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Pengaruh Jenis Pengaduk Dan Waktu Fermentasi Terhadap Fermentasi Nira Nipah Menjadi Bioetanol Menggunakan Yeast Saccharomyces Cereviceae Nst, Khoirul Amru; Chairul, Chairul; S, Maria Peratenta
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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Bioethanol is a chemical that is produced from plant raw materials containing starch, sugar and cellulose through a process of fermentation and distillation is an alternative fuelthat is environmentally friendly and renewable nature. One of the raw materials for bioethanol production are Nypa sap. Availability of land wide enough Nypa in Indonesia (700,000 ha) as well as a fairly high sugar content (18-19%) makes the Nypa sap is a potential to be processed into bioethanol. Flow patterns and the degree of turbulence is an important aspect that affects the quality of mixing is dependent on several factors such as the geometry of the tank, the physical properties of the fluid and the Impeller. Fermentation time very big influence on the activity of yeast because the longer the fermentation, the more the number increasingly active yeast or yeast to proliferate. The purpose of the study to convert the sugar in the Nypa sap is fermented into bioethanol and observe the effect of impeller and fermentation time on ethanol produced using Sacharomyces cereviceae. Through the process of fermentation using yeast Sacharomyces cereviceae, glucose is converted into ethanol and carbon dioxide. Preparation is done with the starter yeast inoculum Sacharomyces cereviceae at 10% so that the yeast fermentation medium is able to adapt and ready to ferment. Fermentation takes place in batches with a volume of 2 liters of fermentation medium, variations impeller Paddle, Pitched Blade Turbine, Disc Turbine and variations of fermentation time 24, 36, 48, 60 and 72 hours. Stirring speed of 150 rpm and temperature of fermentation at room temperature (25 - 300C). Ethanol concentration was analyzed by using Gas Chromatography. The optimum fermentation process is shown on the Impeller Pitched Blade Turbine fermentation time of 48 hours with yield obtained 89,86% and ethanol concentrations obtained 10.72% (v / v) or 84.60 mg / ml.Keywords: Bioethanol, Nypa Sap, Saccharomyces Cerevisiae, Impeller, Flow Pattern.

Penentuan Suhu Dan Waktu Optimum Pada Tahap D0 (Delignifikasi Pertama) Proses Bleaching Pembuatan Pulp Silaban, Kardiman; Chairul, Chairul; Sembiring, Maria Peratenta
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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PT. Riau Andalan Pulp and Paper (RAPP) is a company has produced pulp and paper with Elemental Clorine Free (ECF) system in bleaching pulp stage. PT. RAPP used four process bleaching stage of pulp that’s D0 – EP - D1 – D2. Using clorine dioxide (ClO2) as bleaching pruff but EP stage were lignin extract process using oxygen and sodium dioxide (NaOH). One of the important thing in bleaching pulp is D0 stage process. For producing high quality pulp, one of important pruff must be recheck is temperature and time of bleaching pulp. The purpose of research was knowing effect of temperature in cooking timeof the first bleaching pulp stage process with accasia to quality pulp and economic value. Result of research to be used with get variation bleaching time 60, 70, 80, 90, 100 and 120 minutes and get variation bleaching temperature 65, 75, 80, and 90 (0C). in 650C and 60 minutes brightness was produced higher than else that is 66.42% ISO.

PEMBUATAN KOMPOS DARI LIMBAH PADAT (SLUDGE) PABRIK PULP DAN PAPER Sembiring, Maria Peratenta; Irianty, Rozanna Sri
Jurnal Riset Kimia Vol 5, No 2 (2012): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v5i2.213

One of the method to use pulp and paper mill sludge was convert it become a compost. This research result showed that time variation of compost have different physical and organic matter properties. In physical properties, 3 months of compost had 12.57% moisture content, while organic matter contain 10.56% carbon, 1.07% nitrogen, and 9.87 C/N ratio. For 4 months compost had 6.79% moisture content, 11.88% carbon, 0.91% nitrogen, and 13.05 C/N ratio. Nutrients content from both composts appropriate with the standard value of National Standarisation Body.

PENGARUH KONSENTRASI INHIBITOR EKSTRAK DAUN GAMBIR DENGAN PELARUT ETANOL-AIR TERHADAP LAJU KOROSI BESI PADA AIR LAUT Irianty, Rozanna Sri; Sembiring, Maria Peratenta
Jurnal Riset Kimia Vol 5, No 2 (2012): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v5i2.218

The important properties to overcome the corrosion are safe, available, biodegradable, low cost, and environmental friendly. Gambier leaves extract is one of the inhibitor that have environmental friendly properties. This study aims to determine the effectiveness of extract using ethanol-water to reduce the corrosion rate. Soaking of ferrous iron plate samples in seawater media have done for corrosion test. Agitator and aerator motors at turn-on and conducted a series of immersion with varying contact time 5, 10, 15, and 20 days. After the time up next ferrous iron plate samples were cleaned, dried, and weighed. Experiment was repeated by adding a inhibitor heavy leaves gambier extract with varying leaves gambier extract, 1000, 3000, and 5000 ppm. Soaking iron plate samples performed at varying pH at 3(acid), 6 (netral), and 9 (alkaline). Calculation is then performed and the rate of corrosion inhibition efficiency gambier leaves extract with ethanol-water solvent. On the immersion of iron plate without inhibitor, the result that the longer the contact time, the weight of the iron plate was reduced. The results showed the addition of inhibitors of leaves extract gambier with ethanol-water solvent into the corrosive media can reduce the rate of corrosion. Inhibitor of leaves extract gambier using ethanol-water solvent effective to reduce the rate of corrosion inhibitor at a concentration of 5000 ppm and contact time of 20 days with the lowest value of the corrosion rate is 0.000503 g/cm2 days in seawater media at initial pH 7.9. Gambier extracts gave greatest inhibition efficiency about 60.345% obtained at a concentration of 5000 ppm inhibitor and 20 days contact time.

ANALISA UNSUR HARA MIKRO DARI FLY ASH LIMBAH INDUSTRI PULP DAN KERTAS Maria Peratenta Sembiring; Chairul Chairul; Zulfansyah Zulfansyah
Jurnal Analis Laboratorium Medik Vol 6 No 1 (2021): JURNAL ANALIS LABORATORIUM MEDIK
Publisher : UNIVERSITAS SARI MUTIARA INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51544/jalm.v6i1.1929

The pulp and paper industry continues to grow and produces large amounts of fly ash waste from the biomass combustion process. Alternative waste management besides landfills needs to be developed so that the use of fly ash can be ecologically and economically acceptable, such as for land applications in industrial plantations, especially on peat soils. This paper presents the results of the analysis of micro nutrients from fly ash from pulp and paper mill waste that can be used for agriculture and forestry. The elemental content of boron (B) and zinc (Zn) can be detected in fly ash samples both by lauryl amine extraction and stearyl amine extraction, where the optimum amount is obtained using 15 gram of fatty amine and n-hexane solvent with a processing time of 4 hours. Stearyl amine gives a higher yield than lauryl amine because it has a longer saturated carbon chain.

PEMBUATAN KOMPOS DARI LIMBAH PADAT (SLUDGE) PABRIK PULP DAN PAPER Maria Peratenta Sembiring; Rozanna Sri Irianty
Jurnal Riset Kimia Vol. 5 No. 2 (2012): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v5i2.213

One of the method to use pulp and paper mill sludge was convert it become a compost. This research result showed that time variation of compost have different physical and organic matter properties. In physical properties, 3 months of compost had 12.57% moisture content, while organic matter contain 10.56% carbon, 1.07% nitrogen, and 9.87 C/N ratio. For 4 months compost had 6.79% moisture content, 11.88% carbon, 0.91% nitrogen, and 13.05 C/N ratio. Nutrients content from both composts appropriate with the standard value of National Standarisation Body.

PENGARUH KONSENTRASI INHIBITOR EKSTRAK DAUN GAMBIR DENGAN PELARUT ETANOL-AIR TERHADAP LAJU KOROSI BESI PADA AIR LAUT Rozanna Sri Irianty; Maria Peratenta Sembiring
Jurnal Riset Kimia Vol. 5 No. 2 (2012): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v5i2.218

The important properties to overcome the corrosion are safe, available, biodegradable, low cost, and environmental friendly. Gambier leaves extract is one of the inhibitor that have environmental friendly properties. This study aims to determine the effectiveness of extract using ethanol-water to reduce the corrosion rate. Soaking of ferrous iron plate samples in seawater media have done for corrosion test. Agitator and aerator motors at turn-on and conducted a series of immersion with varying contact time 5, 10, 15, and 20 days. After the time up next ferrous iron plate samples were cleaned, dried, and weighed. Experiment was repeated by adding a inhibitor heavy leaves gambier extract with varying leaves gambier extract, 1000, 3000, and 5000 ppm. Soaking iron plate samples performed at varying pH at 3(acid), 6 (netral), and 9 (alkaline). Calculation is then performed and the rate of corrosion inhibition efficiency gambier leaves extract with ethanol-water solvent. On the immersion of iron plate without inhibitor, the result that the longer the contact time, the weight of the iron plate was reduced. The results showed the addition of inhibitors of leaves extract gambier with ethanol-water solvent into the corrosive media can reduce the rate of corrosion. Inhibitor of leaves extract gambier using ethanol-water solvent effective to reduce the rate of corrosion inhibitor at a concentration of 5000 ppm and contact time of 20 days with the lowest value of the corrosion rate is 0.000503 g/cm2 days in seawater media at initial pH 7.9. Gambier extracts gave greatest inhibition efficiency about 60.345% obtained at a concentration of 5000 ppm inhibitor and 20 days contact time.

Pembuatan Bioetanol Dari Nira Aren Secara Fermentasi Menggunakan Yeast Saccharomyces Cerevisiae Dengan Variasi Konsentrasi Inokulum Dan Waktu Fermentasi Elia Simanjuntak; Chairul Chairul; Maria Peratenta Sembiring
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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Bioethanol is one of the alternative energy source that can replace fossil energy sources. Bioethanol is biochemistry fluid from fermentation process of sugar by using microorganisms. One material which has potential as raw material for bioethanol production is a palm juice which is economically valuable products of the sugar plant. Palm juice is used as raw material for ethanol because it contains sugar which is large enough around 12.04%. This research aimed to produce bioethanol with various concentration of inoculum 10%, 12.5%, 15% and 17.5% and fermentation time 24, 48, 72 and 96 hours at pH optimum 5. The process of fermentation using Saccharomyces cerevisiae yeast. The sample analysed by using alcoholmeter. From the research results, obtained the highest ethanol concentration of 8% (v/v) at 17.5% inoculum concentration variation with fermentation time 72 hours.Keyword: Bioethanol, Fermentation, Palm Juice, Saccharomyces cerevisiae

Pengaruh Konsentrasi Chemical Agent (Detergen, NaOH) Dan Tekanan Trans-Membran Pada Pencucian Membran Dari Proses Pengolahan Air Gambut Secara Cross Flow Rahmi Ayuni Fuadi; Syarfi Daud; Maria Peratenta
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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Peat water is the kind of surface water that which widely available in the swampy area and lowlands that require more treatment so that can beclassified as a clean water and can be drunk. One of the alternative technology that can be used for peat water treating is membrane technology. The first challenge of the membrane technology is fouling. The purpose of this research is to learn the affectivity and efficiency of the cleaner materials likeNaOH and detergent in the regeneration process of ultrafiltration membrane at the peat water filtering operation. This research was done by using ultrafiltration membrane that the peat water as the feed. The used methodwas cross flow system with variations were pressing operation 1 bar and 1,5 bar and concentration of NaOH and detergent 1%, 1,5%, and 2%. The filtering process of peat water carried on for 120 minutes and the each cleaning time was 20 minutes. The highest of cleaning affectivity was reached 21,14% using detergent 2%. The highest of cleaning efficiency based on recovery flux was 84,88% and based on resistance removal was 21,09%.Key words : Cleaning affectivity, cleaning efficiency, peat water, ultrafiltration membrane

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

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