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All Journal JOURNAL OF COASTAL DEVELOPMENT Reaktor International Journal of Science and Engineering (IJSE) International Journal of Renewable Energy Development TEKNIK JURNAL TEKNOLOGI KIMIA DAN INDUSTRI IPTEK The Journal for Technology and Science Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Agrointek Bulletin of Chemical Reaction Engineering & Catalysis Seminar Nasional Teknik Kimia Kejuangan Majalah Ilmiah MOMENTUM Jurnal Aplikasi Teknologi Pangan Communications in Science and Technology Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia JURNAL PANGAN Jurnal Inovasi Teknik Kimia Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi Jurnal Profesi Insinyur Indonesia Journal of Bioresources and Environmental Sciences Bulletin of Chemical Reaction Engineering & Catalysis

M. Djaeni

Department Of Chemical Engineering ; Faculty Of Engineering; Diponegoro University Jl Prof H. Soedharto, SH, Tembalang Semarang, Indonesia Phone: +62247460058; Facs: +62247460055

Author-ID : 254621

Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Social Sciences Transportation Other

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Title

Perbaikan Proses Produksi Antosianin dari Kelopak Bunga Rosella dengan Ekstraksi Berbantuan Ultrasound Triyastuti, Meilya Suzan; Djaeni, Mohamad
TEKNIK Vol 40, No. 2 (2019): Agustus 2019
Publisher : Diponegoro University

Kelopak bunga rosella mengandung senyawa bioaktif diantaranya Antosianin. Kelopak bunga rosella mempunyai pigmen berwarna ungu yang berpotensi sebagai zat pewarna alami untuk menggantikan pewarna sintetis Violet GB. Pigmen warna ungu ini berasal dari senyawa antosianin. Namun senyawa antosianin ini mudah terdegradasi pada temperatur diatas 70Â°C, sehingga diperlukan metode ekstraksi yang tepat pada kondisi optimum. Metode yang digunakan yaitu ekstraksi dengan bantuan gelombang ultrasonik (Ultrasound Assisted Extraction) dan dioptimasi menggunakan software Design Expert. Hasil penelitian menunjukkan bahwa kondisi optimum ekstraksi pada waktu ekstraksi 15 menit, rasio sampel dan pelarut 15 gr/ml dan temperatur ekstraksi 50Â°C dengan kadar antosianin sebesar 206,996 ppm

Peningkatan Kecepatan Proses dan Mutu Minyak Bekatul melalui Proses Ekstraksi Berbantukan Ultrasonik Djaeni, Mohamad; Listyadevi, Yuniar Luthfia
TEKNIK Vol 40, No. 1 (2019): Mei 2019
Publisher : Diponegoro University

Rice bran oil is one of the oils that has been widely used in the chemical, pharmaceutical and food industries considering the high essential content such as antioxidants, vitamins that are good for the body. Extraction of ultrasonic assisted bran oil is one of many method used to reduce extraction time. The purpose of this study was to examine the effect of extraction methods on mass transfer of bran oil, antioxidant quality, and the quality of bran oil during the extraction process at the temperature, extraction time, and the right solvent ratio. Mass transfer of bran oil was evaluated based on the effect of various temperatures, extraction times, and solvent ratios to predict the right tim e to get a lot of bran oil. Chemical quality (antioxidant content of Î±-tocopherol) and physical quality (oil color) of bran oil were studied so that they were able to predict temperature, extraction time, and relatively good solvent ratio. The results showed that yield increased with increasing temperature and extraction time. However the antioxidant value of Î±-tocopherol will decrease with increasing temperature, extraction time and solvent. The recommended operating conditions for obtaining yields and antioxidant values at 40ÂºC, material to solvent ratio 1: 5 and extraction time for 51 minutes.

PENINGKATAN KECEPATAN PROSES PENGERINGAN KARAGINAN MENGGUNAKAN PENGERING ADSORPSI DENGAN ZEOLIT Djaeni, Mohamad
TEKNIK Volume 33, Nomor 1, Tahun 2012
Publisher : Diponegoro University

Drying carrageenan product still deals with low product quality and energy efficiency. The drying with airdehumidified by activated natural zeolite has a potential for drying the product. In this concept, air as dryingmedium was contacted with zeolite to reduce its relative humidity. Hence, the driving force of drying increasesand the process can be conducted at moderate temperature (40-60oC) to retain the quality. This research looksinto the effectiveness of adsorption dryer with zeolite for drying carrageenan. The natural zeolite is activated byheating 300-400oC for 2-3 hours. The zeolite is then used to dehumidify the ambient air as drying medium. Inthis work, the effect of drying temperature and carrageenan thickness on water content in carrageenan duringthe drying were studied. Results showed with air velocity 3.0 m/sec, thickness of carrageenan 1-2 mm,operational drying time 3 hours and air temperature 40-60oC, water content in carrageenan can be reducedfrom 82.0% to 25%. This result is very promising for industrial application.

Pemodelan Pupuk Rilis Lambat Dengan Fly Ash sebagai Matriks Inert yang Dilapisi oleh Ethylcellulose Djaeni, Mohamad; Maulana, Kemal
TEKNIK Vol 41, No. 1 (2020): May 2020
Publisher : Diponegoro University

Pupuk lambat rilis memiliki peranan yang penting dalam mencegah hilangnya nutrisi tanaman serta meningkatkan efisiensi penyerapan. Penelitian ini bertujuan untuk memperoleh nilai koefisien difusivitas ethylcellulose melalui perbandingan antara laju rilis pellet urea eksperimen dengan laju rilis pellet urea simulasi. Penelitian ini menggunakan metode elemen hingga 2D dengan software Comsol Multiphysics. Melalui perbandingan menggunakan hasil eksperimen dengan simulasi diperoleh hasil difusivitas pada lapisan ethylcellulose bervariasi antara 6 x 10-3 - 9 x 10-3 cm2/hari dengan Root Mean Square Error (RSME) sebagai indikator error perhitungan memiliki nilai antara 0.675 - 1.791. Hasil tersebut menunjukkan bahwa model cukup baik untuk menggambarkan karakteristik difusi urea dari matriks ke air.

Co-Authors . Widayat A. Agusniar A. Mahayana A. Nurhasanah A. Prasetyaningrum1 A. Sutanto Affian Widjanarko Affian Widjanarko Aga Aulia Rahman Ahdayani Rosarrah Ahmad M. Fuadi Ainiyyah Fatin Ajeng Yulianti Dwi Lestari Aji Prasetyaningrum Andri Cahyo Kumoro Annisa, Arianti Nuur Aprilina Purbasari Azafilmi Hakiim Berkah Fajar Tamtomo kiono Bery Kristanti Cindi Yasintasia Cynthia Anggi Maulina D. Setyani Dessy Agustina Sari Dewi Ayuningtyas Djoko Mulyono Febiani Dwi Utari Febiani Dwi Utari Febiani Utari Galih Satrio Lelono H Hadiyanto Hadiono Soegeng Rahardjo Hargono . Hargono Hargono Hargono Hargono Hargono Hargono Hartono, Damin Harum Nissaulfasha Ismi Ari Fitria Jefri Chandra Runanda Jumali Jumali Kristin Valentina Sinabutar Laeli Kurniasari Lisna Krisan Wibowo Listyadevi, Yuniar Luthfia Luqman Buchori M. Ikhwan Shofarudin Maharani Ratridewi Maulana, Kemal Meilya Suzan Triyastuti, Meilya Suzan N. Asiah Nita Ariani Novita, Dewi Ayu Nurul Aishah Aishah Nurul Asiah Nurul Asiah Prakoso, Satrio Budi R Ridwan R. Ridwan Rahmat Hidayat Raka Dimas Saputra Ratnawati Ratnawati Rohmat Figiarto S Suherman Sari, Anisa Rachma Setia Budi Sasongko Sheila Luvi Galvani Siqhny, Zulhaq Dahri Suci Dhiya Mayra Suherman Sumirat Sumirat Tri Nugroho Uma Fadzilia Arifin Uma Fadzilia Arifin, Uma Fadzilia Utari, Febiani Utari, Febiani Dwi Vera Pangni Fahriani Verona Amelia Vita Efelina Wiratno Wiratno

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