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All Journal Reaktor JURNAL KIMIA SAINS DAN APLIKASI JURNAL TEKNOLOGI LINGKUNGAN Jurnal Teknik Kimia Journal of Natural Sciences and Mathematics Research Briliant: Jurnal Riset dan Konseptual Journal of Research and Technology IJEMS (Indonesian Journal of Environmental Management and Sustainability) Civil and Environmental Science Journal (CIVENSE) Chemistry Indonesian Journal of Chemical Research Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Jurnal Inovasi Teknik Kimia ASEAN Journal of Community Engagement G-Tech : Jurnal Teknologi Terapan Nusantara Science and Technology Proceedings International Journal of Eco-Innovation in Science and Engineering (IJEISE) Envirous Sinergi Polmed : Jurnal Ilmiah Teknik Mesin Ranah Research : Journal of Multidisciplinary Research and Development Journal Serambi Engineering (JSE) JURNAL REKAYASA KIMIA & LINGKUNGAN
Ketut Sumada
Chemical Engineering Department, Faculty Of Engineering And Science, Universitas Pembangunan Nasional “Veteran” Jawa Timur
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Transportation Other

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UNJUK KERJA DAN EFISIENSI TURBIN UAP DAN GENERATOR (TG-65) PADA PEMBANGKIT LISTRIK UNIT SISTEM UTILITAS DEPARTEMEN PRODUKSI IIIA PT PETROKIMIA GRESIK Pingky Fantika Wulandari; Delfian Lutfiananda; Ketut Sumada; Lilik Suprianti
SINERGI POLMED: Jurnal Ilmiah Teknik Mesin Vol. 4 No. 1 (2023): Edisi Februari
Publisher : Politeknik Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51510/sinergipolmed.v4i1.1036

Abstract

Power generation merupakan salah satu unit penting dalam sistem utilitas suatu pabrik. Power generation pada pabrik IIIA PT Petrokimia dijalankan menggunakan tenaga uap (steam). Salah satu komponen yang terdapat pada power generation unit yaitu turbin & generator. Untuk mengetahui perfoma dari turbin-generator diperlukan analisis efisiensi dari alat tersebut. Analisis ini dapat dilakukan menggunakan perhitungan yang diperoleh dari literatur dan data yang diperoleh dari lapangan. Berdasarkan hasil perhitungan analisis efisiensi didapatkan efisiensi turbin-generator tertinggi yaitu pada tanggal 24 November 2022 dengan efisiensi berturut-turut sebesar 91,5% % dan 90,1%.
Precipitated calcium oxide nanosize from limestone and blood clam shells Caecilia - Pujiastuti; Srie Muljani; Ketut Sumada
Journal of Natural Sciences and Mathematics Research Vol 9, No 1 (2023): June
Publisher : Faculty of Science and Technology, Universitas Islam Negeri Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/jnsmr.2023.9.1.13209

Abstract

Calcium oxide (CaO) is a product that is needed by various types of industries such as the pharmaceutical, chemical, agricultural and health industries. CaO is generally produced by the calcination method of CaCO3 materials such as calcium carbonate rocks or from various types of shells. The calcination method requires a large amount of energy because the operating temperature is above 1000 C and the resulting calcium oxide product is still micrometer size. This study developed nanosize precipitated CaO from two calcium sources, namely blood clam shells and limestone. For clam shells using hydrochloric acid as a solvent and sodium hydroxide as a precipitating agent, while for limestone using phosphoric acid as a solvent and potassium hydroxide as a precipitating agent. The effect of acidity (pH) and calcination temperature on the characteristics of the precipitated CaO was observed. The blood calm shell produces precipitated CaO 85-92 % with a particle size of 200-250 Nm and the limestone produces precipitated CaO 42-66% with a particle size of 250-300 Nm 
Pengolahan Limbah Yeast Mud Menjadi Pupuk Organik Padat Menggunakan Metode Composting Aerob Amelia Putri Kusherawati; Clareta Rahmawati Maudy; Ketut Sumada; Caecilia Pujiastuti; Srie Muljani
Jurnal Serambi Engineering Vol. 9 No. 3 (2024): Juli 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Bioethanol is one of the alternative materials that can reduce dependence on non-renewable fuel oil. The process of making bioethanol produces by-products in the form of waste. Yeast mud is solid waste from the initial precipitation process of ethanol production. Yeast mud contains organic carbon of 39.33%, total nitrogen as nitrogen compounds of 1.76%, and a C/N ratio of 22. The organic carbon content contained in yeast mud exceeds the 2018 SNI value of a maximum of 32%. This study aims to determine the time needed to produce solid organic fertilizer in accordance with the Indonesian National Standard. The parameters used to determine the quality of solid organic fertilizer produced are C-Organic content, Nitrogen content, and C/N ratio. The method used in this research is aerobic composting with variations in the mass of yeast mud waste (1 kg; 2kg; 3 kg; 4 kg; and 5 kg) and variations in composting time (3; 4; 5; 6; 7 days), as well as an aeration rate of 1.5 l/min. The results showed that the C-Organic content that met the maximum SNI standard of 32% was obtained under the condition of a mass of yeast mud waste of 1 kg with a time of 5 days with a C-Organic content of 31.45% and a mass of yeast mud waste of 2 kg with a time of 7 days with a C-Organic content of 31.96%.
OPTIMASI EKSTRAKSI MINYAK BIJI WIJEN DENGAN PELARUT N-HEKSANA DALAM TANGKI BERPENGADUK Farhan Azka Nashuha; Reza Salsabilla Kafy; Ketut Sumada
Jurnal Inovasi Teknik Kimia Vol 9, No 1 (2024)
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v9i1.9045

Abstract

Wijen merupakan yang dibudidayakan sebagai sumber minyak nabati. Berdasarkan penelitian terdahulu perlu dilakukan metode lain selain menggunakan metode cold press untuk menigkatkan minyak yang didapat dengan menggunakan tangki berpengaduk. Sehingga diharapkan perolehan rendemen yang didapat lebih banyak dibanding menggunakan metode cold press. Oleh karena itu peneliti mencoba melakukan penelitian dengan judul “Optimasi Ekstraksi Minyak Biji Wijen Dengan Pelarut N-Heksana Dalam Tangki Berpengaduk”. Penelitian ini bertujuan untuk menentukan optimasi proses ekstraksi dalam tangki berpengaduk dengan menggunakan bilangan CAMP. Metode yang digunakan adalah ekstraksi menggunakan alat tangki berpengaduk. Perbandingan jumlah biji wijen dan pelarut Nheksana pada tiap sampelnya sebanyak 1:5. jumlah biji wijen sebanyak 80 gram dan pelarut N-heksana sebanyak 400 ml. untuk variabel yang dijalankan berupa kecepatan pengadukan (rpm) sebesar 100, 200, 300, 400, 500. Dan waktu pengadukan (menit) sebesar 20, 40, 60, 80, 100. Hasil ekstraksi kemudian difiltrasi untuk memisahkan ampas biji wijen dengan filtratnya. Kemudian filtrat tersebut dilakukan proses distilasi untuk pemisahan pelarut dengan minyak wijen murni untuk dihitung perolehan yield nya dan menghitung optimasi bilangan CAMP. Kemudian menganalisa minyak wijen murni dari perolehan optimasi bilangan CAMP. Bilangan CAMP optimum berkisar antara 10,06 x  hingga 11,67 x  dengan perolehan yield sebesar 49,5%  Kata kunci: Biji Wijen, Bilangan Camp, Ekstraksi
Pemanfaatan Limbah Mikroorganisme Anaerob Proses Biogas Menjadi Pupuk Organik Padat Erda Roriza Putri Redina; Niken Febrila Awardani; Ketut Sumada
Jurnal Serambi Engineering Vol. 9 No. 4 (2024): Oktober 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

The production process of biogas, which utilizes anaerobic biological processes, not only results in biogas but also produces slurry in the form of microorganism waste over time. The increasing number of anaerobic microorganism processes presents challenges that make it inadvisable to directly dispose of this anaerobic microorganism waste into the environment, as it has the potential to be a pollutant. Environmental management efforts can involve utilizing this waste to create solid organic fertilizer. This is due to the fact that the waste contains essential nutrients for plants, including nitrogen (N), carbon (C), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), copper (Cu), and zinc (Zn). Despite the presence of both macromolecular and micromolecular organic matter, the C-organic content of anaerobic microorganism waste exceeds the minimum standard for solid organic fertilizer C/N ratio of 25, with a value of 49.62. A variety of techniques may be employed to reduce the C-organic content of anaerobic microorganism waste, including aerobic composting. The objective of this research is to ascertain the C-organic (C) and nitrogen (N) content in the solid organic fertilizer produced and to gain insight into the influence of air flow rate (oxygen) (liters/minute) and composting time (days) on the quality of the solid organic fertilizer produced. The findings of the study indicate that an increase in composting time results in a reduction in the C/N ratio, with a stabilization observed during a seven-day composting period, exhibiting a C/N ratio value of 18.05. An increase in the air flow rate results in a notable reduction in the C/N ratio. The greatest reduction, amounting to 65.85%, was observed when an air flow rate of 8.5 L/minute was employed.
Sintesa dan Karakterisasi Nanopartikel Kalsium Oksida Dari Cangkang Telur Dengan Metode Presipitasi Anggelina, Efline; Noviardyanti, Fara Zabrina; Pujiastuti, Caecilia; Muljani, Srie; Sumada, Ketut
Jurnal Teknik Kimia Vol 18, No 2 (2024): Jurnal Teknik Kimia
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v18i2.4485

Abstract

Penelitian ini berfokus pada pengembangan metode pembuatan nanopartikel kalsium oksida dari cangkang telur. Cangkang telur mengandung kalsium karbonat (CaCO3) 98%. Cangkang telur dihaluskan berukuran 100 mesh. Setiap 50 gram cangkang telur direaksikan dengan larutan HCl konsentrasi 3N 250 ml. Filtrat larutan CaCl2 direaksikan dengan kalium oksida (KOH) berkonsentrasi 3N sesuai variabel pH (7,9,11 dan 13) lalu diaduk dengan kecepatan magnetic stirer 90 rpm selama waktu sesuai variabel waktu (30, 60, 90, 120 dan 150 menit) akan membentuk endapan Ca(OH)2. Endapan akan disaring lalu dikeringkan dengan oven bersuhu 100°C selama 15 menit. Endapan tersebut diproses dalam tungku pembakaran dengan suhu 700°C selama 3 jam untuk menghilangkan kandungan gas hidrogen (H2). Hasil sintesa kalsium oksida (CaO) kemudian diuji XRF dan SEM-EDX untuk mengetahui kondisi operasi terbaik dan kesesuaian karakteristik nanopartikel. Hasil uji XRF didapatkan senyawa kalsium oksida (CaO) berwarna putih pucat mengandung kalsium oksida (CaO) terbaik sebesar 93,3% diperoleh dari varibel pH 13 dan waktu pengadukan selama 90 menit. Hasil SEM-EDX menunjukkan sintesa nanopartikel kalsium oksida (CaO) sebesar rata-rata 200 mesh sesuai dengan Badan Standarisasi Nasional yaitu dibawah 100 mesh. DOI: https://doi.org/10.33005/jurnal_tekkim.v18i2.4485
Fe Ion extraction in patchouli oil with ion exchange using resin Jaenuri, Abdul Rahman Khadafi; Anarchie, Thafie Ghilas; Sumada, Ketut
Civil and Environmental Science Journal (CIVENSE) Vol. 6 No. 1 (2023)
Publisher : Fakultas Teknik Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.civense.2023.00601.2

Abstract

Patchouli is the largest non-oil export commodity among essential oil exports in Indonesia. However, the quality of patchouli oil in Indonesia is considered to be very low. Traditional patchouli oil distillation is carried out in a small capacity and uses a simple distillation method based on a large difference in boiling points or one of the volatile components. This process produces poor quality patchouli oil such as acid number more than 8, dark oil, patchouli alcohol less than 30%, and high water content. This is evidenced by the large amount of Fe metal contained in patchouli oil. Patchouli oil produced contains a lot of iron in its yield, so it needs further processing to reduce the Fe content in patchouli oil. The use of resin as an adsorbent for Fe metal is one way to reduce the Fe metal content. Resin weighing 50, 150 and 250 grams was added to 200 ml of patchouli oil. Then the stirring process was carried out with a stirring speed of 200 rpm with time variations of 30, 60 and 90 minutes. The results obtained showed the best adsorption process with Fe content in patchouli oil of 1.42 mg/Kg, contact time of 90 minutes and amount of resin of 250 grams with the largest percentage of removal of 87.5%. Keywords: Patchouli oil, Ion Exchange, Resin.
TEKNOLOGI NOZZLE SPRAY UNTUK MEMPERCEPAT EVAPORASI AIR LAUT DALAM PRODUKSI GARAM KONVENSIONAL Verbiawan, Erza Anggara; Ramadhan, Mochamad Rafli; Sumada, Ketut; Muljani, Srie; Pujiastuti, Caecilia
Jurnal Teknik Kimia Vol 18, No 1 (2023): Jurnal Teknik Kimia
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v18i1.4125

Abstract

Garam merupakan salah satu kebutuhan pokok manusia yang tidak bisa terhindarkan. Salah satunya di Indonesia yang kebutuhan akan garam rakyat/krosok terus mengalami peningkatan tiap tahunnya. Dalam pemenuhan kebutuhan garam nasional, kapasitas produksi garam tahunan di Indonesia sangat jauh dibawah kebutuhan garam nasional tiap tahunnya, sehingga Indonesia melakukan impor garam untuk memenuhi kebutuhan tersebut. Hal tersebut tentunya menjadi permasalahan baik dari segi ekonomi maupun proses produksi yang selama ini dilakukan di Indonesia dimana masih menggunakan metode konvensional /tradisional. Tujuan dari penelitian ini adalah untuk memberikan inovasi baru terkait teknologi proses produksi garam yakni dengan menggunakan nozzle spray untuk mempercepat evaporasi air laut untuk produksi garam, serta mengetahui pengaruh ukuran diameter nozzle dan faktor lain terhadap laju evaporasi air laut. Metode yang digunakan adalah melakukan pengukuran terhadap temperatur, humidity, kecepatan angin, dan volume air laut yang teruapkan untuk penentuan laju evaporasi. Hasil penelitian ini membuktikan bahwa diameter nozzle ataupun penggunaan teknologi nozzle spray ini berpengaruh pada kecepatan evaporasi air laut dimana didapatkan peningkatan laju evaporasi rata-rata sebesar 4.8 x 10-5 m3/m2/detik dengan penggunaan nozzle berdiameter 1 mm. Dengan demikian dapat disimpulkan bahwa teknologi nozzle spray mempercepat laju evaporasi air laut dalam produksi garam.  DOI : https://doi.org/10.33005/jurnal_tekkim.v18i1.4125
The Synthesis and Characterization of A New Composite Material Ca-Mg-NH₄-PO₄ Dolomite-Based for Effective Multinutrient Fertilizer in Plant Growth Noni Aulia; Vica Brilliany Sanjaya; Ketut Sumada; Lilik Suprianti
Jurnal Kimia Sains dan Aplikasi Vol 27, No 11 (2024): Volume 27 Issue 11 Year 2024
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.27.11.531-537

Abstract

The rapid expansion of Indonesia's agricultural sector has led to a surge in fertilizer demand. Dolomite lime shows potential as a promising alternative material to enhance fertilizer quality. This study aims to synthesize and characterize a Ca-Mg-NH4-PO4 composite using dolomite as a precursor through precipitation. The synthesis was successfully achieved through several stages, beginning with dolomite preparation, dissolution in 5N phosphoric acid, and subsequent precipitation with ammonium hydroxide at pH 8, 30°C, with a stirring speed of 450 rpm. The resulting composite was analyzed using various analytical techniques to evaluate its structural, morphological, and elemental compositions. X-Ray Diffraction (XRD) results indicated the formation of struvite crystals at positions 2θ = 20.828°, 30.539°, 33.234°, brushite crystals at position 2θ = 11.650°, and impurity compounds that appeared during the synthesis process. Impurities affecting crystal purity were detected but could be minimized through washing. Scanning Electron Microscopy (SEM) analysis revealed a monoclinic crystal morphology with particle sizes ranging from 4.32 μm to 579 nm. X-Ray Fluorescence (XRF) and Energy Dispersive X-Ray (EDX) analysis verified the presence of Ca, Mg, NH₄, and PO₄ components in the composite. Fourier-Transform Infrared Spectroscopy (FTIR) analysis showed that the composite has P-O-C functional groups at 949 cm⁻¹, 972 cm⁻¹, and 1027 cm⁻¹, and N-H functional groups at 1466 cm⁻¹. Overall, this Ca-Mg-NH₄-PO₄ composite derived from dolomite demonstrates promising characteristics as a multi-nutrient fertilizer, offering a high-quality option to support sustainable agricultural practices.
Pembuatan Pupuk Granul Dari Limbah Gypsum dan Urea Pamoedji, Yemima Natalia Eka Kristiyanti; Widyaningrum, Nilam Putri; Muljani, Srie; Perwitasari, Dyah Suci; Sumada, Ketut
Jurnal Teknik Kimia Vol 19, No 1 (2024): Jurnal Teknik Kimia (JUTEKK) Vol.19, No.1, 2024
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v19i1.4826

Abstract

Gipsum adalah salah satu dari sejumlah mineral yang mengendap. Mineral-mineral lain yang termasuk dalam kelompok ini meliputi karbonat, borat, nitrat, dan sulfat. Jenis gipsum yang paling umum dijumpai adalah varietas hidrat kalsium sulfat dengan rumus kimia CaSO4.2H2O. Kandungan Ca pada gipsum dimanfaatkan sebagai campuran pupuk organik yang dapat membantu perkembangan akar, bunga, dan buah pada tanaman. Salah satu pengolahan padatan gypsum menjadi pupuk granul dengan penambahan urea sebagai penambah unsur nitrogen. Penelitian ini bertujuan untuk mencari kadar nitrogen yang sesuai dengan SNI (Standar Nasional Indonesia) didalam pupuk granul. Metode yang digunakan adalah pencampuran padatan gypsum yang telah kering sebanyak 5000 gram dengan penambahan urea 1000 gram; 1250 gram; dan 2500 gram, dan di granulasi selama 30 menit; 60 menit; dan 90 menit. Produk disaring sesuai dengan ukuran, kemudian di analisa kadar nitrogennya. Berdasarkan hasil penelitian, diperoleh kadar nitrogen tertinggi pada proses granulasi dengan penambahan urea 1250 gram dengan waktu 60 menit yaitu sebesar 2,65%.
Co-Authors Adinda Rimarsya Bahita Ahmad Adzani, Mayla Fayzza Aisyah Alifatul Zahidah Rohmah Alifah Nur Aini Fajrin Amelia Putri Kusherawati Anarchie, Thafie Ghilas Anggelina, Efline Anggoro, Achmad Rahditya Viman Anggraeni, Verendria Putri Caesar Anggun, Brendayani Arianti, Rahma Dea Rerindra Arief S, Purwanto Bambang Wahyudi Wahyudi Berliana Ayu Emilia Candra Dewi Caecilia - Pujiastuti Caecilia Pudjiastuti Caecilia Pujiastuti Caecilia Pujiastuti Caecilia Pujiastuti Caecilia Pujiastuti Chaerani, Novika Cahya Cindy Saskia Damayanti Clareta Rahmawati Maudy Delfian Lutfiananda Dewi, Dwi Kirana Ika Candra Dimas Agus Andriansyah Dwi Hery Astuti Dyah Suci Perwitasari Effendi, Anggi Aulia Putri Erda Roriza Putri Redina Erwan Adi Saputro Fahturrozak, Ahmad Farhan Azka Nashuha Hamzah, Maditya Amirul Jaenuri, Abdul Rahman Khadafi Kindriari Nurma Wahyusi Laila, Indah Nur Meriana Armidianti Meriska Diva Nadia Putri Amrulloh Meutia Familya Monica, Clarissa Putri Muhimatur Rosida Nailah Rosikah, Nasywa Ni Ketut Sari Niken Febrila Awardani Noni Aulia Nove Kartika Noviardyanti, Fara Zabrina Palaguna, Kadek Aditya Pamoedji, Yemima Natalia Eka Kristiyanti Pingky Fantika Wulandari Pradana, Alfian Rizki Priambodo, Melandy Dwi Pujiastuti, Caecilia Pujiastuti, Caecilia Pujiastuti, Caecilia Pujiastuti, Caecilia Pujiastuti, Caecilia Pujiastuti, Caecilia - Putri, Dinar Ismilla Rahmawati, Belinda Tri Setya Rahmawati, Fajar Nanda Raka Selaksa Charisma Muchammad Ramadhan, Mochamad Rafli Retno Dewati Retno dewati Reza Salsabilla Kafy S Suprihatin Safira, Lutfia Rima Saudhia Aulizya Niswatul Khusna Selvia Sofi Yanti Setiani, Astri Silviana Ariana Sintha Soraya Santi Sri Muljani Sri Muljani SRIE MULJANI Suprianti, Lilik Suprihatin Suprihatin Susilowati Tiur Lina Tri Andini Agustin Verbiawan, Erza Anggara Vica Brilliany Sanjaya Vidyantari, Lyra Widya P, Vika Widyaningrum, Nilam Putri Yogaswara, Rachmad Ramadhan Yuriko Tiara Yustina Ngatilah Yustina Ngatilah Zain, Tama Rahmandha