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All Journal Reaktor International Journal of Science and Engineering (IJSE) International Journal of Renewable Energy Development TEKNIK METANA Jurnal Ilmu Lingkungan JURNAL TEKNOLOGI KIMIA DAN INDUSTRI IPTEK The Journal for Technology and Science Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Seminar Nasional Teknik Kimia Kejuangan Journal of Engineering and Technological Sciences Majalah Ilmiah MOMENTUM Science and Technology Indonesia Indonesia Journal of Halal Abdimas UNWAHAS : Jurnal Pengabdian Masyarakat UNWAHAS Jurnal Profesi Insinyur Indonesia Bulletin of Chemical Reaction Engineering & Catalysis
Luqman Buchori
Departemen Teknik Kimia, Fakultas Teknik, Universitas Diponegoro Jl Prof Sudharto, SH, Tembalang, Semarang, 50275, Telp/fax: (024)7460058
Religion Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology 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 Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Physics Social Sciences Transportation

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PENGARUH PENAMBAHAN ZEOLIT 3A TERHADAP LAMA WAKTU PENGERINGAN GABAH PADA FLUIDIZED BED DRYER Maria Augustine Graciafernandy; . Ratnawati; Luqman Buchori
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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Abstract

Kandungan air yang tinggi (lebih dari 14%) dalam gabah dapat menyebabkan penurunan kualitas beras. Gabah panen umumnya mempunyai kandungan air sekitar 21-26 %. Gabah ini harus segera dikeringkan setelah pemanenan. Sistem pengeringan tradisional yang sering diterapkan oleh para petani di Indonesia mempunyai kendala antara lain ketergantungan terhadap cuaca, waktu pengeringan yang lama, kualitas produk yang tidak seragam serta mudahnya kontaminasi benda asing. Kajian mengenai sistem pengeringan pada suhu rendah dan waktu yang singkat perlu dilakukan dalam upaya peningkatan kualitas gabah. Diperkenalkan sistem pengeringan gabah dengan sistem adsorbsi oleh zeolit 3A pada fluidized bed dryer. Secara garis besar gabah panen akan dikeringkan dalam suatu unggun terfluidisasi pada suhu 40 0C, flowrate 3 m/s dengan komposisi perbandingan zeolit:gabah berturut-turut adalah sebagai berikut 0:100; 20:80; 40:60 dan 60:40 (% w). Pengamatan dilakukan terhadap penurunan kadar air serta waktu pengeringan. Pengeringan akan dihentikan ketika kadar air dalam gabah mencapai sekitar 14%. Dari penelitian ini didapatkan hasil bahwa waktu pengeringan tersingkat pada kompisi zeolit:gabah = 60:40 yakni selama 17,40 menit. Pengeringan ini menghemat hingga 22,77 menit dibandingkan pengeringan tanpa zeolit.Kata kunci: pengeringan gabah, zeolit 3A, fluidized bed dryer.
APLIKASI UNIT PENGOLAH AIR DENGAN TEKNOLOGI MEMBRAN DI UKM ELEKTROPLATING. Luqman Buchori; Faleh Setia Budi; Heru Susanto
JURNAL ILMIAH MOMENTUM Vol 6, No 2 (2010)
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v6i2.112

Abstract

Electroplating industry is characterized in the metal plating process. This process occurs in the electroplating bath that contains a chemical solution. Before the coating process, the metal material to be coated should be washed first to remove the impurity attached. The metal materials that have been completely coated are then took from the bath and rinsed with water to clean the chemical solution attached at those materials. UD Citra Utama obtaines the water used for cleaning from the well in industry area around the company. Unfortunatley, the water well used is characterized by its relatively high salt content and turbid. Initial water analysis showed that those parameters are beyond the standard of water quality used for cleaning in electroplating industry. The use of this water has negative impact such as decreasing thw water quality, slows down the speed of coating process and eventually decreases the capacity and company income. To solve this problem, we have developed water treatment unit that treats the well water into pure water. The unit contains reverse osmosis (RO) membrane, pump, catridge prefilter and media filter. In addition, the unit is equipped with the accessories such as pressure gauge, flow meter and feed/product tank. The results of evaluation showed that water treatment unit can increase the product capacity 30% from 30 m2 to 39 m2 that correspond to income from Rp. 2000000,- to Rp 2600000,-. In addition, this unit can decrease the company omset from 5% to 0.5%. The water produced from this unit could meet the government role (Peraturan Menteri Kesehatan RI Nomor : 416/MENKES/IX/1990). Keywords : electroplating; water treatment unit; pure water
OPTIMASI PROSES POLIMERISASI CNSL DENGAN FORMALDEHID UNTUK APLIKASI COATING FURNITURE Faleh Setia Budi; Luqman Buchori
JURNAL ILMIAH MOMENTUM Vol 9, No 1 (2013)
Publisher : Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36499/jim.v9i1.849

Abstract

Produksi jambu mete Indonesia mengalami peningkatan sebesar 6,2% dari tahun 1999 sampai 2003. Selain menghasilkan produk utama kacang mete yang bernilai ekonomi tinggi proses pemecahan biji mete juga menghasilkan limbah kulit biji yang belum dimanfaatkan secara optimal. Kulit biji mete mengandung minyak (Cashew Nut Shell Liquid/CNSL) sekitar 32-36%. Minyak ini mengandung senyawa phenol sehingga dapat dimanfaatkan sebagai sumber phenol alami dalam pembuatan resin phenol formaldehid, menggantikan phenol yang berasal dari minyak bumi yang cadangannya semakin menipis. Penelitian yang dilakukan bertujuan untuk mengetahui pengaruh variabel perbandingan reaktan dan suhu operasi terhadap resin yang dihasilkan dan mencari kondisi optimum reaksi polimerisasi phenol formaldehid dari CNSL serta kualitas coating yang dihasilkan. Pada proses reaksi phenol formaldehid variabel yang dipilih sebagai variabel berubah adalah  rasio Formaldehid/CNSL atau F/C (0.5, 0.75 dan 1) dan suhu operasi (70, 80 dan 80oC). Sedangkan lainnya merupakan variabel tetap yang meliputi volume 250 ml, katalis HCl(p)= 4 ml, kecepatan pengadukan 200 rpm, waktu operasi 90 menit, pH = 2 dan tekanan operasi 1 atm. Parameter yang diamati adalah kadar formaldehid bebas. Metode yang digunakan untuk merancang dan mengolah data hasil percobaan adalah RSM (Respon Surface Methodology). Variabel yang paling berpengaruh adalah rasio F/C dan kondisi optimum didapatkan pada rentang rasio F/C=0,65-0,85 dan rentang suhu 75-85oC dengan konversi 0,55. Kualitas resin terbaik untuk aplikasi coating diperoleh pada perbandingan reaktan F/C=0,75/1. Kata kunci : CNSL,  phenol formaldehid, coating
REAKSI METANOLISIS LIMBAH MINYAK IKAN MENJADI METIL ESTER SEBAGAI BAHAN BAKAR BIODIESEL DENGAN MENGGUNAKAN KATALIS NaOH Dewi Fatmawati; Putri Diliyan Shakti; Luqman Buchori
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 2, Nomor 2, Tahun 2013
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro,

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Abstract

Biodiesel merupakan bahan bakar alternatif yang produksinya dapat diperbaharui. Biodisel diperoleh dari minyak tumbuhan, lemak binatang atau minyak bekas melalui esterifikasi dengan alkohol. Biodiesel dapat digunakan tanpa modifikasi ulang mesin diesel. Minyak ikan dapat dimanfaatkan sebagai biodiesel karena mengandung asam lemak bebas. Peningkatan asam lemak bebas secara cepat terjadi karena adanya enzim lipase aktif pada saat proses pembuatan minyak ikan menjadi biodsel sehingga dapat dikonversi menjadi metil ester dengan proses esterifikasi. Esterifikasi adalah reaksi asam lemak bebas dengan alkohol membentuk ester dan air. Tujuan dari penelitian ini adalah untuk menghasilkan biodiesel dari limbah ikan dengan pengolahan limbah secara fisik, kimiawi, dan biologis, menentukan waktu reaksi optimum esterifikasi, serta menentukan banyaknya soda kaustik (NaOH) yang dibutuhkan agar didapatkan pemisahan antara gliserin dan metil ester yang optimum. Variabel tetap yang digunakan terdiri dari : berat minyak ikan 50 ml, waktu pemasakan 120 menit, perbandingan kadar minyak: metanol (1:6), % berat katalis, sedangkan variabel berubahnya terdiri dari : NaOH , dan waktu esterifikasi, variasi NaOH yang dipakai dalam penelitian ini adalah  3,5gr, 4,5gr, 5,5gr , dan  6,5gr dan variasi untuk waktu esterifikasinya adalah  30, 45, 60, dan 75 menit. Dapat disimpulkan bahwa pada waktu 75 menit,  perbandingan minyak :methanol = 1:6 dan dengan penambahan NaOH 3,5 gram memberikan konversi maksimal yaitu 80,59%.
PENGARUH KATALIS ASAM (H2SO4) DAN SUHU REAKSI DALAM PEMBUATAN BIODIESEL DARI LIMBAH MINYAK IKAN Boby Gusman Irianto Samosir; Fradriyan Aulia; Luqman Buchori
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 1, Nomor 1, Tahun 2012
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro,

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Abstract

Biodesel is a fuel that consists of a mixture of monoalkyl esters of long fatty acid used as an alternative for. The purpose of this study was to produce biodiesel using fish waste as raw materials and the influence of the acid catalyst and reaction temperature on biodiesel specifications. For fixed variables consist of: weight of fish oil, cooking time, comparison of oil content of methanol, catalyst wt%, while variable changes consist of: the amount of acid catalyst, and reaction temperature. Variation of catalyst used in this study were 1 ml, 2 ml, 3 ml, and 4 ml, while the variation for the reaction temperature is 50oC, 60oC, 70oC and 80oC. In this study consists of two stages. The first stage is making biodesel which consists of: preparation and analysis of fish oils, esterification and transesterification of triglycerides and glycerol separation. In the second phase is to analyze the physical properties biodesel result of transesterification The results obtained that the change in temperature and amount of catalyst H2SO4 affect the yield value, viscosity, density and refractive index of biodiesel. The changes affect the amount of catalyst H2SO4 calorific value of biodiesel. In the process of making biodiesel from fish oil obtained results close to Test for specific gravity, viscosity and refractive index is a variation of temperature (70oC, 80oC; amount of catalyst H2SO4 1 ml, 2 ml, 3 ml, 4 ml) and variations in temperature (60oC amount of catalyst 3 ml, 4 ml). The calorific value of biodiesel from fish oil every variation of catalyst amount is far below the heating value of SNI, which is between 5190 - 5575 kcal / kg.
PEMBUATAN BIOETANOL HASIL HIDROLISA BONGGOL PISANG DENGAN FERMENTASI MENGGUNAKAN SACCAROMYCESS CEREVICEAE Nurjati Solikhin; Arum Sakti Prasetyo; Luqman Buchori
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 1, Nomor 1, Tahun 2012
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro,

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Abstract

Ethanol (C2H5OH) is the liquid from the fermentation of sugars from carbohydrate sources using the help of microorganisms. Bioethanol can also be interpreted as a chemical that is produced from foodstuffs containing starch, such as cassava, sweet potato, corn, and sago.This study was conducted to obtain bioethanol from banana weevil in acid hydrolysis of microbial fermentation and using Saccaromyces cereviceae. In this study using a variable that is fixed for the hydrolysis temperature of 80°C and a concentration of 0.1 N HCl and for fermentation pH:5, temperature: 30°C (room temperature), by microbial Saccaromyces cereviceae. As for the variable change is the addition of starter (4%, 6%, 8% starter) and fermentation time (1 day, 2 day, 3 day,   4 days, 5 days). In this study obtained results that the addition of starter and long variables derived fermentation ethanol content is highest at 4% starter, fermentation 4 days ie 10.03% v / v, for starters 6%, 4 days of fermentation that is 11.19% v/v, and 8% for the starter, fermentation of 5 days ie 12.20% v / v. While the levels of total (ml ethanol / kg of banana weevil) is highest in the addition of starter 8% and 5 days is a long fermentation 912.9003 (ml ethanol / kg of banana weevil). In this fermentation using banana weevil substrate with a water content of 22.25% and glucose levels after hydrolyzed is 13.56%.
BIOFIKSASI CO2 OLEH MIKROALGA Spirulina sp DALAM UPAYA PEMURNIAN BIOGAS Fegi Yuliandri; Yudha Duta Utama; Luqman Buchori
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 2, Nomor 4, Tahun 2013
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro,

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Abstract

The main component of biogas CH4,it is a renewable energy product that is expected to be the fuel gas. However, the presence of CO2 in the biogas decrease it’s heating value. The Purification of biogas is a solution to increase the heating value. One of eco-friendly way to purify biogas eco-friendly is by using microalgae Spirulina sp which has the CO2 Biofixation ability. This research intends to Determine the most effective flow rate of tubular type photobioreactor by using microalgae spirulina in absorbing CO2 and determine the optimum concentration of CO2 that can be absorbed by the microalgae Spirulina sp. This research is using flow rate of gas mixture (30% CO2 gas composition V: air 70% V) 0.2 L / sec, 0.5 L / sec, 1 L / sec, and 1.5 L / sec. And using composition of the feed gas (flow rate of 0.5 L / min) was 25% V CO2, 75% air V; CO2 30% V; air 70% V; V 35% CO2, 65% air V; CO2 40 % V, 60% air. The results obtained that the optimum flow rate for CO2 absroption is the flowrate  0.5 L / min with a feed gas composition CO2: air (30:70). Highest CO2 absorption amounted to 0.47%, and it doesnt reach the desired target of purification. So it needs to re-design the research’s tools to increase the amount of CO2 absorbed.
PENGIKATAN KARBON DIOKSIDA DENGAN MIKROALGA ( Chlorella vulgaris, Chlamydomonas sp., Spirullina sp. ) DALAM UPAYA UNTUK MENINGKATKAN KEMURNIAN BIOGAS Okryreza Abdurrachman; Meitiandari Mutiara; Luqman Buchori
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 2, Nomor 4, Tahun 2013
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro,

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Abstract

Biogas is gas which the main contents are 55-75% methane and 25-45% carbon dioxide. Removing CO2 content in biogas will improving biogas’s quality itself, so that the calorific value  on biogas will be higher. One way to removing CO2is with utilize microalgae’s ability to absorb CO2in photosynthesis phenomena. Purposes of this research are to measure the optimal amount of CO2 absorbed by microalgae and determine the type of microalgae is the best at absorbing CO2. This research designed with variety types of microalgae such as Chlorella vulgaris, Chlamydomonas sp., and Spirulina sp. and variety gas flow rate variabels are 20, 60, 100, 150, 200, 300 mL / min. From analysis results,  at gas flow rate 20 mL / min each microalgae can absorb CO2optimally. Spirullina sp. has the highest percentage of absorbed CO2 among Chlorella vulgaris and Chlamydomonas sp., which is by 8,91%. This study also  showed that Spirullina sp. has 0,136 g/L biomass enhancement, and that is the highest biomass enhancement among Chlorella sp. and Chlamydomonas sp., which only has 0,136 g/L and 0,130 g/L biomass enhancement.
PENGARUH PENGERINGAN JAGUNG DENGAN METODE MIXED ADSORPTION DRYING MENGGUNAKAN ZEOLITE PADA UNGGUN TERFLUIDISASI TERHADAP KANDUNGAN LEMAK DAN PROTEIN JD Ryan Christy S; Muhammad Ulil Absori; Luqman Buchori
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 1, Nomor 1, Tahun 2012
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro,

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Abstract

Corn (Zea mays L.) is one of the important world food crops, other than wheat and rice. Becausecorn is an important role as a source of food and medicine, the post-harvest handling is veryimportant because it determines the quality of the corn for the next use. Drying process byadsorption is an option to replace conventional corn drying systems. In our study, the zeolite asadsorbent was mixed with corn in campfire the fluidized with air at 30-50oC. The air willevaporate water from the corn, and at the same time, the zeolite will absorb the water from the air,so the humidity will be maintained low. Thus heat consumption can be lowered and drying willbecome faster. Required materials in this study are corn and zeolite. Research conducted usingfixed variable sampling time (15 minutes). Incoming air temperature(room temp, 30oC, 40oC, 50oC)and ratio between corn and zeolitedrying the corn, characterization must do first. The dried corn tested the water, protein, fatcontains and the colors. The results from this research show the best variable is variable with ratiobetween corn and zeolite (1:0, 1:3, 1:1, 3:1) are used as changing variables. Beforeappropriate with SNI standard for dried food ( 14 % ) is variable using incoming air temperature40oC and 50oC with ratio between corn and zeolite 1 : 3 and using incoming air temperature 50oC. The suitable variable andappropriate with SNI standard for dried food ( 14 % ) is variable using incoming air temperature 40oC and 50oC with ratio between corn and zeolite 1 : 3.
Corn Drying with Zeolite in The Fluidized Bed Dryer under Medium Temperature Mohamad Djaeni; Nurul Aishah Aishah; Harum Nissaulfasha; Luqman Buchori
IPTEK The Journal for Technology and Science Vol 24, No 2 (2013)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v24i2.182

Abstract

Drying is an important step to find high quality of corn. Based on Standard of National Industry, populer as SNI, number 01-3920-1995, the corn was well stored at moisture content 14% or below (wet basis). However, conventional corn drying dealed with in-efficient energy process and corn quality degradation. This research evaluated the performance of corn drying assisted by zeolite as moisture adsorbent. In this process, the zeolite and corn were placed in the dryer fluidized by warm air as drying medium under 40 - 50oC. The air evaporated water product from corn, and at same time the zeolite adsorbed moisture in air. So, the relative humidity of air in dryer can be kept low in which enhanced the driving force for drying. Beside that, the moisture adsoprtion by zeolite was exothermic process that can supply the energy for drying or keep the dryer temperature. Thus, the drying rate can be faster. This work foccussed to observe the effect of drying temperature, air velocity, and corn to zeolite ratio on drying time as well as corn quality. As indicators, the drying rate was estimated and the proxymates content such as protein, fat, and carbohydrate content were analyzed. The results showed that compared with conventional fluidised bed dryer, corn drying with zeolite, can speed up drying time as well as improving the constant of drying rate. In addition, the corn proximate nutrition content can be well retained. At operating temperature 40oC, air velocity 9 m.s-1, and zeolite to corn ratio 1:2, the drying time can be 60 minutes shorter compared to that without zeolite.
Co-Authors . Widayat Amin Nugroho Anggun Kurniawan Anindita Indriana Aprilina Purbasari Ardian D. Yudhistira Arum Sakti Prasetyo Astrilia Damayanti B Budiyono Berkah Fajar Bintang Ayu Kalimantini Boby Gusman Irianto Samosir Budiyono Budiyono Chusnul Khotimah Dewi Fatmawati Didi D. Anggoro Didi D. Anggoro Didi Dwi Anggoro Dinda Labibah Ubay Dyah Hesti Wardhani Dyah Hesti Wardhani Fachmy Adji Pangestu Setiawan Faleh Setia Budi Faleh Setia Budi Fegi Yuliandri Fradriyan Aulia Giveni Christina Silaen H Hadiyanto Hantoro Satriadi Hargono Hargono Harum Nissaulfasha Herawati Oktavianty Heri Cahyono Heru Susanto I Nyoman Widiasa I. Istadi I.G.B Ngurah Makertihartha Indro Sumantri Inshani Utami Istikhoratun, Titik JD Ryan Christy S Khonsa Syahidah Kusmiyati Kusmiyati Laeli Kurniasari M. Dani Supardan M. Dani Supardan M. Djaeni Maria Augustine Graciafernandy Meitiandari Mutiara Muhamad, Theobroma Guntur Muhammad Ulil Absori Nadia Taradissa Maheswari Ndaru Okvitarini Ngadi, Norzita Nita Aryanti Norzita Ngadi Nur Hidayati Nurjati Solikhin Nurul Aishah Aishah Nurushofa, Faustina Alda Okryreza Abdurrachman P Purwanto Pakpahan, Agnes J. Pakpahan, Andre W. S. Pratama, Pambudi Pajar Purwanto Purwanto Purwanto Purwanto Putri Diliyan Shakti Ratnawati Ratnawati Resti Nur Utami Riko Rikardo Putra Riyanto, Teguh Rizki Andre Handika Roikhatus Solikhah Salsabila, Unik Hanifah Saputra, Roni Ade Setia Budi Sasongko Setiadi, Iqfan Dwi Silviana Silviana Siswo Sumardiono Suherman Suherman Suherman Suherman Sulardjaka, S Teguh Riyanto Teuku Irfan Maulana Titik Istirokhatun Udin Mabruro Wahyu Fitriani Widayat Widayat Widayat Yayuk Astuti Yazid Bindar Yazid Bindar Yudha Duta Utama