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All Journal Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Seminar Nasional Teknik Kimia Kejuangan Widyariset Jurnal Agrotek Tropika Journal of Engineering and Scientific Research (JESR) Jurnal Abdimas Mandiri Widyariset Abdimas Singkerru Jurnal Profesi Insinyur Universitas Lampung Prosiding Seminar Nasional Hasil Penelitian Sains, Teknik dan Aplikasi Industri Fakultas Teknik Universitas Lampung Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Teknologi dan Inovasi Industri Nemui Nyimah

Hermida, Lilis

Department Of Chemical Engineering, Universitas Lampung, Jl. Prof Sumantri Brojonegor No. 1 Gedong Meneng Rajabasa Bandar Lampung-35145 , Lampung, Indonesia

Author-ID : 699833

Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Neuroscience Physics Public Health Social Sciences Other

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Reusability Study of Sulfated Zirconia Functionalized SBA-15 Catalyst for Biolubricant Oil Production from Oleic Acid F R Rangganita; Lilis Hermida; A Angraeni; D Khoirunnisa
Journal of Engineering and Scientific Research Vol. 1 No. 1 (2019)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Sulfated zirconia functionalized SBA-15 catalsyt (SZr-SBA-15) was prepared by reacting SBA-15 with Zirkoniumoxychloride and urea at 90oC to form ZrO2-SBA-15. Then, ZrO2-SBA-15 was reacted with H2SO4 at room temperature to produce SZr-SBA-15 catalsyt.. The catalyst was characterized in terms of adsorptiondesorption nitrogen analysis, SEM-EDX and FTIR. Based on SEM-EDX and adsorption-desorption nitrogen analysis results, it was found that Zr had been incorporated in SBA-15. By using the SZr-SBA-15 catalyst, esterification reaction of oleic acid with TMP to produce biolubricant oil of Trimethylolpropanetrioleat achieved 85% oleic acid conversion and selectivity of 63,7%. Reusability study of SZr-SBA-15 catalyst was carried out for 3 rounds of reaction. It was found that the catalyst could be used up to 3 rounds without significant decrease in activity

IbM Pembuatan Keripik Jamur Tiram Dengan Teknologi Vakum Di Desa Sidosari, Lampung Selatan Lilis Hermida; Joni Agustian; Yunita Kesuma
Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Vol 1 No 3 (2017): Jurnal Sakai Sambayan
Publisher : Lembaga Penelitian dan Pengabdian Universitas Lampung

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Abstrak —Permasalahan utama yang dihadapi oleh petani jamur di desa Sidosari dan desa Sinar Harapan propinsi Lampung adalah sulitnya penanganan paska panen jamur tiram karena jamur tiram mudah rusak dan cepat membusuk. Sehingga harga jamur tersebut relatif rendah dan jangkauan pemasarannya terbatas, terutama pada musim hujan. Adapun solusi yang ditawarkan adalah sosialisasi/demonstasi pengolahan jamur tiram menjadi keripik jamur tiram dengan menggunakan mesin vacuum frying dan sosialisasi desain kemasan yang baik. Teknologi vakum dioperasikan pada suhu dan tekanan yang lebih rendah dibandingkan dengan penggorengan biasa sehingga keripik jamur tiram yang dihasilkan lebih renyah dan lebih bernutrisi. Sebelum sosialisasi, serangkaian percobaan dilakukan untuk mengetahui kondisi operasi terbaik mesin vacuum frying untuk menggoreng 1 kg jamur tiram segar. Pada percobaan tersebut, mesin vacuum frying dijalankan pada suhu 70 dan 80 oC sementara waktu penggorengan yang diamati adalah dari 20 hingga 50 menit. Dari hasil percobaan tersebut diketahui bahwa suhu 80 oC dan waktu penggorengan 40 menit adalah kondisi operasi yang terbaik mesin vacuum frying untuk menghasilkan keripik jamur. Setelah sosialisasi/demonstrasi penggunaan mesin vacuum frying tersebut, petani jamur berhasil menggoreng 1 kg jamur tiram segar dengan pendampingan. Kata kunci — Keripik jamur tiram, Desa Sidosari, Vacuum frying Abstract — The main problem faced by oyster mushroom farmers in Sidosari village and Sinar Harapan village in Lampung province was the difficulty of post-harvest handling of fresh oyster mushrooms because they are easily damaged and quickly decay. As such, the mushroom price was relatively low and its marketing scope was limited, especially in rainy seasons. The solution offered were the socialization/demonstration of processing of fresh oyster mushroom into oyster mushroom crisps by using a vacuum frying machine and socialization of a good packing design. The vacuum technology was operated at lower temperature and pressure compared to use conventional atmospheric frying so that oyster mushroom crisps produced were more crispiness and nutritious. Before the socialiation was held, several experiments were carried out to obtain the best operation condition of vacuum frying machine to fry 1 kg of fresh oyster mushrooms. In the experiments, vacuum frying was run at 70 and 80 oC, while the frying times observed were from 20 to 50 minutes. It was found that temperature of 80 oC and frying time of 40 minutes were the best conditions of the vacuum frying to produce mushroom crisps. After the socialization/demonstration of the vacuum frying uses, the farmers successfully fried 1 kg of raw oyster mushrooms under guidance. Keywords—— Oyster mushroom crisps, Sidosari village, Vacuum frying

Optimasi Proses Hidrolisis Pati Tapioka Menggunakan Glukoamilase Terimobilisasi pada Silika MCF 9.2T-3D Berdasarkan Response Surface Methodology (Box-Behnken Design) Joni Agustian; Lilis Hermida; Pia Sabrina Murtadho
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2018: PROSIDING SNTKK 2018
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Central Composite Statistical Design of Tapioca Starch Hydrolysis using Immobilized Glucoamylase on Mesostructured Cellular Foam Silica (MCF-9.2T-3D) Joni Agustian; Lilis Hermida; Ade Febriana Syahfitri
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2018: PROSIDING SNTKK 2018
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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SOLVENT EXTRACTION PROCESS FOR THE RECOVERY COBALT AND NICKEL FROM LOW-GRADE LATERITE USING BATCH RECYCLE SYSTEM Sudibyo Sudibyo; Agus Junaedi; Muhammad Amin; Slamet Sumardi; Fajar Nurjaman; Bramantyo Bayu Aji; Yayat Iman Supriyatna; Lilis Hermida
Widyariset Vol 4, No 2 (2018): Widyariset
Publisher : Pusbindiklat - LIPI

Low-grade laterite which contains nickel lower than 0.5 % is difficult to beprocessed using pyrometallurgy. One method which isable to solve this problem is solvent extraction. In thisstudy, a solvent extraction process using batch recycle methods has been successfully applied to separate nickel and cobalt from low-grade laterite. Sulphuric acid was used to leach laterite at atmospheric pressure. Meanwhile, cyanex in toluene was used as an organic solvent. Taguchi experimental design has been used to analyze and optimize the solvent extraction process using batch recycle methods. Taguchi analysis results show that the optimum conditions are at 7 of pH, 3 hours of time operation, 0.9 liter/minute of flow rate and 0.75 of organic/aqueous solutions ratio.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.4.2.2018.189-196

Penguasaan Perangkat Design Expert® Dalam R&D Produksi Untuk Ketrampilan Mengoptimasi Operator Proses PT. Tunas Baru Lampung (TBK) Bandar Lampung Joni Agustian; Lilis Hermida; Heri Rustamaji
Abdimas Singkerru Vol. 1 No. 2 (2021)
Publisher : Akademi Teknologi Industri Dewantara Palopo

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Sejalan dengan perkembangan industri, kemampuan operator produksi dalam inovasi diwujudkan dalam kegiatan penelitian dan pengembangan (litbang). Peningkatan ketrampilan operator terhadap perkembangan ilmu pengetahuan dan teknologi baru terkait dengan kemahiran program komputer sangat patut ditularkan dari kampus. Kegiatan PKM dilaksanakan di PT. Tunas Baru Lampung (TBK) yang merupakan suatu industri pabrik yang menghasilkan beragam produk komersial bagi masyarakat. Tujuan kegiatan ini adalah untuk melatih operator litbang agar menguasai perancangan dan pelaksanaan kegiatan litbang berbasiskan program komputer dengan target khusus meningkatakan kemampuan optimasi litbang, menganalisis data hasil menggunakan perangkat lunak dan melakukan justifikasi data hasil tersebut. Metode Participatory Rural Appraisal (PRA) dalam pembelajaran software Design Expert® dan kaji-tindak dalam bentuk uji-coba lapangan beserta analisis dan justifikasi hasil tes. Sosialisasi, pelatihan dan demonstrasi laboratorium dilakukan pada kegiatan PKM ini. Mayoritas peserta mampu dengan baik menggunakan program komputer untuk optimisasi produk proses yang tercermin dari perbedaaan pengetahuan peserta sebelum dan sesudah kegiatan dilaksanakan. Peningkatan persentase pengetahuan yang cukup baik mengindikasikan bahwa program PKM dapat berjalan dengan baik.

Roadshow 80 Tahun Teknik Kimia Indonesia: Presentasi Pendidikan Teknik Kimia dan Bidang Karir Alumni Kepada Para Guru Kimia Sekolah Menengah Atas/Kejuruan Joni Agustian; Lilis Hermida; Elida Purba
Abdimas Singkerru Vol. 2 No. 2 (2022)
Publisher : Akademi Teknologi Industri Dewantara Palopo

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Dalam empat tahun terakhir, persentase jumlah mahasiswa wanita di Jurusan Teknik Kimia Universitas Lampung adalah 55-70%, sehingga dipandang perlu untuk memperbesar jumlah mahasiswa pria dikarenakan bidang karir utama lebih didominasi tenaga kerja pria yang dipandang lebih mampu dan kuat untuk bekerja shift di industri manufaktur yang umumnya beroperasi secara kontinyu. Kegiatan ini bertujuan untuk memberikan masukan kepada para calon mahasiswa pria dan wanita melalui para guru kimia SMA dikarenakan latar belakang para guru yang mayoritas berasal dari Jurusan/Program Studi Pendidikan Kimia yang berada di Fakultas Keguruan dan Ilmu Pendidikan (FKIP). Kegiatan dilaksanakan dalam bentuk daring di Universitas Lampung. Evaluasi awal dan akhir pelatihan memperlihatkan adanya peningkatan pemahaman para guru terkait dengan bidang ilmu pendidikan teknik kimia.

The Optimised Statistical Model for Enzymatic Hydrolysis of Tapioca by Glucoamylase Immobilised on Mesostructured Cellular Foam Silica Joni Agustian; Lilis Hermida
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 2 Year 2019 (August 2019)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.14.2.3078.380-390

Enzymatic hydrolysis of starches using free glucoamylase to reducing sugars have difficulties in recovering and recycling of the enzyme, hence immobilisation on inert supports were widely studied. However, effectiveness of the immobilised glucoamylase were merely observed only on soluble starches. It was considered a valuable thing to know performance of glucoamylase on Mesostructured Cellular Foam (MCF) silica in hydrolysing of tapioca. An optimised study on enzymatic hydrolysis of tapioca using glucoamylase on MCF silica (9.2T-3D) and its kinetics were described including justification of the predicted model as it was required to develop in large scale operations. Central Composite Design was used to model the process by studying effects of three factors on DE values after enzyme immobilisation. Immobilisation of glucoamylase on this support gave up to 82% efficiency with the specific activity of 1,856.78 U.g-1. Its used to hydrolysis of tapioca resulted DE values of 1.740-76.303% (w/w) where the highest DE was obtained at pH of 4.1, temperature of 70 ℃ and agitation speed of 140 rpm. The optimisation produced a polynomial quadratic model having insignificant lack-of-fit and low standard deviation, so that it was applicable and reliable in simulating the DE with only 0.80% of data were not described. Temperature affected the process highly, but the buffer pH, agitation speed and factorial interactions were considered not important. KM value for immobilised enzyme was better than the free glucoamylase, however, its reaction rate was slower than the free glucoamylase catalysis. Copyright © 2019 BCREC Group. All rights reserved

Evaluasi Kinerja Sistem Elektrokoagulasi Batch Recycle Dengan Susunan Eleltroda Monopolar Dalam Mengolah Limbah Cair Tapioka Hermida, Lilis; Kustiani, Ika; Suharno
Jurnal Profesi Insinyur Universitas Lampung Vol. 1 No. 1 (2020)
Publisher : Fakultas Teknik Universitas Lampung

Pada penelitian ini elektrokoagulasi limbah cair tapioka dilakukan di reaktor yang beroperasi secara batch recycle, yang menggunakan beberapa pasang elektroda dalam susunan monopolar. Pengaruh variasi parameter operasi (besarnya arus listrik, jarak antar elektroda dan konduktivitas limbah cair tapioka) terhadap persentase penurunan kekeruhan air limbah diamati. Kemudian kondisi operasi yang optimal di investigasi menggunakan rancangan percobaan fractional factorial taguchi. Berdasarkan hasil percobaan dapat disimpulkan bahwa arus listrik sangat mempengaruhi persentase penurunan kekeruhan limbah cair tapioka. Kenaikan pH limbah terjadi selama proses berlangsung. Dengan pH influent tetap pada 7, setelah waktu reaksi selama 5 jam pH effluent menjadi 9,4 -9,6. Kondisi optimum diperoleh pada arus listrik 0,4 A, jarak antar elektroda 1,5 cm, dan konduktivitas influent 2500 mS dengan pH 7, laju alir 9 l/jam dan waktu pengolahan 5 jam. Persentase penurunan kekeruhan pada kondisi optimum bisa mencapai 97,227%.

Co-Authors A Angraeni Ade Febriana Syahfitri Agus Junaedi Agustian, Joni Anggraini, Devi Sagitha Bramantyo Bayu Aji D Khoirunnisa Diko Sri Agung Dwi Herianto Elida Purba Elida Purba F R Rangganita Fajar Nurjaman Heri Rustamaji Ika Kustiani Joni Agustian Joni, Agustian Kesuma, Yunita Kurniasari, Bela M. Haviz Muhammad Amin Muhammad Hanif Nurwijayanti Pia Sabrina Murtadho Rugayah Simparmin Ginting Slamet Sumardi Sudibyo Sudibyo Suharno Yayat Iman Supriyatna Yohannes Cahya Ginting Yunita Kesuma Zahratul Azizah

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