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All Journal Reaktor TEKNIK METANA Jurnal Ilmu Lingkungan JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Bulletin of Chemical Reaction Engineering & Catalysis Majalah Ilmiah MOMENTUM JITEK (Jurnal Ilmiah Teknosains) Jurnal Aplikasi Teknologi Pangan Communications in Science and Technology Abdimas UNWAHAS : Jurnal Pengabdian Masyarakat UNWAHAS Jurnal Inovasi Teknik Kimia ASEAN Journal of Chemical Engineering Jurnal Profesi Insinyur Indonesia Bulletin of Chemical Reaction Engineering & Catalysis

Nita Aryanti

Chemical Engineering Department, Faculty Of Engineering, Diponegoro University, Jl. Prof. Sudarto, Tembalang-Semarang, 50275, Telp/fax: (024)7460058/(024)76480675

Author-ID : 234463

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Social Sciences Transportation Veterinary Other

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KINERJA MEMBRAN ULTRAFILTRASI UNTUK PENGOLAHAN LIMBAH EMULSI MINYAK-AIR SINTETIS Nita Aryanti; Indah Prihatiningtyas; Diyono Ikhsan; Dyah Hesti Wardhani
Reaktor Volume 14, No. 4, OKTOBER 2013
Publisher : Dept. of Chemical Engineering, Diponegoro University

Kegiatan pengilangan minyak bumi untuk memenuhi kebutuhan bahan bakar menghasilkan limbah cair emulsi minyak-air. Pengolahan limbah emulsi minyak-air dengan metode konvensional belum mampu untuk menerapkan prinsip reuse dan recycle karena hasil pengolahan limbah hanya dibuang ke perairan. Selain itu, proses konvensional menimbulkan produk samping berupa sludge yang tidak diinginkan.Membran ultrafiltrasi telah banyak digunakan untuk pengolahan limbah berminyak. Pada penelitian ini digunakan umpan model limbah emulsi minyak dengan fasa terdispersi berupa minyak pelumas, bensin dan solar.Fasa kontinu adalah air, sedangkan surfaktan adalah sebagai mediator.Minyak pelumas, bensin dan solar digunakan untuk mewakili limbah kilang minyak bumi yang berasal dari kolom-kolom distilasi serta limbah yang berasal dari utility plant, misalnya limbah bahan bakar solar.Penggunaan model limbah pengilangan bertujuan untuk mendapatkan pemahaman yang lebih detail tentang kinerja membran ultrafiltrasi untuk pengolahan limbah emulsi minyak bumi. Pengujian kinerja membran ultrafiltrasi dilakukan dengan mengetahui profil fluks dan rejeksi. Karakterisasi membran menunjukkan bahwa membran polyethersulfone yang digunakan merupakan membran ultrafiltrasi asimetrik dengan permeabilitas 17,32 (l/m2.jam.bar). Profil fluks emulsi bensin, minyak pelumas dan solar menunjukkan bahwa penurunan fluks bensin yang tertinggi. Selain itu dapat dilihat bahwa membran polyethersulfone yang digunakan mampu merejeksi COD sebesar 98% dan minyak sebesar 98% untuk umpan emulsi bensin. Untuk emulsi minyak pelumas, 94% COD dan 99% minyak dapat direjeksi, sedangkan untuk umpan emulsi minyak solar, rejeksi COD sebesar 90% dan rejeksi minyak sebesar 98%.

Application of Square and Oblong Pore Shapes in Rotating Membrane Emulsification to Produce Novel Particulate Products Nita Aryanti; Richard Andrew Williams; Qinchung Yuan
Reaktor Volume 20 No.1 March 2020
Publisher : Dept. of Chemical Engineering, Diponegoro University

Rotating membrane emulsification (RMR) has been intensively developed and applied for producing emulsion as well as particulate products such as microcapsules. Polyurea microcapsules were generally prepared by interfacial polycondensation polymerisation with addition of modifier to produce more stable microcapsules. In this research, development of the RMR was applied for producing polymer particles stabilised by nanoparticle without any addition of surfactant or modifier. Two types of membrane pores, the square (Type-A) with hydraulic diameter (Dh) of 84 mm and oblong pores with an aspect ratio of 0.33 (Type-B) having Dh of 69 mm was investigated. For the membranes designed in this research, pore shape A membrane could produce good uniformity in both polyurea microcapsule and polymer particle. In the polymer stabilised particle, this membrane type obtained a narrower size distribution than the usage for o/w emulsification. Reasonable uniform particles at high membrane rotation speed could also be achieved with the use of Type-A membrane. The uniformity confirmed that there was only minor breakup of products during operation at high membrane rotation. This attractive feature was significant in the production of fragile or shear-sensitive particulate products since the delicate structure of these products is possibly easy to destroy at high membrane rotation speed. Keywords: polyurea microcapsules; particles stabilised nanoparticles; slotted pore

Composite Encapsulating Agent for NaFeEDTA Microencapsulation Using Spray Drying Method Handayani, Noer Abyor; Aryanti, Nita; Haryani, Kristinah; Hargono, Hargono; Adina, Alifia Rizki; Yuliani, Sari; Adristy, Vania Zulfa
Reaktor Volume 25 No.2 August 2025
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.25.2.%p

Iron microencapsulation is one of the solutions to protect iron from reacting with other substances that result in quality declines of fortified food products. The coating materials used should be appropriate for the specified encapsulation process. This study combined glucomannan and maltodextrin as coating materials and added HPMC as an additive to encapsulate NaFeEDTA. The results showed that such a combination could increase the encapsulation efficiency. The morphologies of the resulting microcapsules obtained from four formulations applied in this study were identical; numerous wrinkles appear on the particle’s surfaces due to the presence of HPMC. All formulations had a narrow size distribution with an average particle size between 105 and 111 µm, thermal resistance up to a temperature of ± 200°C, and the same functional groups but with different intensities. The NaFeEDTA included in all formulations had a bioavailability value of 2.3 - 2.9%. The best formulation, based on the gastrointestinal digestion simulation, was shown by the formulation with a glucomannan:maltodextrin ratio of 2:3 (in 1% w/v coating material) with a release percentage of 64.28% in SGF solution and an increase of 2.27% in SIF solution. To prevent anemia, ± 400 mg of iron microcapsules resulting from the best formulation in this study are required to meet 75% of the daily intake.

Co-Authors Adina, Alifia Rizki Adristy, Vania Zulfa Aininu Nafiunisa Aininu Nafiunisa Aji Prasetyaningrum Amelia Maharani Amelia Maharani Andri Cahyo Kumoro Anisah Nirmala Cindika Kusuma Dewi Daliman, Daliman Danny Soetrisnanto Dessy Kurniawati Dessy Kurniawati Didi Dwi Anggoro Diyono Ikhsan Dyah Hesti Wardhani Fathia Mutiara Willis Fatoni Nugroho Febrian Murvianto Fella Ryanitha A. Hargono Hargono Henny Ikka Safitri Heri Cahyono I Nyoman Widiasa Indah Prihatiningtyas Ken Dimas Yogananda Khairil Anwar Kharis Yohan Abidin, Kharis Yohan Khoiriyah, Lu'luatul Kristinah Haryani Luqman Buchori Maria Widyasmara Nafiunisa, Aininu Noer Abyor Handayani Permanadewi, Indrasukma Qinchung Yuan Ragil Darmawan SAC RATNAWATI Richard Andrew Williams Setia Budi Sasongko Wida Rahmawati Wida Rahmawati Yovita Asih Kusumastuti Yovita Asih Kusumastuti Yuliani, Sari Yusiana Dewi Afriyani Zakki, Abdurrahman

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