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Brine Evaporation Modeling in WAIV System Using Penman, Priestley-Taylor, and Harbeck Models Herry Santoso; Dwiki Eka Putra; Giovanni Angelina; Yansen Hartanto; Judy Retti Bhawaningrum Witono; Kevin Cleary Wanta
Journal of Engineering and Technological Sciences Vol. 54 No. 6 (2022)
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2022.54.6.9

Indonesia is a maritime country with a vast ocean area. Indonesia has high potential to produce salt because it has a lot of saltwater resources. When sea salt is harvested, seawater evaporates from a concentration of 3.5°Be to 29°Be. Evaporation can be affected by several factors, such as air temperature, wind speed, water vapor pressure, humidity, radiation, geographical location, time interval, and season. Many modifications have been made to increase the evaporation rate in salt production. One of them is the WAIV (Wind-Aided Intensified eVaporation) method. WAIV evaporation systems utilize sunlight and wind to accelerate the evaporation rate. The modeling in this study was adjusted to the environmental conditions in the case study for which it was necessary to determine new parameter values for the existing models. The Penman, Priestley-Taylor, and Harbeck models were used. The Harbeck model has been studied in previous studies, which were used as a reference in the present study. This study first determined and then validated the parameter values obtained. A simulation of the evaporation rate was conducted in a different place, namely Kupang, East Nusa Tenggara, Indonesia using Meteorology, Climatology, and Geophysical Agency (Indonesian: Badan Meteorologi, Klimatologi, dan Geofisika / BMKG) data.

PENINGKATAN KESEJAHTERAAN PETANI GARAM DESA OLIO, PROVINSI NTT MELALUI PELATIHAN PEMBUATAN GARAM KONSUMSI BERYODIUM Kevin Cleary Wanta; Herry Santoso; Arry Miryanti; Judy Retti B. Witono
RESWARA: Jurnal Pengabdian Kepada Masyarakat Vol 4, No 1 (2023)
Publisher : Universitas Dharmawangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46576/rjpkm.v4i1.2381

Petani garam di Desa Olio, Kabupaten Kupang, Provinsi Nusa Tenggara Timur menggunakan metode konvensional untuk memproduksi garam. Garam tersebut memiliki harga jual yang tidak stabil. Bahkan, dalam kondisi ekstrem, harga jual dari garam tersebut sangat rendah. Akibatnya, kesejahteraan para petani garam masih berada pada tingkat yang rendah. Kegiatan pengabdian ini bertujuan untuk meningkatkan kesejahteraan petani garam dengan cara menaikkan nilai ekonomis dari produk tersebut. Salah satu usaha untuk mewujudkan tujuan tersebut adalah dengan memproduksi garam konsumsi beryodium. Garam ini memiliki nilai ekonomi yang lebih tinggi dan lebih stabil. Bentuk kegiatan pengabdian ini berupa kegiatan pelatihan dan pendampingan. Tim pengabdi memberikan bekal materi tentang produksi garam konsumsi beryodium. Kemudian, tim pengabdi juga menghibahkan satu unit alat produksi, yang berupa ribbon mixer. Kegiatan pengabdian ini berhasil dilakukan sesuai dengan rencana. Pelaksanaan kegiatan ini mampu memberikan dampak positif. Hal ini terlihat dari adanya perubahan motivasi, inisiatif, dan perilaku para petani garam di mana para petani sudah memulai untuk membuat usaha produksi garam konsumsi beryodium. Dengan melihat adanya perubahan yang positif, tim pengabdi melakukan pendampingan kepada para petani garam tersebut. Kegiatan pendampingan ini terus dilakukan karena ke depannya, realisasi usaha ini masih membutuhkan persiapan yang banyak dan tantangan yang akan dihadapi oleh petani garam masih besar

Utilization of the spent catalyst as a raw material for rechargeable battery production: The effect of leaching time, type, and concentration of organic acids Tabita Kristina Mora Ayu Panggabean; Ratna Frida Susanti; Widi Astuti; Himawan Tri Bayu Murti Petrus; Anastasia Prima Kristijarti; Kevin Cleary Wanta
International Journal of Renewable Energy Development Vol 12, No 3 (2023): May 2023
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2023.51353

This study examines the potential use of the spent catalyst as a raw material for rechargeable batteries. The spent catalyst Ni/γ-Al2O3 still contains relatively high amounts of nickel. This indicates the potential use of the spent catalyst to be leached and purified for synthesizing nickel-based compounds so that it can be applied to rechargeable battery cathodes. In this study, the spent catalyst leaching process employed four types of organic acids: citric acid, lactic acid, oxalic acid, and acetic acid. The spent catalyst was leached under atmospheric conditions and room temperature. Organic acid concentrations were also varied at 0.1, 0.5, 1, and 2 M. The leaching process took place for 240 minutes, where sampling was conducted periodically at 30, 60, 120, 180, and 240 minutes. Experimental results showed that Ni (II) and Al (III) ions were successfully leached to the maximum when using 2M citric acids at a leaching time of 240 minutes. The conditions succeeded in leaching Ni (II) and Al (III) ions of 357.8 and 1,975.4 ppm, respectively. Organic acid, notably citric acid, has excellent potential for further development. Citric acid, as a solvent, has the ability to leach metal ions with high recovery. In addition, this acid is categorized as an eco-friendly and green solvent compared to inorganic acid. Thus, the leaching process can take place without harming the environment.

SYNTHESIS AND CHARACTERIZATION OF NICKEL HYDROXIDE FROM EXTRACTION SOLUTION OF SPENT CATALYST Kevin Cleary Wanta; Felisha Hapsari Tanujaya; Federick Dwi Putra; Ratna Frida Susanti; Gelar Panji Gemilar; Widi Astuti; Himawan Tri Bayu Murti Petrus
Metalurgi Vol 35, No 3 (2020): Metalurgi Vol. 35 No. 3 Desember2020
Publisher : National Research and Innovation Agency (BRIN)

Nickel is an essential metal element and is applied in various sectors. One of the useful nickel–based derivatives products is nickel hydroxide [Ni(OH)2]. This compound is widely applied as raw material for electrodes of rechargeable batteries, capacitors, electrolyzers, and catalysts. This study focuses on the synthesis of Ni(OH)2 using the hydroxide precipitation method. A solution from the extraction process of spent catalysts was used as a precursor solution. After the precursor solution was obtained, the precipitation process was carried out at pH 10, where the operating temperature was varied at 30–60oC. NaOH, KOH, and MgO solutions were used as precipitating agents. The experimental results show that the Ni(OH)2 compounds were produced optimally at low temperatures, 30oC. It could be indicated from the lowest concentration of Ni2+ ions in the liquid phase that reached that temperature. The three precipitation agents also gave good results in the precipitation of Ni2+ ions, where almost all of the Ni2+ ions were precipitated from the liquid phase. The precipitated products were characterized using SEM, XRD, and XRF. The analysis results showed that the product was agglomerated and formless. The purity of the precipitates formed were 24.1 and 29% for the precipitating agents MgO and NaOH, respectively.

INCREASING OF METAL RECOVERY IN LEACHING PROCESS OF SPENT CATALYST AT LOW TEMPERATURE: THE ADDITION OF HYDROGEN PEROXIDE AND SODIUM CHLORIDE Kevin Cleary Wanta; Edward Yonathan Natapraja; Ratna Frida Susanti; Gelar Panji Gemilar; Widi Astuti; Himawan Tri Bayu Murti Petrus
Metalurgi Vol 36, No 2 (2021): Metalurgi Vol. 36 No. 2 Agustus 2021
Publisher : National Research and Innovation Agency (BRIN)

One of the factors that affect the leaching process of a mineral source is the mineral characteristics of the raw materials. Not all mineral phases can be leached directly and completely. Thus, some minerals require special treatment so that the leaching process can take place optimally. This study will focus on studying the effect of additive compounds addition, i.e. hydrogen peroxide and sodium chloride, in the leaching process of spent catalyst using a sulfuric acid solution. The leaching process was carried out at a concentration of 1 M sulfuric acid solution for 240 minutes at room temperature. The hydrogen peroxide concentration was varied at 0–9%v/v, while the sodium chloride concentration was varied at 0–0.8 mol/L. The experimental results showed that the two additive compounds were able to increase nickel recovery significantly. The highest nickel recovery of 95.08% was achieved when hydrogen peroxide was used at 9%v/v. The nickel recovery is 3.5 times higher than without the addition of hydrogen peroxide. Meanwhile, sodium chloride concentration of 0.8 mol/L was able to provide the highest nickel recovery of 50.38% or an increase of 1.9 times compared to without the addition of sodium chloride.

Penerapan Teknologi 3D Rope Evaporator dalam Usaha Peningkatan Produksi Garam Rakyat di Desa Olio, Nusa Tenggara Timur Kevin Cleary Wanta; Vincent; Yeremias Juma; Arry Miryanti; Herry Santoso; Judy Retti B. Witono
Journal of Appropriate Technology for Community Services Vol. 4 No. 2 (2023)
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/jattec.vol4.iss2.art7

Desa Olio, Kabupaten Kupang, Provinsi Nusa Tenggara Timur merupakan salah satu wilayah di Indonesia yang memproduksi garam. Selama ini, produksi garam dilakukan secara konvensional di mana tambak garam secara horizontal digunakan sebagai media penguapan air laut. Akan tetapi, penggunaan tambak garam ini memiliki kelemahan, seperti produksi garam yang terbatas akibat pengaruh iklim dan membutuhkan waktu produksi yang lebih lama. Kegiatan pengabdian ini ditujukan untuk mengenalkan dan menerapkan teknologi 3D rope evaporator sebagai media penguapan air laut yang mampu memberikan hasil positif terhadap produksi garam. Penggunaan teknologi ini mampu meningkatkan laju penguapan sehingga jumlah garam yang diproduksi semakin banyak. Teknologi ini dibangun secara prototipe di lahan milik petani garam, kemudian diuji coba dan dievaluasi perfomansinya. Hasil uji coba tersebut kemudian disosialisasikan di mana 3D rope evaporator yang dibangun mampu mempercepat proses penguapan air laut dan mampu menghasilkan produk garam yang lebih halus dan lebih putih. Kegiatan pengabdian kepada masyarakat ini jelas tidak hanya berhenti saat ini saja. Ke depannya, kegiatan ini akan dilanjutkan dengan fokus kegiatan yang berbeda di antaranya pendampingan dan konsultasi terkait tahap scale up teknologi, pemurnian garam, dan diversifikasi produk garam.

Utilization of the spent catalyst as a raw material for rechargeable battery production: The effect of leaching time, type, and concentration of organic acids Tabita Kristina Mora Ayu Panggabean; Ratna Frida Susanti; Widi Astuti; Himawan Tri Bayu Murti Petrus; Anastasia Prima Kristijarti; Kevin Cleary Wanta
International Journal of Renewable Energy Development Vol 12, No 3 (2023): May 2023
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2023.51353

This study examines the potential use of the spent catalyst as a raw material for rechargeable batteries. The spent catalyst Ni/γ-Al2O3 still contains relatively high amounts of nickel. This indicates the potential use of the spent catalyst to be leached and purified for synthesizing nickel-based compounds so that it can be applied to rechargeable battery cathodes. In this study, the spent catalyst leaching process employed four types of organic acids: citric acid, lactic acid, oxalic acid, and acetic acid. The spent catalyst was leached under atmospheric conditions and room temperature. Organic acid concentrations were also varied at 0.1, 0.5, 1, and 2 M. The leaching process took place for 240 minutes, where sampling was conducted periodically at 30, 60, 120, 180, and 240 minutes. Experimental results showed that Ni (II) and Al (III) ions were successfully leached to the maximum when using 2M citric acids at a leaching time of 240 minutes. The conditions succeeded in leaching Ni (II) and Al (III) ions of 357.8 and 1,975.4 ppm, respectively. Organic acid, notably citric acid, has excellent potential for further development. Citric acid, as a solvent, has the ability to leach metal ions with high recovery. In addition, this acid is categorized as an eco-friendly and green solvent compared to inorganic acid. Thus, the leaching process can take place without harming the environment.

Pelatihan dan Pendampingan Komunitas Kesusteran ALMA, Bandung, untuk Memanfaatkan Limbah Minyak Rumah Tangga sebagai Bahan Baku Pembuatan Lilin Kevin Cleary Wanta1; Cherish Rikardo; Loren Pratiwi; Anastasia Prima Kristijarti; Ceicalia Tesavrita
Journal of Appropriate Technology for Community Services Vol. 5 No. 1 (2024)
Publisher : Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/jattec.vol5.iss1.art3

Used cooking oil or commonly called used minyak jelantah is classified as waste that can pollute the environment. For this reason, this waste cannot be disposed directly into the environment. One way to process this waste is to recycle it, or to make other products that are more useful and valuable, such as candles from used cooking oil. This community service activity consist of, socialization, training and assistance for making candles from used cooking oil for the ALMA Sisters community: Bhakti Luhur Orphanage, Bandung. This activity was successful according to plan and the most important thing is that through this activity, there was success which had a positive impact on service partners. This activity is considered useful and provides new knowledge for partners. Moreover, with the help of tools and materials for producing candles from used cooking oil provided, the partners were able to produce a thousand candles which were ready to be marketed. This service activity will not stop with training and mentoring activities only. In the future, the service team will continue to train and assist partners, especially in terms of marketing, packaging and production of other products using used cooking oil as raw material.

Analisis kelayakan finansial dan non finansial untuk pendirian pabrik pakan ikan berbasis maggot Wanta, Kevin Cleary Wanta Cleary; Julianto, Shelvia; Fynn, Vincentius Felix; Miryanti, Arry; Kumalaputri, Angela Justina; Santoso, Herry; Tjuaja, Rudy; Witono, Judy Retti
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.80087

Sektor perikanan di Indonesia tergolong sebagai sektor yang sangat besar, baik dalam hal produksi maupun konsumsinya. Kondisi ini menyebabkan kegiatan budidaya ikan juga akan meningkat seiring dengan kebutuhannya. Salah satu masalah yang dihadapi dalam kegiatan tersebut adalah masalah pakan ikan yang mahal. Untuk itu, pendirian pabrik pakan ikan yang murah dengan produk yang memenuhi standar nutrisi merupakan peluang besar. Studi ini mempelajari tentang evaluasi ekonomi terhadap kelayakan finansial dan non finansial dari pabrik pakan ikan berbasis maggot. Analisis kelayakan finansial yang telah dilakukan menunjukkan bahwa nilai ROI, PBP, NPV, IRR, dan BEP sebesar 20,84%, 5,48 tahun, Rp 307.103.117, 15,36%, dan 32,11%, secara berurutan. Berdasarkan hasil perhitungan tersebut, seluruh parameter kelayakan finansial menunjukkan bahwa pabrik pakan ikan berbasis maggot ini layak untuk didirikan. Tidak hanya itu, pendirian pabrik tersebut juga memberikan pengaruh positif secara non finansial. Aspek lingkungan, teknikal, sosial-ekonomi, dan pasar mendukung kelayakan pendirian pabrik ini. Lebih jauh, pabrik pakan ikan ini juga mendukung usaha untuk mengatasi permasalahan sampah organik. Kegiatan budidaya maggot dengan menggunakan sampah organik ini akan tumbuh karena maggot yang dihasilkan dapat digunakan sebagai bahan baku utama untuk produksi pakan ikan.

Analisis kelayakan finansial dan non finansial untuk pendirian pabrik pakan ikan berbasis maggot Wanta, Kevin Cleary Wanta Cleary; Julianto, Shelvia; Fynn, Vincentius Felix; Miryanti, Arry; Kumalaputri, Angela Justina; Santoso, Herry; Tjuaja, Rudy; Witono, Judy Retti
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.80087

Sektor perikanan di Indonesia tergolong sebagai sektor yang sangat besar, baik dalam hal produksi maupun konsumsinya. Kondisi ini menyebabkan kegiatan budidaya ikan juga akan meningkat seiring dengan kebutuhannya. Salah satu masalah yang dihadapi dalam kegiatan tersebut adalah masalah pakan ikan yang mahal. Untuk itu, pendirian pabrik pakan ikan yang murah dengan produk yang memenuhi standar nutrisi merupakan peluang besar. Studi ini mempelajari tentang evaluasi ekonomi terhadap kelayakan finansial dan non finansial dari pabrik pakan ikan berbasis maggot. Analisis kelayakan finansial yang telah dilakukan menunjukkan bahwa nilai ROI, PBP, NPV, IRR, dan BEP sebesar 20,84%, 5,48 tahun, Rp 307.103.117, 15,36%, dan 32,11%, secara berurutan. Berdasarkan hasil perhitungan tersebut, seluruh parameter kelayakan finansial menunjukkan bahwa pabrik pakan ikan berbasis maggot ini layak untuk didirikan. Tidak hanya itu, pendirian pabrik tersebut juga memberikan pengaruh positif secara non finansial. Aspek lingkungan, teknikal, sosial-ekonomi, dan pasar mendukung kelayakan pendirian pabrik ini. Lebih jauh, pabrik pakan ikan ini juga mendukung usaha untuk mengatasi permasalahan sampah organik. Kegiatan budidaya maggot dengan menggunakan sampah organik ini akan tumbuh karena maggot yang dihasilkan dapat digunakan sebagai bahan baku utama untuk produksi pakan ikan.

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