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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Journal of Bioprocess Chemical and Environmental Engineering Science
Idral Amri
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Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Decision Sciences, Operations Research & Management Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Teknologi Membran Dalam Pengolahan Limbah Cair Industri Hermana Setti Tarigan; Jhon Armedi Pinem; Idral Amri
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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Membrane technology began to be developed at this time. The low energy needed in the operation of membrane technology is one of the triggers for this technology to develope. Stages of the process carried out is the process of coaguulation-flocculation to reduce membrane work and ultrafiltration processes with operating pressures of 1, 3, and 5 bars. The results obtained are the highest percentage of rejection UF membrane process obtained at a pressure of 5 bar that is equal to 84.92% BOD5; 84.71% COD; and 62.5% TSS with an average flux value of 53.69 L/m2.hour.Membrane-based processes with pressure thrust such as microfiltration, ultrafiltration, nanofiltration, and reserve osmosis have been widely used in water and wastewater treatment processes. The wastewater used in this study came from one of the pulp and paper industries. Keywords: Pulp and paper wastewater, Ultrafiltration, Coagulation, Flocculation, rejection
Pemanfaatan Daun Nanas Sebagai Bahan Alternatif Dalam Pembuatan Komposit Fiberglass Reinforced Plastic Marina Marina; Idral Amri; Nirwana Nirwana
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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Composites became one of the alternative materials being developed and widely used in the industrial world. Composites that use natural fibers are chosen because in addition to cheap also environmental friendly. One of the natural fibers that exist around us and has a pretty good potential is pineapple leaf fiber. The purpose of this reasearch is to produce fiberglass reinforced plastic composite using pineapple leaf fiber as an alternative filler, to determine the effect of addition and particle size of pineapple leaf fiber to composite mechanical properties for water treatment plant unit. The composites in this study used pineapple leaf fiber, polyesther resin, methyl ethyl ketone peroxide (MEKPO) catalyst and lubricant. The composite is made through 3 phases of pineapple fiber processing is separation of leaf fiber, fiber drying, and fiber processing into powder and then proceed with the composite making process. Variations were done on pineapple fiber, which as variation of 10%, 20% and 30% fiber addition and fiber particle size variation 60 mesh, 80 mesh and 100 mesh. The results showed that the highest mechanical properties obtained composites with 30% fiber and 100 mesh particle size include: tensile strength 64,672 MPa, flexural strength 430,9 MPa, and modulus of elasticity 5880,7 MPa. The resulting composite meets the standard specification of fiberglass reinforced plastic for water treatment unit based on SNI 7504: 2011.Keywords: composites, fiber, pineapple leaves, polyesther
Penyisihan BOD5, COD Dan TSS Limbah Cair Pulp Dan Kertas Dengan Proses Koagulasi-Flokulasi Dan Membran Nanofiltrasi Hendriadi Siregar; Jhon Armedi Pinem; Idral Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Membrane technology began to be developed at this time. The low energy needed in the operation of membrane technology is one of the triggers for this technology to develope. Stages of the process carried out is the process of coaguulation-flocculation to reduce membrane work and nanofiltration processes with operating pressures of 3, 6, and 9 bars. The results obtained are the highest percentage of rejection NF membrane process obtained at a pressure of 9 bar that is equal to 76,30% BOD5; 90,54% COD; and 90% TSS with an average flux value of 19,49 L/m2.hour. Membrane-based processes with pressure thrust such as microfiltration, ultrafiltration, nanofiltration, and reserve osmosis have been widely used in water and wastewater treatment processes. The wastewater used in this study came from one of the pulp and paper industries. Keywords: Pulp and paper wastewater, nanofiltration, Coagulation, Flocculation, rejection
Sintesis Membran Silika Untuk Pengolahan Limbah Rhodamin B Variasi Komposisi Poly Etyhlen Glycol (PEG) Mutia Yuli Rahmawati; Jhon Armedi Pinem; Idral Amri
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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Membrane is a selective and semipermeable layer that lies between two phases, namely feed phase and permeate phase. Membrane synthesis usingsilica with phase inversion method. The purpose of this research were to make membranes of silica for waste Rhodamin Bwith 0; 0,15; 0,30; dan 0,45 gram by weight PEG and operating pressure of 1, 3, and 5 bars. This research produced porous membrane. The characterization membranes analysis were SEM analysis, flux and rejection. Based on Flux and rejection results showed that membrane with 0,30 gram composition of PEGwith of porous is 0,056 μmwas the most effective performance with the flux operating pressure 1, 3, and 5 bar was 18,13 L/m2.h, 31,20 L/m2.h, 41,36 L/m2.h and rejection elimination of Rhodamin B was 81,15%, 59,62% and34,08%. Based on characterization of membrane permeability, selectivity, and porous statistic showed that membrane silica were proven as membrane ultrafiltration. With a range of flux of 10-50 L/m2.h and a range of porous of 0,001-0,1 μm.Keywords: phase inversion, membrane, waste Rhodamin B, ultrafiltration
Kinetika Reaksi Deproteinasi Limbah Udang Ebi Pada Isolasi Kitin Ridho Wijaya; Ahmad Fadli; Idral Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Chitin is a biopolymer and can be synthesized from ebi shrimp waste through deproteination and demineralization processes. The purpose of this study was to determine the kinetics of deproteination reaction in chitin isolate with variable reaction temperature and stirring rate. The study began by reacting shrimp waste powder with 3.5% NaOH solution using a ratio of 1:10 at 75 ° C, 85 ° C and 95 ° C and 200 stirring speeds, and 250 rpm in a glass beaker equipped with stirrer. Samples were taken every 10, 20, 30, 50, 70, 90, 110 and 120 minutes as much as 40 mL, then washed until the pH was neutral and the sample filtered. The shrimp powder produced was analyzed using titration method of formol to know the protein content contained in the sample. The results showed that the reaction kinetics follows the pseudo first order equation. The higher the temperature and the speed of stirring given to the deproteination process the greater the concentration produced. The reaction speed constant at 75°C, 85°C and 95°C with 200 rpm stirring speed was obtained at k = 0.0098 min-1 to 0.0217 min-1. While at 250 rpm stirring speed k = 0.0113 min-1 to 0.0255 min-1. The optimal condition available in this study is 95oC with 250 rpm stirring speed so that it produces protein from 14.08% to 0.87%.Key words : Deproteination, chitin, reaction kinetics, ebi shrimp waste, FTIR analysis.
Sintesis Membran Ultrafiltrasi Selulosa Asetat Untuk Pengolahan Limbah Cair Mall: Variasi Waktu Penguapan Liona Margarita Siahaan; Jhon Armedi Pinem; Idral Amri
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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Membrane is a thin layer, a barrier between two phases that are semipermeable, and serves as a selective separation media. In this research, membrane was prepared from cellulose acetate by phase inversion method. The purpose of this research was to determine the effect of solvent evaporation time to the performance of membranes asymmetry in the production of membranes for waste water treatment mall. Membrane prepared with variation of solvent evaporation time of 25, 45 and 65 seconds and operating pressure of 1, 3 and 5 bars. Characterization of the membrane is covering flux, rejection, SEM (Scanning Electron Microscopy), FTIR (Fourier Transform Infrared) and tensile strength. The results of SEM analysis showed all the membranes that are formed has an asymmetric structure. The results of FTIR analysis showed the absence of acetone solvent, acid formic and MSG in membrane. This research produed porous membrane and it had asymmetric structure.Key words : asymmetric membrane, mall, ultrafiltration and evaporation time
Aplikasi Shrinking Core Model Pada Sintesis Hidroksiapatit Dari Kulit Kerang Darah (Anadara Granosa) Dengan Menggunakan Metode Hidrotermal Suhu Rendah Ervina Ervina; Ahmad Fadli; Idral Amri
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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Hydroxyapatite (HA) is a ceramic material that can be used as bone and dental implants. Hydroxyapatite can be synthesized from the cockle shell (Anadara granosa). The purpose of this study was to determine the effect of time and stirring rate on the characteristics of HA using a low temperature hydrothermal method as well as decide of the kinetics model with the approach of shrinking core models. There are 3 models that are used, namely diffusion through the liquid film control, diffusion through the layer results (HA) control, and chemical reaction control. Research procedures initiated by the reaction of 36.9 g NH4H2PO4 dissolved in 600 mL of water were then added as much as 39.37 g CaO at stirring rate of 100 rpm, 200 rpm, 300 rpm and reaction time of 5 minutes to 150 minutes. The mixture was reacted at a temperature of 90˚C to form a paste. The paste was dried in an oven at 120˚C for 12 hours and calcined at a temperature of 900˚C for 1 hour. The results showed that the product formed is 95% fraction massa of HA. Kinetics model that describes the events of the synthesis of HA for belong to model 2, i.e diffusion through the layer results (HA) control with the smallest error percentage of 16.15 % with the formula:Keywords: cockle shell, hydrothermal, hydroxiapatite, kinetics model, shrinking core model
Sintesis Komposit Fe3O4/Hidroksiapatit Menggunakan Metode Kopresipitasi Dengan Variasi Suhu Sintering Dan Penambahan Fe3O4 Dion Julio Iskandar; Ahmad Fadli; Idral Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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Magnetite/Hydroxyapatite composite is one of the media as drug carrier for a drug delivery system. The purpose of this research is synthesis of the composite, and analysing the effect of percentage of Fe and sintering temperature to the characteristic of the composite. The powder of magnetite was dispersed in 100 ml of aquadest and mixed with 33,7 mmol Ca(NO3)2.4H2O for 15 minutes, and 20 mmol (NH4)2HPO4 added to the suspense. The pH of suspension was controlled by added NH4OH 25% until pH 11 and left for reacting for 120 minutes at 90ºC. The suspension was aged for 1 day, washed and then the precipitate was separated from the suspense. The precipitate was dried for 1 day at 90ºC and ended with sintering the precipitate for 2 hours at variable temperature until powder of composite was collected. The powder of composite was characterized with XRD, VSM and FESEM. The increase of sintering temperature from 400ºC to 800ºC affecting the sample crystallinity from 14,22% to 22,55% and the magnetic saturation value from 17,2 emu/g to 4,0 emu/g. Based on the resulted from characterized of the composite, concluded that the synthesis of composite magnetite/hydroxyapatite were succeeded.Keywords :drug carrier, hydroxyapatite, composite, magnetite, coprecipitation
Pengaruh Kuat Arus Dan Laju Alir Pada Pengolahan Air Payau Menjadi Air Bersih Dengan Metode Elektrokoagulasi Menggunakan Reaktor Listrik Kontinyu Jhon Alperdo; Idral Amri; Drastinawati Drastinawati
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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Brackish water was a usual the result of saltwater intrusion to the groundwater. It is due to the environmental degradation. Brackish water containing high levels of metal pollution like Fe, Cl, Mn, Zn, etc. Brackish water also usually having high levels of TDS and pH values brackish water acidic.Therefore, brackish water should be treated first that fit for using as fresh water. Brackish water treatment plant run based on the electrocoagulation. This method has the potential to purify brackish water and decrease the metal content contained such as Fe without the addition of coagulants. The purpose of this study was to determine the application of electrocoagulation to be used to neutralize pH, and reduce levels of TDS and Fe on brackish water and also to determine the effect of changes in flow rate and current to neutralize pH, and reduce TDS and Fe levels in brackish water. The parameters tested included pH, TDS (Total Dissolved Solid), and Fe using AAS. The electrocoagulation process uses electrical power that flows in the direction of the electrode. The electrocoagulation reactor was paired with a cable connected to the power supply then connected to an electric current with variations currents (1,4 ;2 ; 2,6 A) and variations in flow rate (0,53 ; 1,15 ; 2,7 L/min). The results of this study found that the optimum conditions were obtained at current of 2,6 A and flow rates of 0,53L/min with increasing pH from 5,8 to 6,8, decreasing TDS from 480 to 295 mg/L, Fe decrease of 66,97% from 0,5971mg/L to 0,1972 mg/L. Therefore, based on the results of parameter being tested, brackish water processed with electrocoagulation using continuous electric reactor is in line with the portable water quality standards based on Permenkes RI No.492-2010.Keywords: Brackish water, current, electrocoagulation, flow rate
Studi Kajian Pembuatan Asam Oksalat Dengan Variasi Kecepatan Pengadukan Dan Lama Waktu Pengadukan Dari Bahan Dasar Ampas Tebu Afriandi Afriandi; Fajril Akbar; Idral Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Bagasse is a by product from the processing of sugar cane into sugar. The growing number of bagasse quantitatively into environmental problems that require attention and special handling. The purpose of this research was conducted to study the effect of stirring speed variation and stirring time. Bagasse was reduced in size to 40 mesh, then added 250 ml of 4 N NaOH solution and stirred at a speed of 300 rpm for 20 minutes, after which the samples were heated in an oven at a temperature of 180 0C for 75 minutes, then the samples are removed and added to hot water ± 150 ml, then filtered and washed until the filtrate is clear. Samples added CaCl2 10% solution of 250 ml until the precipitate formed is then filtered, then the precipitate was dissolved by H2SO4 2 M, then filtered and washed using 96% ethanol as much as 15 ml. The filtrate heated using a water bath at a temperature of 70 0C ± 1 hr, then the filtrate cooled to oxalic acid precipitation in the form of white crystals. Results obtained was purified by recrystallization process using ethanol 96%. The crystals that formed were analyzed qualitatively and quantitatively, the qualitative analysis carried out by the test Fourier Transform Infrared Spectroscopy (FTIR), while the quantitative analysis conducted by test melting point of the Melting Point Apparatus and calculate yield. Based on the research that has been done obtained yield (%) highest oxalic acid at stirring speed of 600 rpm and a stirring time of 50 minutes long as many as 0.92 grams, with a yield (%) of 6.133%.Keywords : Bagasse, calcium chloride, oxalic acid, sodium hydroxide, sulfate acid
Co-Authors Adam Fadillah ADITYA NUGRAHA Afriandi Afriandi Ahmad Fadli Angga Dwina Putra Aris Aprianto Cahyono Bahruddin Dion Julio Iskandar Drastinawati Drastinawati Dwi Yerlis Rahmi Ervina Ervina Ewith Riska Rachma Fajril Akbar Gery Azhari Putera Hendriadi Siregar Hermana Setti Tarigan Inka Novela Irdoni HS Irdoni Irdoni Jhon Alperdo Jhon Armedi Pinem Liona Margarita Siahaan Marina Marina Mutia Yuli Rahmawati Nirwana Nirwana Onil Andika Reza Andreano D Ridho Wijaya Riski Adi Mulia Silvia Reni Yenti SYAIFUL BAHRI Yusnimar Yusnimar