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All Journal Jurnal Bestari Reaktor International Journal of Science and Engineering (IJSE) International Journal of Renewable Energy Development TEKNIK MEDIA KOMUNIKASI TEKNIK SIPIL METANA JURNAL KIMIA SAINS DAN APLIKASI Jurnal Ilmu Lingkungan JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Jurnal Bahan Alam Terbarukan Waste Technology Eksergi: Chemical Engineering Journal Techno: Jurnal Penelitian Bulletin of Chemical Reaction Engineering & Catalysis Journal of Engineering and Technological Sciences Majalah Ilmiah MOMENTUM ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika International Journal of Artificial Intelligence Research Jurnal Ekonomi dan Bisnis Indonesian Journal of Chemistry Jurnal Aplikasi Teknologi Pangan Indonesia Journal of Halal PRoMEDIA Journal of Innovation in Business and Economics Andalas obstetrics and gynecology journal ASEAN Journal of Chemical Engineering Budimas : Jurnal Pengabdian Masyarakat Jurnal Teknik Kimia Indonesia Jurnal Pengabdian dan Peningkatan Mutu Masyarakat (JANAYU) Jurnal Ilmu Sosial Indonesia (JISI) Jurnal Energi Baru dan Terbarukan Journal of Bioresources and Environmental Sciences Jurnal Riptek Eduvest - Journal of Universal Studies Jurnal Profesi Insinyur Indonesia Journal of Bioresources and Environmental Sciences International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis JURNAL REKAYASA KIMIA & LINGKUNGAN

. Widayat

Chemical Engineering Department, Faculty Of Engineering, Diponegoro University, Jl. Prof. Soedarto, SH, Tembalang, Semarang 50275

Author-ID : 415198

Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Neuroscience Nursing Physics Public Health Social Sciences Transportation Other

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PROSES PENGOLAHAN LIMBAH INDUSTRI KELAPA SAWIT DENGAN MIKROALGA LIAR Satriadi, Hantoro; ., Widayat; ., Hadiyanto; Irzandi, Uray; Yonas, Riky
Prosiding SNST Fakultas Teknik Vol 1, No 1 (2012): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 3 2012
Publisher : Prosiding SNST Fakultas Teknik

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Industri kelapa sawit menghasilkan limbah cair yang dikenal palm oil mill effluent (POME). POME memiliki kandungan BOD sebesar 230 mg/L dan COD sekitar 700 mg/L sehingga tidak dapat dibuang langsung ke lingkungan. Pengolahan yang umum dilakukan adalah pengolahan fisika dan biologi. Penelitian ini bertujuan untuk mempelajari proses pengolahan POME dengan menggunakan mikroalga liar, dimana dipelajari konsentrasi urea (N) dan ammonium bikarbonat (C). Respon yang diamati adalah konsentrasi biomassa sebagai optical density setiap harinya sampai diperoleh nilai konstan. Prosedur analisis dengan alat spektrofotometri. Limbah setelah operasi dianalisis nilai COD dan BOD Prosedur percobaan yang dilakukan berupa pencampuran POME dan mikroalga kedalam bioreaktor sesuai perbandingan yang ditentukan. Hasil penelitian menunjukkan bahwa mikroalaga liar yang diperoleh di Jurusan Teknik Kimia FT UNDIP mampu mengolah POME, dimana pengaruh pemberian nutrient C dan N terhadap COD dan BOD, bahwa semakin tinggi penambahan unsur C dan N semakin besar penurunan nilai COD dan BODnya. Kondisi optimum untuk pengolahan limbah industri kelapa sawit dengan teknologi mikroalga pada media perbandingan 1 volume mikroalga berbanding 3 volume POME dengan nutrient 40 ppm urea dan 120 ppm NaHCO3. Kata kunci: POME, Mikroalga liar, BOD, COD, optical density

SIMULASI KINETIKA REAKSI TRANSESTERIFIKASI MINYAK GORENG BEKAS BERBANTUKAN RADIASI ULTRASONIK Aulia, Haris Nuâ€™man; ., Widayat; Budi Sasongko, Setia
Prosiding SNST Fakultas Teknik Vol 1, No 1 (2012): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 3 2012
Publisher : Prosiding SNST Fakultas Teknik

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Abstrak Biodiesel adalah bahan bakar terbaharui, biodegradable, tak beracun dibuat dari minyak atau lemak melalui transesterifikasi dengan alkohol. Pembuatan biodiesel umumnya memerlukan waktu yang lama, dimana dapat diatasi dengan proses berbantukan gelombang ultrasonik. Adapun untuk keperluan perancangan reaktor data kinetika dibutuhkan. Data-data kinetika yang ada masih terbatas pada proses konvensional. Penelitian ini bertujuan mempelajari model kinetika reaksi transesterifikasi minyak goreng bekas berbantukan radiasi ultrasonik. Penelitian drylab (simulasi dengan menggunakan perangkat lunak berbasis matriks) dilakukan dengan mengambil data sekunder dari penelitian Hingu, et al(2010). Pada penelitian tersebut radiasi ultrasonik dilakukan dengan frekuensi rendah (20 kHz) dengan parameter variasi temperatur, dan daya ultrasonik. Model kinetika reaksi yang digunakan adalah penurunan dari reaksi reversible transesterifikasi orde 4. Hasil validasi menunjukkan bahwa model kinetika reaksi yang digunakan dapat menggambarkan kondisi yang sebenarnya dari proses transesterifikasi berbantukan radiasi ultrasonik dimana nilai coefficient determination R2 > 0,9. Adapun model kinetikanya adalah sebagai berikut : Dalam persamaan tersebut rA,P,R,T,CAo,X,XAe dan M secara berurutan adalah kecepatan reaksi transesterifikasi, daya ultrasonik, konstanta gas ideal, suhu, konsentrasi awal bahan baku, konversi tiap waktu, konversi saat setimbang dan perbandingan molar metanol. Kata kunci: simulasi kinetika, transesterifikasi ultrasonik

Kinetic Study on Ultrasound Assisted Biodiesel Production from Waste Cooking Oil Widayat, Widayat; Hadiyanto, H; Sasongko, Setia Budi
Journal of Engineering and Technological Sciences Vol 47, No 4 (2015)
Publisher : ITB Journal Publisher, LPPM ITB

The objective of this research was to studyÂ a kinetic model of biodiesel production from waste cooking oil assisted by ultrasound power. The model considered the biodiesel production process as a 2nd order reversible reaction, while its kinetic parameters were estimated using MATLAB, based on data extracted from Hingu, et al. [1]. The data represented experiments under low-frequency ultrasonic wave (20 kHz) and variations of temperature, power, catalyst concentration, and alcohol-oil molar ratio. Statistical analysis showed that the proposed model fits well to the experimental data with a determination coefficient (R2) higher than 0.9.

STARCH PRODUCTION FROM RED GINGER (Zinggiber officinale Rosc.) Widayat, Widayat; Striadi, H.; Syaiful, Syaiful; Kurnia, Atik; Driastuti, Faradilla
Jurnal Bahan Alam Terbarukan Vol 7, No 1 (2018): June 2018 [Nationally Accredited]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v7i1.11417

Red Ginger is a natural ingredient including to spice that contain starch 40-60 % weight. Application of red ginger usually it is taken its extract or to taste of traditional food.Ã‚Â The purpose of this research is to know the influence of settling time, the red ginger and solvent ratio, and the temperature of the solvent in the production process of red ginger starch. We hope to get the best condition to get the highest starch yield. The process of making red ginger starch begins with peeled, then washed, shredded, filtered and precipitated. Starch ginger dried by the sun's heat. The best result was obtained at 1 hour sedimentation time with red ginger starch yield 13,3%, red ginger and water ratio 3: 5 (g / g) with yield of red ginger 15,69% and temperature of solvent at 25 Ã¡Âµâ€™C with yield of red ginger starch 11.17%.

PENENTU PERILAKU BERINVESTASI Widayat, Widayat
Journal of Innovation in Business and Economics Vol 1, No 02 (2010)
Publisher : Faculty of Economics and Business, University of Muhammadiyah Malang

Modern Financial theory based on assumption that individual investment decision is rationaly. Occurance anomalies indicate that investment choice is not always rational. Irrationality in the field of investment tend to develop the theory of behavior investment. The theory of finance behavior catalyzed by sociology, psychology and also finance. According to this theory, economics decision and investment decision as a integrated behavior, affected by many antecendence variables. Financial literacy, socio demography aspect, attitude toward risk are influence investment behavior. Besides external factor for example economics condition also affecting behavior of investment.

REPOSISI BUDAYA DALAM MEWUJUDKAN SUSTAINABILITAS PEMBANGUNAN EKONOMI BANGSA Widayat, Widayat
Jurnal Bestari No 42 (2009)
Publisher : Jurnal Bestari

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Culture as a unique characteristic of a nation has capital function in creating sustainability of economic development. In the culture, capital function can be seen from two aspects; as an instrument and constituent. Furthermore, culture contains physical (tangible) and non-physical (intangible) aspects that are useful in building nation's competitive and advantageous competence, as well as a source of national income.

POTENSI GLISEROL DALAM PEMBUATAN TURUNAN GLISEROL MELALUI PROSES ESTERIFIKASI Prasetyo, Ari Eko; Widhi, Anggra; Widayat, W
Jurnal Ilmu Lingkungan Vol 10, No 1 (2012): April 2012
Publisher : School of Postgraduate Studies, Diponegoro Univer

ABSTRAK Gliserol dapat diproduksi dalam proses produksi biodiesel sebagai hasil samping dari reaksi transesterifikasi. Gliserol berpotensi sebagai bahan baku dan dikonversi menjadi produk yang berpotensi lebih.Banyak penelitian yang telah dilakukan untuk memperoleh turunan gliserol. Di dalam proses ini ini digunakan reaksi esterifikasi, yang merupakan reaksi antara asam karboksilat dengan alcohol. Gliserol merupakan senyawa alcohol dengan gugus hidroksil berjumlah tiga gugus. Produk-produk yang dapat diproduksi meliputi gliserol trihepanoat, gliserol monostearat, lesithin, Tri Tetra Butil gliserol, Mono Gliserida oleat, gliserol triasetat /triasetin, gliserol tri bensoat /tribensoitdan resin ester gliserol maleat. Secara umum produk-produk ini digunakan di industri kosmetik, makanan, kertas, tinta, plastic, aditif bahan bakar biodiesel dan banyak lagi. Kata Kunci: produk samping biodiesel, turunan gliserol, ester gliserol, esterifikasi, konversi gliserol ABSTRACT Glycerol can be produced in biodiesel production as by product. Glycerol has potential as raw material and convert to potential value products. Various research that have been done to get glycerol derivatives. In this process used esterification reactio that reaction alcohol with carbocilic acid. Glycerol is a alcohol with three hydroxyl funtiona . The products have been produced from this process including Triheptanoate glycerol, glycerol monostearate, lecithin, glycerol Tri-Tetra Butyl, Mono Glyceride Oleic, Tri Acetyl glycerol / triacetin, Gryceril Tri Benzoic / Tribenzoin, Glycerol ester maleic resin. In general, these derivatives are used in the cosmetics industry, food, paper, ink, plastic, biodiesel additive materials and much more. Keywords: by product of biodiesel, glycerol derivatives, glycerol ester, esterification, conversion of glycerol

RANCANG BANGUN DAN UJI ALAT PROSES PENINGKATAN MINYAK CENGKEH PADA KLASTER MINYAK ATSIRI KABUPATEN BATANG Widayat, W; Cahyono, Bambang; Ngadiwiyana, N
Jurnal Ilmu Lingkungan Vol 10, No 2 (2012): Oktober 2012
Publisher : School of Postgraduate Studies, Diponegoro Univer

ABSTRAK Minyak cengkeh merupakan salah satu produk dari minyak atsiri yang dihasilkan oleh Kluster Minyak Atsiri di Kabupaten Batang. Permasalahan yang dihadapi saat ini adalah kadar eugenol yang rendah serta warna yang belum bisa memenuhi standar SII/EOA maupun SNI 06 2387 2006. Penelitian ini bertujuan untuk melakukan peningkatan kualitas minyak cengkeh /eugenol dengan proses adsorpsi. Hasil penelitian menujukkan bahwa: bahan minyak cengkeh belum memenuhi standar SNI 06 2387 2006 khususnya dari warna dan kadar eugenol total. Hal ini dikarenakan dalam proses masih digunakan peralatan dari besi. Minyak cengkeh dapat ditingkatkan kadar eugenol dan perbaikan warna menjadi lebih cerah (kuning) dengan penambahan asam sitrat 0,6-10%. Peralatan dengan pengadukan dapat digunakan dalam proses peningkatan minyak cengkeh. Daya yang terpasang sekitar 1 PK dan kapasitas setiap batch 20-30 kg dengan waktu operasi 60 menit dan temperatur 50oC. Kemampuan UKM di Klaster Minyak Atsiri Kab Batang Jawa Tengah dapat ditingkatkan dengan kegiatan pelatihan dan Expo hasil penelitian. Pada Tahun pertama, UKM telah melakukan kegiatan analisis produk dan perbaikan minyak cengkeh sehingga memenuhi standar SNI 06 2387 2006. Kata Kunci: minyak cengkeh, eugenol, adsorpsi, tangki berpengaduk, persentase Fe terikat ABSTRACT Clove oil is a product of essential oils produced by clusters of Essential Oils in Batang. The problem faced today is that low levels of eugenol and it color doen’t meet with SII / EOA and SNI 06 2387 2006 standard. The purpose in this research for improving the quality of clove oil / eugenol with adsorption process. The results showed that: clove oil doesn’t meet of SNI 06 2387 2006 especially at colors and total eugenol. This is because the process was used equipment from iron. The eugenol and color improving to yellow bright of clove oil by adding citric acid from 0.6 to 10%. Stirring equipment can be used to the process for increasing the quality of clove oil. Installing power of about 1 PK with batch of 20-30 kg capacity with 60 minutes operating time at 50oC. The capability of UKM at clusters of Essential Oil at Batang, Central Java can be improved by training and researching Expo. In the first year, UKM had engaged in product analysis and improvement of clove oil that meets with SNI 2387 06 2006. Keywords: clove oil, eugenol, adsorption, stirred tank, the percentage of Fe bonded

Bagian Belakang Reaktor No. 17 No. 1 Maret 2017 Widayat, W
Reaktor Volume 17 No.1 Maret 2017
Publisher : Dept. of Chemical Engineering, Diponegoro University

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Daftar indeks judul, obyek dan subyek

Front Mattter Vol 18 No. 1 March 2018 Widayat, W
Reaktor Volume 18 No. 1 March 2018
Publisher : Dept. of Chemical Engineering, Diponegoro University

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Matter of Reaktor

Co-Authors A Abdullah A Abdurrakhman A. Sadikky DP Abdullah Abdullah Achmad Roesyadi Achmad Roesyadi Achmad Wildan ADE ARTA, MOCHAMAD ZAINUDIN Adi Darmawan Adit Rizky Wicaksono Afriani, Nurfika Agus Suprihanto Ahmad Juanda Ahmad Ni’matullah, Albaari Aini, Apsari Puspita Aji Baharsyah Aji Prasetyaningrum Aji, Satriyo Akbar Asfar, A.M. Iqbal Al-Baari, Ahmad N Al-Baarri, Ahmad Ni'matullah Al-Baarri, Ahmad Ni’matullah Alfareza, Muhammad Ircham Almaas Salwa, Diah Ayu Andi Friadi Andika Pradifan Andrew Bryano Kermite, Andrew Bryano Andri Cahyo Kumoro Andri Cahyo Kumoro Andrianto, Novian Andry Anggoro Arahim Anggra Widhi Anggra Widhi Anik Sarminingsih, Anik Annisa Metantya Maharani Ari Eko Prasetyo Ari Eko Prasetyo Ariadi, Ariadi Arianti Nuur Annisa Arief Budiman Aris Triwiyatno Arman, Mhd. Adithia Perdana Arwan, Berriandi Aulia, Haris Nuâ€™man B Budiyono Bacthiar, Hafni Bagus Agang Sudrajat Bakti Jos Bambang Cahyono Bambang Sudarsono Banowati, Tria Nita Berkah Fajar Tamtomo kiono Budi Warsito Budianto, Irawan Arief Catur Pramono D. Ingrid A D. Soetrisnanto Dani Puji Utomo Danny Soetrisnanto DENNY SANJAYA Devina Ingrid A. Dita Ayu Sofiati Driastuti, Faradilla Dyah Hesti Wardhani Edward, Leonardo Ela, Hulasoh Elysia, Alvina Enda Merizki br Ginting Fauzandy Husna Setyanto Favian Nafiega Ferdy D, Erbert Fistcar, Wawarisa Alnu H Hadiyanto H M Rachimoellah H Satriadi H. Anggraeni H. Hadiyanto H. Satriadi H. Satriadi Hadiyanto Hadiyanto Hadiyanto Hadiyanto Hanapi bin Mat Hanapi bin Mat Handung Nuryadi Hanifa Zakiyatul Urbach Hantoro Satriadi Hantoro Satriado Haris Nu'man Aulia Haris Nu’man Aulia Hasanah, Alfi Hendra Try Ardianto Hendro, Andika Herlambang, Andy Rahmadi Heru Susanto Hesti Rahayu I. Hartati Ika Windrianto K. Handono Indah Hartati Iqbal Mubarak Irawan Arif Budianto Johnner P Sitompul Jonfita, Bernike Vemmialia Khoirun Nisa Kurdianto Kurdianto Kurnia, Atik Kusmiyati, K Listyawijayanti, Nabilla Salma Lukman Hakim Firdaus Luqman Buchori M. Djaeni M. Hadi M. Hadi M. Hadi Makrufah Hidayah I Marcelinus Christwardana Maria Siahaan Marta Chandra Anikke Putri Masyhad Masyhad Meiny Suzery Melati, Emilla Mochamad Arief Budihardjo MSK. Tony Suryo Utomo Muchammad Muchammad Muhammad Farizan Praevia Muhammad Hilmazar Hawari Muhammad Rachimoellah Muhammad Rachimoellah Muhammad Syukri Hasan Muhammad Syukri Hasan Nasir, Yahya Ndaru Okvitarini Ngadiwiyana M.Si. S.Si. Ngurah Widiantara Ni'matuzahroh Ni'matuzahroh Novianti, Khusnul Rofida Noviyanto, Sigit Nur Rokhati Nurjannah, Rifa Nurul Yaqin Pandapotan, Boris Poltak Prakoso, Satrio Budi Prakoso, Satyo Jati Prasetyo, Ahmad Wisnu Pratomo, Shendy Eko Priyosetyoko Priyosetyoko, Priyosetyoko Puja Chrisdianto Manapa Putri, Sylvia Rahmi Rahmania, Yusi Luluk Ratnawati Ratnawati Razak, Habibie Rheza Dipo Riky Yonas Riky Yonas Riva Amrulloh Roz, Kenny S Suherman S Supriyandi Samudra, Makitta Widi Saudale, Jeanette Mutiara Paula Sekarningtyas, Nazifa Seno, Abdi Setia Budi Sasongko Setia Budi Sasongko Setiadi, Muhammad Irfan Sianturi, Aurelia Genesya Silviana Silviana Silviana, S Siti Nur Khairunisa Aroli Sonya Hakim Raharjo Sri Nastiti Andharini Sri Puji Lestari Sri Widodo Agung Suedi Sri Widodo Agung Suedy Sriatun Sriatun Striadi, H. Sugiyanto - Sulardjaka Sulardjaka Sulardjaka, S Sulastri, Cucu Sumiati Sumiati Suroso Agus Saputro Sussatrio, Hardito Syafrudin Syafrudin Syaiful . Syarief, Elijah Sylvia Rahmi Putri Tatang H. Soerawidjaja Taufiq, Akbar Teguh Purnomo, Teguh Tri Winarni Agustini Tri Winarni, Agustini Tutuk Djoko Kusworo Uray Irzandi Uray Irzandi Utama, Bobby Indra Vicky Ramadhani, Vicky widodo, anton sri Winaningsih, Ima Wira Pinem Yanuar Rifianto YS Darmanto Yudhy Dharmawan Yuliani, Kristina Wulan Yulita Arni Priastiwi Yuliyandjaja, John Philia Yusi Luluk, Rahmania

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