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All Journal Jurnal Akuakultur Sungai dan Danau Jurnal Rekayasa, Teknologi, dan Sains Jurnal Pengabdian Multidisiplin Mars: Jurnal Teknik Mesin, Industri, Elektro dan Ilmu Komputer
Wahyu Saputro
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Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Public Health Social Sciences Other

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PENGARUH JENIS AKTIVASI BIOADSORBEN KULIT SINGKONG TERHADAP PENURUNAN KADAR BESI (Fe) DALAM AIR SUMUR GALI Sulastri Sulastri; Hardoyo Hardoyo; Wahyu Saputro
Jurnal Rekayasa Teknologi dan sains Vol 2, No 2 (2018)
Publisher : Fakultas Teknik Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jrets.v2i2.1123

Abstract

Air merupakan kebutuhan yang sangat vital bagi makhluk hidup. Air bersih harus memenuhi syarat kualitas fisik, kimia dan biologi. Masyarakat di Kampung Magelangan Kelurahan Ganjar Asri Kecamatan Metro Barat Kota Metro menggunakan air sumur gali dengan kandungan besi (Fe) yang tinggi (3,85 mg/l) untuk keperluan sehari-hari, Air sumur gali perlu dilakukan pengolahan untuk menurunkan kadar Fe tersebut sebelum digunakan untuk keperluan sehari-hari. Penggunaan bioadsorben menjadi salah satu alternatif untuk dikembangkan, karena murah dan mudah didapat. Salah satu bioadsorben yang dapat dikembangkan adalah kulit singkong, karena kulit singkong mengandung 59,31 % karbon.Tujuan penelitian ini adalah untuk mengetahui pengaruh jenis aktivasi adsorben kulit singkong terhadap proses penurunan kadar besi (Fe) dalam air sumur gali. Penelitian dilakukan di Universitas Malahayati dari 10 April 2015 sampai 10 Mei 2015. Penelitian dilakukan pada skala laboratorium, dengan proses kontinyu dan aliran keatas. Debit aliran diatur sebesar 15 ml/menit. Sampel diambil pada menit ke-2, 22, 42, 62, 82, 102, dan 122. Konsentrasi Fe awal air sumur gali 3,85 mg/l. Variabel bebas dalam penelitian ini adalah jenis aktivasi media adsorben kulit singkong, sedangkan variabel terikat adalah kadar besi (Fe). Larutan FeCl3 dengan konsentrasi 3,85 mg/l digunakan sebagai pembanding.Hasil penelitian menunjukkan bahwa efisiensi penurunan Fe pada air sumur gali sebesar 28,31%, 81,12%, 93,03%, dan 94,46% masing-masing untuk adsorben kulit singkong tanpa aktivasi, aktivasi fisika, aktivasi kimia, dan aktivasi fisika kimia. Efisiensi penurunan Fe pada larutan FeCl3 sebesar 31,19%, 85,61%, 96,77 %, dan 97,37% masing-masing untuk adsorben kulit singkong tanpa aktivasi, aktivasi fisika, aktivasi kimia, dan aktivasi fisika kimia. Dari hasil tersebut menunjukkan bahwa kandungan logam-logam selain Fe yang ada dalam air sumur gali menghambat proses adsorpsi Fe.Kata Kunci: Air Sumur Gali, FeCl3, Karbon Aktif Kulit Singkong, Kadar Besi (Fe), AktivasiABSTRACT: The Effect Of The Type Of Cassava Skin Bioadsorbent Activation On The Decrease In Iron (Fe) Levels In Dug Well Water.Water is an important thing for human beings. The clean water have to fullfill the physical,chemical and biological regulation quality. The people at Magelangan Ganjar Asri, Metro City use the dugwell water that contain high (3,85 mg/l) to a daily water activity. The dug-well water have to be treat to decrease Fe concentration before used to daily water activity. The use of bioadsorben as alternative adsorben can be developed, because it is cheap and easy to obtain. One of bioadsorben that can be developed is bioadsorben from cassava-peel, The cassava-peel contain about 59.31% of carbon. The purpose of this research is to know the effect of the activation process type of cassava-peel bioadsorben to decrease Fe concentration in the dug-well water. The research was done at Malahayati University from April 10th 2015 until May 10th. The research was done on the laboratory scale using upflow continuous process. The flow debit was adjusted 15ml/min. Sample were taken at the min 0f -2, 22, 42, 62, 82, 102, and 122. The initial of the dugwell water concentration is 3,85 mg/l. The dependent variable in this research the activation process type of cassava-peel bioadsorben, and the independent variable are Fe concentration. The FeCl3 solution with the 3,85 mg/l Fe concentration was used as comparing solution.The research result shoion that the decreasing Fe concentration efficiency of the dug-well water were 28,31%, 81,12%, 93,03%, and 94,46% for not activation process, physical activation process, chemical activation process, and physical-chemical activation process respectivelly. The decreasing of Fe concentration concentration efficiency of the FeCl3 solution were 31,19%, 85,61%, 96,77%, and 97,37% for not activation process, physical activation process, chemical activation process, and physical-chemical activation process. The result shoion that Fe adsorbtion process in the dugwell water were in hibited another metal ions.Keywords: Dug-well Water, FeCl3 Solution, Cassava peel adsorben, Fe Concentration, Activation
Efektivitas Pemberian Tepung Cacing Sutra (Tubifex Sp) dalam Pakan Terhadap Performa dan Kelangsungan Hidup Benih Ikan Komet (Carassius auratus) Wahyu Saputro; Syahrizal Syahrizal; Muarofah Ghofur
Jurnal Akuakultur Sungai dan Danau Vol 7, No 2 (2022): Oktober
Publisher : Universitas Batangahari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/akuakultur.v7i2.136

Abstract

Comet goldfish (Carassius auratus) is a type of freshwater ornamental fish that is popular among the public and has the main advantage of having lots of color variations. The use of fish meal is the biggest obstacle causing the high price of feed and affecting the production of comet fish. The new alternative material to replace fish meal is silk worm flour (Tubifex sp). The aim of this study was to determine the effectiveness of feeding silkworm meal on the performance and survival of comet fish (C. auratus) fry. This research was carried out in February-March 2021 at Perum Yeyes Lestari, Kenali Besar Village, Alam Barajo District, Jambi City for 40 days. The experimental design used in this study was a completely randomized design with 4 treatments and 3 replications, the treatments included 15% silk worm flour (A), 20% silk worm flour (B), 25% silk worm flour (C) 30% silk worm flour (D). The test fish used were comet fish measuring 3-5 cm as many as 120 fish. The results showed that temperature had an effect on survival, absolute weight growth and feed conversion. The color of comet fish for all treatments at the beginning of the study ranged from 3.90-4.43 (golden yellow), while at the end of the study there was a color change that ranged from -2.14-2.83 (dark red). The highest SR was found in treatment A of 86.67% followed by treatment B 70.00% and treatment D 56.67%. The highest PBM value was found in treatment C of 3.26 g. The best FCR value was found in treatment C of 3.56. The results of the analysis of water quality showed that the condition of the culture media was still quite feasible for the maintenance of comet fish in the aquarium container.
Peningkatan Literasi Keuangan dan Jiwa Kewirausahaan Perempuan Pekerja Migran Indonesia di Hong Kong Pardamean Daulay; Yuli Tirtariandi El Anshori; Erlambang Budi Darmanto; Wahyu Saputro
Jurnal Pengabdian Multidisiplin Vol. 3 No. 3 (2023): Jurnal Pengabdian Multidisiplin
Publisher : Kuras Institute & Scidac Plus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51214/00202303710000

Abstract

Program peningkatan literasi keuangan dan jiwa kewirausahaan bagi perempuan Pekerja Migran Indonesia (PMI) di Hong Kong diikuti oleh tiga puluh orang peserta. Permasalahan dalam literasi keuangan yang dialami para perempuan PMI tersebut antara lain kesulitan mengelola keuangan dan membuat anggaran untuk merencanakan usaha dan bisnisnya. Selam ini uang yang mereka kirim ke sanak saudara di Indonesia untuk mengembangkan usaha dan bisnis justru habis karena para PMI tersebut kurang paham tentang pengelolaan keuangan. Tujuan program Pengabdian Kepada Masyarakayt (Abdimas) ini adalah untuk memberikan tambahan wewasan pengelolaan keuangan secara maksimal, meningkatkan motivasi perilaku menabung (saving), berinvestasi, dan menumbuhkan jiwa wirausaha sebagai bekal ketika kembali ke Indonesia. Metode kegiatan dilakukan melalui empat tahapan, yaitu observasi, persiapan, pelatihan, dan evaluasi. Kegiatan abdimas berhasil dilaksanakan berkat kerjasama antara Pengurus Pokjar UT Hong Kong, pengurus organisasi pekerja migran, dan mahasiswa UT yang berada di Hong Kong. Untuk mengetahui pencapaian tujuan kegiatan ini dilakukan dengan meminta seluruh peserta mengisi kuesioner atau angket menggunakan aplikasi Googel Form. Hasil kegiatan pelatihan ini sangat bermanfaat bagi perempuan PMI di Hong Kong, adanya pengetahuan baru tentang pengelolaan keungan, dapat membuat penganggaran bagi perencanaan usaha atau bisnis mereka kelak setelah kembali ke Indonesia, dan tingkat kehadiran peserta kegiatan mencapai 100%
Penerapan Algoritma C4.5 dengan Teknik Resample untuk Prediksi Kinerja Pegawai PT X Wahyu Saputro
Mars : Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer Vol. 3 No. 4 (2025): Agustus : Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer
Publisher : Asosiasi Riset Teknik Elektro dan Informatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/mars.v3i4.1049

Abstract

Human Resource Management (HRM) plays a strategic role in improving organizational competitiveness through proper management of employee placement, training, and performance evaluation. To support the achievement of these goals, a predictive model is needed that can provide an accurate picture of employee performance. This study utilizes a Human Resource Management (HRM) dataset of 1,200 data and applies several classification algorithms to compare their effectiveness, namely J48 or C4.5, Random Forest, Naive Bayes, K-Nearest Neighbor (KNN), Logistic Regression, and Support Vector Machine (SVM). To obtain more optimal results, this study uses resampling techniques and attribute selection methods with a correlation attribute eval approach, so that class distribution can be more balanced and model accuracy increases. From the test results, the Decision Tree J48 algorithm showed the best performance with an accuracy level reaching 95.41%, a kappa value of 0.8925, a mean absolute error (MAE) of 0.0432, a precision of 0.955, a recall of 0.954, and an area under the ROC curve of 0.964. These findings indicate that J48 has excellent predictive capabilities compared to other algorithms. Furthermore, this study also found that the most influential variables in determining employee performance include the percentage of the last salary increase (EmpLast Salary Hike Percent), the level of work environment satisfaction (Emp Environment Satisfaction), the length of time since the last promotion (Years Since Last Promotion), and experience in the current role (Experience Years in Current Role). Overall, the results of the study indicate that the C4.5 algorithm with the application of the resampling technique can be an optimal solution in building an employee performance prediction system. Thus, this model has the potential to be a strong basis for managerial decision-making, particularly in designing HR development strategies and policies to improve organizational performance.
Co-Authors Erlambang Budi Darmanto Hardoyo Hardoyo Muarofah Ghofur Pardamean Daulay Sulastri Sulastri Syahrizal Syahrizal Yuli Tirtariandi El Anshori