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All Journal Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan MIND (Multimedia Artificial Intelligent Networking Database) Journal Journal of Community Development Jurnal Teknik Terapan (J-TETA) Jurnal Polimesin
Prasetyo, Dafit Ari
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Nursing Public Health Social Sciences

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Pelatihan Penggunaan Mesin Pengering Kopi Untuk Meningkatkan Keterampilan Petani Kopi Faizin, Nur; Ulma, Zeni; Prasetyo, Dafit Ari; Hananto, Yuli; Karimah, Cahyaning Nur
Journal of Community Development Vol. 4 No. 2 (2023): December
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/comdev.v4i2.159

Abstract

Improving human resource skills is one of the pillars in determining the increase in quality and quantity of production in a business. In the coffee plantation business sector, the skills of coffee farmers play an important role in the production process. The operation of the machines used is an absolute requirement for achieving effectiveness and efficiency in the process. One of them is a coffee drying machine obtained by the Sumber Kembang farmer group from previous community service activities. This must be accompanied by operating skills so that in this service activity training will be carried out on the use of coffee drying machines. The methods used were surveys, training and discussions. The result of this service activity is the achievement of increasing the skills of coffee farmers in terms of operating coffee drying machines. Achievement of service activities is carried out by providing feedback to partners in the form of questionnaires. The results of the questionnaire showed that respondents from partner members mostly gave positive responses to service activities in the form of coffee drying machine training.
Sistem Evaluasi Lahan Penentuan Tanaman menggunakan Metode Forward Chaining SAFITRI, NADIA AYU; ATTHOILLAH, EDY; NAJAMUDDIN, AHMAD NANDA; FAUZI, HILMIY AHMAD; HIKMAH, LAILATUL; PRASETYO, DAFIT ARI; FITRI, ZILVANHISNA EMKA
MIND (Multimedia Artificial Intelligent Networking Database) Journal Vol 9, No 2 (2024): MIND Journal
Publisher : Institut Teknologi Nasional Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/mindjournal.v9i2.153-165

Abstract

ABSTRAKSistem Evaluasi Lahan merupakan sistem untuk menilai kesesuaian suatu lahan bagi berbagai jenis tanaman. Kurangnya pengetahuan petani tentang tingkat kesuburan tanah untuk jenis tanaman tertentu menyebabkan kegagalan dalam usaha pertanian mereka. Kandungan unsur NPK (Nitrogen, Phospor, dan Kalium) dalam tanah menentukan tingkat kesuburan lahan. Penelitian ini bertujuan mengembangkan sistem evaluasi lahan menggunakan teknologi pengolahan citra tanah dan metode forward chaining untuk menentukan kesesuaian lahan dan memberikan rekomendasi tanaman. Hasil penelitian menghasilkan tingkat akurasi dalam prediksi nilai kandungan Nitrogen sebesar 96,6%, Phospor sebesar 91,03%, dan Kalium sebesar 94,69% serta memberikan rekomendasi tanaman yang tepat. Sistem evaluasi lahan ini diharapkan dapat membantu petani meningkatkan produktivitas pertanian mereka.Kata kunci: pertanian, unsur hara NPK, pengolahan citra, sistem pakar, forward chaining ABSTRACTA land evaluation system is a system for assessing the suitability of land for different types of crops. The lack of farmers' knowledge about the soil fertility level for certain crops led to failure in their agricultural endeavors. The soil's content of NPK elements (Nitrogen, Phosphorus, and Potassium) determines soil fertility. The research aims to develop an evaluation system of soil using soil image processing technology and forward chaining methods to determine soil suitability and give plant recommendations. The results of the research yield accuracy in the prediction of nitrogen content values of 96.6%, phosphorus of 91.03%, and potassium of 94.69% and give the correct plant recommendation. This land evaluation system is expected to help farmers increase their agricultural productivity.Keywords: agriculture, NPK hara element, image processing, expert system, forward chaining
Optimization of the Use of Bottom Ash PLTSa Bantargebang As an Adsorbent in the Process of Reducing FFA in Used Cooking Oil Biodiesel Raw Material with Taguchi Method: Optimasi Penggunaan Bottom Ash PLTSa Bantargebang Sebagai Adsorben pada Proses Penurunan FFA pada Minyak Jelantah Bahan Baku Biodiesel Dengan Metode Taguchi Wicaksono, Damar Canggih; Susmiati, Yuana; Prasetyo, Dafit Ari
Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Vol. 8 No. 2 (2024)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rbaet.2024.008.02.05

Abstract

The reduction of FFA levels in used cooking oil as a biodiesel raw material is generally done by the esterification process. Another method that can be used to reduce FFA levels is through the adsorption method. The adsorbent used is bottom ash waste. This study aims to determine the effect of bottom ash adsorbent variation and determine the best variation based on Taguchi analysis. This research uses Taguchi data processing technique with 2 factors and 3 levels. The first factor is adsorbent mass with variations (5% m/v, 10% m/v, and 15% m/v). The second factor is the length of adsorption time with variations (30 minutes, 60 minutes, and 90 minutes). The testing parameters included FFA content, acid number, density, and viscosity. The results of this study were analyzed using the Taguchi method which shows the variation of adsorbent mass and time for FFA content is the variation of 5% m/v adsorbent mass and 30 minutes adsorption time which can reduce FFA by 35.2%, with an acid number value of 3.029 mg KOH/g, density of 0.903 g/cm3 and viscosity of 4.463 sCt in samples that successfully reduced the FFA value by 35.2%.
Pengaruh Komposisi Campuran dan Ukuran Butiran terhadap Kualitas Briket Arang dari Limbah Serbuk Kayu Mahoni (Swietenia macrophylla) dengan Perekat Daun Jarak Pagar (Jatropha curcas) Prasetyo, Dafit Ari; Violita, Elvira Anne; Sholikah, Umi; Astuti, Ulvi Pri
Jurnal Teknik Terapan Vol. 4 No. 2 (2025): Oktober
Publisher : P3M Politeknik Negeri Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Mahogany sawdust waste (Swietenia macrophylla) has not been widely utilized and is only used as baglog in oyster mushroom cultivation and particle board mixture. The potential of mahogany sawdust waste as fuel is quite high, especially when viewed from its calorific value which reaches 4,652.34-4,844.83 cal/g. Making mahogany sawdust into charcoal briquettes with a mixture of castor oil plant leaves (Jatropha curcas) can increase the calorific value and its usefulness as fuel. The variations of the castor oil leaf adhesive mixture used are 10%, 20%, and 30% as well as variations in the size of mahogany sawdust charcoal grains 35 mesh, 60 mesh, and 100 mesh. The briquette with the best composition produced is variation A1B1, namely a briquette with a 10% adhesive mixture and a particle size of 35 mesh (particle size ≃ 0.5 mm) with a calorific value of 6,122 cal/g, water content of 5.62%, ash content of 6.46% and has met the quality standards for charcoal briquettes according to SNI 1-6235-2000
Arang Kulit Biji Kakao (Theobroma cacao L) sebagai Adsorben untuk Menurunkan Kadar Asam Lemak Bebas pada Pembuatan Biodiesel dari Minyak Jelantah Prasetyo, Dafit Ari; Saputro, Muhammad Rio Aditya; Ulma, Zeni
Jurnal Teknik Terapan Vol. 2 No. 1 (2023): April
Publisher : P3M Politeknik Negeri Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25047/jteta.v2i1.22

Abstract

Indonesia as one of the largest producing and exporting countries of crude palm oil (CPO). However, Indonesia still has not utilized the potential of the waste that generated by using CPO as cooking oil, namely used cooking oil. The high content of free fatty acids (FFA) in used cooking oil will cause the saponification reaction and interfere the processing into biodiesel. Cocoa bean shell charcoal (Theobroma cacao L) has a K2CO3 content similar to its commercial product, and contains some traces of silicates and sulfates so that it can increase the efficiency of reducing free fatty acids. In this study, tests were carried out to reduce FFA levels in used cooking oil using charcoal from cocoa bean husks activated with HCl, varying the concentrations of 6, 8 and 10 Molar, as well as the temperature treatment during the process of mixing used cooking oil with activated charcoal adsorbent, which was 75 , 100, and 150°C. The best FFA reduction results were found in the A3T2 reactor which reached 80%, where the best HCl concentration was 10 Molar and the temperature of the mixing process with the adsorbent was 100°C and produced a biodiesel yield of 75%. The quality of the biodiesel produced complies with SNI 7182-2015 standards, 867 kg/m3 of density, 0.5 mg KOH/g of acid number, 1.52 cSt of kinematic viscosity, 48.081 MJ/kg of calorivic value and 143.99%- mass of methyl ester content.
Analysis of biodiesel process from waste cooking oil using heterogeneous catalyst field snail shell (pila ampullacea) Ridho, Ainur Rosyid; Prasetyo, Dafit Ari; Susmiati, Yuana; Ulma, Zeni
Jurnal Polimesin Vol 22, No 2 (2024): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i2.4287

Abstract

Biodiesel is an alternative fuel in the form of Fatty Acid Methyl Ester (FAME) which can be renewed using vegetable oils and animal oils through esterification or transesterification processes. This study used waste cooking oil as a raw material for biodiesel with a CaO catalyst from the shells of field snails (Pila ampullacea) which were calcined for 4 hours at a temperature of 700°C. This experiment aim to study of the effect of temperature (55°C, 60°C, 65°C) and catalyst weight (4%, 6%, 8%), for 2 hours the transesterification process and the molar ratio of oil to methanol was 1:9. Crude Biodiesel from the transesterification process washed using dry washing method with activated coconut shell charcoal which has been activated using 1M H3PO4. Based on this research, the optimum yields about 91,5%-volume, were obtained in A2T2 with temperature 60°C and a catalyst weight of 6% with a biodiesel yield of 91.5%. The characteristics of the biodiesel produced were kinematic viscosity 3.32 cSt, density 863 Kg/m3, acid number 0.543%, iodine number 14.3%-mass, methyl ester content 169.12% and cetane number 43.28%-mass.
Co-Authors ATTHOILLAH, EDY Cahyaning Nur Karimah, Cahyaning Nur FAUZI, HILMIY AHMAD Fitri, Zilvanhisna Emka Hikmah, Lailatul NAJAMUDDIN, AHMAD NANDA Nur Faizin Ridho, Ainur Rosyid Safitri, Nadia Ayu Saputro, Muhammad Rio Aditya Sholikah, Umi Ulma, Zeni Ulvi Pri Astuti Violita, Elvira Anne Wicaksono, Damar Canggih Yuana Susmiati Yuli Hananto, Yuli