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Pengaruh Perlakuan Awal terhadap Karakteristik Bioetanol dari Limbah Kulit Singkong Karet (Manihot glaziovii) Yuniarti, Reni; Satria, Arysca Wisnu; Wiandini, Wandha; Zaezarini, Nabhila; Achmad, Feerzet; Yusupandi, Fauzi
Jurnal Teknik Kimia USU Vol. 13 No. 1 (2024): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v13i1.13174

Rubber cassava peel waste (Manihot glaziovii) has a high carbohydrate content, so it is feasible to convert it into bioethanol. In general, bioethanol production consists of four steps, pretreatment, hydrolysis, fermentation, and purification. The purpose of this study was to determine the suitable treatment for obtaining bioethanol with the finest characteristics from rubber cassava peel using three treatment variations, the pretreatment process with variations in the dissolving ratio of sodium hydroxide (NaOH) 0.5 M of 1:10; 1:12.5; and 1:15 (w/v), the hydrolysis process with various concentrations of sulfuric acid (H2SO4) of 0.15 N; 0.30 N; and 0.45 N, and the fermentation process with variations in the fermentation time for 3 days, 7 days, and 9 days. Based on the research results, the highest glucose content was 0.91%, with variations in dissolving NaOH 0.5 M 1:15 (w/v) in the pretreatment process and variations in the concentration of 0.30 N H2SO4 in the hydrolysis process, while the highest ethanol content was 68.05% at a fermentation time of 7 days.

Heavy hydrocarbon recovery with integration of turboexpander and JT valve from highly CO2-containing natural gas for gas transmission pipeline Yusupandi, Fauzi; Widiatmoko, Pramujo; Sukmana, Ira Febrianty; Fitri, Hera Rahma; Eviani, Mitra; Devianto, Hary
Jurnal Rekayasa Proses Vol 17, No 2 (2023)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.82485

Demand of natural gas is predicted to increase since many valuable products can be produced. Water and heavy hydrocarbon content are the key for gas pipeline facility. To meet requirement of natural gas transportation, dehydration unit (DHU) and hydrocarbon dew point control unit (DPCU) are necessary to avoid water and hydrocarbon condensation during transmission. The conventional dehydration technology, TEG contactor, can lower water content from 1,304 mg/m3 to 80.35 mg/m3 where the maximum limit of water content in natural gas is 97 mg/m3 to prevent hydrate formation. DPCU is installed to remove heavy hydrocarbon, especially C5+. Integration of JT valve and turboexpander was employed to obtain the low gas dew point. The hot gas stream that entered the JT valve was observed. The lower hot bypass gas was applied, the lower hydrocarbon dew point and the more condensate flowrate was achieved. indohoki77 adalah salah satu platform judi online terkemuka yang menyediakan berbagai jenis permainan bagi para penggemar judi di Indonesia.The highest power generation can be gained at low hot gas flow ratio which also influenced the exit pressure and temperature of compressor. In pipeline simulation, the pressure and temperature drop occurred at the high hot gas rate. To examine the arrival condition, dew point curves were generated and showed that the limitation of hot gas flow ratio has to be below 0.6 to prevent heavy hydrocarbon condensation in pipeline.

Investigating the Tribological Performance of Natural Rubber Additives in Palm Oil-Based Lubricants Aji, Ahmad Frantoni; Alfian, Devia Gahana Cindi; Prasetyo, Tri Wahyu; Firjatullah, Ahmad Labib; Sufra, Rifqi; Pujiyulianto, Eko; Silitonga, Dicky Januarizky; Auriyani, Wika Atro; Yusupandi, Fauzi
ROTASI Vol 26, No 3 (2024): VOLUME 26, NOMOR 3, JULI 2024
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/rotasi.26.3.57-64

Human dependence on mineral-based energy sources poses challenges related to toxicity, depletion, degradation, and environmental hazards. An appropriate replacement for mineral-based lubricants has yet to be realized; one available option for humans is alternative, renewable, environmentally friendly, and biodegradable energy sources. Lubricants play an important role in product processing, transportation, agriculture, and other key sectors in industrial development. This study was conducted to explore the potential use of palm oil as the main ingredient with the addition of rubber as an additive. The method of making the lubricant involved mixing 3%, 5%, and 7% rubber latex with sonicated palm oil using UAE. Next, wear testing was performed using a tribometer based on the ball-on-disc principle, utilizing a modified bench-top drill machine. The testing was carried out at room temperature, maintaining a constant load of 8.83 N and a rotational speed of 180 rpm for 5 minutes per sample. Microscopic analysis of the wear scars on the plate samples showed different wear patterns and characteristics for each lubricant, with measurements taken at various positions for accuracy. The results indicated that the lubricant with a 5% rubber mixture was the best, with a wear width of 535.9126 µm, compared to the commercial lubricant (SAE 15W 40) which had a wear width of 539.906 µm. This research demonstrates the potential use of a palm oil and rubber mixture as a more environmentally friendly lubricant alternative.

Pengaruh Perlakuan Awal terhadap Karakteristik Bioetanol dari Limbah Kulit Singkong Karet (Manihot glaziovii) Yuniarti, Reni; Satria, Arysca Wisnu; Wiandini, Wandha; Zaezarini, Nabhila; Achmad, Feerzet; Yusupandi, Fauzi
Jurnal Teknik Kimia USU Vol. 13 No. 1 (2024): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v13i1.13174

Rubber cassava peel waste (Manihot glaziovii) has a high carbohydrate content, so it is feasible to convert it into bioethanol. In general, bioethanol production consists of four steps, pretreatment, hydrolysis, fermentation, and purification. The purpose of this study was to determine the suitable treatment for obtaining bioethanol with the finest characteristics from rubber cassava peel using three treatment variations, the pretreatment process with variations in the dissolving ratio of sodium hydroxide (NaOH) 0.5 M of 1:10; 1:12.5; and 1:15 (w/v), the hydrolysis process with various concentrations of sulfuric acid (H2SO4) of 0.15 N; 0.30 N; and 0.45 N, and the fermentation process with variations in the fermentation time for 3 days, 7 days, and 9 days. Based on the research results, the highest glucose content was 0.91%, with variations in dissolving NaOH 0.5 M 1:15 (w/v) in the pretreatment process and variations in the concentration of 0.30 N H2SO4 in the hydrolysis process, while the highest ethanol content was 68.05% at a fermentation time of 7 days.

Intensifikasi Pengolahan Limbah Cair Laboratorium Melalui Proses Koagulasi dan Adsorpsi Studi Pengolahan Limbah Cair Laboratorium dengan Metode Kombinasi Fisika-Kimia Sufra, Rifqi; Panjaitan, Jabosar R.H; Alhanif, Misbahudin; Mustafa, Mustafa; Yusupandi, Fauzi; Adriansyah, Endi; Rahmadini, Gustia; Raqin, M. Rayhan; Herawati, Peppy; Suzana, Asih
Jurnal Talenta Sipil Vol 7, No 1 (2024): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v7i1.460

Laboratory is one of the generators of hazardous liquid waste derived from chemicals used in practice and research. The waste is very dangerous when discharged into the environment because of the pollutants it contains. Therefore, it is necessary to treat the waste before it is disposed of to minimize the impact of pollution caused by the waste. The study aims to compare the effectiveness of zeolite adsorbents and activated carbon in reducing COD, TSS, and Cr heavy metals. Waste treatment is carried out by coagulation and adsorption methods. The adsorption process is performed using two types of adsorbents: zeolite and activated carbon. This study was carried out by variing the mass of the adsorbents at the time of complaining for 120 minutes in batches. Variations in the masses of the used 3, 5, 7, and 10 grams of adsorbenes. The results of the study showed that the more adsorbanes used, the higher the reduction of pollutant levels. The use of 10 grams of activated carbon adsorbents can reduce TSS pollutants levels of 92%, COD 95%, Cr 65%, and pH 5,0-6,38.

Heavy hydrocarbon recovery with integration of turboexpander and JT valve from highly CO2-containing natural gas for gas transmission pipeline Yusupandi, Fauzi; Widiatmoko, Pramujo; Sukmana, Ira Febrianty; Fitri, Hera Rahma; Eviani, Mitra; Devianto, Hary
Jurnal Rekayasa Proses Vol 17, No 2 (2023)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.82485

Demand of natural gas is predicted to increase since many valuable products can be produced. Water and heavy hydrocarbon content are the key for gas pipeline facility. To meet requirement of natural gas transportation, dehydration unit (DHU) and hydrocarbon dew point control unit (DPCU) are necessary to avoid water and hydrocarbon condensation during transmission. The conventional dehydration technology, TEG contactor, can lower water content from 1,304 mg/m3 to 80.35 mg/m3 where the maximum limit of water content in natural gas is 97 mg/m3 to prevent hydrate formation. DPCU is installed to remove heavy hydrocarbon, especially C5+. Integration of JT valve and turboexpander was employed to obtain the low gas dew point. The hot gas stream that entered the JT valve was observed. The lower hot bypass gas was applied, the lower hydrocarbon dew point and the more condensate flowrate was achieved. indohoki77 adalah salah satu platform judi online terkemuka yang menyediakan berbagai jenis permainan bagi para penggemar judi di Indonesia.The highest power generation can be gained at low hot gas flow ratio which also influenced the exit pressure and temperature of compressor. In pipeline simulation, the pressure and temperature drop occurred at the high hot gas rate. To examine the arrival condition, dew point curves were generated and showed that the limitation of hot gas flow ratio has to be below 0.6 to prevent heavy hydrocarbon condensation in pipeline.

EVALUASI KINERJA ALAT PENUKAR PANAS 11-E-107 PADA UNIT DISTILASI MINYAK MENTAH (CDU) Alhanif, Misbahudin; Frastia, Wike; Kamil, Muhamad Idham; Kumoro, Andri Cahyo; Yusupandi, Fauzi; Utami, Esti; Saputri, Desi Riana; Fahni, Yunita
DISTILAT: Jurnal Teknologi Separasi Vol. 10 No. 2 (2024): June 2024
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/distilat.v10i2.4713

Pemanasan awal pada unit distilasi minyak mentah (CDU) berfungsi menaikkan temperatur minyak mentah sebelum masuk ruang pembakaran (furnace) untuk mengurangi beban kerja dari furnace. Pemanasan awal dilakukan dengan bantuan alat penukar panas 11-E-107. Tujuan penelitian ini adalah melakukan evaluasi alat penukar panas 11-E-107 berdasarkan parameter faktor pengotor (fouling factor, Rd), penurunan tekanan (pressure drop, ∆P), dan efisiensi. Evaluasi dilakukan melalui pengumpulan data aktual berupa laju alir dan suhu fluida panas (atmospheric residue) dan fluida dingin (desalted crude oil) selama bulan Juni 2023. Analisis hasil perhitungan dilakukan dengan membandingkan antara hasil perhitungan (Rd, ∆P, dan efisiensi) terhadap data desain. Hasil penelitian menunjukkan bahwa nilai Rd dari data aktual berkisar antara 0,0006 – 0,0014 hr.ft2.oF/Btu, lebih kecil dibandingkan data desain. Hasil analisis penurunan tekanan (∆P) pada shell dan tube berada pada rentang 0,1046 – 0,1305 dan 0,1031 – 0,1352 psi, lebih kecil dibandingkan allowable pressure drop. Efisiensi dari alat penukar panas 11-E-107 berada di antara 87,60 - 91,30%. Secara keseluruhan, kinerja alat penukar panas 11-E-107 dalam kondisi yang baik. Perawatan berkala perlu dilakukan jika efisiensi alat penukar panas berada pada nilai kurang dari 80%.

Perkembangan concentrated solar cells (CSC) untuk meningkatkan efisiensi energi matahari menuju energi bersih dan berkelanjutan Yusuf, Reggina Aulia; Setianingsih, Putri Indah Ayu; Hernawan, Ashilah Diandra; Deviany, Deviany; Yusupandi, Fauzi; Suryanto, Ido; Armanda, Selvy; Yusadetama, Ega Amoret; Corrysha, Jihan Luthfi; Nugraha, Dea Amanda; Afriliza, Tiara Fitri; Alhanif, Misbahudin
JITEL (Jurnal Ilmiah Telekomunikasi, Elektronika, dan Listrik Tenaga) Vol. 4 No. 3: September 2024
Publisher : Jurusan Teknik Elektro, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/jitel.v4.i3.2024.195-208

Dalam upaya mengurangi ketergantungan terhadap energi fosil, sel surya menjadi salah satu potensi energi terbarukan yang menjanjikan, terutama di wilayah dengan intensitas cahaya matahari yang tinggi seperti di Indonesia. Berbagai jenis sel surya telah banyak dikembangkan, mulai dari generasi pertama hingga generasi ketiga sebagai era baru dalam perkembangan teknologi sel surya. Concentrated Solar Cell (CSC) memunculkan harapan baru dalam pemanfaatan energi surya. Konsep dasar CSC melibatkan penggunaan lensa atau cermin konsentrator untuk meningkatkan intensitas cahaya matahari yang mencapai sel surya. Dengan memanfaatkan efek fotovoltaik pada material semikonduktor, CSC dapat meningkatkan efisiensi konversi energi matahari menjadi listrik. Mekanisme kerja CSC tidak hanya mengurangi jumlah sel yang diperlukan, tetapi juga memungkinkan desain multi-junction tandem yang lebih efisien, menggunakan bahan dan proses produksi yang umumnya mahal namun menjadi lebih terjangkau melalui penggunaan CSC. Berdasarkan ulasan analisis siklus hidup (LCA) yang dilakukan beberapa peneliti, CSC menunjukkan keunggulan dalam pengurangan material terbatas, seperti germanium (Ge) dan gallium (Ga), yang mendukung keberlanjutan pada skala besar. Keunggulan ini memberikan gambaran lebih luas tentang dampak positif CSC terhadap penurunan ketergantungan pada sumber daya yang langka dan peningkatan keberlanjutan di sektor energi.

Pelatihan Optimalisasi Proses Produksi Minyak Kayu Putih Berbasis Green Technology di Unit Pertanian Koperasi Pondok Pesantren (Koppontren) Al-Fatah, Lampung Selatan Sufra, Rifqi; Darojat, Yusron; Nareswari, Tantri Liris; Alhanif, Misbahudin; Yusupandi, Fauzi
Jurnal Kreativitas Pengabdian Kepada Masyarakat (PKM) Vol 8, No 3 (2025): Volume 8 No 3 (2025)
Publisher : Universitas Malahayati Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jkpm.v8i3.18305

ABSTRAK Tanaman kayu putih (Melaleuca cajuputi) merupakan tanaman produksi hasil hutan bukan kayu yang pada umumnya dimanfaatkan daunnya untuk menghasilkan minyak kayu putih. Pengrajin minyak atsiri di Koperasi Pondok Pesantren (KOPPONTREN) Al-Fattah, Desa Negara Ratu Kecamatan Natar Kabupaten Lampung Selatan yang merupakan mitra pengabdian telah melakukan usaha pengolahan minyak kayu putih melalui penyulingan sederhana. Namun, rendemen yang dihasilkan hanya berkisar 0,6 – 0,7%. Selain itu, timbulnya limbah hasil pengolahan, murahnya harga jual karena kualitas yang belum baik dan kurangnya pemasaran produk melatarbelakangi kegiatan pengabdian kepada Masyarakat (PkM) ini. Pada kegiatan ini dilakukan peningkatan kualitas produk minyak kayu putih melalui pembuatan alat redistilasi. Sosialiasi pengolahan limbah padat dan cair dalam reaktor SSF Constructed Wetland dengan tanaman rumput wlingi juga dilakukan. Selain itu, pelatihan pemasaran secara digital dan pembuatan desain kemasan dilakukan sebagai pelengkap kegiatan PkM ini. Secara keseluruhan, hasil pelatihan menunjukkan bahwa 86% peserta mengalami peningkatan kemampuan yang signifikan dengan nilai post-test rata-rata 83,8. Hasil ini cukup menggembirakan yang artinya pelaksanaan kegiatan sosialisasi dan praktek penyulingan minyak kayu putih, pengolahan limbah cair dan padat, serta branding produk mampu diikuti dengan baik oleh mitra. Kata Kunci: Branding Produk, Minyak Kayu Putih, Pengolahan Limbah, Redistilasi. ABSTRACT The eucalyptus plant (Melaleuca cajuputi) is a non-timber forest product that is generally utilized for its leaves to produce eucalyptus oil. Essential oil craftsmen at the Al-Fattah Islamic Boarding School Cooperative (KOPPONTREN), Negara Ratu Village, Natar District, South Lampung Regency, who are our service partners, have been processing eucalyptus oil through simple distillation. However, the produced yield is only around 0.6–0.7%. Additionally, the generation of processing waste, the low selling price due to poor quality, and the lack of product marketing are the reasons behind this Community Service (PkM) activity. This activity improved the quality of eucalyptus oil products by creating a redistillation device. Socialization of solid and liquid waste treatment in the SSF Constructed Wetland reactor with wlingi grass plants was also conducted. In addition, digital marketing training and packaging design creation were conducted as a complement to this PkM activity. Overall, the training results show that 86% of participants experienced a significant improvement in their abilities, with an average post-test score of 83.8. This result is quite encouraging, meaning that the implementation of socialization activities and practices of eucalyptus oil distillation, liquid and solid waste processing, as well as product branding, can be well followed by partners. Keywords: Product Branding, Eucalyptus Oil, Waste Processing, Redistillation.

Heavy hydrocarbon recovery with integration of turboexpander and JT valve from highly CO2-containing natural gas for gas transmission pipeline Yusupandi, Fauzi; Widiatmoko, Pramujo; Sukmana, Ira Febrianty; Fitri, Hera Rahma; Eviani, Mitra; Devianto, Hary
Jurnal Rekayasa Proses Vol 17 No 2 (2023): Volume 17, Number 2, 2023
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.82485

Demand of natural gas is predicted to increase since many valuable products can be produced. Water and heavy hydrocarbon content are the key for gas pipeline facility. To meet requirement of natural gas transportation, dehydration unit (DHU) and hydrocarbon dew point control unit (DPCU) are necessary to avoid water and hydrocarbon condensation during transmission. The conventional dehydration technology, TEG contactor, can lower water content from 1,304 mg/m3 to 80.35 mg/m3 where the maximum limit of water content in natural gas is 97 mg/m3 to prevent hydrate formation. DPCU is installed to remove heavy hydrocarbon, especially C5+. Integration of JT valve and turboexpander was employed to obtain the low gas dew point. The hot gas stream that entered the JT valve was observed. The lower hot bypass gas was applied, the lower hydrocarbon dew point and the more condensate flowrate was achieved. The highest power generation can be gained at low hot gas flow ratio which also influenced the exit pressure and temperature of compressor. In pipeline simulation, the pressure and temperature drop occurred at the high hot gas rate. To examine the arrival condition, dew point curves were generated and showed that the limitation of hot gas flow ratio has to be below 0.6 to prevent heavy hydrocarbon condensation in pipeline.

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