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All Journal Rotasi Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Teknik Kimia USU JURNAL INTEGRASI PROSES Teknika: Jurnal Sains dan Teknologi JURNAL KESEHATAN LINGKUNGAN (Journal of Environmental Health) Jurnal Ilmiah Universitas Batanghari Jambi QARDHUL HASAN: MEDIA PENGABDIAN KEPADA MASYARAKAT Jurnal Kreativitas PKM Jurnal Inovasi Teknik Kimia Jurnal Civronlit Unbari Jurnal Engineering AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) International Journal of Research in Vocational Studies (IJRVOCAS) Jurnal Teknik Kimia USU Jurnal Talenta Sipil Hexatech: Jurnal Ilmiah Teknik Seminar Nasional Insinyur Profesional (SNIP) Jurnal Ilmiah Teknik dan Sains (JITS)
Rifqi Sufra
Institut Teknologi Sumatera
Aerospace Engineering 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 Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Transportation Other

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Analysis of Carbon Monoxide (CO) Quality Due to the Construction of the Miftahun Najah Islamic Boarding School Muhamad Fadli; Peppy Herawati; Hadrah; Endi Adriansyah; Rifqi Sufra; Muhammad Syaiful
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 2 No. 2 (2022): IJRVOCAS - August
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v2i2.101

Abstract

Air pollution comes from construction activities in the development of educational infrastructure buildings because it has an impact on changes in green open space and an increase in air pollution, especially Carbon Monoxide (CO) emissions in the air. The contribution of increasing CO2 and CO emissions can be sourced from all activities of workers who use energy such as procurement of building materials, use of transportation fuels, electricity use activities, and LPG use activities. Carbon footprint is a measure of the total amount of carbon dioxide (CO2) emissions that come from activities or accumulations from daily activities. This study aims to determine the amount of carbon Monoxide (CO) and CO2 emissions as indicators of air quality at the Miftahun Najah Islamic Boarding School. Measurement of Carbon Monoxide (CO) parameters was carried out for one week with 7 samplings in the morning and samplings in the afternoon in situ. Measurements using the Lutron GCO-2008 CO meter and carbon footprint calculations using the IPCC 2006 method. The measurement results were obtained in the afternoon with a total of 9,926 mg/Nm3 and the lowest in the morning was 1,102 mg/Nm3. Air temperature in the morning to evening ranged from 29oC – 36oC. The results showed that the concentration of Carbon Monoxide in the development of Islamic boarding school buildings was still below the quality standards set according to Government Regulation No. 22 of 2021, namely10,000 μg / Nm3.
Potential Sequencing Batch Reactor in Leachate Treatment for Organic and Nitrogen Removal Efficiency Hariestya Viareco; Endi Adriansyah; Rifqi Sufra
JURNAL KESEHATAN LINGKUNGAN Vol. 15 No. 2 (2023): JURNAL KESEHATAN LINGKUNGAN
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkl.v15i2.2023.143-151

Abstract

Introduction: Landfill wastewater or leachate has unique characteristics. Several conventional methods need a few treatment tanks to cover the treatment process. A Sequencing Batch Reactor (SBR) is a biological treatment method that uses a single tank with few-cycle phases. This study aims to determine the potential of a Sequencing Batch Reactor (SBR) that can be used to treat landfill leachate. Methods: A Sequencing Batch Reactor (SBR) was used in this study. The characteristics of leachate served as the basis for the design of the SBR reactor. The synthetic leachate was used to create the reactor feed based on the actual landfill leachate compositions. The reactor's influent and effluent were analyzed based on a few parameter changes, such as Suspended Solid (SS), Chemical Oxygen Demand (COD), ammonia nitrogen (NH3-N), and Total Kjeldahl Nitrogen (TKN). Results and Discussion: While the experiment was running, 84% of SS were removed, 88% of COD were removed, a -28% efficiency rate for NH3-N removal, and a -172% efficiency rate for TKN removal. After the withdrawal phase, the supernatant showed promising results with 99% COD removal, 97% SS removal, and 65% TKN removal. Unfortunately, the removal of NH3-N reaches -130%. It indicates insufficient concentrations of MLSS and SRT, as well as the presence of a eutrophication process. Conclusion: SBR shows a promising result for leachate treatment. Few changes in the cycling process were needed for further study, so the treatment process becomes optimal to reach its full potential.
Pemanfaatan Sisa Kulit Kayu sebagai Karbon Aktif dalam Pengolahan Air Lindi Industri Pulp and Paper Rifqi Sufra; Latifah Latifah; Nurul Ajeng Susilo; Endi Adriansyah; Luki Anugrah Wati; Astri Yulia; M. Syaiful; Hariestya Viareco; Marhadi Marhadi; Muhammad Abdul Ghony; Peppy Herawati
Jurnal Civronlit Unbari Vol 8, No 1 (2023): April
Publisher : Universitas Batanghari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/civronlit.v8i1.106

Abstract

The pulp and paper industry produces the remaining bark as solid waste, where this solid waste pile when it rains will produce leachate that seeps into the ground, causing soil and groundwater pollution. This wood waste can be used as activated carbon (adsorbent) for leachate treatment. The research was divided into two stages, namely adsorbent production and leachate treatment. Production of activated carbon from bark (bark) was activated using a solution of NaOH and H2SO4 as an activator, with variations of bark (gr): activator (ml) = 20:100; 50:200; 70:300. The leachate adsorption process used activated carbon with a mass of 2.5 and 5 g for 30, 60 and 120 minutes. The lowest adsorbent water content was 0.87% activated using NaOH, and the lowest ash content 0.79% when activated with H2SO4. This is still in accordance with the SII standard No.0258-88. The best variation occurred when the addition of activated carbon which was activated using 5 grams of H2SO4 for 120 minutes caused the most significant decrease in COD value of 52%, and pH 7.32. From the variations in the activation of activated carbon adsorbents, the activation of acidic solutions is better in leachate treatment.
Karbon aktif dari limbah kulit kayu sebagai penyerap logam Mangan (Mn) pada Leachate Rifqi Sufra; Endi Adriansyah; Luki Anugrah Wati
Hexatech: Jurnal Ilmiah Teknik Vol. 2 No. 1 (2023): Hexatech: Jurnal Ilmiah Teknik
Publisher : ARKA INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55904/hexatech.v2i1.673

Abstract

Leachate adalah cairan berbahaya yang dihasilkan oleh air hujan atau air tanah yang merembes melalui sampah organik atau limbah lainnya, melepaskan bahan kimia yang terkandung, termasuk logam berat dan senyawa organik, yang dapat mencemari tanah dan air disekitarnya. Adsorben, seperti karbon aktif, zeolit, dan tanah liat pilihan, biasanya digunakan untuk menghilangkan kontaminan dari lindi atau air limbah lainnya. Penelitian ini bertujuan untuk mengetahui manfaat karbon aktif dari limbah kulit kayu untuk menyerap logam berat khususnya mangan (Mn) dari lindi. Hasil penelitian menunjukkan bahwa karbon yang diaktivasi dengan H2SO4 memiliki pori yang lebih besar dibandingkan dengan yang diaktivasi dengan NaOH, dan dapat secara efektif menyisihkan hingga 94 persen kandungan Mn dalam lindi. Pemanfaatan limbah kulit kayu untuk pembuatan karbon aktif merupakan solusi pengelolaan limbah berkelanjutan yang dapat mengurangi dampak negatif limbah kayu terhadap lingkungan.
Pengaruh penambahan koagulan terhadap laju sedimentasi pada proses sedimentasi larutan tepung maizena Yunita Fahni; Rifqi Sufra; Ihsan Maulana Ahmad; Syalsa Fadhilah
Hexatech: Jurnal Ilmiah Teknik Vol. 2 No. 1 (2023): Hexatech: Jurnal Ilmiah Teknik
Publisher : ARKA INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55904/hexatech.v2i1.704

Abstract

Proses sedimentasi batch sangat berperan penting dalam industri, seperti pada proses pemurnian air limbah, pengolahan air sungai pengendapan kristal dari lautan induk, dan lain-lain. Proses batch sering dilakukan dalam proses komersial dengan mempertimbangkan kecepatan pengendapan terminal terminal dan partikel-partikelnya. Pada penelitian ini akan dilakukan studi berkaitan dengan pengaruh penambahan koagulan (tawas) terhadap laju sedimentasi pada berbagai variasi konsentrasi larutan tepung maizena yang berbeda. Tawas sebagai koagulan terbukti mampu membuat proses sedimentasi lebih efisien, yaitu dengan mempercepat laju sedimentasi. Penambahan koagulan pada setiap variasi konsentrasi menghasilkan laju sedimentasi yang lebih besar. Koagulan sendiri memiliki fungsi untuk menggumpalkan partikel-partikel maizena dimana digunakan untuk memperberat massa pertikel sehingga membuat laju sedimentasi lebih cepat. Adapun pengaruh dari variasi konsentrasi terhadap laju sedimentasi, bahwa semakin besar konsentrasi slurry maka kecepatan pengendapannya akan semakin rendah. Hal ini dikarenakan fenomena hindered settling yaitu saat partikel-partikel maizena mulai bergesekan yang menyebabkan waktu sedimentasi lama sehingga untuk mencapai dasar dari tabung sedimentasi.
Limbah jerami padi sebagai sumber N, P, dan K organik dalam pembuatan pupuk untuk produksi tanaman bayam (Amaranthus Sp.) Misbahudin Alhanif; Woro Astuti; Permadi Wardani; Rifqi Sufra; Wika Atro Auriyani
Hexatech: Jurnal Ilmiah Teknik Vol. 2 No. 1 (2023): Hexatech: Jurnal Ilmiah Teknik
Publisher : ARKA INSTITUTE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55904/hexatech.v2i1.709

Abstract

Indonesia adalah negara agraris yang memiliki hasil pertanian melimpah, salah satunya bayam. Akan tetapi, petani bayam masih diikuti oleh banyak kendala seperti teknis budidaya, hama dan penyakit, pupuk hingga pemasaran hasil panen yang masih tradisional. Disisi lain, potensi limbah jerami padi yang melimpah memiliki unsur hara penting yang dibutuhkan oleh tanaman, seperti Si (Silika), K2O (Kalium Oksida), P2O5 (Potassium Pentaoksida dan N (Nitrogen). Unsur-unsur tersebut akan hilang apabila dilakukan pembakaran. Oleh karena itu, penelitian ini ditujukan untuk ekstraksi unsur hara limbah jerami padi dan memanfaatkannya sebagai sumber N, P, dan K organik dalam pembuatan pupuk cair. Penelitian ini memberikan hasil bahwa semakin lama waktu ekstraksi, dapat menghasilkan unsur hara yang lebih tinggi sehingga berpengaruh positif terhadap pertumbuhan tanaman bayam. Selain itu, pupuk organik cair komersial secara kimia memiliki kandungan nitrogen tinggi. Namun, pupuk cair dari limbah jerami juga memiliki potensi yang besar sebagai pupuk organik karena memiliki kandungan fosfor dan kalsium yang tinggi.
Advanced Treatment of Tofu Wastewater using Multilevel Filtration and TiO2 Photocatalysis as Promising Approach for Effective Wastewater Remediation Endi Adriansyah; Marhadi Marhadi; Peppy Herawati; Hariestya Viareco; Rifqi Sufra; Tuty Emilia Agustina
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 3 (2023): November 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i3.560-571

Abstract

Tofu production is known to generate large amounts of wastewater containing a variety of organic compounds, chemicals, and potentially hazardous substances. It is very important to apply proper treatment of harmful substances that impact this wastewater. The aim of this study is to explore advanced techniques for treating tofu wastewater by combining multilevel filtration and TiO2 photocatalysis methods. To evaluate the efficiency of the treatment process, influent and effluent parameters, including pH, total suspended solids (TSS), and chemical oxygen demand (COD), are carefully monitored and measured. The results clearly demonstrate the impressive removal efficiency achieved through the combined use of multilevel filtration and TiO2 photocatalysis in treating tofu wastewater. The treated wastewater showed a promising efficiency in pH (100%), a significant decrease in TSS (40%), and COD (72%). the final measurements of pH met the standards set by government regulations, indicating successful remediation of these specific parameters. Even though TSS and COD haven't met the standard limits, each of them shows a very promising efficiency improvement. Towards the end of this study, it is suggested that the combination of these methods holds promise for effectively remediating tofu wastewater.
Tofu Wastewater Treatment Using Biocoagulant Moringa Seed Powder (Moringa Oleifera L) Nora, Fitrisia; Marhadi; Adriansyah, Endi; Suzana, Asih; Pramono, M. Sidik; Sufra, Rifqi; Syaiful, M.
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 3 No. 3 (2023): IJRVOCAS - December
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v3i3.211

Abstract

Indonesia has various types of vegetation which are used as natural coagulants or biocoagulants. Coagulants can be divided into chemical coagulants and natural coagulants (biocoagulants). Biocoagulants are more environmentally friendly and can be obtained from natural ingredients, both animals and plants, one of which is Moringa seeds. Moringa seeds or with the Latin name Moringa oleifera are a type of plant from the Moringaceae family. From several previous studies, Moringa seeds were used as a more economical and environmentally friendly wastewater treatment method. Moringa seed biocoagulant in powder form is made from ripe and old moringa seeds and contains less than 10% water. Moringa seed biocoagulant contains 4αL-rhamnosyloxy-benzylisothiocyanate and is a determinant of coagulation effectiveness. This active substance is able to absorb pollutants in waste water. This research aims to treat tofu waste with moringa seed biocoagulant in reducing pollutant parameters, namely TSS (Total Suspended Solid) and COD (Chemical Oxygen Demand). Results of the removal of pollutants from moringa seed powder biocoagulant in tofu waste water the efficiency value obtained for each TSS parameter, and the COD for the TSS parameter is 54.4%. and for the COD parameter of 14.6%, it can be concluded that the efficiency value for each parameter still does not meet the effectiveness value.
Pengaruh Kenaikan Laju Alir Fluida Panas dan Arah Aliran terhadap Kinerja Plate and Frame Heat Exchanger Achmad, Feerzet; Naldi, Roy; Uzlifah Janah, Dikri; Sufra, Rifqi; Yuniarti, Reni
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.v13i1.14321

Abstract

Plate and Frame Heat Exchanger (PFHE) is a plate and frame type heat exchanger that is efficient and effective in improving energy efficiency. Research using PFHE aims to determine the effect of increasing the flow rate of hot fluid on heat exchanger performance. This research was conducted at a flow rate variation of 0.7 L/min, 0.9 L/min, 1.1 L/min, 1.3 L/min, 1.5 L/min, 1.7 L/min, and 1.8 L/min with 180 seconds of testing each variation and recording data every 2 seconds. The cold fluid used is tap water and the hot fluid used is distilled water. The results showed that with the increase in hot fluid flow rate, the performance of PFHE also increased because the effectiveness of NTU (Ɛ-NTU) increased. The Ɛ-NTU value of unidirectional flow is 25.37% - 44.87% and in the opposite direction 37% - 68.39%. The largest Ɛ-NTU value in the countercurrent flow indicates that the countercurrent flow is more effective than the unidirectional flow. In addition, increasing the flow rate increases the Reynold's number (Nre) and Nusselt's number (Nu) which indicates the greatest convection heat transfer occurs at the highest flow rate.
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

Abstract

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.
Co-Authors A Purba Achmad, Feerzet Adiwibowo, Muhammad Triyogo Ahmad, Ihsan Maulana Aji, Ahmad Frantoni Aksaronas, Zidan Ashri Alhanif, Misbahudin Amini, Fadilah Amsori M.Das Andi Riyanto Andri Sanjaya Angeline Nauli Ari Setiawan Asih Suzana Asih Suzana Asih Suzana Astri Yulia Astuti, Woro Auriyani, Wika Atro Auriyani, Wika Atro Auriyani, Wika Atro Ayrus Suci Ayrus Suci Brama Nalendra Cahyo, Ari Dwi Cahyo, Muhammad Fiqih Nur Damayanti Damayanti Desi Riana Saputri Devia Gahana Cindi Alfian Deviany, Deviany Dian, Saskia Eka Diana Catur Pratiwi Dicky J. Silitonga E Adriansyah Early Akhalisty Inge Abigail Br Simanjuntak Eko Pujiyulianto Endi Adriansyah Faalih Pandu Wicaksono Hadi Fadhilah, Syalsa Fahni, Yunita Fahni, Yunita Fahni, Yunita Fauzi Yusupandi Feerzet Achmad Firjatullah, Ahmad Labib Glen Bower Vebrianto Siregar Hadrah, Hadrah Hariestya Viareco I E Tamba Ihsan Maulana Ahmad Imalia, Calaelma Logys Jabosar Ronggur Hamonangan Panjaitan Khofifah Anggitiya Ningrum Kurniawansyah, Arief Latifah Latifah Listyadevi, Yuniar Luthfia Luki Anugrah Wati Luki Anugrah Wati M P P Simamora M Syaiful M Syaiful M. Syaiful M. Syaiful Marah Hadi Marah hadi MARDIANA Marhadi Marhadi Marhadi Marhadi Marhadi, Marhadi Misbahudin Alhanif Muhamad Fadli Muhammad Abdul Ghony Muhammad Agus Muljanto Muhammad Syaiful Mustafa Mustafa Mutiara Dewi Rukmana, Mutiara Dewi Naldi, Roy Nora, Fitrisia P.T.Z, Luter evons Peppy Herawati Peppy Herawati Permadi Wardani Pradita, Natania Anggreani Pramono, M. Sidik Prasetyo, Tri Wahyu Putri Jesika Adelia Qolbi, M. Khofidul Radinal Rahmadini, Gustia Raqin, M. Rayhan Reni Yuniarti Riztu, Sonia Safitra, Edwin Rizki Sanjaya, Bagus Gelorawan Saputri, Desi Riana Saputri, Desi Riana Sari, Dewi Kurnia Satria, Arysca Wisnu Selvita, Selvita Silvia Devi Eka Putri Silvina, Tris Susilo, Nurul Ajeng Suzana, Asih Syahfutra, Juanda Edo Syahriantoro, Nur Alfi Syalsa Fadhilah Tantri Liris Nareswari Thoriq, Anugrah Tuty Emilia Agustina Uzlifah Janah, Dikri Vania Nur Wahdani Viareco, Hariestya Wardani, Permadi Wari Dony Wati, Luki Anugrah Wika Atro Auriyani Woro Astuti Yuniarti, Reni Yunita Fahni Yusron Darojat Yusupandi, Fauzi Yusupandi, Fauzi