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All Journal Jurnal Rekayasa Proses PROSIDING SEMINAR NASIONAL Rotasi METANA Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Bulletin of Chemical Reaction Engineering & Catalysis Techno (Jurnal Fakultas Teknik, Universitas Muhammadiyah Purwokerto) Proceeding Of The International Seminar and Conference 2015 LAPORAN PENELITIAN DAN PENGABDIAN MASYARAKAT Majalah Ilmiah MOMENTUM Jurnal Ilmu Farmasi dan Farmasi Klinik (Journal of Pharmaceutical Science and Clinical Pharmacy) INDONESIAN JOURNAL OF PHARMACY Indonesian Journal of Chemistry Prosiding Seminar Nasional Darmajaya Jurnal Rekayasa Proses Abdimas UNWAHAS : Jurnal Pengabdian Masyarakat UNWAHAS Jurnal Ilmiah Cendekia Eksakta Jurnal Inovasi Teknik Kimia Journal of Vocational Studies on Applied Research Techno Research In Chemical Engineering Bulletin of Chemical Reaction Engineering & Catalysis
Indah Hartati
Universitas Wahid Hasyim Semarang
Agriculture, Biological Sciences & Forestry Automotive Engineering 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 Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Social Sciences

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Journal : Jurnal Rekayasa Proses

 1 
Produksi Asam Lemak dari Dedak Melalui Proses Hidrolisis Enzimatis Secara In Situ Indah Hartati; Fahmi Arifan; Mohammad Endy Yulianto
Jurnal Rekayasa Proses Vol 5, No 2 (2011)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.1899

Abstract

Indonesia berpotensi sebagai penghasil asam lemak dari dedak padi yang jumlahnya melimpah. Dedak padi mengandung enzim lipase yang dapat mengkatalisis proses hidrolisis trigliserida pada dedak padi menjadi asam lemak. Penelitian ini bertujuan mengkaji proses hidrolisis trigliserida pada dedak padi dengan mengaktifkan enzim lipase. Studi produktivitas dilakukan dengan mengkaji pengaruh penambahan buffer phosphat terhadap pembentukan asam lemak. Studi produktivitas dilakukan dengan membandingkan perolehan asam lemak dengan atau tanpa penggunaan buffer pada proses hidrolisis. Parameter yang diteliti meliputi: volume buffer (0–25% terhadap volume air), rasio dedak-air (1:1–1:6 b/v), dan suhu reaksi (30–50°C). Hasil penelitian menunjukkan bahwa ion-ion pada larutan buffer mampu meningkatkan aktivitas dan stabilitas lipase. Penambahan buffer mampu meningkatkan perolehan asam lemak hingga 48%. Sementara perolehan asam lemak tertinggi dicapai pada hidrolisis dengan kondisi operasi volume buffer 5%, suhu reaksi 50°C dan rasio air dedak 1:5, dengan bilangan asamnya 2,63 mgek NaOH/g dedak Kata Kunci: asam lemak, dedak padi, lipase, hidrolisis, enzimatis Indonesia has potential to produce fatty acid from rice bran which is abundantly available as a side product of rice field activities. Rice bran contains lipase enzyme which is a catalyst for hydrolysis of triglycerides largely found in rice bran. The present work aimed to investigate the hydrolysis process of triglyceride from rice bran by activated lipase enzyme. Effect of the presence of phosphate compounds as buffer on fatty acid production was studied. The amount of fatty acid produced during hydrolysis with the use of buffer was compared to that without buffer. The parameters studied in the present work were volume of buffer (0% to 25% of water volume), rice bran-water ratio (1:1 to 1:6 w/v) and reaction temperature (30°C – 50°C). Experimental results showed that ions in the buffer solution could increase the activity and stability of lipase enzyme. The addition of buffer was found to increase fatty acid yield up to 48%. The highest fatty acid results ware obtained at the operation condition at which buffer volume of 5%, reaction temperature of 50°C and rice bran-water ratio of 1:5 where the acid number was 2.63 mgek NaOH/g rice bran. Keywords: fatty acid, rice bran, lipase, hydrolysis, enzymatic
Mathematical Modelling and Simulation of Hydrotropic Delignification Indah Hartati; Wahyudi Budi Sediawan; Hary Sulistyo; Muhammad Mufti Azis; Moh Fahrurrozi
Jurnal Rekayasa Proses Vol 13, No 1 (2019)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (586.363 KB) | DOI: 10.22146/jrekpros.42364

Abstract

A B S T R A C TDelignification is a fundamental step in bio-refinery for lignocellulose feedstock processing. Hydrotropic delignification is considered as a promising alternative compared to other conventional delignification processes due to the use of mild chemicals. In this paper, a quantitative description of hydrotropic delignification for a cylindrical biomass particle is presented by using fundamental concepts of chemical kinetics and transport processes. The development of hydrotropic delignification model was based on following assumptions: i) lignin in the biomass is immobile, ii) delignification is considered as a simultaneous process which involves intra-particle diffusion of hydrotropic agent followed by second order reaction for lignin and hydrotropic chemical, as well as intra-particle product diffusion. Finite difference approximation was applied to solve the resulting partial and ordinary differential equations. The simulation results of the proposed model may describe the concentration profiles of lignin, hydrotropic agent and soluble product distributions in a cylindrical solid particle as a function of radial position and time. In addition, the model could also predict the concentration of hydrotropic agent and soluble product in the liquid phase as well as the yield and conversion as a function of time. A local sensitivity analysis method using one factor at a time (OFAT), has been applied to investigate the influence of particle size and hydrotropic agent concentration to the yield and conversion of the hydrotropic delignification model. Validation of the proposed model was conducted by comparing the numerical results with an analytical solution for a simple case diffusion in cylinder with constant surface concentration and in the absence of chemical reaction. The validation result showed that the hydrotropic delignification model was in good agreement with the analytical solution.Keywords: cylindrical particle; delignification; hydrotropic; modelling; simulation A B S T R A KDelignifikasi merupakan tahap penting dalam proses biorefineri biomassa berlignoselulosa. Delignifikasi hidrotropi adalah salah satu alternative proses yang memiliki beberapa kelebihan dibandingkan proses-proses delignifikasi konvensional karena tidak menggunakan bahan kimia berbahaya. Dalam artikel ini disajikan deskripsi kuantitatif proses delignifikasi hidrotropi untuk partikel berbentuk silinder dengan menggunakan konsep fundamental kinetika reaksi dan proses-proses perpindahan. Penyusunan model proses delignifikasi hidrotropi dilakukan berdasarkan asumsi-asumsi bahwa i) lignin pada biomassa bersifat immobile, ii) proses delignifikasi dipandang sebagai suatu rangkaian proses simultan yang terdiri atas proses difusi intrapartikel senyawa hidrotrop, reaksi order dua terhadap lignin dan senyawa hidrotrop, serta difusi intrapartikel produk delignifikasi. Finite difference approximation (FDA) digunakan untuk menyelesaikan persamaan simultan berbentuk persamaan diferensial ordiner dan persamaan diferensial parsial dalam tahap pemodelan. Hasil simulasi memberikan gambaran profil distribusi konsentrasi lignin, konsentrasi senyawa hidrotrop dan produk delignifikasi di dalam partikel padatan yang berbentuk silinder sebagai fungsi posisi dan waktu. Model yang dikembangkan juga dapat memprediksi konsentrasi senyawa hidrotropik dan produk di fasa cairan, serta yield dan konversi sebagai fungsi waktu.  Metode analisis sensitivitas lokal, yakni metode one factor at a time (OFAT), digunakan untuk mengkaji pengaruh ukuran partikel dan konsentrasi senyawa hidrotropik terhadap yield dan konversi proses delignifikasi. Validasi model yang diajukan dilakukan dengan membandingkan hasil analisa numerik dengan hasil penyelesaian analitis untuk kasus difusi pada silinder dengan konsentrasi permukaan yang konstan serta tidak melibatkan reaksi kimia. Hasil validasi model menunjukkan bahwa model delignifikasi hidrotropi yang diajukan memiliki kesesuaian yang tinggi dengan hasil penyelesaian analitis.Kata kunci: delignifikasi; hidrotropi; pemodelan; silinder; simulasi
Co-Authors . Widayat Achmad Wildan Agnes Budiarti Aisyah Hana Rifiani Anggun Titi Nurcahyati Aniq, Nur Aprilia Putri Sulistianingrum Ari Yuniastuti Arie Setya Putra Ariyani, Sinta Aryanti, Desi Rahma Azzahra Aulia Hanifa Azzahra Aulia Hanifah Bayu Prasetyo Aji Bella Paramaeshela Chandra Pribadi Darmanto Darmanto Darmanto Darmanto Dea Ayu Ade Arisma Dea Syifa Fitriani Deddy Kurniawan Wikanta Devi Endah P. Devina Ingrid A. Devita Hardianti Dewi Susanti Dewi Susanti Dian Risdianto Dita Desti D_Khilyati Diyono Ikhsan Dwi Handayani Dwi Kurnia Indar Dyah Puspa Arum Dyah Yuliana Zulfa Efa Firmania Eflita Yohana Endah Lestari Endah Subekti Ernawati Budi Astuti Fahmi Arifan Farikha Maharani Farizki, Bangkit Februana Hutavia Purba Caraka Fifi Kurniasari Habib Abdun Nafik Hamid Aqil Hamid Aqil Hani Haswati Hardiyanti Amalia Harianingsih, Harianingsih Hary Sulistyo Hary Sulistyo Hary Sulistyo Hasan, Hasan Haswati, Hani Helmy Purwanto Hidayatun Natijah Indro Sumantri Ismi Yatun Ismiyatul Kholisoh Ismiyatul Kholisoh Ismiyatul Kholisoh Julianto, Mohamad Endy Khornia Dwi Lestari Lailatul Firdaus Laeli Kurniasari Laeli Kurniasari Laeli Kurniasari Laeli Kurniasari Laeli Kurniasari Laeli Kurniasari Lailatul Fitriyah Maharani Kusumaningrum Mauludin, Mochamad Subchan Milzam, Muhammad Mira Nurhayani Mochamad Arif Budihardjo Moh Fahrurrozi Moh Fahrurrozi Mohamad Endy Y Yulianto Mohammad Endi Yulianto Mr. Darmanto Muhammad Mufti Azis Mustagfirin Mustagfirin Mustaghfirin Mustaghfirin Nafik, Habib Abdun Nazaruddin Sinaga Nugroho Widiasmadi Nur Aniq Pradipta Risma Rukma Ardi Putri Prihastuti R.TD Wisnu Broto Renan Subantoro Renan Subantoro Reviana Inda Dwi Suyatno Rita Ade Lasria Pardede Rita Dwi Ratnani Safaah Nurfaizin Salsa Erna Setiawati Sarmi Sarmi Sekar Apriana Sinta Ariyani Siti Sudarmiseh Sofa Rohmania Sufrotun Khasanah Sufrotun Khasanah Supriyadi Supriyadi Sury Widiyanti Suwardiyono Suwardiyono Suwardiyono Suwardiyono Suwarno Suwarno Tabah Priangkoso Tandang Patria Tama Tisa Lazuardy Titis Puspitasari Titis Puspitasari Udin Bahrudin Vita Paramita Vita Paramita Vita Paramita Wahyudi Budi Sediawan Wahyudi Budi Sediawan Wahyudi Budi Sediawan Widarti Widarti Yance Anas Zahroh El Baidho Zakiyyatut Darojah Zakka Athoo’ Illah Zulfa, Dyah Yuliana