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All Journal Jurnal Penelitian dan Pengembangan Pendidikan Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Jurnal Teknik ALGORITMA : Journal of Mathematics Education Jurnal Ilmiah Pendidikan Matematika Al Qalasadi Jurnal Serunai Bahasa Indonesia Unri Conference Series: Community Engagement Asimetris: Pendidikan Matematika dan Sains Journal of Bioprocess Chemical and Environmental Engineering Science International Journal of Economic, Business, Accounting, Agriculture Management and Sharia Administration (IJEBAS) As-Sidanah : Jurnal Pengabdian Masyarakat Jurnal Transformasi Administrasi Catimore: Jurnal Pengabdian Kepada Masyarakat Jumper : Journal of Educational Multidisciplinary Research International Conference on Health Science, Green Economics, Educational Review and Technology (IHERT) Jurnal Teknologi & Rekayasa Sipil Jurnal Infinity JURNAL REKAYASA KIMIA & LINGKUNGAN
Edy Saputra
STAIN Teungku Dirundeng Meulaboh
Religion 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 Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Sintesis Biodiesel Dari Minyak Nyamplung Menggunakan Katalis Geopolimer: Pengaruh Suhu Reaksi Transesterifikasi Dan Rasio Mol Minyak Terhadap Metanol Syafi’i, Abdullah; Saputra, Edy; Helwani, Zuchra
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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Abstract

Petroleum reserves in Indonesia are increasingly depleted, requiring the use of alternative energy that is environmentally friendly and renewable like biodiesel. Biodiesel can be made by transesterification process of vegetable oils. Process of making biodiesel commonly use homogeneous catalyst which has the disadvantage the formation of by products such as complexity of the separation of catalyst. Therefore, in this study biodiesel was synthesized from calophyllum inophyllum oil by using geopolymer catalyst. Geopolymer catalyst is first synthesized by reacting sodium silicate, metakaolin, NaOH, and water. Several variations of the process variables were done to assess its influence on yield of biodiesel. The variables were used consist of a dependent variables and independent variables. The dependent variables were calophyllum inophyllum oil weight of 50 grams, 3%-wt of catalyst concentration, reaction time of 120 minutes, and stirring speed of 400 rpm, while the independent variables which variation molar ratio of oil:methanol 1:6 and 1:9 and variations of temperature 55 and 65 oC. Physical characterization were done including density 871 kg/m3, kinematic viscosity 4.38 mm2/s, acid number 0.41 mg-KOH/g biodiesel and flash point 140°C respectively accordance with the standards of Indonesian biodiesel (SNI 7182:2015).Keywords: biodiesel, catalyst, calophyllum inophyllum oil, geopolymer, yield
Sintesis ZSM-5 Menggunakan Silika Presipitasi Dari Fly Ash Pabrik CPO Saputra, Rio; Saputra, Edy; Yelmida, Yelmida
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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Abstract

Palm fly ash is waste in the palm oil industry. Palm fly ash has high content of silica. ZSM-5 is one of synthetic zeolite which used as catalyst. It can be synthesized from silica and alumina using hidrothermal method. Source of silica that can be used to ZSM-5 synthesis are sodium silicate, gelled silica and precipitated silica. the purpose of this research is to synthesis ZSM-5 using precipitated silica hydrothermally. The result was analyzed using FTIR. ZSM-5 can be synthesized using precipitated silica hydrothermally. Based on infrared spectrum,the product synthesis shows four characteristic of ZSM-5 characters.Key words : fly ash, silica, hydrothermal and ZSM-5
Pengolahan Limbah Cair Sawit Dengan Metode Aop (Advanced Oxidation Process) Menggunakan Katalis LaMnO3 Perovskite Dan Oksidan Peroxymonosulfate Riandy, M Arief; Saputra, Edy; Pinem, Jhon Armedi
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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Abstract

Processing of palm oil into Crude Palm Oil (CPO) will produce a large amount of liquid waste. To produce a ton of crude palm oil (CPO) produced 6 m3 of palm oil mill effluent. In this study, a process for removing organic compounds in wastewater using the advanced oxidation process by combining peroxymonosulfate (2KHS5.KHSO4.K2SO4) and a catalyst of LaMnO3 Perovskite. The combination will produce sulfate free radicals that capable degrading harmful organic compounds in effluent effectively. Nanocrystalline LaMnO3 was obtained by calcination at a temperature of 800 °C for 2 hours with an average crystal diameter of the highest peak of 29 nm in the shape of the Rhombohedral catalyst and the catalyst has qualified the catalyst with a nanoparticle structure. Several variations of oxidation process variables were performed to assess their effect on organic matter decline. Some fixed variables were oxidation reaction temperature 30 oC, reaction time 120 min, stirring speed 400 rpm, and concentration of peroxymonosulfate solution 2 g/L, pH of liquid waste is 8 and catalyst concentration 0,4 g / L. Conclution of this research is efficiency of 80.5 % for decreasing COD and efficiency by 15,6% for TOC reduction. This proved that the LaMnO3 catalyst is capable of activating peroxymonosulfate.Keywords : AOP, LaMnO3 Perovskite, Oxidation, Peroxymonosulfate
KERAWANG GAYO DAN GEOMETRI Zulmaulida, Rahmy; Saputra, Edy
ALGORITMA: Journal of Mathematics Education Vol. 6 No. 1 (2024): ALGORITMA Journal of Mathematics Education
Publisher : Faculty of Educational sciences, UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/ajme.v6i1.40555

Abstract

AbstractGayo cultural diversity and the development of geometry concepts as a branch of mathematics can be collaborated through ethnomathematics. This research aims to see and study Kerawang Gayo's work in geometry. This study uses a qualitative approach to ethnography. The research was carried out in the city of Takengon, with the subject of the study being Kerawang Gayo's carving. The instruments used are non-test instruments such as interviews and observation sheets. The data analysis technique in this study goes through several processes, namely: a) data collection; b) reduction; c) presentation of fan data; and d) drawing conclusions. The results of the study showed that there were several motifs found, namely Upuh Ulen-Ulen, Pucuk Rebung, Mata Itik, Leladu, Tulen Ikan, Seisrung, Puter Tali, Gegaping, panah, motif peger, and rante. The motif contains geometric elements such as rectangles, rhombuses, circles, triangles, ellipticals, and straight lines.  AbstrakKeanekaragaman budaya Gayo dan perkembangan konsep geometri sebagai cabang ilmu dari matematika dapat dikolaborasi melalui etnomatematika. Penelitian ini bertujuaan untuk melihat dan menelaah kerawang Gayo pada Geometri. Penelitian ini menggunakan pendekatan kualitatif dengan etnografi. Penelitian dilaksanakan di kota Takengon dengan subjek penelitian adalah ukiran kerawang gayo. Instrumen yang digunakan adalah instrumen non tes seperti wawancara, dan lembar observasi. Teknik analisis data dalam penelitian ini melewati beberapa proses yaitu: a) pengumpulan data; b) reduksi; c) penyajian data fan d) penarikan kesimpulan. Diperoleh hasil penelitian bahwa terdapat bebrapa motif yang ditemukan yaitu Upuh Ulen-Ulen, Pucuk Rebung, Mata Itik, Leladu, Tulen Ikan, Seisrung, Puter Tali, Gegaping, panah, motif peger dan rante. Motif tersebut memuat unsur geometri seperti persegi panjang, belah ketupat, lingkaran, segitiga, elips dan garis lurus.
Sintesis dan Karakterisasi Katalis Nikel Zeolit Alam Ni/NZA Bahri, Syaiful; Saputra, Edy; Herman, Syamsu; Muhdarina, Muhdarina
Journal of Bioprocess, Chemical and Environmental Engineering Science Vol 5 No 1 (2024): Journal of Bioprocess, Chemical, and Environmental Engineering
Publisher : Department of Chemical Engineering, Faculty of Engineering, UNRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jbchees.5.1.36-45

Abstract

Research has been conducted to manufacture Ni/NZA for catalytic cracking of empty palm fruit bunches into liquid fuel. The study aims to investigate the impact of metal impregnation and calcination time variations on catalyst crystallinity and morphology. The catalyst is produced in multiple stages, including NZ activation using acid, followed by metal impregnation at 0%, 1%, 3%, and 5% w/w, and calcination at 500oC for 2, 4, and 6 hours, respectively. It is then oxidized at 400oC for 2 hours and reduced at 400oC for 2 hours. The catalyst's crystallinity, morphology, and metal distribution are determined through X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) analysis. The catalyst with the best crystallinity and metal distribution is found to have 3% metal loading and a calcination time of 2 hours.
Module Development for Curved Side 3D Geometric Shapes Based on STEAM Approach Saputra, Edy; Yustinaningrum, Bettri; Nurhayati, Nurhayati
Jurnal Ilmiah Pendidikan Matematika Al Qalasadi Vol 7 No 2 (2023): JURNAL ILMIAH PENDIDIKAN MATEMATIKA AL QALASADI
Publisher : Prodi Pendidikan Matematika, Fakultas Tarbiyah dan Ilmu Keguruan IAIN Langsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32505/qalasadi.v7i2.7542

Abstract

Class IX students of SMP Negeri 4 Takengon generally find it difficult to understand the mathematics learning material contained in the school textbook, besides that the teacher also feels that textbooks as teaching materials still do not help students in learning both at school and independently, so it is very necessary to have other teaching materials that can overcome this. Therefore the researcher felt that this research was very suitable to be carried out. This Research and Development (R&D) research uses the Rowntree development model whose goal is to develop math modules with the STEAM approach on curved side space material that is valid and practical for use in junior high school mathematics learning. The development process consists of three stages, namely the planning, development and evaluation stages using the formative evaluation procedure from Tessmer. Based on this development stage, a mathematics module with the STEAM approach has been produced which contains curved side geometrical material and can be categorized as very valid (content validation 4.54 and media validation 4.75) and also very practical based on one to one evaluation (teacher response 96.96% and student response 98.97%) and small group evaluation of 92.11%.
The Application of Nanofiltration Membrane for Palm Oil Mill Effluent Treatment by Adding Polyaluminium Chloride (PAC) as Coagulant Pinem, Jhon Armedi; Tumanggor, Imanuel; Saputra, Edy
Jurnal Rekayasa Kimia & Lingkungan Vol 15, No 1 (2020): Jurnal Rekayasa Kimia & Lingkungan (June, 2020)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v15i1.13952

Abstract

The rapid development of Crude Palm Oil (CPO) production has led to an increase in the production of Palm Oil Mill Effluent (POME) as well. POME will cause problems in the environment because contains high contaminants. This study aims to investigate the effect of the coagulant Polyaluminium Chloride (PAC) variations and the membranes operating pressure on the POME treatment process using the nanofiltration membrane (NF) with the coagulation-flocculation process as pre-treatment. The PAC was used in the coagulation-flocculation process with variations in concentration (5.0; 5.5; 6.0; 6.5; 7.0 g/L). The process was completed by a rapid stirring of 200 rpm for 5 minutes, followed with slow stirring at 60 rpm for 15 minutes and settling time for 30 minutes. The process of membrane nanofiltration was carried out for 60 minutes with variations in operating pressure (8.0; 9.0; and 10 bars). In each treatment process, effluent quality testing was carried out with Biochemical Oxygen Demand (BOD5), Chemical Oxygen Demand (COD), Total Suspended Solid (TSS) and oil/fat as parameters. In addition, an analysis of permeate fluxes and rejection of NF membrane was also carried out. The results of the analysis suggested that the best coagulant doses are 6.0 g/L with the reduction percentage of BOD, COD, TSS and oil/fat at 78.85%; 68.57%; 92.77% and 92.31% respectively. The highest percentage of NF membrane rejection was found at a pressure of 10 bar, which is equal to 94.71%; 94.86%; 97.92% and 95% respectively for BOD, COD, TSS and oil/fat with a flux value of 7.16 L/m2.hours.
Pengolahan Sampah Plastik Polypropylene (PP) Menjadi Bahan Bakar Minyak dengan Metode Perengkahan Katalitik Menggunakan Katalis Zeolit X Wahyudi, Ekky; Zultiniar, Zultiniar; Saputra, Edy
Jurnal Rekayasa Kimia & Lingkungan Vol 11, No 1 (2016): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v11i1.2958

Abstract

Penelitian ini dilakukan untuk mengkonversi sampah plastik menjadi bahan bakar minyak menggunakan katalis Zeolit X yang disintesis dari abu layang batubara yang selanjutnya dikarakterisasi menggunakan XRD. Dalam penelitan ini, sebanyak 100 gram plastik jenis polypropylene direngkah di dalam reaktor batch pada suhu 350o C, 400o C dan 450o C selama 60 menit dengan variasi rasio katalis/plastik 0,5; 1; 1,5 (% berat). Yield (%) tertinggi adalah 76,09% yang diperoleh pada variasi suhu 450o C dan rasio katalis/plastik 1,5%. Nilai kalor produk adalah 45,56 MJ/kg. Hasil analisa GC-MS menunjukkan % area produk mengandung bahan bakar seperti bensin (60,46%), kerosin dan solar (7,48%).
Bio-Oil dari Limbah Padat Sawit Saputra, Edy; Bahri, Saiful; Hs, Edward
Jurnal Rekayasa Kimia & Lingkungan Vol 6, No 2 (2007): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

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Abstract

Bahan bakar minyak merupakan sumber energi terpenting untuk kehidupan manusia. Produksi bahan bakar minyak yang berasal dari bahan bakar fosil semakin hari semakin menurun. Untuk itu diperlukan suatu alternatif sumber energi yang dapat diperbaharui dalam menggantikan bahan bakar fosil, salah satunya adalah mengkonversikan biomas menjadi biooil. Dalam penelitian ini digunakan limbah padat sawit, yaitu batang dan tandan kosong sawit dengan ukuran partikel 2-6 dan 6-10 mesh. Proses yang digunakan untuk mengkonversikan limbah padat sawit pada penelitian ini yaitu slow pyrolysis. Proses ini dilakukan pada reaktor pipa stainless steel dengan diameter 3,81 cm dan panjang 60 cm, pada kisaran temperatur 450-600oC yang dialiri gas nitrogen. Hasil yield tertinggi dicapai pada suhu 500oC dengan diameter partikel 2-6 mesh. Produk bio-oil dilakukan analisa dengan menggunakan GC HP 5890 II. Pada produk bio-oil juga teridentifikasi adanya etanol, benzena, toluena dan xylen.Kata kunci: bio-oil, limbah padat sawit, pyrolysis
Aksiologi Filsafat Matematika Zulmaulida, Rahmy; Maulizar, Hera; Saputra, Edy
Asimetris: Jurnal Pendidikan Matematika dan Sains Vol. 5 No. 1 (2024): Asimetris: Jurnal Pendidikan Matematika dan Sains
Publisher : Pendidikan Matematika Universitas Almuslim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51179/asimetris.v5i1.2444

Abstract

Penelitian ini menginvestigasi kontribusi aksiologi dalam konteks filsafat matematika dengan fokus pada dampaknya terhadap pendidikan matematika yang lebih etis dan efektif. Pendekatan penelitian yang digunakan adalah kualitatif dengan penelitian literatur. Penelitian ini menganalisis peran nilai-nilai etika dalam pengajaran matematika dan bagaimana pendidikan matematika dapat memperkaya pemahaman etika dan nilai-nilai matematika. Selain itu, penelitian ini juga mengulas dampak pemahaman tentang aksiologi pada persepsi masyarakat tentang matematika, dengan harapan meningkatkan kesadaran akan hubungan erat antara nilai-nilai dan etika dalam matematika. Hasil penelitian menunjukkan bahwa pemahaman aksiologi memberikan panduan berharga untuk pengembangan pendidikan matematika yang lebih etis dan efektif. Selain itu, pemahaman tentang aksiologi juga memengaruhi cara masyarakat melihat matematika, menciptakan kesadaran akan hubungan yang kuat antara nilai-nilai dan etika dalam disiplin ini. Hasil ini memiliki implikasi signifikan dalam meningkatkan kualitas pembelajaran matematika dengan memasukkan nilai-nilai etika dalam praktik matematika, sehingga menjembatani kesenjangan antara filsafat dan praktik matematika.
Co-Authors Ahmad Fadli Ahmad Zaki Andes Sagita Bahri, Saiful bettri yustinaningrum, bettri Charismayani Charismayani Desly Fadilla Simbolon Edward Hs Ega Gradini Eka Putri Sriandriani Ekadian Lestari Simatupang Ekky Wahyudi Enang Vovilya Erlisa Yanuari Putri Evelyn Evelyn Fitry Rahmah Gusti Ayu Nurjanah Hafizah Harnedi, Joni Hasrul Hasrul, Hasrul Imanuel Tumanggor Ismeddyanto, Ismeddiyanto Jhon Armedi Pinem Jhon Armedi Pinem Kartika Pratama Syafitri Khairat, Khairat Kiki Farida Ferine Komalasari Komalasari Lita Darmayanti Lora Mona Tambunan M. Isa Indrawan Magfirah Marlina Marlina Maulizar, Hera Miguel Felix Wijaya Monita Olivia Muhdarina Muhdarina Nani Agustina Nazily Haryati Noviani, Julia Nurhayati Nurhayati Nurlis Nurlis Nurul Hikmah Putri, Erlisa Yanuari Riandy, M Arief Rianti Ratna Dewi Rio Akbar Rio Saputra Saiful Bahri Saputra, Rio Sarah Sarmento, Amândio de Araújo Sihotang, Fernando Sitanggang, Ronal Rius Sri Ulina Beru Ginting Sutrisno, Sutrisno Suwarni Syafi’i, Abdullah SYAIFUL BAHRI Syamsu Herman Syarfi Syarfi Syelvia Putri Utami Tresia Monika Natalia Sinaga Trisuciati Syahwardini Tukiyo Tumanggor, Imanuel Utama, Panca Setia Utami, Rizka Wahyudi, Ekky Wahyuni Zumara Wali Ara Yelmida Azis Zuchra Helwani Zuchra Helwani, Zuchra Zultiniar Zultiniar Zultiniar, Zultiniar