. Besides that, hydroponics can trigger rural economic development by opening employment opportunities for rural areas. The realization of hydroponics in rural areas that are not connected to the grid can use solar energy to circulate water continuously. The components of photo voltaic systems have been designed to the needs of the hydroponic system. Photo voltaic technology has been used for a long time for lighting in remote areas. Integrating the photo voltaic system with hydroponics is a synergistic effort to use energy productively. The case the demand for vegetables in rural areas is minimal, with limited land and the level of land productivity that depends on the availability of fertilizers. The economical method for analyzing the integrating system of photovoltaic and hydroponic systems is based on PBP, CCP, and ROROI. The results obtained for kale based on the PV-hydroponic integration system have a return on investment (PBP) of 13.5 months, cumulative cash posit (CCP) of 1.84, and Rate of Return on Investment (ROROI) of 8.01%. Adding the second and third hydroponic plant modules can reduce PBP to 6.2 months and 5.2 months, respectively. Likewise, CPP increased from 1.84 to 3.68 and 5.21, respectively. Meanwhile, ROROI rose from 8.01% to 11.43% and 13.34%, respectively.

Penentuan Kesetimbangan Leaching Antosianin dari Kelopak Bunga Rosella Menggunakan Continuous Screw Extractor Fitria Yulistiani; Nurcahyo Nurcahyo
Fluida Vol 14 No 1 (2021): FLUIDA
Publisher : Jurusan Teknik Kimia, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v14i1.3390

Rosella merupakan salah satu sumber zat antosianin. Antosianin diambil dari kelopak bunga rosella menggunakan metode leaching. Penelitian ini dilakukan untuk menentukan tahap kesetimbangan leaching antosianin dari kelopak bunga Rosella menggunakan continous screw extractor. Tahapan leaching dimulai dengan penyaringan dan pengecilan ukuran kelopak bunga rosella. Selanjutnya, dilakukan variasi rasio pelarut dan padatan (L/S) pada tahap maserasi. Konsentrasi hasil ekstrak (overflow) dan cairan hasil perasan (underflow) digunakan untuk membuat diagram kesetimbangan yang kemudian digunakan untuk perancangan dan penentuan jumlah tahap kesetimbangan. Rasio pelarut dan padatan yang digunakan pada screw extractor yaitu 1,5:1, waktu kontak efektif 411 detik, laju alir pelarut air 1,633 g/detik, dan laju alir padatan 1,089 g/detik. Dengan menggunakan diagram kesetimbangan, didapatkan NTU (Number of Transfer Unit) sebesar 4 tahap, panjang kolom (Z) sebesar 0,42 m, dan nilai HTU (Height of Transfer Unit) sebesar 0,12 m.

Pengaruh Daya dan Waktu Terhadap Yield Hasil Ekstraksi Minyak Daun Spearmint Menggunakan Metode Microwave Assisted Extraction Fitria Yulistiani; Rizka Khairiyyah Azzahra; Yulinda Alhay Nurhafshah
Jurnal Teknik Kimia dan Lingkungan Vol. 4 No. 1 (2020): April 2020
Publisher : Politeknik Negeri Malang

Spearmint is one type of mint that contains essential oil with carvone (60-70%) as its main component. That component causes mint’s essential oil has antioxidant, antifungal and antibacteria properties. The traditional method to produce essential oil like steam distillation has long and energy consuming processes. The aims of this research were to investigate the influence of microwave power level (100, 180 and 300 Watt) and the extraction time (5, 10, 15 and 20 minutes) used Microwave Assisted Extraction to mint oil’s yield. Furthermore, characterization determined by oil’s colour, refractive index and density. The analysis of chemical component of mint oil was done using Gas Chromatography – Mass Spectrometry (GC-MS). The power level of microwave and extraction time influence to mint oil’s yield is proven in this research. The highest yield (5.17%) is generated at best variation of power and extraction time from the research are at 180 Watt and 15 minutes extraction time. The colour of mint oil is light yellow, refractive index value is 1.362 and density is 0.8758 gram/mL. The result of GC-MS showed that the major component of mint oil is 71% carvone.

Fermentasi Anaerobik Biogas Dua Tahap Dengan Aklimatisasi dan Pengkondisian pH Fermentasi Purwinda Iriani; Yanti Suprianti; Fitria Yulistiani
Jurnal Teknik Kimia dan Lingkungan Vol. 1 No. 1 (2017): October 2017
Publisher : Politeknik Negeri Malang

Generally, biogas production on the household scale is using one-stage anaerobic fermentation technology, which accommodates two main processes of biogas production, namely acetogenesis and methanogenesis. An obstacle of using one-stage biogas digester is the imbalance of the fermentation process that indicated by the increase of organic load rate and shorter retention time that lead to un-optimal biogas productivity. This research undertook the application of two-stage anaerobic digestion, supported by adjusting the initial pH for both acetogenic and methanogenic processes. Firstly, the research initiated by acclimatization (activation) process of acetogenic and methanogenic bacteria via fermentation in laboratory scale (19 L) digesters, separately. The results of acetogenic bacteria acclimatization process on cow dung media showed the pH stability needed for the reaction acetogenic, in the range of 5-6, while the control showed the pH changes still in the neutral pH range (6-7). The substrate from lab-scale acetogenic and methanogenic digester, then used as a starter for pilot-scale digester (125 L and 500 L, respectively). The mixture of water and cow dung were adjusted at initial pH 5.5 on acetogenic digester for 2 weeks. Those material were used for biogas production in the methanogenic digester. The result of the methanogenic process showed an increasing volume of biogas and the composition of methane (CH4) in the biogas. The highest CH4 composition was obtained on the 20th day, which reached 74.82%, and the highest volume of biogas production was at day 22, with the rate of 8.87 L/day. The highest energy potential obtained was 217.66 kJ/day.

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

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.

The Effect of Maltodextrin Concentration and Spray Dryer Drying Temperature on the Characteristics of Coconut Milk Powder Fitria Yulistiani; Alifia Nuraeni; Sheilla Aulia Sofiatul Mardiah; Irwan Hidayatulloh; Lidya Elizabeth; Nurcahyo
Fluida Vol 16 No 1 (2023): FLUIDA
Publisher : Jurusan Teknik Kimia, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v16i1.4006

Coconut milk has a higher water content than other contents, so microbes can easily damage and spoil it. To obtain a low-moisture powder product, the liquid coconut milk was dried using a Buchi Mini Spray dryer B-290 with inlet temperatures of 150°C, 160°C, and 170°C. The researchers added maltodextrin to coconut milk, which had a ratio of grated coconut to the water of 1:3, in concentrations of 9%, 10%, 11%, 12%, and 13%. The addition of maltodextrin and the use of drying temperature did not significantly affect the pH, solubility, and percentage of product mass but did significantly affect the moisture content. The best operating conditions for producing coconut milk powder were at a maltodextrin concentration of 13% and a temperature of 170°C. Under these conditions, the produced coconut milk powder had a pH value of 6.12, a moisture content of 4.56%, a solubility of 98.74%, a product mass of 24.99 grams and an overall percentage of product mass of 21.32%.

Co-Authors Alifia Nuraeni Astrinida Rizkina Dwi Pancani Fania Zulfa Salsabila Heriyanto Hermagasantos Zein Hidayatulloh, Irwan Keryanti, Keryanti Kurnia, Dianty Rosirda Dewi KURNIASETIAWATI, ANNISA Lidya Elizabeth Linda Maulani Mariatha Martha Miranti Agustina Muhari, Emma Hermawati Nadya Amelinda Zahar Nancy Siti Djenar Naura Alfairuzy Quluby Neila Zakiah Hanun Nisya Qonita Zahra Nurcahyo Nurcahyo, Nurcahyo Permanasari, Ayu Ratna Prihandini, Ghusrina PURWINDA IRIANI Revani Triananda Rizka Khairiyyah Azzahra Rizka Khairiyyah Azzahra Robby Sudarman Rosyidah Khoirunnisa Mahdan Royfa Fenandita Finadzir Rusdiyana Nur Putri Salimi Sheilla Aulia Sofiatul Mardiah Shoelarta, Shoerya Sihombing, Rony Pasonang Teguh Sasono Utary Nur Rachmani Fauzan Wachjoe, Conny K. Wulan Suci Ramdhayani YANTI SUPRIANTI, YANTI Yaumi Istiqlaliyah Yulinda Alhay Nurhafshah Yulinda Alhay Nurhafshah

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