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Pengaruh Kecepatan Pengaduk Dan Waktu Fermentasi Terhadap Konsentrasi Bioetanol Pada Fermentasi Nira Nipah Kental Menggunakan Saccharomyces Cerevisiae Feri Wibowo; Chairul Chairul; Irdoni S
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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In Riau province the existence of palm is abundant. Nipah can potentially supply biofuels because Its sap has a sugar content of 15-20% which can be converted into bioethanol. Bioethanol is ethanol produced from raw materials containing starch, sugar and cellulose through a process of fermentation and distillation that can be used as an alternative fuel which is environmentally friendly and renewable. To be Able to produce bioethanol from nypa sap in a laboratory scale, it is necessary to study the manufacture of bioethanol from nypa sap through fermentation by using Sacharomyces cerevisiae fermentation medium volume of 2 liters. The objective of the research is to convert the sugar in the nypa sap through fermentation into bioethanol and to observe the effect of stirring speed, viscosity of the juice in the fermentation medium and fermentation time on bioethanol production using Sacharomyces cereviceae. Through the process of fermentation using yeast Sacharomyces cereviceae, glucose is converted into ethanol and carbon dioxide. Preparation starter was made with yeast inoculum process Sacharomyces cereviceae at 10% of the yeast fermentation medium, therefore it can be adaptable and ready for fermentation. Fermentation takes place in batches with a volume of 2 liters of fermentation medium, stirring speed variation of 150, 200, 250 rpm and viscosity sap by evaporation at 20% (v/v) as well as variations in the fermentation time of 24, 36, 48, 60 and 72 hours. Temperature fermentation at room temperatur is 25 – 30oC. Ethanol concentration was Analyzed by using Gas Chromatography. The optimum fermentation process is shown in the stirring speed of 200 rpm with sap viscosity of 20% (v/v) and fermentation hours 36th, therefore it was obtained 15,407% (v/v) or 121,604 mg/ml.Keywords: bioethanol, condensed sap, nypa sap, saccharomyces cerevisiae, stiriing speed.
Menentukan pH Optimum Di DO Stage Untuk Mengurangi Konsumsi CIO2 Pada Proses Pulp Bleaching Di PT. RAPP Winarto Tarigan; Chairul Chairul; Maria Peratenta Sembiring
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The process of bleaching is a chemical process that is used on chemically treated pulp and mechanical pulp aimed at increasing degrees of brightness according to the expected target. The purpose of the bleaching process are: increasing the brightness, maintaining brightness stability, removing dirt and unwanted components and maintain the physical strength of the pulp. Pulp bleaching process has several stages of the first delignification (D0), Extraction Peroxide (EP), and Last Delignification (D stage). There are few process variables having an effect on the bleaching process, one of which is pH.  At  first delignification process (D0) with the kappa factor 0.25, the process temperature  about 75 oC for 1 hour, the expected optimum  end pH is 3.5 to 4.0. In these conditions will produce pulp with 65.42% ISO brightness, and after going through the process of extraction Peroxide (EP) for 90 minutes will produce a pulp with a kappa number a low of 2.63. So after going through the process in Last Delignification (Dstage) will have the lowest consumption of chlorine dioxide. Overall pulp with a final pH Do stage 3.5 to 4.0 Chlorine dioxide is consumed as much as 133.6 ml. Keywords: pH, Bleaching, Chlorine Dioxide
Adsorpsi Ion Logam Pb Dengan Menggunakan Karbon Aktif Kulit Durian Yang Teraktivasi Nuvicha Rizqi Yuniva Zikra; Chairul Chairul; Silvia Reni Yenti
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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Lead (Pb) is purified so widely used by humans in a variety of activities. Environmental pollution by lead (Pb), mostly from human activities are extracting and exploiting these metals. One way to prevent environmental contamination that is the technique of adsorption using activated carbon from durian skin. Manufacture of activated carbon durian skin consists of sample preparation process, carbonization, activation with KOH, washing and sieving. Activated carbon durian skin with carbonization temperature 3200C for 2 hours, the activation is done by calcination at a temperature of 400oC for 2 hours with 0.1 N KOH activator and activated carbon filtration with a sieve size of 60, 80 and 100 mesh. From research conducted activated carbon has met the quality standards of quality according to SNI 06-3730-1995 activated carbon with a water concentration of 7.4%, 6.76% ash concentration, as well as the absorption of I2 solution of 576.95 mg/g. Activated carbon works very well in absorbing Pb where the sample was stirred with a speed of 140 rpm using the batch system. The contact time used after mixing is 60, 90 and 120 minutes. The size of the activated carbon from durian skin best for the entrapment of Pb is 100 mesh and 120 minutes contact time with the adsorbent adsorption efficiency reached 90.68%.Keywords: durian skin, adsorption, activated carbon, lead (Pb)
Produksi Etanol Dari Limbah Kulit Nanas Dengan Metode Solid State Fermentation (SSF) Terhadap Variasi Waktu Dan Variasi Ukuran Partikel Substrat Reni Oktaviani; Chairul Chairul; Said Zul Amraini
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Solid State Fermentation (SSF) is a form of solid substrate fermentation with low humidity levels. This study aims to determine the maximum time of the fermentation process to produce ethanol with SSF method and studying the kinetics of cell growth of Zymomonas mobilis for variations in particle size of the substrate. Pineapple peel waste is used as a raw material with a variety particle size of substrate in the form of slurry, 1x1 cm and 2x2 cm. Time of fermentation sampling conducted in 6; 12; 18; 24, 30, and 36 hours. Environmental conditions Zymomonas mobilis growth adjusted to pH 5 and 30 ° C. Analysis carried out in the study is the analysis of ethanol content using alcoholmeter and calculation of the number of cells by turbidity method using UV spectrophotometer to determine the kinetics of cell growth of Zymomonas mobilis. The maximum time obtained in this study was 24 hours for all particle size of the substrate. In  fermentation process with the SSF method, the kinetics of cell growth of Zymomonas mobilis and ethanol concentration is influenced by the particle size of the substrate. The highest ethanol concentrations obtained was 33% V on substrate particle size slurry with maximum specific growth rate  0,43/hour Keyword : Fermentation, Solid State Fermentaton (SSF), Zymomonas mobilis, Pineapple peel, kinetics cell, ethanol
Pengaruh Kosentrasi NaOH Dan Jumlah Grafena Oksida Pada Geopolimer Berbasis Limbah Fly Ash Pabrik Kelapa Sawit Gilang Fathurrahman; Amun Amri; Chairul Chairul
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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Geopolymers are the result of synthesizing inorganic polymers by reacting high concentrated alkali solutions with Si and Al minerals contained in fly ash. The use of these geopolymers can reduce consumption levels of OPC use in the construction industry. This study aims to create geopolymer based fly ash palm mill with the addition of graphene oxide as filler and Determine the effect of NaOH concentration and the amount of grafena oxide addition to geopolymer compressive properties as well as to study the morphological and physical-chemical structure in geopolymer. Geo-polymer preparation includes several steps of fly ash and sand preparation and then continued by making alkali activator solution (NaOH + Sodium silicate) with 6 M, 10 M and 14 M variations and grafena oxide addition with 0%, 0.2% wt, 0.4% wt, and 0.6% wt. The results showed that the highest compressive strength on the addition of NaOH concentration of 14 M and the addition of 0.6% wt of oxena oxide is 13.2 Mpa on and the lowest compressive strength is produced at the concentration of NaOH 6 M and without the addition of GO that is 5.1 Mpa. This study shows that the addition of graphene oxide can increase the compressive strength of the geopolymer and NaOH as an alkaline solution can reduce the GO sheet into rGO sheets and create an increasingly denser geopolymer structure as the NaOH concentration increases.Key words : Geopolymer, Fly Ash, Graphene Oxide
Pembuatan Bioetanol Dari Nira Nipah Dengan Penambahan Tween 80 Dan Ergosterol Pada Proses Fermentasi Menggunakan Sacharomyces Cereviceae Mohammad Rezky; Chairul Chairul; Irdoni Irdoni
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
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Nypah  sap is one of potential materials  it’s  processed into bioethanol. Availability of nypah palm land in Indonesia and a fairly high sugar content (15-20%) makes nipa sap has the potential  it’s processed into bioethanol. Ergosterol is an essetial component of yeast cells that maintains the integrity of the membrane. It’s  invetigated as an important factor the ethanol tolerance of yeast cells. Ethanol and hypoxia were found to have negative and synergistic effects on the total ergosterol contents of both strains and  it’s  significantly reduce the free ergosterol. Effect of a surfactant Tween 80 on the bacterial for growth, increase the glucose consumption rate at the later stage of the fermentation, maintain the intact structure of  yeast S. Cereviceae.  Preparation  started  by the  yeast S. Cereviceae inoculum in the 10% of fermentation medium so that yeast an  able to  adapt and ready for fermentation.  Fermentation  place  taked in batches with  volume of 2  liters  of fermentation medium, variations in the tween 80 and ergosterol and variations of fermentation at time 24, 36, 48, 60 dan 72 hours and then concentration of yeast 4 g/l. The stirring speed in 200 rpm and  temperature of fermentation at room temperature (25-300 C)it’s  selected conditions. Bioethanol concentrations has been analyzed by used  gas kromatografi. The process of fermentation optimum conditions indicated in the addition of tween 80 10 ml and ergosterol 1 gram    at the time of 72  hours having the initial sugar concentration of 161,81  mg/ml. concentration Bioethanol obtained in this condition at 20,47% (v/v). Keywords: Ergosterol, Nipa sap, Saccharomyces cerevisiae, Tween 80.
Konversi Limbah Padat Sagu Menjadi Bioetanol Dengan Proses Hydrolysis Dan Fermentasi Menggunakan Saccharomyces Cerevisiae Adriani Lestari; Chairul Chairul; Sunarno Sunarno
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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The high reliance on fossil fuels such as crude oil, coal, and gas - causes exhaution on fossil resources ( crude oil, natural gas, and coal). Therefore, to resolve the fossil-fuel dependency, sago solid waste is converted into bioethanol as the renewable energy. On this research, the process of sago pulp fermentation is done by hydrolysis process and fermentation with the use of Saccharomyces cerevisiae as the yeast. The aim of this research is to determine the effect of temperature and time on the hydrolysis process producing glucose and to study the glucose fermentation from hydrolysis into bioethanol from Saccharomyces cerevisae. The hydrolysis process produced glucose with of time of 60 minutes and temperature of 125oC, 135oC and 1450C. Fermentation was done in 2L fermentors for 5 days. The sulfuric acid hydrolysis increases bioethanol levels from sago pulp. The higher the temperature with the increasing time of the process, the higher the glucose concentration will be resulted. The highest glucose was obtained at a temperature of 145 with 60 minutes time which is 24.20 g / L. Sago pulp fermentation process produced a maximum condition at 96-hour fermentation with bioethanol levels of 13%. Keywords: bioethanol, hydrolysis, sago, saccharomyces cerevisiae, fermentation
Pengaruh Laju Pengadukan Terhadap Biokonversi Reject Nanas Menjadi Bioetanol Intan Oktaviani; Adrianto Ahmad; Chairul Chairul
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 1 (2015): Wisuda Februari Tahun 2015
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Bioethanol production can be done by a process of fermentation material containing glucose, cellulose fiber and starch. Pineapple is one of the ingredients containing glucose. This study produces bioethanol from reject pineapple juice. The purpose of this study to determine the effect of stirring rate on bioethanol yield and to get the best conditions in the manufacture of bioethanol made from pineapple juice reject. There are several stages in the research, the preparation of raw materials, fermentation, and purification products. The variables used are the stirring speed in the process of fermentation: 100, 150, 200, 250, and 300 rpm with fermentation time 12, 24, 36, 48, 72, 84, 96, 108 and 120 hours. Anaerobic fermentation process takes place with the help of the yeast Saccharomyces cerevisiae with the addition of some nutrients. To measure the ethanol formed, the purification process is carried out using a rotary evaporator. The results showed that the highest ethanol content of 10% v/v with yield of 95.32% obtained at the stirring rate of 200 rpm with a fermentation time of 60 hours.Keywords: Bioethanol, Reject pineapple, Stirring, Saccharomyces cerevisiae.
Degradasi Zat Warna Artifisial Limbah Tekstil Dengan Advanced Oxidation Processes Menggunakan Katalis Nanopartikel Ce/Karbon Farhiz Lagan; Edy Saputra; Chairul Chairul
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
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One of the innovation textile waste processing is advance oxidation processes using peroxymonosulfate and catalyst nanoparticle Ce/carbon. This study was aimed to decrease content of artificial dye waste and determined the optimum conditions by using catalyst nanoparticle Ce/carbon. Catalyst synthesis was processed in hydrothermal autoclave at temperature 1800C for 18 hours, it convert D-glucose into black carbon, then impregnated with catalyst metal Ce by 3% and 5% by weight, after that catalyst calcined by N2 at temperature 5000C for 4 hours. Adsorption of artificial dye textile waste was held 25 ppm for 2 hours with concentration of catalyst 0,4 gr/L. The optimum adsorption of artificial dye textile waste with catalyst concentration 0,4 gr/L was is 12,921 with adsorption percentage reached 48,32%.Keyword: advanced oxidation processes, nanopartikel Ce/carbon, dye
Pengaruh Gelombang Mikro Pada Pretreatment Tongkol Jagung Menjadi Bioetanol Imron Sutiono; Chairul Chairul; Yelmida Yelmida
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
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Oil production is predicted  decreasing until 20 billion barrels in  2050. The decreasing of oil production will cause efforts to find alternative renewable and   friendly source energy. The one of alternative energy is bioetanol that produced from biomass waste. The Micro wace radiation will give to corn cob as a pretreatment process in this research. Micro wave is expected to break lignin structure in order to get the optimum of etanol. The purpose of the research is to know the effect of micro wave in the pretreatment of corn cob. The corn cob will radiate  on 180 watt through micro wave  with time variation 2,4,6,8 dan 10 minutes, then continued with hidrolisis process using dilute H2SO4 and fermentation process using Saccharomyces cerevisiae. The result of fermentation will analyzed  with Guymon method by using alcoholmeter. The results indicate the highest concentration of bioetanol that  get  from this fermentation process up to 2,5% (25g/l) during 24 hours for the variation micro wave radiation in 6 minutes. The optimum Yield of bioetanol up to 23,67%. The longer time fermentation process and the longer radiation of microwave that is done in this research show that there is no increasing the concentration of bioetanol that we get.  Key word : bioetanol. Microwave, corn cob, Saccharomyces Cerevisiae
Co-Authors Achmad Noerkhaerin Putra Ade Ayu Oksari Ade Sri Umaiyah Adriani Lestari Adrianto Ahmad Ahmad Dedi Fadillah Ahmad Mursyid Ajma Nouri Alfarisi, Cory Dian Alya Alissa Amun Amri ANDRIA AGUSTA Annisa Novianti Samin Anthoni Agustien Arfa Dinata Ageng Tirtayasya Cece R David Hamonangan Deasy Rahmayuni Desi Heltina Deswati Deswati Dewi Kusuma Nurmalasari Diah Pramushinta Dike Putra Ganda Dina Citra Naomi Dina Citra Naomi Harianja Dina Remina Drastinawati Drastinawati Efrizal Efrizal Eka Trisnawati Elia Simanjuntak Ella Awaltanova Erizal Mukhtar Evelyn Evelyn Fachry Abda El Rahman Farhiz Lagan Fariez Fariez Ferry Lismanto Syaiful Futhanul Wewe Gilang Fathurrahman Gusna Merina Hafidawati, Hafidawati Hauriah Hauriah I Gusti Bagus Wiksuana Ihsanul Khairi Iislamiyah Iislamiyah Imron Sutiono Indra Junaidi Zakaria Intan Oktaviani Irdoni HS Irdoni Irdoni Irdoni S Irvan Fadli Wanda Karim Abdullah Khaira Khaira M Ridwan Afitra Maria Peratenta Sembiring Maulia Rayana Mery Sukmiwati Mohammad Rezky Muhammad Rivai Multi Handriyani Nadhira Iffah Lisandra Nurainas Nurainas Nurmiati Nurmiati Nuvicha Rizqi Yuniva Zikra Oci Khairani Rafly Rafly Reni Kuswanazia Rian Efrizal Riki Ariyadi Riki Irwandi Rizka Sefmaliza Roni Roni Rusnam Rusnam Said Said Shintia Oktaviani Silvia Reni Yenti Sisi Oktadira Kalpatari Sri Budi Sulianti Sri Meilani Sri Rezeki Muria Sunarno Sunarno Suwirmen, Suwirmen Syafira Junia Ardhani SYAIFUL BAHRI Syamsiar, Syamsiar Syelvia Putri Utami Tafrikhatul Walidah Tantri Wilinda Julia Tiara Tiara Tri Murningsih Wahyu Mey Riswanto Winarto Tarigan Wisrayetti Wisrayetti Yelmida Azis Yeni Rizki Yolanda Amalia YULIASRI JAMAL Yuthia Aulia Riani ZA ZA Zozy Aneloi Noli Zuherti Zainul Zuhri Syam