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All Journal KOVALEN: Jurnal Riset Kimia Chimica et Natura Acta Dalton : Jurnal Pendidikan Kimia dan Ilmu Kimia FLUIDA Kumawula: Jurnal Pengabdian Kepada Masyarakat International Journal of Applied Technology Research Jurnal Teknik Kimia dan Lingkungan Serambi Engineering Advance Sustainable Science, Engineering and Technology (ASSET)
Robby Sudarman
Jurusan Teknik Kimia, Politeknik Negeri Bandung
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Journal : FLUIDA

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Penyisihan Kadar Amoniak dalam Limbah Cair Industri Pupuk Menggunakan Sequencing Batch Reactor Robby Sudarman; Herawati Budiastuti; Nancy Siti Djenar; Efniarsi S. Panggalo; Ajie Nurhasyim
Fluida Vol 13 No 2 (2020): FLUIDA
Publisher : Jurusan Teknik Kimia, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v13i2.2264

Abstract

ABSTRAK Sifat toksik nitrogen amoniak dalam limbah cair berbahaya bagi kehidupan sehingga perlu untuk dihilangkan. Pada penelitian ini penyisihan kadar amoniak yang tinggi dalam limbah cair industri pupuk dilakukan melalui proses nitrifikasi dan denitrifikasi menggunakan Sequencing Batch Reactor (SBR). Dua reaktor SBR digunakan dimana pada reaktor pertama (R1) dilakukan pengadukan dan pada reaktor kedua (R2) dilakukan aerasi. Hasil penelitian menunjukkan bahwa pada pembebanan 0,787 mg amoniak/L/hari dan Hydraulic Retention Time (HRT) 20 hari, efisiensi penyisihan kadar amoniak mampu dicapai pada kisaran 71,26%-90,91% (R1) dan 62,32% -92,21% (R2). Pengukuran pH pada HRT 20 hari berada pada rentang 8,25-8,65 pada R1 dan pH 8,34-8,73 pada R2. Pada HRT 15 hari, efisiensi penyisihan kadar amoniak efluen pada R1 menurun yaitu dari 90,89 % menjadi 86,81% dan pada R2 menurun dari 90,59% menjadi 40,99 %. Pada HRT 15 hari, efisiensi penyisihan kadar amoniak pada R1 lebih baik dibandingkan pada R2 yang disebabkan adanya penambahan aerasi pada R1 di akhir penelitian. Kata kunci: amoniak, limbah cair, industri pupuk, sequencing batch reactor ABSTRACT The toxic nature of ammonia nitrogen in liquid waste is dangerous for life, so it needs to be eliminated. In this study, the removal of high ammonia levels in the fertilizer industry wastewater was carried out through a process of nitrification and denitrification using the Sequencing Batch Reactor (SBR). Two SBR reactors were used where the first reactor (R1) was stirred and the second reactor (R2) was aerated. The results showed that at a load of 0.787 mg of ammonia/L/day and 20 days of Hydraulic Retention Time (HRT), the efficiencies of removal of ammonia levels were achieved in the range of 71.26%-90.91% (R1) and 62.32%- 92.21% (R2). The pH measurements at 20 days of HRT were in the range of 8.25-8.65 at R1 and pH 8.34-8.73 at R2. At 15 days of HRT, the effluent ammonia level removal efficiency at R1 decreased from 90.89% to 86.81% and at R2 decreased from 90.59% to 40.99%. At 15 days of HRT, the efficiency of ammonia level removal at R1 was better than that in R2 due to the addition of aeration to R1 at the end of the study. Keywords: ammonia, liquid waste, fertilizer industry, sequencing batch reactor
Pengaruh Suhu Proses Sokletasi dan Volume Pelarut n-heksana terhadap Yield Minyak Atsiri Jeruk Lemon Fania Zulfa Salsabila; Rosyidah Khoirunnisa Mahdan; Ghusrina Prihandini; Robby Sudarman; Fitria Yulistiani
Fluida Vol 15 No 2 (2022): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v15i2.4409

Abstract

Essential oils are volatile compounds found in lemon peels. Essential oils are used in addition to soaps, perfumes, and candles because of their fresh aroma. Essential oils can be extracted using solid-liquid extraction. Soxhlet extraction was chosen because the process is continuous and requires less solvent than the percolation method. The solvent N-Hexane was chosen because its polar value was close to the polarity of the essential oil. Soxhlet extraction was carried out with variations in process temperature (70, 75, and 80°C) and solvent volume (16, 240, and 320ml). Previously, the lemon peel was pre-treated by drying (<100°C, 1 hour) and grinding. After extraction, the essential oil was added with anhydrous (Na2SO4). The best results were obtained at a process temperature of 80°C and a solvent volume of 320 ml yielding 3.25%. The increase in process temperature and solvent volume increases the yield of essential oils. Based on the results of the GC-MS analysis, lemon essential oil contains limonene (41.06%) and citral (12.2%). The content of limonene gives the aroma, and the content of citral gives color to the lemon essential oil. Abstrak Minyak atsiri merupakan senyawa volatile yang banyak ditemukan pada kulit jeruk lemon. Minyak atsiri digunakan sebagai tambahan sabun, parfum, dan lilin karena aromanya yang segar. Minyak atsiri dapat diambil menggunakan ekstraksi padat-cair. Ekstraksi sokletasi dipilih karena prosesnya kontinyu dan membutuhkan lebih sedikit pelarut dibandingkan metode perkolasi. Pelarut N-Heksana dipilih karena nilai polarnya mendekati kepolaran minyak atsiri. Ekstraksi sokletasi dilakukan dengan variasi suhu proses (70, 75, dan 80°C) dan volume pelarut (160, 240, dan 320ml). Sebelumnya dilakukan pre-treatment pada kulit jeruk lemon berupa pengeringan (<100°C, 1jam) dan penghalusan. Setelah diekstraksi, minyak atsiri diberi tambahan anhidrat (Na2SO4). Hasil terbaik diperoleh pada suhu proses 80°C dan volume pelarut 320 ml dengan hasil yield 3,25%. Peningkatan suhu proses dan volume pelarut meningkatkan yield minyak atsiri. Berdasarkan hasil analisis GC-MS minyak atsiri jeruk lemon mengandung limonene (41,06%), dan citral (12,2%). Kandungan limonene memberikan aroma dan kandungan citral memberikan warna pada minyak atsiri jeruk lemon.
Seeding and Acclimatization for Aerobic Processing of Restaurant Wastewater with Sequencing Batch Reactor Herawati Budiastuti; Laily Isna Ramadhani; Sudrajat Harris Abdulloh; Ananda Dea Maharani; Melina Melina; Robby Sudarman
Fluida Vol 16 No 1 (2023): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v16i1.4521

Abstract

Restaurant wastewater has a relatively high organic matter content, so it needs to be treated to meet the specified quality standard. One of the technologies that can be used in restaurant wastewater treatment is Sequencing Batch Reactor (SBR) technology. The purpose of this study is to set up an aerobic SBR system with seeding and acclimatization treatments to reduce the amount of organic matter in restaurant wastewater when a shock load occurs. The research was done using wastewater from a restaurant in Bandung and activated sludge from the food industry in Bogor as seeds for microorganisms. In this study, the seeding process was carried out by introducing 25% activated sludge and 75% nutrients into the reactor, and the acclimatization process was carried out by introducing a specific ratio of nutrients and wastewater into the reactor gradually until the waste concentration reached 100%. The parameters tested were COD, MLVSS, DO, pH, and temperature. During the seeding procedure, the initial COD value of 3,200 mg/L declined. It began to stabilize on the seventh day, with a COD value of 1,080 mg/L. The COD removal reached a relatively stable condition in the acclimatization process starting on day 2, where COD decreased from the original 1,280 mg/L to 480 mg/L.
Effect of Phosphate Concentration on Anodizing Process Efficiency and Aluminium Surface Hardness in 16% Sulfuric Acid Solution Sudarman, Robby; Indarti, Retno; Nurcahyo, Nurcahyo; Fauzan, Ahmad; Ngatin, Agustinus; Sihombing, Rony Pasonang
Fluida Vol. 17 No. 1 (2024): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v16i2.4461

Abstract

One of the problems the aircraft industry faces is equipment that has decreased performance in the period before planning. The solution to this condition is that a material that has hard properties and is corrosion-resistant is needed. Aluminium is a metal that is applied as equipment in the industry because it has the characteristics of being light, strong, corrosion resistant and easy to shape, but has properties that are easy to deform, have low hardness and wear resistance. Anodizing process has the characteristics to improve the surface properties of aluminium metal in physical and mechanical properties. The anodizing process of aluminium metal using sulfuric acid solution produces a thicker oxide layer than in other solutions, such as phosphoric acid solution. This research studied the effect of phosphoric acid concentration on process efficiency, oxide layer thickness, and the hardness of the anodized oxide layer in 16% sulfuric acid solution. Phosphoric acid solution concentration varied from 0; 0.5; 1;2;4; and 8% in 16% sulfuric acid solution at 5 Volts voltage or 1.12 A/dm2 current density with 25 minutes processing time. The results showed that the anodizing process in 16% sulfuric acid solution had the lowest efficiency of 19.3% after adding variations in the concentration of phosphoric acid. These conditions reached the optimum in 16% sulfuric acid solution with the addition of 1% phosphoric acid; 26.6 mg oxide mass; 50.33% efficiency; 90.48 mg/dm2 oxide layer thickness and 86.57 HV metal surface hardness
Co-Authors Abdul Haris Watoni Ahmad Fauzan Ahmad Zaeni, Ahmad Ahmad, La Ode Ajie Nurhasyim Alisya Nurbaits Alwahab Alwahab Ananda Dea Maharani Apriyanti, Fitri Bambang Soeswanto Budi Mandra Harahap Budi Mandra Harahap Budiastuti, Herawati - Dea Tesalonika Sitorus Dea Tesalonika Sitorus Diana Murti Indra Wahyuni Diana Murti Indra Wahyuni Dianty Rosirda Efniarsi S. Panggalo Evy Nuryah Adha Fania Zulfa Salsabila Fildzah Sajidah Fildzah Sajidah Herawati Budiastuti Husaeni, Yusuf Ahmad Indarti, Retno Istianandar, Muhammad Iqbal Sya'bani Jayanti, Retno Dwi La Ode A. Nur Ramadhan La Ode Ichlas Syahrullah Yunus Melina Melina Muhari, Emma Hermawati Nancy Siti Djenar Ngatin, Agustinus Ninik Lintang Edi Wahyuni Nurazizah, Annisa Nurcahyo Nurcahyo, Nurcahyo Paramitha, Tifa Permanasari, Ayu Ratna Prihandini, Ghusrina Pullammanappalil, Pratap Ramadhani, Laily Isna Retno Indarti Rifadil, Mochammad Machmud Rosyidah Khoirunnisa Mahdan Sihombing, Rony Pasonang Sudrajat Harris Abdulloh Suryadi, Joko Unung Leoanggraini Wa Ode Novi Haryanti WAHYU WIBISONO Yulistiani, Fitria Yunus Tonapa Sarungu