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All Journal Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Komunikasi Fisika Indonesia Jurnal Teknosains Jurnal Fisika Unand JOURNAL ONLINE OF PHYSICS Jurnal Fisika FLUX ZERO : Jurnal Sains, Matematika dan Terapan Jurnal Rekayasa Material, Manufaktur & Energi Jurnal Redoks Zero : Jurnal Sains, Matematika, dan Terapan JISTech (Journal of Islamic Science and Technology) Fisitek : Jurnal Ilmu Fisika dan Teknologi JURNAL PENDIDIKAN TAMBUSAI JOURNAL OF SCIENCE AND SOCIAL RESEARCH Saintifik : Jurnal Matematika, Sains, dan Pembelajarannya Jurnal Elemen Jurnal Kumparan Fisika Pascal: Journal of Physics and Science Learning Jurnal Fisika dan Terapannya Navigation Physics : Journal of Physics Education Mimbar Kampus Journal of Technomaterial Physics Jurnal Energi Baru dan Terbarukan CHEDS: Journal of Chemistry, Education, and Science Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam (JURRIMIPA) EINSTEIN (E-JOURNAL) Jurnal Ilmu dan Inovasi Fisika
Ety Jumiati
Universitas Islam Negeri Sumatera Utara
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Other

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PENGARUH NILAI DENSITAS TERHADAP UJI TARIK PADA KOMPOSIT BERBAHAN BATANG KELAPA SAWIT Tia Rahmadani; Ety Jumiati; Miftahul Husnah
Pascal: Journal of Physics and Science Learning Vol 10, No 1 (2026): JUNI
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/pascal.v10i1.13748

Abstract

Material komposit ialah material yang tersusun atau terbentuk dari campuran dua atau lebih material dengan sifat yang berbeda dan menghasilkan suatu material yang baru yang mempunyai sifat berbeda. Penelitian ini bertujuan untuk mengetahui karakterisasi material komposit, dan untuk mengetahui bagaimana pengaruh uji densitas terhadap uji Tarik pada metrial komposit. Adapun bahan yang digunakan dalam pembuatan komposit adalah serat batang kelapa sawit, resin epoxy, resin polyester, resin vinyl-ester. Variasi komposisi antara serat bang kelapa sawit dengan perekat resin epoxy, polyester dan vinyl-ester yaitu sampel A, 40%:60% menggunakan resin epoxy, sampel B, 40%:60% menggunakan resin polyester, sampel C, 40%:60% menggunakan resin vinyl-ester. Material komposit dicetak menggunakan mesin hot press dengan tekanan 0,1 MPa dan suhu 150˚C selama 15 menit. Hasil dari pengukuran densitas sebesar 0,79-0,94 g/cm3, nilai uji tarik sebesar 7,0-13,4 MPa.
Reduction of COD and BOD Levels in Tofu Liquid Waste Processing Using the Electrocoagulation Method Suci Amanda Suci; Masthura Masthura; Ety Jumiati
Journal of Technomaterial Physics Vol. 7 No. 2 (2025): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v7i2.22378

Abstract

Tofu liquid waste treatment is very important because of its high organic content and can cause environmental pollution. This research uses electrocoagulation method with cylindrical aluminum electrodes to lower Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) levels. The variation of the treatment time used is 45, 60, and 75 minutes with a voltage of 12 volts and a distance between the electrodes of 2 cm. The test results showed that the BOD concentration decreased from 816 mg/L to 57–104 mg/L (efficiency 87–93%), while COD decreased from 2696 mg/L to 78–118 mg/L (efficiency 95–97%). In addition, the pH increased from 3.44 to 6.03–6.99 so that it is close to neutral condition. All final results meet the quality standards of liquid waste according to the Regulation of the Minister of Environment and Forestry No. 5 Year 2014, as well as aluminum content according to drinking water quality standards according to Permenkes No. 492/MENKES/PER/IV/2010. Thus, electrocoagulation using cylindrical electrodes is proven to be effective, environmentally friendly, and potentially applied to small to medium-scale tofu waste treatment.
The effect of Electrode Type Differences on BOD and COD Reduction in Tofu Wastewater Treatment khofifah khofifahparawansyah; Masturah Masturah; Ety Jumiati
Journal of Technomaterial Physics Vol. 7 No. 2 (2025): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v7i2.22431

Abstract

Research has been conducted aimed at testing the results of tofu liquid waste samples on the Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) parameters before and after the electrocoagulation process using Al, Cu, and Zn electrodes. This study used tofu liquid waste from Jl. Pasar V Helvetia. The BOD test results before electrocoagulation were 816 mg/L. The BOD test results after electrocoagulation with Al electrodes were 112 mg/L, Cu electrodes were 55 mg/L, and Zn electrodes were 115.2 mg/L. The COD level test results before electrocoagulation were 2696 mg/L. The COD level test results after electrocoagulation with Al electrodes were 95 mg/L, Cu electrodes were 62 mg/L, and Zn electrodes were 105 mg/L. From the electrode variations, the best results were obtained for testing the BOD and COD levels of tofu liquid waste on the Cu electrode.
Co-Authors ., Masthura Abdul Halim Daulay Adiani Nasution, Arfa Afifah Azmi Aiysah Hannum Pulungan Ananda Tira Septiana Sari Ananda, Putri Dwi Arif Amri Panggabean Armais Mutiah Abdul Hidayat Aruan, Ririn sagita asnitha aritonang Asyari, Auly - Ayu Amalya Rahma Ayu Dwi Retno Azmi, Afifah Bayu Anugrah KS Br Lubis, Lailatul Husna Dian Frasisca Dika Prananda Dimas Pratama, Dimas endang sagita ritonga Ervina Putri Wulandari Fazira, Natasya Aulia Harahap, Nurlaila Sari Harahap, Sarah Aprilia Hayat, Lisa Fadhilah Husna Br. Lubis, Lailatul Husnah, Miftahul - Hutauruk, Siti Aulia Ismail Husein, Ismail Khairunnisa, Umi Khairunnisa khofifah khofifahparawansyah Kiki Noviansyah Lubis, Fadilah Azzahra Masthura Masthura, Masthura Masthura, Masthura Masturah Masturah Mella Yolanda Alfika Meutia Nanda Miftahul Husnah Miftahul Husnah Miftahul Husnah Mughiroh, Hafizul Mulia Ningsih Nabilah, Cinthia Farah Nanda Putri Afrilda Nanda, Meutia Nasution, Annisa Salsha Safira Nasution, Annisa Wulan Dhari Nasution, Nazaruddin Nazaruddin Nasution Nia Soraya Niken Ayu Ningsih, Mulia Nita Zahara Nasution Noviansyah, Kiki Nujulia Subuharni Nur Ainun Munthe Nur Aisah Sagala Nur'aini Fadillah Nurfebia, Karina Nurhayati Nurhayati Nurlaila Sari Harahap Pratiwi, Pebi Ajeng Putri Indah Sari Putri Nadila Rachmaini, Alya Rahmad Rani Saputri Ratni Sirait Ratni Sirait Ratni Sirait Ratni Sirait, Ratni Riadina Siregar Ridwan Yusuf Lubis Ridwan Yusuf Lubis Rika Ramtika Rika Safitri Ririn sagita Aruan Rizki Qorina Safina, Nurul Sandi Tri Febriani Sari, Devi Kumala Sariah, Jati Nur Silalahi, Homsiah Mayang Sari Siti Munawaroh Siti Munawaroh Siti Putri Masyitah Siti Rahma Daulay Sonia Tampubolon Srg, Dini Anggraini Sri Ayu Lestari Sri Wahyuni Ritonga Suci Amanda Suci Sulkha, Amalia Sunny Nafisah Tambunan, Efrida Pima Sari Tia Rahmadani Tiara, Finky Manda Titi Winda Sari Tri Ninda Malika ufik eliati tumanggor Umairoh, Ninda