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Alfarisi, Cory Dian
Chemical Engineering Department, Universitas Riau, Indonesia
Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Other

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Sintesis Biodiesel Dari Palm Fatty Acid Destillate (PFAD) Menggunakan Katalis Cu-Hap Dengan Variasi Kecepatan Pengadukan Dan Waktu Reaksi Putri, Desi Erika; Azis, Yelmida; Alfarisi, Cory Dian
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

This research will shown the effect of stirring velocity and reaction time to biodiesel yield production and determine the physical and chemical characteristics of biodiesel. Palm fatty acid destillate (PFAD) synthesis which is a by-product of cooking oil processing becomes biodiesel through esterification. The esterification was done by mixing PFAD by 25 gram with Cu-HAp catalyst 0.25 gram and 97 ml methanol. Stirring velocity is 250 rpm, 300 rpm and 350 rpm and reaction time variation is 2 hours, 3 hours and 4 hours at 60 ° C. The highest biodiesel yield at 300 rpm stirring speed with a reaction time of 2 h is 63%. For physics characteristic of biodiesel in the form of density are: 0,884 gr/ml - 0,902 gr/ml, viscosity: 4,181 cSt - 5,029 cSt, acid number: 0,553 mg KOH/g oil - 1,661 mg KOH/g oil and calorific value: 9048 - 9813 Kcal / kg produced according to biodiesel standards SNI-04-7182-2006. For the analysis of GC-MS (Gas Chromatography-Mass Spectroscopy) the main compounds found in biodiesel from PFAD are methyl myristate, methyl palmitate, methyl linoleate, methyl oleate and methyl stearate is 78,88%Keywords: Biodiesel, PFAD, Cu-HAp catalyst, esterification.
Pengaruh Penambahan Tepung Biji Durian pada Pembuatan Bioplastik Cory Dian Alfarisi; Yulia Fitri; Detria Khaerun Nisa
Jurnal Ilmiah Biosaintropis (Bioscience -Tropic) Vol 7 No 1 (2021): Agustus 2021
Publisher : Fakultas Matematika & Ilmu Pengetahuan Alam - Universitas Islam Malang

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Abstract

Plastic is a type of packaging that is often used in everyday life, however, in general, the plastic used is synthetic plastic which takes a very long time to decompose. Bioplastic is an environmentally friendly plastic film made from organic materials so that it can decompose naturally with the help of microorganisms. This study aims to determine the effects which have the potential as a supporting material in increasing bioplastic characteristics such as thickness, water absorption and biodegradation. The research method was to use experiment and analysis of varian. Durian seed flour is carried out through a process of sorting, washing, stripping, soaking, slicing, drying, packing and storing. Meanwhile, the method of making bioplastics is done by mixing tapioca flour, cornstarch, durian seed flour of adding various durian seed flour: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 grams, distilled water, acetic acid and glycerin. The analysis results obtained on the test of bioplastic characteristics, namely, thickness test ranging from 0.63 mm - 0.84 mm and water resistance test ranging from 71,43%-86,54% which water absorption test ranging from 13.46% - 28.57% and the biodegradability test ranging from 17.78% - 47 , 06%. Keywords: durian seeds, bioplastics, biodegradability, flour ABSTRAK Plastik adalah jenis pengemas yang sering dimanfaatkan dalam kehidupan sehari-hari, akan tetapi pada umumnya plastik yang digunakan merupakan plastik sintetik yang membutuhkan waktu yang sangat lama untuk terurai. Bioplastik merupakan film plastik yang ramah lingkungan yang terbuat dari bahan-bahan organik sehingga dapat terurai secara alami dengan bantuan mikroorganisme. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan tepung biji durian yang berpotensi sebagai bahan penunjang dalam meningkatkan karakteristik bioplastik seperti ketebalan, ketahanan terhadap air dan biodegradasi. Metode penelitian adalah menggunakan eksperimen dan sidik ragam data. Tepung biji durian dilakukan melalui proses penyortiran, pencucian, pengupasan, perendaman, pengirisan, pengeringan, penepungan dan penyimpanan. Sedangkan untuk metode pembuatan bioplastik dilakukan dengan mencampurkan tepung tapioka, tepung maizena, tepung biji durian dengan variasi: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 gram, akuades, asam asetat dan gliserin. Hasil analisa yang didapat pada pengujian karakteristik bioplastik yaitu, uji ketebalan yang berkisar 0,63 mm – 0,84 mm, uji ketahanan terhadap air yang berkisar 71,43%-86,54% dengan penyerapan air berkisar 13,46 % - 28,57% dan uji biodegradibilitas yang berkisar 17,78% - 47,06%. Kata kunci: biji durian, bioplastik, biodegradibilitas, tepung.
Pembuatan Batu Bata Dengan Penambahan Tanah Terkontaminasi Minyak Annisa Aprilya Putri; Ahmad Fadli; Cory Dian Alfarisi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The petroleum industry is one of the largest oil and gas companies in Indonesia. From the exploration and production of petroleum, it turns out that the petroleum industry also produces petroleum waste which can pollute the soil. For waste handling, it is necessary to have efficient and environmentally friendly petroleum processing, in the form of brick making. The purpose of this study was to study the effect of adding a mixture of oil and clay contaminated soil and the effect of drying time on the bricks obtained from the tests carried out, namely testing compressive strength, density, water absorption, and porosity. The procedure was started with weighing all materials with variations of 2 kg, 10 kg and 14 kg oil-contaminated soil (TTM), mixing oil and cement, and then stirring water until it was homogeneous. the next step has been the processed of molding the stones and then drying them for 3, 5 and 7 days and finally the burning process has been carried out. Variations were studied by differentiating the percentage composition of the soil mixture contaminated with oil and clay used. The test results from the compressive strength, density, absorption and porosity test show that the best sample for consumers is the sample with 2 Kg oil-contaminated soil on drying for 7 days while the best sample in terms of utilization is the sample with the composition of 14 Kg oil-contaminated soil.Keywords: brick, compressive strength, porosity, oil contaminated soil
Pengaruh Konsentrasi Gula Dan Waktu Fermentasi Terhadap Fermentasi Asam Asetat Menggunakan Kulit Nanas Dan Acetobacter Aceti Ahmad Dedi Fadillah; Chairul Chairul; Cory Dian Alfarisi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Pineapple (Ananas comosus (L) Merr) is a fruit which has a golden yellow color. Pineapple can thrive in tropical climates such as in Indonesia. Pineapple production in Indonesia in 2009 was 1,558,196 tons. The sugar contained in pineapple is 2.32% glucose, 1.42% fructose, and 7.89% sucrose. So that it can be used as an alternative material for the production of acetic acid. Acetic acid can be produced from raw materials containing starch or sugar by fermentation using microorganisms. The purpose of this study was to determine the effect of fermentation time and sugar concentration on the yield of acetic acid produced and to find out the optimal time and concentration of sugar in pineapple rind fermentation into acetic acid using Saccharomyces cerevisiae and Acetobacter aceti bacteria. The initial sugar concentration variations were 10%, 20%, and 30%, while the fermentation time was 2, 3, 4, 5, 6 days. The acetic acid fermentation process was carried out at pH 6, stirring speed 200 rpm and 10% inoculum. The test results using the Nelson-Samogyi method showed that the highest sugar concentration was 30% (174,678 g/L) of sugar added to pineapple rind raw material. The highest concentration of acetic acid was obtained 35.581 g/L and the yield of 30.555%. The best fermentation time is the 6th day of fermentation.Keywords: Acetobacter aceti, acetic acid, fermentation, inoculum, pineapple
Isoterm Dan Termodinamika Adsorpsi Pada Methylene Blue Menggunakan Hidroksiapatit Dian Novita Rahmawaty; Yelmida Azis; Cory Dian Alfarisi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The adsorption model was carried out to find out the appropriate adsorption mechanism in the methylene blue adsorption process using hydroxyapatite. The aim of this study was todetermine the equilibrium time, the effects of methylene blue’s initial concentration, adsorption temperatures and the adsorption models. Analysis was conducted by spectrophotometric method, then tested on the Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (DRK) isotherm model. The result showed that the best initial concentration of methylene blue for adsorption temperature 30℃ with adsorption capacity 2,090 mg/g and 41,79% of removal efficiency. The adsorption followed the Freundlich isotherm model. Thethermodynamic parameters (ΔH = -8,4 kJ/mol, ΔG < 0 dan ΔS = -80,70 J/mol K) indicated that he adsorption process was a physically and spontaneously excothermic reaction.Keywords: adsorption, Freundlich, hydroxyapatite, isotherm, methylene blue.
Pembuatan Asam Asetat Dari Sari Kulit Nenas (Ananas Comosus) Menggunakan Acetobacter Aceti Dengan Variasi Volume Inokulum Dan Waktu Fermentasi Multi Handriyani; Chairul Chairul; Cory Dian Alfarisi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Acetic acid is an organic chemical compound that is colorless and has a sharp odor. Pineapple skin can be used as a raw material for making acetic acid by utilizing microorganisms. Microorganisms used to process pineapple skin extract into bioethanol are Saccharomyces cerevisiae and the microorganism used to process bioethanol into acetic acid is Acetobacter aceti. The purpose of this study is to convert sugar in pineapple skin juice through the fermentation process to acetic acid and determine the effect of variations inoculum volume and fermentation time on the resulting acetic acid. This research phase consisted of raw material preparation and inoculum making, fermentation and analysis. The variation of bioethanol fermentation time is 1, 3 and 5 days, while the variation of the inoculum used in this study is 10%; 13%; and 16%. Fermentation results are taken after 1, 3, 5, 7 and 9 days. Optimum fermentation results are bioethanol 5% (v / v) or 39.47 g / L and Yield 53.94% and acetic acid concentration 37.79 g / L and Yield 91.80%. This maximum concentration was obtained on the 9th day of acetic acid fermentation in 13% inoculum of Acetobacter aceti with bioethanol substrate with a fermentation time of 5 days. Keywords : Acetic acid, bioethanol, pineapple skin juice, fermentation, conversion
Pembuatan nata de cassava dari limbah cair tapioka dengan menggunakan sumber nitrogen alami yang berbeda Cory Dian Alfarisi; Yelmida; Ida Zahrina; Anisa Mutamima
Jurnal Ilmiah Pertanian Vol. 17 No. 2 (2021): Jurnal Ilmiah Pertanian
Publisher : Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/jip.v17i2.6208

Abstract

Liquid waste from processing cassava into tapioca starch is carbohydrate-rich waste and can be used as a growth medium for the Acetobacter xylinum, which is useful in producing one of the fermentation products, i.e. nata. Several factors influence the production of nata, one of them is the addition of nutrients in the form of nitrogen in the fermentation medium. The nitrogen source used is usually from inorganic fertilizers, such as urea and ammonium sulfate. In this study, fermentation of tapioca starch wastewater was developed, using a natural sources of nitrogen derived from soybean and green bean sprouts extract. Nata was made by treating various concentrations of soybean and green bean sprouts extract (3%, 4%, 5%) and fermentation time (6 days, 7 days, 8 days, 9 days and 10 days). The characteristics of the nata product were seen from the thickness and yield of the nata. The nata de cassava product's optimum results were tested for thickness, yield, and moisture content. The results showed that the best type of natural nitrogen source was soybean sprouts extract 5%, fermentation time of 10 days with a thickness of 0.55 cm, the water content of 97.58%, and yield of 63.09%
Synthesis and Characterization of Hydroxyapatite from Duck Eggshell by Wet Precipitation Process Yelmida Azis; Cory Dian Alfarisi; Komalasari Komalasari; Khairat Khairat; Yusnimar Sahan
Journal of Applied Materials and Technology Vol. 3 No. 1 (2021): September 2021
Publisher : AMTS and Faculty of Engineering - Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/Jamt.3.1.8-11

Abstract

Hydroxyapatite (HAp, Ca10(PO4)6(OH)2) is the most stable form of calcium phosphate and widely used in various medical applications, mainly in orthopedics and dentistry due to its close similarities with the inorganic mineral component of bone and teeth. This study aims to synthesize hydroxyapatite from duck eggshell using the precipitation method. The duck eggshell was calcined, hydrated (slaking) and underwent carbonation to form Precipitated Calcium Carbonate (PCC).  Afterwards, (NH4)2HPO4 was added to produce HAp by varying the molar ratio of Ca/P by 1.67, 1.77 and 1.87 and stirring speed by 200, 250, 300rpm under basic condition (pH 10 – 11). The best results were obtained at a molar ratio of 1.77 with 200rpm stirring speed. Furthermore, the X-ray Diffraction (XRD) analysis showed that its crystals were hexagonal with sizes of 23.062nm, in the absence of other crystalline phases. Therefore, the hydroxyapatite was obtained in the agglomerates form with a specific surface area of ??55.929m2/g.
Pelatihan Pembuatan Donat Praktis dengan Metode Autolisis di Lingkungan Dharma Wanita Persatuan Fakultas Teknik Universitas Riau Nurfatihayati Nurfatihayati; Anisa Mutamima; Cory Dian Alfarisi; Drastinawati Drastinawati; Yelmida A
Warta Pengabdian Andalas Vol 29 No 2 (2022)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jwa.29.2.123-129.2022

Abstract

Doughnuts are one of the most popular sweet foods for people of all ages around the world. Although made from simple ingredients such as flour, sugar, eggs, yeast, milk powder, salt, water, and margarine, however producing doughnuts requires special techniques to produce good-quality doughnuts. It needs more energy, even physically and electrical equipment. A workshop on doughnut production with autolyze method for Dharma Women Association, Faculty of Engineering, University of Riau, was conducted to increase the knowledge and skills of members of the organization in making healthy dishes for the family. In this workshop, doughnuts were made using the autolysis method, which is mixing bread flour with water and then keeping the dough until gluten was formed. The formation of gluten is one indicator of the formation of smooth, soft, and elastic dough. The workshop results showed high interest among the Dharma Women Association members in making doughnuts with this alternative method.
Pengaruh Penambahan Arang Pelepah Sawit terhadap Sifat Mekanik Batu Bata Merah Cory Dian Alfarisi; Padil Padil; Drastinawati Drastinawati; Wisrayetti Wisrayetti; Nurfatihayati Nurfatihayati; Yelmida A
Jurnal Ilmiah Biosaintropis (Bioscience-Tropic) Vol 8 No 2 (2023): Januari 2023
Publisher : Fakultas Matematika & Ilmu Pengetahuan Alam - Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/e-jbst.v8i2.498

Abstract

Brick is a building material that is often used for residential walls. The bricks in this study were bricks with the addition of palm frond charcoal in the manufacturing process. The aims of this study were (1) to determine the effect of adding palm stem charcoal on the manufacture of red bricks in terms of compressive strength, water absorption (Suction rate) and apparent density (apparent density). (2) Comparing the test results with the SNI 15-2094-2000 standard. The manufacture of experimental bricks begins with adding clay with pulverized palm frond charcoal in a ratio of 100:0, 95:5, 90:10, 85:15 and 80:20, then molded, dried, burned and tested for new mechanical properties. brick. In this study, the compressive strength of bricks that enter class 100 is a ratio of 100:0 and 95:5 namely 11.75 Mpa and 10.10 Mpa, then bricks grade 50 is a ratio of 90:10 and 85:15 which is 8.08 Mpa and 6.27 Mpa. The water absorption capacity of bricks that meet the requirements of SNI 15-2094-2000 is a ratio of 100:0 and 95:5, namely 18.65% and 19.74%. The apparent density of bricks that meet the requirements of SNI 15-2094-2000 are the ratios of 100:0, 95:5, 90:10 and 85:15, which are 1.63 g/cm3, 1.54 g/cm3, 1,37 g/cm3 and 1.24 g/cm3. Bricks that meet the standards and are recommended as masonry bricks are bricks with a ratio of 95:5.
Co-Authors Adam Rafif Aldori Ahmad Dedi Fadillah Ahmad Fadli Ahmad Fadli Ahmad Fadli Aldo Seveno Mahendra Amun Amri Annisa Aprilya Putri Chairul Chairul Delef, Fahrul Fajar Desi Heltina Detria Khaerun Nisa Dian Novita Rahmawaty Drastinawati Drastinawati Drastinawati Drastinawati Drastinawati Drastinawati, Drastinawati Eden Putra Elvi Yenie Fahrul Fajar Delef Habib, Alltop Amri Ya Ida Zahrina Idral Amri Indra Purnama Khairat, Khairat Komalasari Komalasari Muhammad Ichwan Pradana Multi Handriyani Mutamima, Anisa Nurfatihayati Padil Padil Putra, Eden Putri, Desi Erika Rozanna Sri Irianty Silvia Reni Yenti Silvia Reni Yenti Silvia Reni Yenti Silvia Reni Yenti Suhendri Suhendri Sunarno Sunarno Sunarno Sunarno Sunarno Surya Danta Alberto Barus Utama, Panca Setia Wisrayetti Wisrayetti Wisrayetti Wisrayetti Wisrayetti Wisrayetti Yelmida Azis Yulia Fitri Yusnimar Sahan Zultiniar Zultiniar