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All Journal Reaktor Jurnal Riset Kimia World Chemical Engineering Journal JURNAL INTEGRASI PROSES Jurnal Teknika Aplikasia: Jurnal Aplikasi Ilmu-Ilmu Agama Jurnal Riset Teknologi Pencegahan Pencemaran Industri JURNAL REKAYASA KIMIA & LINGKUNGAN
Meri Yulvianti
Universitas Sultan Ageng Tirtayasa
Religion Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Social Sciences Other

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Optimaslisasi Kinerja Zeolit Alam Bayah Sebagai Katalis Untuk Pembuatan Triacetin Sebagai Aditif Premium Yulvianti, Meri; Nuryoto, .; Sobari, Muhammad Iqbal; Rijal, Sahrul
TEKNIKA Vol 12, No 1 (2016): Juni
Publisher : Fakultas Teknik Universitas Sultan Ageng Tirtayasa

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Abstract

Dewasa ini pengembangan energi alternatif sangat banyak dilakukan untuk mengatasi permasalahan energi, salah satunya adalah pembuatan biodiesel yang memiliki produk samping berupa gliserol. Seiring berkembangnya produksi biodiesel maka gliserol yang dihasilkan pun akan mengalami peningkatan. Pengolahan gliserol menjadi aditif berupa triacetin dapat menjadi alternatif dalam mengatasi melimpahnya gliserol dan dapat menjadi terobosan baru untuk menaikan angka oktan premium dan angka setana pada minyak diesel. Penggunaan katalisator padat berupa zeolit alam Bayah dimaksudkan untuk mengurangi ketergantungan terhadap katalisator impor dan menggali potensi alam yang belum termanfaatkan secara maksimal. Tujuan penlitian ini menentukan kondisi optimal zeolit dalam pembuatan triacetin dengan melakukan variasi pengadukan, suasana kondisi reaksi dan persen berat zeolit. Dan untuk diharapkan dapat menghasilkan teknologi baru yang sederhana, ekonomis dan ramah lingkungan serta dapat memberikan manfaat berupa pemecahan masalah produk samping dari proses pembuatan biodiesel sehingga dapat meningkatkan nilai ekonomi dari produksi biodiesel tersebut. Penelitian ini dilakukan pada reactor batch. Kondisi optimal yang dicapai dalam pembuatan triacetin ini adalah pada kecepatan 600 rpm, perbandingan massa katalis 3% dan rasio perbandingan mol reaktan 1:3 mol gliserol : mol asam asetat, dengan konversi sebesar 89,90 %.
Kinetika Release Mikrokapsul Oleoresin Jahe Merah Jayanudin Jayanudin; R Rochmadi; Meri Yulvianti; Ahmad Imanudin; Tri Rina Sari
Reaktor Volume 16 No.3 September 2016
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (730.468 KB) | DOI: 10.14710/reaktor.16.3.128--140

Abstract

Abstract RELEASE KINETICS OF RED GINGER OLEORESIN MICROCAPSULES. Red ginger oleoresin microcapsule is used to protect the active component of medicine against the negative effect of the environment, thus the microcapsule can be applied in the pharmaceutical industries. Kinetic release is used to determine the rate of red ginger oleoresin microcapsule release in human body system. The models used for this purpose are zero order, first order, Higuchi, and Korsmeyer-Peppas. These models were completed by using graphical method to get the determination coefficient (R2). The aims of this research are to determine the effect of Tripolyphosphate (TPP) concentration towards microcapsule release, to determine the red ginger oleoresin microcapsule kinetic release, and to characterize the morphology and particle sizes of red ginger oleoresin microcapsule using the Scanning Electron Microscopy (SEM). The encapsulation method was started by emulsifying process of chitosan-alginate, with various ratios of Chitosan-Alginate such as 1:2, 1:1, 2:1, and 20 gram red ginger oleoresin, and also the addition of TPP, with various concentrations for as much as 3%, 4 %, and 5%, as the crosslinking agent. The emulsion was forwarded to the spray dryer machine to produce the red ginger oleoresin microcapsule. Then, the microcapsule was treated with the mixture of KH2PO4 and NaOH (pH 6.8) for 1 hour, and sample was taken for every 10 minutes for the dissolution test. The result showed that the increase of TPP concentration will reduce the release velocity of the active compound. Kinetic model with the highest value of R2 was the Korsmeyer-Peppas model. Keywords: alginate; encapsulation; release kinetics; chitosan red ginger oleoresin;   Abstrak Mikrokapsul digunakan untuk melindungi oleoresin jahe merah yang sensitif terhadap pengaruh lingkungan, sehingga dapat diaplikasikan dalam bidang farmasi. Kinetika release digunakan untuk menentukan kecepatan release mikrokapsul oleoresin jahe merah, model yang digunakan adalah model order nol, order satu, model Higuchi, dan Model Korsmeyer-Peppas. Penyelesaian model-model ini menggunakan metode grafis dengan menentukan koefisien determinasi (R2). Tujuan penelitian ini adalah menentukan pengaruh konsentrasi sodium tripolifosfat (TPP) dan rasio berat antara kitosan dan alginate sebagai penyalut terhadap kinetika release dan karakterisasi morfologi mikrokapsul oleoresin jahe merah.  Metode enkapsulasi dimulai dengan pembentukan emulsi dari penyalut kitosan-alginat dengan rasio 1:2; 1:1; 2:1 dan 20 gram oleoresin jahe merah, penambahan TPP 3%, 4% dan 5% untuk cross-link. Emulsi dialirkan ke spray dryer untuk menghasilkan mikrokapsul oleoresin jahe merah. Uji disolusi menggunakan medium basa dengan mencampurkan KH2PO4 dan NaOH (pH 6,8) sampel diambil tiap 10 menit selama 1 jam. Hasil penelitian yang telah dilakukan didapat peningkatan konsentrasi TPP akan menurunkan kecepatan releasenya, model model kinetika dengan nilai R2 terbesar adalah model Korsmeyer-Peppas. Kata kunci: alginat; enkapsulasi; kinetika release; kitosan; oleoresin jahe merah
PEMANFAATAN AMPAS KELAPA SEBAGAI BAHAN BAKU TEPUNG KELAPA TINGGI SERAT DENGAN METODE FREEZE DRYING Meri Yulvianti; Widya Ernayati; Tarsono Tarsono; M. Alfian R.
JURNAL INTEGRASI PROSES VOLUME 5 NOMOR 2 Juni 2015
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (897.492 KB) | DOI: 10.36055/jip.v5i2.246

Abstract

Industri pengolahan kelapa menghasilkan produk samping berupa ampas kelapa. Selama ini ampas kelapa hanya dimanfaatkan sebagai pakan ternak dengan harga produk yang sangat rendah. Ampas kelapa dapat diolah menjadi tepung ampas kelapa yang kaya akan serat dan relatif lebih rendah lemak. Kandungan protein, lemak, dan serat pada ampas kelapa ini merupakan salah satu kandungan yang sangat dibutuhkan untuk proses fisiologis dalam tubuh manusia. Tujuan penelitian ini adalah menentukan waktu pengeringan terbaik dalam pembuatan tepung  ampas  kelapa  dengan metode pengeringan  freeze  drying.  Prinsip  freeze  dryer adalah pengeringan dengan proses sublimasi untuk menjaga stabilitas rasa, warna, aroma dan struktur. Pengeringan ampas kelapa dengan freeze dryer dilakukan dengan beberapa variasi waktu pengeringan, yaitu 18 jam,  22 jam, 24 jam, 42 jam, 46 jam, dan 48 jam. Penentuan mutu ampas kelapa berdasarkan kandungan gizi yang terdapat di dalam produk, melalui analisa dengan metode Kjeldahl, Soxhletasi, dan pengeringan dengan oven untuk menentukan kandungan nilai gizi dengan beberapa parameter yaitu kadar air, kadar serat, kadar lemak, dan kadar protein. Berdasarkan hasil analisa, metode terbaik pengeringan freeze drying dilakukan selama 18 jam hingga 24 jam sehingga diperoleh kadar air 0,33%, kadar serat 37,1%, kadar lemak 12,0% dan kadar protein 4,12%. 
PENGARUH PERBANDINGAN CAMPURAN PELARUT N-HEKSANA- ETANOL TERHADAP KANDUNGAN SITRONELAL HASIL EKSTRAKSI SERAI WANGI (Cymbopogon nardus) Meri Yulvianti; Rosianah Meida Sari; Efa Rujatul Amaliah
JURNAL INTEGRASI PROSES VOLUME 5 NOMOR 1 DESEMBER 2014
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (839.049 KB) | DOI: 10.36055/jip.v5i1.31

Abstract

Sitronelal adalah cairan tak berwarna, dengan bau menyegarkan dan mempunyai sifat racun dehidrasi (desiccant). Racun tersebut merupakan racun kontak yang dapat mengakibatkan kematian karena kehilangan cairan terus- menerus. Serangga yang terkena racun ini akan mati karena kekurangan cairan. Kualitas minyak sereh wangi ditentukan oleh komponen utama di dalamnya yaitu kandungan sitronelal. Sehingga penelitian ini dilakukan untuk mengetahui perbandingan volume campuran pelarut n-heksana-etanol yang terbaik terhadap kandungan   sitronelal   dalam   minyak   serai   wangi.   Metode  penelitian   yang digunakan terdiri dari dua tahap, tahap pertama yaitu dengan mengekstraksi serai wangi (batang, daun) sebanyak 10 gram, dengan menggunakan campuran pelarut n-heksana-etanol (1:1, 1:4, 2:3, 3:2, 4:1) selama 4 jam pada suhu 78-80oC, dari proses ekstraksi dihasilkan minyak serai yang masih bercampur dengan pelarut. Tahap selanjutnya yaitu tahap pemurnian dengan proses destilasi untuk memisahkan  minyak  serai  dari  campuran  pelarut,  proses  destilasi  dilakukan selama 2 jam pada suhu 78-80oC, dari tahap ini akan dihasilkan ekstrak minyak serai. Selanjutnya minyak serai yang dihasilkan dianalisa dengan menggunakan GC-MS untuk mengetahui kadar sitronelal yang dihasilkan dari setiap perbandingan. Dari hasil penelitian dan analisa yang didapatkan kadar sitronelal terbesar yaitu 27,3% pada perbandingan volume pelarut 3:2 untuk bagian batang dan 10,9% pada perbandingan volume pelarut 4:1 untuk bagian daun. 
PENGARUH IMPREGNASI KOH PADA KATALIS BENTONIT BOJONG MANIK LEBAK BANTEN DALAM SINTESIS BIODIESEL DARI MINYAK JELANTAH Rudi Hartono; Muhammad Triyogo Adiwibowo; Meri Yulvianti; Agus Rochmat; Ali Faozin; M. Abdurahman Aziz; Sartika Arbantini
JURNAL INTEGRASI PROSES VOLUME 11 NOMOR 1 JUNI 2022
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/jip.v11i1.14723

Abstract

Biodiesel is an alternative fuel from renewable resources that is more environmentally friendly. This study aimed to obtain the optimum conditions for making biodiesel from used cooking oil based on the percentage of NaOH impregnation on bentonite catalysts from Bojong Manik Lebak Banten. The biodiesel synthesis method used is base transesterification. The impregnation process prepared bentonite as a catalyst at variations of %KOH, namely 20, 26, 31, and 35% (w/w). The biodiesel reaction was carried out at a temperature of 60°C and a reaction time of 3 hours using a 3% catalyst for the amount of used cooking oil. The results were obtained at optimum conditions on a catalyst of 26% KOH (w/w) with a biodiesel yield of 91.2%, density of 0.870 g/mL, the viscosity of 4.1 cSt, the flash point of 129°C, and methyl ester content of 97.48%.
PENGOLAHAN LIMBAH ORGANIK RUMAH TANGGA SEBAGAI PUPUK ORGANIK CAIR DI KABUPATEN PANDEGLANG Yeyen Maryani; Agus Rochmat; Herayati; Meri Yulvianti
Aplikasia: Jurnal Aplikasi Ilmu-ilmu Agama Vol. 22 No. 2 (2022):
Publisher : UIN Sunan Kalijaga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/aplikasia.v22i2.2912

Abstract

The waste problem was one of the priorities of the local government. The waste sorting business started from the beginning, but the management and reprocessing of waste was a separate homework from the Environment Agency. The Untirta Community Service Team offered the processing of organik waste into Liquid Organik Fertilizer (POC) through a fermentation process with the used of EM4. The fermentation process for 7-15 days produced POC which has essential nutrients needed by plants. Giving 1:1 POC to plants increased more fruit and increased color brightness in ornamental plants. Socialization and training activities were carried out in 2 farmer groups in Pandeglang Regency. Direct practice of making POCs and the team giving POCs to participants so that they can be applied directly in their respective places. The socialization activities were supported by the village government and support from the Pandeglang Regency Agricultural Extension Center.
The Influence of Kerosene to Increase the Quality of Coal from Bayah South Banten Using UBC Methode Heriyanto, Heri; Ernayati, Widya; Yulvianti, Meri; Sutijan, Sutijan
World Chemical Engineering Journal VOLUME 1 NO. 1 JUNE 2015
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v1i1.262

Abstract

The increasing price and the decreasing stock of fossil fuel nowadays are two factorsthat make the use of alternative fuel with lower price become necessity. The source ofenergy that can be used to fill the gap between convensional fossil fuel towards cleanerand renewable energy is Coal. South Banten has a massive stock of coal, around 70% ofall the mineral sources in South Banten, but the quality of the coal is low, due to thesulfur content around 2.28 % dry basis and a high water content that lead to the lowestcalor content. The aim of this research is to lowering the sulfur and water content ofthe coal. Upgrading Brown Coal methode is the methode used to reach the aim stated.The research was settle at temperature 150: C, pressure 350 kPa, and addition ofkerosene as the solvent. The result of the research shows the increasing of calorcontent and the decreasing sulfur content when the evaporation temperature graduallyincreased.
PENGARUH PENAMBAHAN RICE BRAN WAX PADA COATING FILM BERBASIS KITOSAN JAMUR TIRAM TERHADAP PENYUSUTAN BERAT DAN pH BUAH TOMAT Nufus Kanani; Muhammad Triyogo Adiwibowo; Indar Kustiningsih; Heri Heriyanto; Rusdi Rusdi; Harly Demustila; Wardalia Wardalia; Endarto Yudo Wardhono; Widya Ernayati Kosimaningrum; Meri Yulvianti; Muhammad Gofar; Ila Maghfirotul Fahira
JURNAL INTEGRASI PROSES Vol 13, No 1 (2024)
Publisher : JURNAL INTEGRASI PROSES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jip.v13i1.25753

Abstract

Tomat (Solanum lycopersium L) merupakan buah yang memiliki kandungan air yang tinggi, sehingga mudah mengalami kerusakan dan mengurangi masa simpan tomat. Coating film pada tomat dapat berfungsi untuk melindungi tomat dari kerusakan fisik dan kimia. Kitosan jamur tiram sebagai bahan dasar pembentukan coating film memiliki kelebihan yaitu bersifat kuat dan fleksibel, namun kitosan memiliki kelemahan, yaitu bersifat hidrofilik sehingga perlu penambahan bahan lain untuk memperbaiki karakteristiknya, yaitu dengan penambahan rice bran wax. Penelitian ini dilakukan melalui tahapan pelarutan kitosan dalam asam asetat, penambahan rice brand wax 20-50% (w/v), pembentukan coating film menggunakan metode grafting dengan bantuan gelombang ultrasonik pada temperatur 90°C selama 10-60 menit, dan pengaplikasian coating film pada tomat. Dari penelitian yang dilakukan diperoleh hasil tomat tanpa coating yang dianalisis selama 7 hari menunjukkan tanda pembusukan, sedangkan tomat dengan coating film tetap segar. Penambahan rice brand wax berpengaruh pada penurunan susut bobot tomat. Pada konsentrasi rice bran wax 1-5% menunjukkan bahwa coating film mampu mengurangi penyusutan berat tomat dibandingkan tanpa coating. Penurunan susut bobot tertinggi berturut-turut sebesar 7,88%; 7,71%; 5,8%; 4,57% dan 4,33%. Penambahan rice brand wax juga berpengaruh pada banyaknya gas etilen yang dihasilkan. Kadar gas etilen yang dihasilkan pada hari ke 7 dengan dan tanpa adanya pelapisan berturut-turut sebesar 7,89 dan 1,95 ppm.  
Synthesis of Lactic Acid from Molasses by Lactobacillus acidophilus Using a Batch Fermentation Process Rahmayetty, Rahmayetty; Yulvianti, Meri; Hartono, Rudi
Jurnal Rekayasa Kimia & Lingkungan Vol 17, No 2 (2022): Jurnal Rekayasa Kimia & Lingkungan (December, 2022)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v17i2.25657

Abstract

Lactic acid is a chemical with widespread applications, mainly in pharmaceutical, cosmetic, chemical as well as food industries. One of the major uses of lactic acid is the polylactic acid (PLA) feedstock which is biodegradable and biocompatible as an alternative to plastic derived from fossil fuels. Efforts continue to be made to reduce the cost of producing PLA in order to compete with the conventional petrochemical-based plastics. This include the use of molasses as a raw material because it is cheap and contains high glucose. The purpose of this study was to obtain cell concentrations through the addition of starter volume that produces high concentrations of lactic acid and to obtain the growth kinetics of Lactobacillus acidophilus during the fermentation process. This study was conducted in several stages; the design of bioreactors, inoculation of Lactobacillus acidophilus, and fermentation of molasses. In a batch system, molasses substrate was directly inserted as much as 500 ml in the fermentor and the addition of starter volume of Lactobacillus acidophilus was 1; 3; 5 dan 10% v/v. The fermentation of molasses for 72 hours and the product was analysed every 8 hours. The highest concentration of lactic acid produced in batch fermented molasses was added to 5% (v/v) starter volume with 72 hours of fermentation time, which was 23.1 mg/L, with value the carrying-capacity coefficient (k) and the maximum net specific growth rate (net) were 0.2379 h-1 and 0.0160 h-1 respectively.
Green Coconut (Cocos nucifera L.) Husk Extract as Milk Freshness Indicator in Chitosan/ Polyvinyl Alcohol-based Smart Packaging Films Barleany, Dhena Ria; Yulvianti, Meri; Jayanuddin, Jayanuddin; Rasyid Setiadi, Hilman; Mulyo Prasetyo, Rizky
Jurnal Riset Kimia Vol. 16 No. 1 (2025): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v16i1.738

Abstract

The growing demand for sustainable and eco-friendly food packaging has prompted research into innovative solutions that tackle environmental challenges and consumer health concerns. Food spoilage typically results from microbial activity, which is subsequently influenced by alterations in pH levels within the packaging environment. Plants, such as green coconut husk extract, contain anthocyanin, a water-soluble natural pigment with significant antioxidant and antibacterial properties, whose color changes in response to variations in the surrounding pH. This research focuses on the development of a pH-responsive packaging film utilizing chitosan and polyvinyl alcohol (PVA), integrated with green coconut (Cocos nucifera L.) husk extract, through a casting method to monitor milk freshness. An extraction procedure employing a maceration technique was conducted on green coconut husk utilizing methanol solvent with the incorporation of 1 % HCl (v/v). The thickness, mechanical properties, and pH-responsiveness of the resulting films with varying extract to chitosan volume ratios were examined in detail. The films were subsequently employed to monitor real-time applications concerning milk freshness. The results indicated that the addition of green coconut husk extract resulted in significant variations in the thickness, tensile strength, and elongation at the break of the film samples. The films exhibited thicknesses between 0.28 and 0.38 mm, demonstrating optimal mechanical properties at an extract-to-chitosan ratio of 4:1 (v/v), with tensile strength (TS) and elongation at break (EB) recorded at 4.65 MPa and 3.625%, respectively. The films exhibited a pH-sensitive color change from dark red to brown in acidic conditions. The findings indicate that the PVA/chitosan smart film, which contains green coconut husk extract, has the potential to serve as a deterioration indicator in packaged milk products.
Co-Authors Agus Rochmat Agus Rochmat Ahmad Imanudin Ali Faozin Alia Badra Pitaloka, Alia Badra Efa Rujatul Amaliah Endarto Yudo Wardhono Harly Demustila Hartono, Rudi Herayati, Herayati Heri Heriyanto Heri Heriyanto Ila Maghfirotul Fahira Jayanuddin, Jayanuddin Jayanudin Jayanudin Kosimaningrum, Widya Ernayati Kustiningsih, Indar M. Abdurahman Aziz M. Alfian R. Muhammad Gofar Muhammad Iqbal Sobari, Muhammad Iqbal Muhammad Triyogo Adiwibowo Mulyo Prasetyo, Rizky Najahtama, Muhammad Raja Nufus Kanani Nuryoto R Rochmadi Rahmayetty Rahmayetty Rasyid Setiadi, Hilman Rosianah Meida Sari Rudi Hartono Rusdi Rusdi Sahrul Rijal, Sahrul Sartika Arbantini Sutianingsih, Yulis Sutijan Tarsono Tarsono Tri Rina Sari Wardalia Wardalia Wibisana, Muhammad Aditya Widya Ernayati Kosimaningrum Yeyen Maryani