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Reaktor

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Published by Universitas Diponegoro

ISSN : 08520798 EISSN : 24075973 DOI : https://doi.org/10.14710/reaktor.xx.x.xx-xx

Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Energy Materials Science & Nanotechnology

Reaktor invites contributions of original and novel fundamental research. Reaktor publishes scientific study/ research papers, industrial problem solving related to Chemical Engineering field as well as review papers. The journal presents paper dealing with the topic related to Chemical Engineering including: Transport Phenomena and Chemical Engineering Operating Unit Chemical Reaction Technique, Chemical Kinetics, and Catalysis Designing, Modeling, and Process Optimization Energy and Conversion Technology Thermodynamics Process System Engineering and products Particulate and emulsion technologies Membrane Technology Material Development Food Technology and Bioprocess Waste Treatment Technology

Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)

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Search results for , issue "Volume 15 No.4 Oktober 2015" : 11 Documents clear

SINTESA NANOFIBER TITANIUM DIOKSIDA (TiO2) ANATASE MENGGUNAKAN METODE ELECTROSPINNING Hendri Widiyandari; Agus Purwanto
Reaktor Volume 15 No.4 Oktober 2015
Publisher : Dept. of Chemical Engineering, Diponegoro University

SYNTHESIS OF ANATASE TITANIUM DIOXIDE (TiO2) NANOFIBER BY ELECTROSPINNING METHOD. This research reported the synthesis of nanofiber anatase titanium dioxide (TiO2) using electrospinning. To produce nanofiber, the precursor solution was passed through a capillary of syringes given a positive DC voltage of 13 kV and then as-prepared nanofiber annealed at temperature of 500°C for 1 hour. The annealed samples were then analyzed using a scanning electron microscope (SEM) and x-ray diffractometer (XRD). In this study, the effect of changes in the flow rate of the precursor solution and the weight of raw material of titanium tetraisopropoxide (TTIP) to the crystallinity and morphology of the sample were systematically investigated. This research resulted that the TiO2 nanofiber have a mixed phase between anatase and rutile. The amount of rutile TiO2 could be reduced by increasing the flow rate of precursor solution. The optimum flow rate to obtain the pure anatase TiO2 was adjusted at 2.0 mL/h. In addition. TTIP weight affected the morphology of nanofiber which by increasing the amount of TTIP resulted morphological change to become more dense and uniform in shape and size. Keywords: anatase; electrospinning; nanofiber; rutile; titania Abstrak Pada penelitian ini telah berhasil dibuat nanofiber titanium dioksida (TiO2) anatase dengan menggunakan metode electrospinning. Nanofiber TiO2 dihasilkan dengan cara melewatkan larutan prekursor pada jarum suntik yang diberi tegangan DC positif 13 kV pada ujungnya. Fiber hasil spinning kemudian dikalsinasi pada suhu 500°C selama 1 jam. Sampel yang telah dikalsinasi kemudian dianalisis menggunakan scanning electron microscope (SEM) dan x-ray diffractometer (XRD). Pada penelitian ini pengaruh dari perubahan laju aliran larutan prekursor dan berat material baku titanium tetraisopropoxide (TTIP) terhadap sifat kristal dan morfologi sampel dikaji secara sistematis. Dari penelitian ini diperoleh bahwa TiO2 yang dihasilkan memiliki fase campuran antara anatase dan rutile, namun dengan menaikkan laju aliran prekursor mampu menurunkan jumlah fase rutilenya sehingga pada laju aliran 2,0 mL/h diperoleh nanofiber TiO2 dengan fase anatase murni. Berat TTIP sangat mempengaruhi morfologi nanofiber yang diperoleh dimana dengan menaikkan jumlah TTIP morfologi fiber mangalami perubahan menjadi lebih padat (dense) dan lebih seragam baik bentuk dan ukurannya. Kata kunci: anatase; electrospinning; nanofiber; rutile; titania

Front Matter Reaktor Vol 15 No. 4 Oktober 2015 Widayat, W
Reaktor Volume 15 No.4 Oktober 2015
Publisher : Dept. of Chemical Engineering, Diponegoro University

BIOSINTESA SENYAWA FENOLIK ANTIOKSIDAN DARI LIMBAH KULIT PISANGKEPOK (Musa acuminata balbisiana C.) SECARA FERMENTASI SUBMERGED MENGGUNAKAN RHIZOPUS ORYZAE Andre Siswaja; Adhitia Gunarto; Ery Susiany Retnoningtyas; Aning Ayucitra
Reaktor Volume 15 No.4 Oktober 2015
Publisher : Dept. of Chemical Engineering, Diponegoro University

BIOSYNTHESIS OF PHENOLIC ANTIOXIDANT COMPOUNDS FROM KEPOK BANANA PEEL WASTE (Musa acuminata balbisiana C.) USING SUBMERGED FERMENTATION BY RHIZOPUS ORYZAE. Phenolic antioxidant compounds can be formed through a process of biosynthesis with the help of microorganism. Kepok banana peel waste contains nutrients that support the growth of Rhizopus oryzae producing phenolic antioxidant compounds through its secondary metabolism. The objective of this research was to study the effects of fermentation time, concentration of Kepok banana peel extracts, and concentration of (NH4)2SO4 on Total Phenolic Content (TPC) of extracts substrate. Total Antioxidant Capacity (TAC) of extracts with the highest TPC value was also measured. TPC of extracts were analyzed by Folin-Ciocalteu method whilst TAC by 2,2-diphenyl-1-picrylhydrazyl (DPPH) method. Rhizopus oryzae was grown on a substrate containing kepok banana peel extract (500 g of kepok banana peel/L of water and 1000 g of kepok banana peel/L of water), (NH4)2SO4, and other nutrients. Results showed that extracts with the highest phenolic content were obtained after 72 hours fermentation on substrate containing 32.69 mg/mL of glucose (concentration of kepok banana peel 1000 g/L of water) and 0.25% w/v (NH4)2SO4. The substrate had TPC of 582.07 mg Gallic Acid Equivalent (GAE)/L extract with TAC of 88.37%. Keywords: biosynthesis; kepok banana peel; phenolic antioxidant; Rhizopus oryzae Abstrak Senyawa fenolik antioksidan dapat terbentuk melalui proses biosintesa dengan bantuan Rhizopus oryzae menggunakan substrat limbah kulit pisang kepok. Limbah kulit pisang kepok belum banyak dimanfaatkan dan memiliki nilai ekonomi rendah. Di sisi lain, kulit pisang kepok mengandung sejumlah nutrisi yang dapat mendukung pertumbuhan Rhizopus oryzae dalam memproduksi senyawa fenolik antioksidan. Penelitian ini bertujuan untuk mempelajari pengaruh waktu fermentasi, konsentrasi ekstrak kulit pisang kepok, dan konsentrasi (NH4)2SO4 terhadap perolehan senyawa fenolik, serta mempelajari Total Antioxidant Capacity (TAC) untuk ekstrak dengan perolehan senyawa fenolik tertinggi. Dalam penelitian ini, Rhizopus oryzae ditumbuhkan pada substrat ekstrak kulit pisang kepok dengan variasi 500 g kulit pisang kepok/L air dan 1000 g kulit pisang kepok/L air serta penambahan (NH4)2SO4 dengan variasi konsentrasi. Total Phenolic Content (TPC) diukur menggunakan metode Folin-Ciocalteu, sedangkan Total Antioxidant Capacity (TAC) dianalisis dengan metode DPPH (2,2-diphenyl-1-picrylhydrazyl). Hasil penelitian menunjukkan bahwa TPC tertinggi terkandung dalam konsentrasi ekstrak kulit pisang kepok 1000 g/L air dengan penambahan 0,25% b/v (NH4)2SO4) yaitu 582,07 mg Gallic Acid Equivalent (GAE)/L ekstrak dengan TAC 88,37% setelah fermentasi 72 jam. Kata kunci: biosintesa; kulit pisang kepok; fenolik antioksidan; Rhizopus oryzae

KAJIAN PROSES PRODUKSI KATALIS MIKROSFERIK UNTUK PERENGKAHAN MINYAK BUMI DENGAN PENGERING SEMBUR AJI HENDRA SAROSA; Tjokorde Walmiki Samadhi; B Budiyanto
Reaktor Volume 15 No.4 Oktober 2015
Publisher : Dept. of Chemical Engineering, Diponegoro University

STUDY OF SPRAY DRYING PROCESS FOR THE PRODUCTION OF PETROLEUM CRACKING CATALYST. Catalyst for the hydrocarbon fluid catalytic cracking (FCC) process consists of zeolite, matrix, fillers, and binders. The FCC catalyst has a microsphere form (10-120 µm), and can be produced by spray drying. Operating conditions of spray drying affect the characteristics of the microspheres FCC catalyst. The composition slurry (24% by weight) is 27% (by weight) of zeolite NaY, 33% (by weight) of Belitung kaolin, 20% (by weight) of silica alumina, 20% (by weight) of silica sol. The slurry is fed to spray dryer with constant air temperature of 190oC, ratio of atomizing air flow to slurry feed rate between 0.75:1 to 1:1, hot air flow rate between 0.2-0.3 m3/min, and slurry feed rate between 15-20 mL/min. Catalyst particle size distribution produced is in the range of 0.3752-161.1770 µm. Angle of repose of the dry product isin the 41.45-49.00 range, which translates to a flowability between passable and poor. Statistical treatment of experimental data by ANOVA method indicates that hot air velocity and interaction between the atomizing air to slurry feed rate ratio and the hot air velocity significantly affect the average particle size. The interaction between the atomizing air to slurry feed ratio with hot air velocity significantly affect particle size distribution as well. Keywords: FCC catalyst; operation conditions; spray drying Abstrak Katalis FCC memiliki empat komponen yaitu zeolit, matriks, bahan pengisi, dan bahan pengikat. Katalis FCC berbentuk mikrosfer berukuran 10-120 µm. Produksi katalis FCC melibatkan operasi pengering sembur. Kondisi operasi pengering sembur mempengaruhi karakteristik katalis FCC mikrosfer. Campuran slurry (24% berat) memiliki komposisi 27% (berat) zeolit NaY, 33% (berat) kaolin Belitung, 20% (berat) silika alumina, 20% (berat) silika sol. Slurry diumpankan ke pengering sembur dengan temperatur udara konstan 190oC, nisbah antara laju udara atomisasiterhadap laju alir umpan 0,75:1-1:1, laju alir udara panas 0,2-0,3 m3/min, dan laju umpan masuk 15-20 mL/min. Percobaan menghasilkan distribusi ukuran partikel sebesar 0,3752 µm hingga 161,1770 µm. Nilai analisis sudut diam 41,4498 sampai 48,9666, menunjukkan kriteria sifat aliran antara passable dan poor. Pengolahan data percobaan dengan metode ANOVA menunjukkan kecepatan udara panas masuk dan interaksi antara nisbah laju udara atomisasi terhadap laju alir umpan dengan kecepatan udara panas masuk berpengaruh secara signifikan terhadap rata-rata ukuran partikel dan rentang distribusi ukuran katalis FCC.

Back Matter Reaktor Vol 15 No. 4 Oktober 2015 Widayat, W
Reaktor Volume 15 No.4 Oktober 2015
Publisher : Dept. of Chemical Engineering, Diponegoro University

EFEKTIFITAS KATALIS Co/Mo PADA HYDROCRACKING MINYAK NYAMPLUNG Rismawati - Rasyid; Ricco Aditya S. W; Devita Dian.L; Mahfud Mahfud; Achmad Roesyadi
Reaktor Volume 15 No.4 Oktober 2015
Publisher : Dept. of Chemical Engineering, Diponegoro University

THE EFFECTIVTY OF Co/Mo CATALYSTS IN HYDROCRACKING OF NYAMPLUNG OIL. Hydrocracking process of Nyamplung Oil was presented using Co and Mo as metal catalysts. Ratio of CoMo metals in catalysts, can give better catalytic activity for Nyamplung Oil conversion. In this process, we used Co/Mo ratio (0.264/0.64), (0.62/1.61), and (1.23/3.22) towards SiO2 dan γ-Al2O3. This catalyst has made by wet impregnation method with drying temperature at 383 K during 8 hours and was calcined at 773 K for 5 hours. This catalyst was characterized by X-Ray Diffraction (XRD) and showed Co3O4, MoO3 and CoMoO4 substances that was deposited at CoMo/SiO2 catalyst surface. Then, Co3O4, MoO3, MoO2 and CoMoO4 substances was also appeared at CoMo/γ-Al2O3 catalyst surface. That all phases which is deposited at both of this catalyst surface, is appropriate with International Centre for Diffraction Data (ICDD standards). Then, this catalyst was used for hydrocracking process of Nyamplung Oil that takes place at batch reactor. That process was carried out at 3 MPa and 623 K over 2 hours. C5-C11 dan C12-C18 products was produced from Nyamplung Oil conversion using this process. Both of this products is increased correspond to the addition of Co and Mo metals ratio. The highest yield that was achieved is C5-C11 (24.30%) and C12-C18 (61.28%) when using Co/Mo (1.23/3.22)/γ-Al2O3 catalyst. Meanwhile, Co/Mo (1.23/3.22)/ SiO2 catalyst can produce C5-C11 (19.52%) and C12-C18 (53.55%). Keywords: CoMo catalyst; hydrocracking; nyamplung oil Abstrak Rasio katalis CoMo sebagai katalis logam memiliki aktivitas yang baik dalam mengkonversi minyak nyamplung. Proses hydrocracking menggunakan rasio Co/Mo (0,24/0,64), (0,62/1,61), dan (1,23/3,22) terhadap SiO2 dan γ-Al2O3. Katalis tersebut menggunakan metode impregnasi basah dengan suhu pengeringan 383 K selama 8 jam dan dikalsinasi selama 5 jam pada suhu 773 K. Karakterisasi katalis menggunakan XRD (X-ray diffraction) menunjukkan komponen Co3O4, MoO3 dan CoMoO4 terdeposisi pada permukaan katalis CoMo/SiO2. Kemudian untuk katalis CoMo/γ-Al2O3 terdapat Co3O4, MoO3, MoO2 dan CoMoO4 dipermukaan katalis. Fase yang terdeposisi pada permukaan kedua katalis disesuaikan dengan standar ICCD (International Centre for Diffraction Data). Hasil uji aktivitas katalis tersebut menggunakan reaktor batch dengan tekanan 3 MP dan temperatur 623 K, proses reaksi dilakukan selama 120 menit. Konversi minyak nyamplung ada proses hydrocracking diperoleh produk C5-C11 dan C12-C18. Persentase yield kedua jenis produk meningkat sesuai dengan penambahan rasio Co dan Mo. Produk dengan yield tertinggi pada katalis Co/Mo (1,23/3,22)/ SiO2 dengan C5-C11 (19,52%) dan C12-C18 (53,55%). Sementara untuk katalis Co/Mo (1,23/3,22)/ γ-Al2O3 diperoleh C5-C11 (24,30%) dan C12-C18 (61,28%). Kata kunci: katalis CoMo; hydrocracking; minyak nyamplung

PREPARASI KATALIS SILIKA SULFAT DARI ABU SEKAM PADI DAN UJI KATALITIK PADA REAKSI ESTERIFIKASI GLISEROL DENGAN ANHIDRIDA ASAM ASETAT Moh. Noor Salman; Didik Krisdiyanto; K. Khamidinal; Pedy Arsanti
Reaktor Volume 15 No.4 Oktober 2015
Publisher : Dept. of Chemical Engineering, Diponegoro University

PREPARATION OF SILICA SULFATE CATALYST FROM RICE HUSK ASH AND CATALYTIC TEST IN GLYCEROL ESTHERIFICATION REACTION WITH ACETIC ACID ANHIDROUS. Synthesis of Silica Sulfate catalyst from rice husk ash and used as catalyst for esterification reaction of glycerol with acetic acid anhydrous has done. Catalyst characterized using Infra-Red Spectrophotometer, X-Ray Diffraction and measurement of surface acidity while reaction product characterized using Gas Chromatography-Mass Spectrometer. Influence of catalyst acidity, reaction time and re-addition of acetic acid anhydrous studied by glycerol conversion and selectivity value of triacetin yielded. Infra-Red spectrophotometer and X-Ray Diffraction analysis of catalyst showed that synthesized catalyst is an amorphous silica sulfate, while esterification analysis using gas chromatography-mass spectrometer showed a triacetin product. Using of silica sulfate catalyst in esterification reaction of glycerol could convert glycerol up to 77% and SS-20 catalyst could give triacetin selectivity value up to 98%. Influence of catalyst acidity doesn’t showed significant influence of glycerol converting value. However, increasing of reaction time could increase glycerol converting and triacetin selectivity. Re-addition of acetic acid anhydrous could increase its selectivity value up to 100%. Keywords: acetic acid anhydrous; glycerol; triacetin Abstrak Silika sulfat telah dibuat dari abu sekam padi dan digunakan sebagai katalis dalam reaksi esterifikasi gliserol dengan anhidrida asam asetat. Katalis dikarakterisasi dengan spektrofotometer infra merah dan difraksi sinar-X sedangkan produk reaksi dikarakterisasi dengan kromatografi gas spektrometri massa. Pengaruh keasaman katalis, waktu reaksi dan penambahan kembali anhidrida asam asetat dipelajari terhadap konversi gliserol dan nilai selektivitas triacetin yang terbentuk. Hasil analisis spektrofotometer infra merah dan difraksi sinar-X terhadap katalis menunjukkan bahwa katalis yang disintesis berupa silika sulfat yang berbentuk amorf, sedangkan hasil analisa terhadap produk esterifikasi menggunakan kromatografi gas spektrometri massa menunjukkan adanya produk triacetin. Penggunaan katalis silika sulfat pada reaksi esterifikasi gliserol dapat mengkonversi gliserol sebesar 77%, dan untuk katalis SS-20 dapat memberikan nilai selektifitas triacetin sebesar 98%. Pengaruh keasaman katalis tidak memberikan pengaruh signifikan terhadap nilai konversi gliserol. Namun semakin lama waktu reaksi nilai konversi gliserol dan selektivitas triasetin meningkat dan penambahan kembali anhidrida asam asetat dapat meningkatkan nilai selektivitas hingga 100%. Kata kunci: anhidrida asam asetat; gliserol; triacetin

HIDROLISIS ENZIMATIK KITOSAN DENGAN KOMBINASI ENZIM ENDO-GLUCANASE DAN CELLOBIOHYDROLASE Nur Rokhati; Bambang Pramudono; Titik Istirokhatun; Mohammad Sulchan; Dyah Ayu Kresnianingrum; Luthfi Kurnia Dewi
Reaktor Volume 15 No.4 Oktober 2015
Publisher : Dept. of Chemical Engineering, Diponegoro University

Abstract CHITOSAN ENZYMATIC HYDROLYSIS USING A COMBINATION OF ENDO-GLUCANASE AND CELLOBIOHYDROLASE. Chitosan is very promising in various fields including medicine, pharmacology, and the food industry. However, the application of this polysaccharide is limited by its high molecular weight resulting in its low solubility in aqueous media. In this respect, the chitosan with shorter chain length, display a reduced viscosity and are soluble in aqueous media at pH values close to neutrality. The aim of this study is the hydrolysis of chitosan to obtain a low molecular weight chitosan using enzymes endo-glucanase and cellobiohydrolase. The hydrolysis of chitosan was carried out under a temperature of 40° C and pH 5. Chitosan degradation was monitored by the analysis of reducing sugars and viscosity, whereas the chemical characterization of chitosan is done by using test FTIR (infrared spectroscopy). The results showed that enzyme treatment resulted in a substantial loss in viscosity of the chitosan solution shows depolymerization. Depolymerization using endo-glucanase took place very quickly during the initial 15 minutes. The rate of viscosity decrease on chitosan degradation using cellobiohydrolase is lower than using endo-glucanase. When the reaction time was 4 h, the lowest viscosity is showed by cellobiohydrolase, and the highest solubility is showed by combination of endo-glucanase and cellobiohydrolase. Keywords: endo-glucanase; cellobiohydrolase; chitosan; hydrolysis Abstrak Kitosan dapat dimanfaatkan di berbagai bidang seperti kedokteran, farmasi dan industri makanan. Aplikasi kitosan sering dibatasi oleh berat molekul kitosan yang tinggi sehingga viskositasnya tinggi dan kelarutannya rendah. Kitosan dengan rantai polimer pendek, akan mempunyai viskositas rendah, dan mudah larut pada larutan/air dengan pH mendekati netral. Penelitian ini bertujuan untuk menghidrolisis kitosan secara enzimatis menggunakan enzim endo-glucanase dan cellobiohydrolase. Hidrolisis kitosan dilakukan pada suhu 40 °C dan pH 5. Degradasi kitosan dipantau melalui analisa gula reduksi dan viskositas, sedangkan karakterisasi kimia kitosan dilakukan dengan menggunakan uji FTIR (infra red spectroscopy). Hasil penelitian menunjukkan bahwa hidrolisis enzimatis kitosan dapat menyebabkan terjadinya penurunan berat molekul yang ditandai dengan adanya penurunan viscositas larutan kitosan. Pada 15 menit awal hidrolisis terjadi penurunan viskositas yang sangat besar. Laju penurunan viskositas enzim cellobiohydrolase lebih rendah dibanding dengan enzime endo-glucanase. Setelah waktu reaksi 4 jam, viskositas terendah diperoleh pada enzime cellobiohydrolase, sedangkan kelarutan tertinggi diperoleh pada kombinasi enzime endo-glucanase dan cellobiohydrolase. Kata kunci: endo-glucanase; cellobiohydrolase; kitosan; hidrolisis

PEMANFAATAN LIMBAH CAIR INDUSTRI TAHU UNTUK PRODUKSI BIOMASSA MIKROALGA Nannochloropsis Sp SEBAGAI BAHAN BAKU BIODIESEL Widayat Widayat; H Hadiyanto
Reaktor Volume 15 No.4 Oktober 2015
Publisher : Dept. of Chemical Engineering, Diponegoro University

Indonesia is one of one of productive tofu producer both for industry or home made scale. Tofu industries contribute wastewater up to 20 millions cubic meter (m3) per year. Currently, tofu waste water was treated by anaerobic and aerobic methods which reveal some disadvantages. To overcome the disadvantages of both methods, wastewater of tofu industry was used as a medium for the cultivation of microalgae. Nannochloropsis sp is one of microalgae species which has high content of lipid and thus can be converted to biodiesel. This study examined the growth rate, biomass productivity, reduced organic levels of COD and BOD, and total lipid of microalgae Nannochloropsis sp which cultivated in tofu wastewater medium. The optimum growth of Nannochloropsis sp was found at 20% vol of liquid waste water which produce lipids of 34.25 % and also can reduce COD up to 77.40 %. The optimum nutrients of NaHCO3 was showed at the composition of 70 mg / L which decrease COD up to 78.81 % and produce lipids 16.841 %. The addition of nutrition every 4 days was able to reduce the COD up to 81.835 % and produce 14.195 % yield of lipids. Keywords: tofu wastewater, Nannochloropsis sp., biodiesel, COD & BODAbstrak Indonesia merupakan salah satu negara penghasil tahu yang cukup produktif baik skala industri maupun rumahan. Industri tahu menyumbang limbah cair mencapai 20 juta meter kubik (m3) per tahun. Pada saat ini pengolahan limbah tahu cair dilakukan dengan metode anaerobik maupun aerobik. Akan tetapi kedua metode tersebut memiliki beberapa kelemahan. Untuk mengatasi kelemahan kedua metode tersebut, limbah tahu cair dapat dimanfaatkan sebagai media kultivasi mikroalga. Nannochloropsis sp merupakan mikroalga yang mampu menghasilkan lipid yang besar tersebut dapat dikonversi menjadi salah satu energi alternative biodiesel. Dalam penelitian ini dikaji laju pertumbuhan, produktivitas biomassa, penurunan kadar organik COD dan BOD, dan total lipid mikroalga jenis Nannochloropsis sp yang dikultivasi pada medium limbah tahu cair. Pertumbuhan Nannochloropsis sp. optimum pada medium 20% volume limbah tahu cair yang menghasilkan lipid sebanyak 34,25% dan dapat menurunkan COD hingga 77,40%. Penambahan nutrisi NaHCO3optimum pada komposisi 70 mg/l yang mampu menurunkan COD sebesar 78,81% dan menghasilkan lipid sebanyak 16,841%. Waktu penambahan nutrisi setiap 4 hari sekali mampu menurunkan COD sebesar 81,835% dan menghasilkan lipid sebesar 14,195%. Keywords: limbah tahu, Nannochloropsis sp., biodiesel, COD & BOD

CELL DISTRUPTION MIKROALGA SECARA ENZIMATIS DENGAN SELLULASE Padil Padil; Siti Syamsiah; Muslikhin Hidayat; Rina Sri Kasiamdari
Reaktor Volume 15 No.4 Oktober 2015
Publisher : Dept. of Chemical Engineering, Diponegoro University

ENZYMATIC CELL DISRUPTION OF MICROALGAE USING CELLULASE. Micro-algae is one source of potential alternative energy of third generation to be developed as bioethanol raw material. The starch content trapped in Micro-algae cell walls causing the need of cell distruption to release and convert starch into simple glucose before the fermentation process. This study aims to open up the cell walls of Micro-algae and to explore the effect of sellulase enzymes from Aspergillus niger as Micro-algae cell distruption strategy as well as the optimization of process parameters, i.e the concentration of enzyme, temperature, pH, and time which produce the highest glucose yield. The results showed that the highest glucose yield was 82.44% (w/w) obtained at an enzyme concentration of 30% (w/w), temperature 45oC, pH of 4.5 at 40 minutes, the amount of Micro-algae as 0.5 g/L. In general, cell distruption method using sellulase enzyme was proven to be a promising option to open the cell walls of Micro-algae and convert cellulose into simple glucose simultaneously in producing bioethanol. Keywords: bioethanol; cellulose; cell distruption; enzymatic; micro-algae; starch Abstrak Mikroalga merupakan salah satu sumber energi alternatif generasi ketiga yang potensial untuk dikembangkan sebagai bahan baku bioetanol. Kandungan pati yang terperangkap dalam dinding sel mikroalga menyebabkan perlunya cell distruption untuk melepaskan sekaligus mengkonversi pati menjadi glukosa sederhana sebelum proses fermentasi. Penelitian ini bertujuan untuk membuka dinding sel mikroalga sekaligus mengeksplorasi pengaruh enzim sellulase dari aspergillus niger sebagai strategi cell distruption mikroalga serta melakukan optimasi parameter proses yaitu konsentrasi enzim, suhu, pH, dan waktu yang memberikan yield glukosa tertinggi. Hasil penelitian menunjukkan bahwa yield glukosa tertinggi adalah 82,44% (w/w) yang diperoleh pada konsentrasi enzim 30% (w/w), suhu 450C, pH 4,5 pada waktu 40 menit, dengan jumlah mikroalga 0,5 g/L. Secara umum, metode cell distruption dengan menggunakan enzim sellulase terbukti menjadi pilihan yang menjanjikan untuk membuka dinding sel mikroalga sekaligus mengkonversi selulosa menjadi glukosa sederhana dalam memproduksi bioetanol.

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Dessy Ariyanti

Contact Email
dessy.ariyanti@che.undip.ac.id

Phone
+62247460058

Journal Mail Official
j.reaktor@che.undip.ac.id

Editorial Address
Department of Chemical Engineering, Diponegoro University Jl. Prof. Soedarto SH Tembalang Semarang 50275

Location
Kota semarang,

Jawa tengah

INDONESIA

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Dessy Ariyanti

Contact Email dessy.ariyanti@che.undip.ac.id

Phone +62247460058

Journal Mail Official j.reaktor@che.undip.ac.id

Editorial Address Department of Chemical Engineering, Diponegoro University Jl. Prof. Soedarto SH Tembalang Semarang 50275

Location Kota semarang, Jawa tengah INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Dessy Ariyanti

Contact Email
dessy.ariyanti@che.undip.ac.id

Phone
+62247460058

Journal Mail Official
j.reaktor@che.undip.ac.id

Editorial Address
Department of Chemical Engineering, Diponegoro University Jl. Prof. Soedarto SH Tembalang Semarang 50275

Location
Kota semarang,

Jawa tengah

INDONESIA