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All Journal Jurnal Sains dan Teknologi Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Riau Journal of Empowerment Unri Conference Series: Community Engagement
Syelvia Putri Utami
Department Of Chemical Engineering, Engineering Faculty, Universitas Riau
Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Mechanical Engineering Social Sciences

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Journal : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Pemanfaatan Printed Circuit Board (Pcb) Motherboard Bekas Untuk Pembangkit Listrik Portabel Pebriansyah Putra; Yusnimar Sahan; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Galvani cells which are cells based on chemical reactions that can produce electric current. In this research, the generator cell was built to produce electricity. Galvani cells is consisting of zinc and used as a anodes, the motherboard printed circuit board (PCB) is used as a cathode, and a solution of NaCl as an electrolyte. The aim of this research is to estimate the performance of the galvani cell using the types of electrolyte solutions NaCl and NaOH with variation concentrations (9%, 12%, and 15%) and electrode surface area (5 cm x 10 cm, 6 cm x 10 cm, 7 cm x 10 cm). Cell performance is measured by multitester equipment and LED lights (8 volt). The results shown that the generator cell can produce electric power of 6.82 volts optimally by using 15% NaOH and 7 cm x 10 cm electrode surface area applied for this research.Keywords: electrode, electrical voltage, PCB motherboard, zinc.
Hidrolisis Mikroalga Tetraselmis Chuii Menjadi Glukosa Menggunakan Enzim Selulase Novia Azzahra; Amun Amri; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Microalgae Tetraselmis chuii is one of biomass which has a potential to be converted into glucose that can be used as raw materials for bioethanol production and other intermediate products. One of the process was used for glucose production by using enzymatic hydrolysis with enzyme cellulase. The purpose of this researches were to study the influence of the hydrolysis time and optimum conditions at enzymatic hydrolysis. The sequances of this research were raw materials analysis, enzymatic hydrolysis, and glucose analysis. The process of the hydrolysis by dissolving microalgae in a buffer solution of sodium acetate pH 5,5, pH was re-set by way of added to acetic acid in microalgae mixture. After certain pH was achieved, an enzyme cellulase was added into microalgae mixture and stirred at 100 rpm, the temperature of 400C and varied hydrolysis time. Manipulated variable on this study were hydrolysis time, namely 15, 45, 75 hours at the ratio of algae/enzyme 1:0,03. The results was obtained namely glucose, with the highest concentration of 2,78 g/L on operating conditions for 45 hours at the rasio algae/ enzyme 1:0,03.Keywords: cellulase, glucose, hydrolysis, Tetraselmis chuii, time
Pengaruh Konsentrasi Inokulum pada Fermentasi Nira Aren (Arenga Pinnata) Secara Aerob Terhadap Konversi Asam Asetat Karim Abdullah; Chairul Chairul; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Acetic acid is an organic chemical compound that gives a sour taste to vinegar and a sharp odor. Acetic acid is obtained from bioethanol using Arenga plant. Microorganism that used for processing the arenga plant into bioetanol was Saccharomyces cerevisiae and microorganism that used for processing bioethanol into acetic acid was Acetobacter aceti. The purpose of this study is to determine the effect of Acetobacter aceti inoculum concentration and fermentation time on acetic acid conversion rates. The research phase consisted of raw material preparation and making of inoculum, fermentation and analysis. The concentration of inoculum used in this study varied at 10%; 15%; and 20%. The fermentation results are taken after 3, 6, 9 and 12 days. Optimal bioethanol fermentation yield 3% (v / v) or 23.67 g / L, sugar conversion 73.17% at 10% inoculum concentration and produce the highest acetic acid 2.56% or 25,54 g / L at 12 days fermentation at concentration 10% inoculum.Keywords: Acetic acid, bioethanol, arenga plant, fermentation, conversion.
Hidrolisis Mikroalga Tetraselmis Chuii Menjadi Glukosa Menggunakan Solvent H2SO4 Dengan Variasi Waktu Hidrolisis Fajrina Qaishum; Amun Amri; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Indonesia is maritime countries with high marine biodiversity. Mikroalgae is marine biota which has an important role in an ecosystem water and it has the chemical composition such as, high carbohydrate, protein and lipid. Tetraselmis chuii is green microalgae that contains cellulose and hemicelluloses, which adequate were converted into glucose. Glucose is one of building compound for producing hydroksimetilfurfural, levulinat acid, formic acid, bio battery, bioethanol, etc. Glucose can be produced by hydrolyzing microalgae with dilute sulfuric acid use a solvent. Microalgae was dissolved in diluted sulfuric acid then heated at 100oC. The purpose of this research were obtained operation condition for biomass loading and hydrolysis time to glucose production. Tetraselmis chuii which biomass loading 3,5 gram disssolved in dilute sulfuric acid 1% during 10, 20, 30, 40 and 50 minutes. The result show that the highest concentration of glucose was obtained 7,27 g/L in biomass loading by using 3,5 gram of Tetraselmis chuii for 30 minute at 100oC.Keywords: dilute sulphuric acid, glucose, hydrolysis, microalgae, cellulose
Pengaruh Konsentrasi Gula Dan Waktu Fermentasi Terhadap Yield Asam Asetat Menggunakan Bahan Baku Nira Nipah Dan Bakteri Acetobacter Aceti Futhanul Wewe; Chairul Chairul; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Nipah plants (Nypa fruticans) grown in province of Riau especially in Lubuk Muda vilage, Bengkalis regency with land area about 50 hectares. Nipah produce sap with high sugar concentration which can be used as an alternative material for acetic acid production by fermentation using microorganisms. The purpose of this study was to determine the effect of the initial sugar concentration of nipah sap and the time of acetic acid fermentation on yield of acetic acid using Saccharomyces cerevicae and Acetobacter aceti microorganisms. Variation of initial sugar concentration was 10%, 20% and 30%, while the fermentation time is 1, 3, 5, 7 and 9 days. Acetic acid fermentation process was carried out at pH 6, stirring speed of 200 rpm and 10% inoculum. The results of analysis using the Nelson-Somogyi method revealed that the highest sugar concentration was evaporation of nipa sap 30% (172.7223 g/L). The highest concentration of acetic acid was obtained 59.399 g/L or 5.94% and yield was 51.599%. The concentration and the highest yield was obtained at 30% evaporation and the 9th day of acetic acid fermentation.Keywords : Acetic acid, Acetobacter aceti, fermentation, inoculum, nipah sap
Transesterifikasi Minyak Goreng Bekas Dengan Katalis ZnO Sintesis Dari Presipitan Zinc Oksalat ; Pengaruh Variasi Rasio Mol Reaktan Dan Jumlah Katalis Deni Afrika; Yusnimar Yusnimar; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Curently various types of catalysts have been investigated for the production of biodiesel from high free fatty acid feedstock. Waste Cooking Oils with high free fatty acid (FFA) can be used as a feedstock for biodiesel production. Various types of catalysts have been investigated for the production of biodiesel from high FFA feedstock. This research aims to sinthesize ZnO catalyst from ZnC2O4 presipitation. This catalyst was used for transesterification of CPO with high FFA into biodiesel. Then, the effect of variations in mole ratio of reactants and variations in the amount of catalyst on the yield of biodiesel produced will be studied. FFA content in the waste cooking oils is 8,16%. Therefore, Biodiesel production process was carried out with a two-stage reaction that was esterification and transesterification. The esterification reaction was held time 60 minutes at temperatures 65oC with H2SO4 catalyst as much as 1% w/w of oil. The transesterification reaction was held time 120 minutes at temperatures 65oC; the mole rato of oil : methanol were 1:6, 1:12, 1:18; ZnO catalyst amount were 0,3%, 0,4% and 0,5%; . The higest yield obtained was 92,12% in process with 1:18 in oil : methanol mole ratio and 0,5% catalyst amount. The produced biodiesel has density 867,8 kg/m3, viscosity 5,25 mm2/s, flash point 175oC, acid value 0,547 mg-KOH/g-biodiesel, saponification value 40,766 mg-KOH/g-biodiesel and alkyl ester content 98,647%.Keywords: biodiesel, esterification, transesterification, waste cooking oils, ZnO
Pembuatan Bioetanol Dari Kulit Nanas Dengan Metodeliquid State Fermentation (LSF) Dengan Variasi Waktu Dan Konsentrasi Inokulum Deasy Rahmayuni; Chairul Chairul; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The world consumption of bioethanol for a variety of uses has increased very significantly in recent years. Pineapple skin is one of the potential materials to be processed into bioethanol. Availability of food waste material containing glucose as the skin is still fairly abundant pineapple and its utilization is limited only used for fertilizer and animal feed, so it is necessary for utilization of that adds value as well as a fairly high sugar content (13.65 % reducing sugar) makes the skin of pineapple has the potential to be processed into bioethanol. Through the process of fermentation using Zymomonas mobilis, glucose is converted into ethanol and carbon dioxide. Preparation of starter inoculum carried by Zymomonas Mobilis process. Fermentation takes place in batches with a volume of 1 liter of fermentation medium, fermentation time variation of pH 5 2 , 4 , 6 and 8 days and inoculum concentration variation of 5 , 10 and 15 % (v / v). Stirring speed of 200 rpm and temperature of fermentation at room temperature (25o – 30oC). Bioethanol concentration was analyzed by using gas Chromathography Mass Spectroscopy. The process of optimum fermentation conditions shown in inoculum concentration of 10% v / v and 4 days fermentation time. The concentration of bioethanol obtained under these conditions is 43.10 % (v / v) or 23.75 g / ml.Keyword :Bioethanol, Pineapple Peel, Fermentation, Zymomonas mobilis, Liquid State Fermentation
Pembuatan Bioplastik Berbasis Pati Sagu Dengan Modifikator Asam Sitrat Dan Filler Carboxymethyl Cellulose (CMC) Dewi Maya Sari; Syelvia Putri Utami; Bahruddin Bahruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Bioplastic is one of the organic plastic that has been used as an eco-friendly food packagings whether has ability to degraded by nature. Sago starch has a potential to become raw material for bioplastics manufactured, and adding a carboxymethyl cellulose (CMC) aims to increase the tensile strength. The purposes of this research are determine the effect of sago starch, citric acid, CMC and glycerol of the characteristics bioplastics. Bioplastics product was characterized by few tests such as tensile strength (tensile strenght), elongation (elongation at break), and biodegradation. The analysis showed that filler CMC, plasticizer glycerol, and citric acid give an impact to mechanical properties of bioplastic. The best composition is bioplastic with (CMC 25% b/b, 25% b/b glycerol and 3% citric acid b/b) which is tensile strength of 8.23 MPa, elongation of 24,20%, and biodegradation 59,01%. Keyword: Bioplastic, filler, plasticizer, cross-linking agent, tensile strength
Pemanfaatan Minyak Jelantah Menjadi Biodiesel Dengan Katalis ZnO Presipitan Zinc Karbonat : Pengaruh Waktu Reaksi Dan Jumlah Katalis Hamsyah Adhari; Yusnimar Yusnimar; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Biodiesel is a highly potential material to replace diesel fuel. Renewable and environmentally friendly. Waste cooking oil can be used as raw material for making biodiesel. Free fatty acid levels are high in waste cooking oil requiring pretreatment (esterification) in the process of making biodiesel. In this study transesterification reaction conducted by catalyst synthesized ZnO of ZnCO3. This study aims to determine the effect of variations in reaction time and variations the amount of catalyst to yield biodiesel produced. After esterification of free fatty acid levels in the oil can be lowered from 6.09% to 1.02%. The transesterification reaction was held at temperatures 65oC; The mole ratio of oil and methanol is 1:18; ZnO catalyst amount is 0,5%, 0,6% and 0,7%; reaction time is 50, 75, and 100 minutes. The highest biodiesel yield obtained was 94.31% on the amount of catalyst 0.7% w / w of cooking oil with a reaction time of 100 minutes. Characteristics of biodiesel produced, namely: density and viscosity at a temperature of 40°C is 866,50 kg/m3 and 5,74 mm2/s, The flash point is 190oC, acid value 0,60 mg-KOH/g-biodiesel and the content of alkyl ester 98,42%.Keywords: Biodiesel, Waste Cooking Oil, Esterification, Transesterification, ZnO
Pembuatan Komposit Bioplastik Konduktif Berbasis Tepung Tapioka Dengan Penambahan Electrochemichal And Mechanical Liquid Exfoliation Graphene Heri Rahmana; Amun Amri; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Conductive bioplastics are biodegradable plastics that have a good ability to conduct electrical current. This study aims to create a conductive tapioca-based bioplastic composite with the addition of EMLE graphene (Electrochemical and Mechanical Liquid Exfoliation) and study the effect of the amount of EMLE graphene addition to the tensile strength and transparency of bioplastics. Conductive bioplastic production was held by using solution intercalation method. The main raw material was tapioca flour as matrix and graphene as filler. Graphene can be produced by using the Electrochemical and Mechanical Liquid Exfoliation method which made in the liquid phase and mechanically crushed or mashed by using a blender. The products were analyzed by using conductive bioplastic tensile test and transparency. The best tensile test value was 3.92 Mpa with elongation 8.516% in addition for 9% graphene and 30 minutes. The best transparency value was obtained 88.31% without graphene addition.Keywords: bioplastics, EMLE, graphene, solution intercalation, tapioca flour.
Co-Authors Amun Amri Azhari Harahap Bahruddin Bahruddin Bahruddin Chairul Chairul Chairul Chairul Deasy Rahmayuni Deni Afrika Dewi Maya Sari Dewi Sunarti Edy Saputra Evelyn Evelyn Evelyn Evelyn Fajrina Qaishum Fauzia Mulyana Fryda Kusumawati Khoirunnisa Futhanul Wewe Gilda Miranda Hamsyah Adhari Heri Rahmana Jhon Armedi Pinem Karim Abdullah Komalasari Komalasari Komalasari Komalasari Muhammad Furqan, Muhammad Muhammad Rivai Muhammad Shalahuddin Muhammad Sugandi Nor Aisha Saidina Amin Novia Azzahra Novriyani, Vivi Pebriansyah Putra Priscilla Vidya Merarin Rifati Hanifa Sri Rezeki Muria Wahyu Hidayat Windy Odelia Putri Yasminto, Habib Maulana Yusnimar Sahan Yusnimar Yusnimar