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All Journal Jurnal Teknik Kimia USU Jurnal Media Infotama Jurnal Pangan dan Agroindustri Sriwijaya International Seminar on Energy-Environmental Science and Technology Indonesian Journal of Chemical Science JURNAL PENDIDIKAN TAMBUSAI Kinetika Jurnal Pendidikan dan Teknologi Indonesia Teknika Sains : Jurnal Ilmu Teknik Jurnal Teknologi Chemical Engineering Journal Storage (CEJS) Jurnal Teknik Kimia USU Jurnal Teknologi Kimia Unimal JURNAL TEKNOLOGI PANGAN DAN ILMU PERTANIAN (JIPANG) Jurnal Riset Rumpun Ilmu Teknik (JURRITEK) Innovative: Journal Of Social Science Research Journal Serambi Engineering (JSE) J-CEKI Jurnal Teknologi Riset Terapan
Erwana Dewi
Politeknik Negeri Sriwijaya
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation Other

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Journal : Serambi Engineering

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Pengurangan Kadar Ammonia dalam Limbah Cair Pupuk pada Jet Bubble Column Menggunakan NaOH Adis Aisyah Amini; Indah Purnamasari; Erwana Dewi
Jurnal Serambi Engineering Vol. 10 No. 2 (2025): April 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

As a developing country, Indonesia is experiencing continuous industrial growth, including the urea fertiliser industry. The presence of the urea fertilizer industry produces wastewater containing ammonia pollutants, a primary component in the manufacture of fertilizers. Wastewater containing ammonia is discharged into rivers, polluting the environment and affecting living organisms both directly and indirectly. The aim of this study is to reduce the ammonia levels in the fertiliser effluent and to monitor the effect of the added NaOH solvent using a Jet Bubble Column. The reduction of ammonia levels in the wastewater was carried out by adding 0.3 M NaOH solvent to 1 litre of wastewater at a liquid flow rate of 0.9 litre/minute with varying air flow rates of 8 litre/minute and 12 litre/minute and temperatures of 35°C, 40°C, 45°C, 50°C and 55°C over an operating time of 60 minutes. The samples were analysed using Nessler UV/Vis spectrophotometry at a wavelength of 460 nm, and the mass transfer coefficient (kLa) and efficiency of ammonia reduction by the Jet Bubble Column were calculated. The highest efficiency obtained was 68.75%, reducing 434.214 ppm in 60 minutes at an air flow rate of 12 litres/minute and a temperature of 55°C. Higher flow rates and temperatures resulted in greater reductions, with the highest kLa being 1,074.
Sintesis Gliserol Stearat Dari Gliserol Produk Industri Minyak Kelapa Sawit Untuk Proses Inhibitor Korosi Wijaya, Ariyanto Hadi; Aznury, Martha; Dewi, Erwana
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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This study aims to synthesize glycerol stearate from palm oil industrial products and test its effectiveness as a corrosion inhibitor on aluminum metal. The synthesis was carried out through an esterification reaction between glycerol and stearic acid using a sulfuric acid catalyst at a temperature of 120°C with a reaction time variation of 120–220 minutes. The synthesized products were characterized using Thin Layer Chromatography (TLC) and Gas Chromatography–Mass Spectrometry (GC-MS) methods. The inhibitor effectiveness test was carried out using a gravimetric method based on the ASTM G31-21 standard in 1 M HCl solution. The results showed an optimum reaction time of 180 minutes with a yield of glycerol monostearate of 16.36%. TLC showed the highest Rf value close to the glycerol monostearate standard, while GC-MS detected the main compounds in the form of glycerol monopalmitate and glycerol monostearate. Effectiveness testing showed that the coating method produced an inhibition efficiency of 76.89%, higher than the direct mixing method of 73.69%. These results indicate that glycerol stearate has the potential to be an effective and environmentally friendly corrosion inhibitor based on biodiesel waste.
Co-Authors A.S, Putu Yoga Abdurrahman, RM Arif Abu Hasan Abu Hasan Adelia Rahmayanti Adis Aisyah Amini Akbar, Kiki Amin, Jaksen M. Anerasari M Anerasari Meidinariasty Anerasari Meidinariasty Anerasari, Anerasari Anggraini, Sartika Anhar Anhar Az’zahrah, Nandyta Rizqi Dadang S Manaf Didiek Hari Nugroho Dytha Florenza Fadia, Dinda Gading Ananda Putra Pratama INDAH PURNAMASARI Indah Purnamasari Indah Purnamasari Ir. M.T Erlinawati Irawan, Dewanda Jaksen M.A Joan Nasya Alzena Jonathan P Silalahi Julyantiya, Robby Try Kurniawan, Belly Martha Aznury Maryani, Andini Mentari, Inez Artemisia Muhammad Ridho Triadi Muhammad Yerizam Muhammad Yerizam Mustain Zamhari Mustain Zamhari Mustain Zamhari Nabillah, Afrah Ningsih, Sintya Nyayu Fia Atindu Nyayu Fia Atindu Pebriana, Maha Rani Putri, Astri Oktaviana Rahma Aji Kurniawan Ramayanti, Cindi Riki Wahyudi, Riki Riko, Muhamad Robert Junaidi Robert Junaidi Robert Junaidi Samosir, Martin Josep Sari Rizky Amelia Sari Rizky Amelia Selastia Yuliati Selastia Yuliati Selvia Sintia Muharani SITI KHODIJAH Taufik Jauhari Utama, Wahyu Vina Oktarianti Vinni Nursyifah Wijaya, Ariyanto Hadi Wijaya, Olvie Zahroh Yudis Afrizal Yuliani, Aliyah Yuniar Yuniar Yuniar Zain, Raina Khoirunisa