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All Journal Seminar Nasional Teknik Kimia Kejuangan KOVALEN: Jurnal Riset Kimia JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya FLUIDA Fullerene Journal of Chemistry Kumawula: Jurnal Pengabdian Kepada Masyarakat International Journal of Applied Technology Research Industrial Research Workshop and National Seminar
Yunus Tonapa Sarungu
Jurusan Teknik Kimia Politeknik Negeri Bandung
Aerospace Engineering Humanities 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 Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Other

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Pengolahan Air Limbah Industri Tekstil dengan Metoda Elektrokoagulasi Menggunakan Elektroda Besi (Fe) dan Aluminum (Al) Yunus Tonapa Sarungu; Rony Pasonang Sihombing
JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Vol 6, No 2 (2022)
Publisher : State University of Malang or Universitas Negeri Malang (UM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (345.56 KB) | DOI: 10.17977/um0260v6i22022p011

Abstract

Air limbah industri tekstil mengandung bahan pencemar organik maupun anorganik yang dapat ditunjukkan dengan kadar COD dan kekeruhan yang relatif tinggi. Jika air limbah ini langsung dibuang ke lingkungan akan mencemari lingkungan dan membahayakan bagi kesehatan manusia dan makluk hidup yang lain. Pengolahan air limbah industri tekstil dengan metode elektrokoagulasi bertujuan untuk mengganti atau menghemat bahan kimia sebagai koagulan dan flokulan yang dapat menyebabkan pencemaran lingkungan dan harganya terus meningkat. Pengolahan air limbah dengan metode ini dapat menghasilkan air buangan atau efluen pengolahan dengan kadar COD, kekeruhan, logam berat, pH di bawah atau minimal sama dengan baku mutu lingkungan (BML). Hasil penelitian pengolahan air limbah tekstil  menggunakan elektroda Fe dan Al serta SS (Stainless Steel) pada rapat arus 0,25 s.d 1,25 A/dm2 dengan waktu proses 35 menit diperoleh kadar COD dengan efisiensi proses lebih besar 80 % dan kadar turbiditas  dengan efisiensi lebih besar 90%. Untuk penggunaan elektroda Fe dengan rapat arus 1,0 A/dm2 dengan waktu 30 menit menghasilkan penyisihan COD 75,3 mgO2/L dengan efisiensi 94% dan penurunan kekeruhan (turbiditas) 1,21 NTU dengan efisiensi penurunan 96%, sedangkan dengan elektroda Al kondisi terbaik dicapai pada rapat arus 0,75 A/dm2 dengan waktu proses 35 menit menghasilkan penyisihan COD 24,13 mg O2/L dengan efisiensi  97% dan penurunan turbiditas 0,35 NTU dengan efisiensi penurunan 99,8%.
Effect of Fruit Ripening Level and Roasting Temperature on Robusta Coffee Bean Quality Emma Hermawati Muhari; Rony Pasonang Sihombing; Yunus Tonapa Sarungu; Ari Marlina; Unung Leoanggraini; Tri Hariyadi
Jurnal Internasional Penelitian Teknologi Terapan Vol 4 No 1 (2023): April 2023
Publisher : Bandung State Polytechnic (Politeknik Negeri Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/ijatr.v4i1.88

Abstract

The purpose of this study is to determine the effect of roasting temperature on the chemical content of Robusta coffee at various levels of Robusta coffee maturity. The research will be conducted at roasting temperatures of 190℃, 200℃, 210℃, 220℃ and chemical content analysis is carried out bygravimetric method and UV-VIS spectrophotometry on fresh beans, green beans and coffee beans at each temperature variation and the maturity level of Robusta coffee. Maturity of coffee beans will be classified visually and use an RGB meter to help and facilitate the selection of coffee beans in accordance with the level of maturity. The variables taken and observed in the study are the temperature of the roasting process, the time required at the time of roasting, as well as the mass, chemical content and physical parameters of robusta coffee beans observed before and after the roasting process. Chemical content was observed in the form of water content, fat content, caffeine, and antioxidants, then the physical parameters observed were aroma, color, shape, taste, and characteristics of coffee beans at each level of robusta coffee fruit maturity. The results obtained value of the chemical content and organoleptic test at each level of maturity of the coffee fruit and roasting temperature variations because basically the roasting temperature will produce coffee beans that have their own characteristics and flavors. This study also determines the value of the mass transfer coefficient and heat transfer in the drying process by the roasting method.
Laju Korosi Logam Baja Karbon Rendah di Larutan Garam pada Berbagai Konsentrasi Inhibitor Korosi dari Ekstrak Daun Pepaya: Low Carbon Steel Metal Corrosion Rate in Salt Solution at Various Concentrations of Corrosion Inhibitor from Papaya Leaf Extract Ninik Lintang Edi Wahyuni; Rony Pasonang Sihombing; Nurcahyo; Agustinus Ngatin; Yunus Tonapa Sarungu; Alfiana Adhitasari; Bambang Soeswanto; Emma Hermawati Muhari; retno indarti
KOVALEN: Jurnal Riset Kimia Vol. 9 No. 2 (2023): August Edition
Publisher : Chemistry Department, Mathematics and Natural Science Faculty, Tadulako University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/kovalen.2023.v9.i2.16344

Abstract

Papaya leaf extract could be used as an organic corrosion inhibitor. Corrosion inhibitors were used as a method to reduce corrosion rate. The most corrosive environment was the marine environment. The purpose of this study was to determine the best concentration of papaya (Carica papaya) leaf extract inhibitor which could reduce the corrosion rate of low carbon steel in a 3.56% NaCl solution environment. The maceration process was carried out for 24 hours with 70% ethanol solvent with a solute:solvent ratio of 1:8 (w/v) at room temperature. Inhibitor extracts were analyzed qualitatively with the phytochemical method. The addition of FeCl3 was carried out on the inhibitor extract from papaya leaves. The color change occurred from blackish brown to greenish black which indicated the presence of tannin compounds in the papaya leaf extract. Corrosion testing was carried out with hot stream temperature setting at 45⁰C to 55⁰C and concentrations of inhibitor extracts at 300, 600, and 900 ppm. The test was conducted for 36 hours with a span of metal mass every 6 hours. Corrosion rate calculation is done by weight loss method. The results showed that papaya leaf extract inhibitors positive contained corrosion inhibitor and could reduce the corrosion rate in 3.56% NaCl solution. The corrosion rate without inhibitor is 1.023 mmpy. Corrosion rates with inhibitor concentrations of 300, 600, and 900 ppm were 0.755, 0.585, and 0.438 mmpy, respectively.
Co-Authors Alfiana Adhitasari Alfiana Adhitasari Annisa Nurlatifah Ari Marlina Bambang Soeswanto Bambang Soeswanto Cut Magesang Emma Hermawati Emma Hermawati Muhari Emma Hermawati Muhari Jayanti, Retno Dwi Ngatin, Agustinus Nidaa’ Rihhadatul ‘Aisya Komara Ninik Lintang Edi Wahyuni Nurcahyo Putri Utami Dita Cahya Restu Adji Alif Asyari Retno Indarti Rispiandi Rispiandi Robby Sudarman Sihombing, Rony Pasonang Sudrajat Harris Abdulloh Suryadi, Joko Tri Hariyadi Tri Reksa Saputra Unung Leoanggraini