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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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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 : Department of Chemical Engineering - Diponegoro University

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

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%.

Pengolahan Limbah Cair Laundry menggunakan Ekstrak Biji Kelor sebagai Biokoagulan Hermida, Lilis; Agustian, Joni; Azizah, Zahratul
Jurnal Teknologi dan Inovasi Industri (JTII) Vol 4, No 1 (2023)
Publisher : Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtii.v4i1.62

Hasil limbah cair laudry biasanya langsung dibuang ke badan air yang semakin lama akan menyebabkan pencemaran lingkungan karena tidak diolah terlebih dahulu. Pada penelitian ini dilakukan pengolahan limbah cair laundry dengan menggunakan biokoagulan ekstrak biji kelor. Biokoagulan ekstrak biji kelor diperoleh dengan cara mengekstraksi biji kelor menggunakan larutan NaCl 1 M. Pengolahan limbah cair laundry dilakukan secara batch dengan cara mencampurkan 80 ml/L ekstrak biji kelor ke dalam 100 ml limbah cair laundry yang telah diatur pH nya menjadi 6-10. Analisa turbidity, COD dan fosfat pada limbah cair laundry dilakukan sebelum dan sesudah pengolahan. Dari hasil penelitian diperoleh bahwa ini menunjukan bahwa efisiensi penyisihan kekeruhan, COD, dan Fosfat efektif dilakukan. Dengan kondisi pH optimum pada pH 6 yang menurunkan kekeruhan menjadi 15,5 NTU dengan persentase penyisihan hingga 97,22% dan COD hingga 65,05%. Sedangkan penurunan fosfat yang paling besar terjadi pada pH 8 dengan persentase penyisihan sebesar 95,48% hingga kadar fosfat menjadi 0,038 mg/L.

Penggunaan Ekstrak Biji Kelor sebagai Biokoagulan pada Pengolahan Limbah Cair Laundry Hermida, Lilis; Agustian, Joni; Kurniasari, Bela
Jurnal Teknologi dan Inovasi Industri (JTII) Vol 2, No 2 (2021)
Publisher : Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtii.v2i2.35

Limbah cair laundry seringkali dibuang ke badan air tanpa diolah terlebih dahulu sehingga semakin lama dapat mencemari lingkungan. Pada penelitian ini dilakukan pengolahan limbah cair laundry dengan menggunakan biokoagulan ekstrak biji kelor. Biokoagulan ekstrak biji kelor diperoleh dengan cara mengekstraksi biji kelor menggunakan larutan NaCl 1 M. Pengolahan limbah cair laundry dilakukan secara batch dengan cara mencampurkan berbagai dosis (20-160 ml/L) ekstrak biji kelor ke dalam 100 ml limbah cair laundry . Analisa pH, turbidity, COD dan fosfat pada limbah cair laundry dilakukan sebelum dan sesudah pengolahan. Dari hasil penelitian diperoleh bahwa semakin tinggi dosis biokoagulan semakin rendah pH limbah cair laundry . Turbidity menurun dari 561 NTU hingga 56 NTU apabila dosis ditingkatkan dari 20 hingga 80 ml/L, tetapi apabila dosis ditingkatkan lagi angka turbidity menjadi naik. Semakin tinggi dosis koagulan semakin rendah angka COD. Kandungan fosfat menurun dari 1,724 mg/L ke 0,836 mg/L apabila dosis biokoagulan dinaikan dari 20 hingga 40 ml/L, tetapi kandungan fosfat meningkat apabila dosis biokoagulan ditingkatkan lebih lanjut.

Pengolahan Limbah Cair Laundry Melalui Proses Elektrokoagulasi Sistem Batch Recycle Menggunakan Elektroda Aluminium yang disusun Secara Bipolar Hermida, Lilis; Agustian, Joni; Anggraini, Devi Sagitha
Jurnal Teknologi dan Inovasi Industri (JTII) Vol 5, No 2 (2024)
Publisher : Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtii.v5i2.101

Penelitian elektrokoagulasi limbah cair laundry dilakukan di reaktor yang beroperasi secara batch recycle, yang menggunakan 6 (enam) elektroda yang berupa alumunium dalam susunan bipolar. Pengaruh variasi parameter operasi (besarnya tegangan listrik dan kondisi pH limbah laundry) terhadap persentase penurunan kekeruhan, COD, dan Fosfat pada air limbah yang diamati. Kemudian kondisi operasi yang optimal di investigasi menggunakan rancangan percobaan fractional factorial taguchi. Berdasarkan hasil percobaan dapat disimpulkan bahwa tegangan listrik sangat mempengaruhi persentase penurunan kekeruhan, COD, dan Fosfat pada limbah cair laundry. Begitu juga dengan pengaturan pH limbah sebesar 4, 6, dan 8. Kondisi optimum diperoleh pada tegangan listrik 13,8 volt, jarak antar elektroda 0,5 cm, dan dengan pH 4, laju alir 800 l/jam dan waktu pengolahan 2 jam. Persentase penurunan kekeruhan pada kondisi optimum bisa mencapai 93,53%, persentase penurunan COD mencapai 75%, sedangkan untuk persentase penurunan fosfat mencapai 95,06%.

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