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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Ilmiah Biosaintropis (Bioscience-Tropic)
Wisrayetti Wisrayetti
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Agriculture, Biological Sciences & Forestry Engineering Environmental Science

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Pengaruh Berat Katalis Dan Perlakuan Aktivasi Katalis Lempung Terhadap Pembuatan Biodiesel Dari Minyak Nyamplung Fathiyah Zulfahni; Syaiful Bahri; Wisrayetti Wisrayetti
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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Abstract

This study aims to produce biodiesel from callophylum oil by using heterogeneous clay catalyst from Palas village. Characteristic of clay catalyst for biodiesel synthesis that will be analyzed in this research such as Si/Al ratio, surface area and pore size. Clay catalyst is made by grinding the clay until its size -100 +200 mesh. Clay was activated using H2SO4 solution with variation of the concentration 0,5 N, 1 N and 2 N. The mixture is filtered using a vacuum pump and calcined at 300 ºC for 3 hours. The producing of biodiesel through two stages: esterification and transesterification. In transesterification, clay catalyst is used having variation of catalyst weight was 0,1%, 0,5% and 1%, sample of oil 50 gram and ratio oil and methanol 1:9. The reaction lasted for 60 minutes at 60 ºC. The largest biodiesel yield on the use of 1% clay catalyst with variation of acid 1 N i.e. 89,50%. Characteristics of catalyst has a high Si/Al and a surface area ratio respectively 25,74 and 37,641 m2/gr, and pores are scattered on the surface. Biodiesel produced in accordance with predefined standards (SNI 7128:2015).Keywords: biodiesel, callophylum oil, Palas clay, transesterification.
Pengaruh Konsentrasi Ammonium Sulfat Dan Waktu Pada Fermentasi Pulp Kakao Menjadi Bioetanol Menggunakan Saccharomyces Cerevisiae Yuthia Aulia Riani; Chairul Chairul; Wisrayetti Wisrayetti
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 renewable alternative energy source that can be used as an alternative fuel. Bioethanol can be produced from plant containing starch, sugar, and cellulose through a process of fermentation. One of material can be potential as bioethanol feedstock is cocoa pulp that has glucose content 8-14%. The aim of this research was studying the effect of ammonium sulfate concentration as nitrogen source and fermentation time to process cocoa pulp fermentation to produce bioethanol. The steps of this research comprise preparation of fermentation medium, making inokulum of yeast Saccaromycess cerevisiae, and fermentation step. This study varied of ammonium sulfate concentration 0 g/l, 1 g/l, 2 g/l, and 3 g/l and fermentation time of 24, 36, 48, 60, 72, 84, and 96 hours at pH 5, temperature of 30oC, and inokulum size 10% (v/v). Bioethanol concentration was analyzed by using alcoholmeter and glucose concentration was analyzed by Nelson Somogyi method. The fermentation result of cocoa pulp with glucose content of 124,234 mg/ml was showed that the highest bioethanol concentration was 7% or 55,251 mg/ml for using ammonium sulfate of 2 g/l and fermentation time of 72 hours.Keywords: Ammonium Sulfate, Bioethanol, Cocoa Pulp, Fermentation, Saccaromycess cerevisiae
Sintesis Surfaktan Metil Ester Sulfonat (MES) Dari Palm Oil Metyhl Ester (POME) Dan Natrium Bisulfit (NaHSO3) Dengan Variasi Waktu Sulfonasi Dan Rasio Mol Pome : NaHSO3 Rino Hasanatul Isra; Syaiful Bahri; Wisrayetti Wisrayetti
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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Methyl Ester Sulfonate (MES) is an anionic surfactant which is currently being developed. These surfactants can be produced from palm oil methyl ester. MES produced from sulfonation reaction with addition of sulfonation agents. MES can be synthesized from Palm Oil Methyl Ester (POME) and Sodium Bisulfite (NaHSO3) as the sulfonation agent with Calcium Oxide as the catalyst. The aims of this research are to determine the characteristic of the product, and to determine the effects of temperature and mole ratio of the product produced. Sulfonation process was carry out at the time of 5, 7, 9 hours, the mole ratio of 1:1, 1:1,5, 1:2, the stirring speed of 450 rpm, and the temperature of 80 oC. Then purification of the MES surfactant and product analysis is carried out. The best characteristic of the MES is at time 7 hours and mole ratio 1:2 with the density of 0,943 gr/ml, the viscosity of 2,1027 cP, the pH of 3,53, the surface tension of 33,95 dyne/cm, the interfacial tension of 28,85 dyne/cm, the emulsion stability of 89%, and the yield of 83,45%. The surface tension is accordance to the commercial MES.Keyword : Methyl Ester, Methyl Ester Sulfonate, Sulfonation, Surfactant.
Pengaruh Konsentrasi Asam Terhadap Aktivasi Lempung Palas Dan Aplikasinya Sebagai Katalis Pada Pembuatan Biodiesel Dari Minyak Nyamplung Dengan Variasi Kecepatan Pengadukan Renia Navivin; Syaiful Bahri; Wisrayetti Wisrayetti
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 study aims to produce biodiesel from calophyllum oil using acid-activated heterogene clay catalyst, determining catalyst and biodiesel characteristics and determining the selectivity of clay catalyst. The clay catalyst is prepared by grinding clay soil that has been dried to a size of -100 + 200 mesh, then clay is activated using H2SO4 0.5 N, 1 N and 2N solution. Then filtered using a vacuum pump. The solids are then calcined at 300ºC. The process of making biodiesel is carried out through two stages: esterification and transesterification, in transesterification process of stirring speed variation of 200 rpm, 300 rpm, 400 rpm, with catalyst weight of 3% by weight of oil, calophyllum oil sample weight 80 grams and methanol with ratio of oil to methanol 1: 12 is introduced into the transesterification reactor, the reaction lasting for 120 minutes at 60 ° C. This study yielded the largest biodiesel yield on 2 N activated acid catalyst with 400 rpm mixing speed velocity of 78.4%. Characteristics of the catalyst that has a surface area and ratio of Si / Al is large enough.Keywords: biodiesel, calophyllum, clay, transesterification.
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 Chairul Chairul Cory Dian Alfarisi Drastinawati Drastinawati Fathiyah Zulfahni Nurfatihayati Nurfatihayati Padil Padil Renia Navivin Rino Hasanatul Isra SYAIFUL BAHRI Yelmida Azis Yuthia Aulia Riani