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Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering)
Published by Universitas Lampung
ISSN : 2302 559X     EISSN : 2549 0818     DOI : -
Core Subject : Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Engineering
Jurnal Teknik Pertanian Lampung or Journal of Agricultural Engineering (JTEP-L) is a peer-reviewed open-access journal. The journal invites scientists and engineers throughout the world to exchange and disseminate theoretical and practice-oriented researches in the whole aspect of Agricultural Enginering including but not limited to Agricultural Mechanization, Irrigation, Soil and Water Engineering, Postharvest Technology, Renewable Energy, Farm Structure, and related fields. The first issue was published in October 2012 by Department of Agricultural Engineering, Faculty of Agriculture, University of Lampung. Jurnal Teknik Pertanian Lampung has ISSN number 2302 - 559X for print edition on October 10, 2012 then 2549 - 0818 for online edition on January 10, 2017. Jurnal Teknik Pertanian Lampung is issued periodically four times a year in March, June, September, and December. Jurnal Teknik Pertanian Lampung has been indexed by Google Scholar, Crossref, Directory Open Access Journals (DOAJ), and CABI. Since Volume 5 Issue 1 (2016) Jurnal Teknik Pertanian Lampung has been accredited as SINTA 3 by Directorate General of Higher Education (DIKTI). Starting Volume 10 Issue 3 (2021) the journal received accreditation SINTA 2.
Arjuna Subject : -
Articles 1,077 Documents
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Study of Spray Fogging Performance Using a Combination of Fogging Machine, Electric Sprayer, and Air Blower Gatot Pramuhadi; Josua Natanael; Nenda Fuji Putri Daliesta
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 14, No 3 (2025): June 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i3.866-878

Abstract

This study aims to determine and analyze the parameters of spray fogging performance for the application of pesticide fog. Air blower spraying performance can be increased by regulating the type of fan and type of air blower. Setting the type of fan in air blower is axial fan and centrifugal combined with cone of 4, 6, and 8 holes. The most optimum combination of the test treatment is the combination of axial fan air blower and 4-hole cone. Spray fogging can be increased by adjusting the combination spray angle between fogging machines and air blowers at various observation distances. The combination spray angle setting is angle of 15°, 30°, and 45° and the observation distance of 1 meter to 4 meters. The results of the analysis and determination of spray fogging performance parameters produce an angle of 45° as the most optimum spray angle from the observation distance of 1 meter to 4 meters. This is indicated by the average value of the droplet diameter of 78.74 μm, a 70 droplet/cm2 droplet density, an air flow speed of 1.97 m/s, and the temperature of the flocking of 31.8℃. Keywords: Air blower, Droplets, Fogging, Nozzle, Spray.
Portable Near-Infrared Spectroscopy and Support Vector Regression for Fast Quality Evaluation of Vanilla (Vanilla planifolia) Widyaningrum Widyaningrum; Yohanes Aris Purwanto; Slamet Widodo; Supijatno Supijatno; Evi Savitri Iriani
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 14, No 2 (2025): April 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i2.515-526

Abstract

Vanilla (Vanilla planifolia) is a high-value agricultural product, with its quality influenced by essential factors such as moisture and vanillin content. Conventional techniques for evaluating these characteristics are inefficient, require sample destruction, and are impractical for swift assessments. This research explores the feasibility of using portable Near-Infrared (NIR) spectroscopy combined with Support Vector Regression (SVR) to enable quick and noninvasive property prediction. Spectral information was obtained from vanilla samples using two portable NIR instruments, SCiO (740–1070 nm) and Neospectra (1350 2550 nm). Preprocessing techniques such as normalization, SNV, MSC, first derivative, first derivative-SNV, and first derivative-MSC were applied. For moisture content prediction, SCiO achieved an R² of 0.768, an RMSE of 4.720%, an RPD of 2.075 and an RER 10.197 using Min-Max normalization, while Neospectra yielded an R² of 0.758, an RMSE of 5.161%, an RPD of 2.033 and an RER 9.325 with MSC preprocessing. In contrast, predicting vanillin concentration proved more challenging, with SCiO achieving moderate accuracy with an R² 0.406, an RMSE 0.379%, an RPD 1.297, an RER 5.039, and Neospectra demonstrating limited performance with an R² 0.172, an RMSE 0.576%, an RPD 1.098 and an RER 3.315. These findings highlight the potential of portable NIR spectroscopy as a practical tool for assessing vanilla quality, particularly for moisture content, in industrial and field applications. Keywords: Moisture content, Portable NIR spectroscopy, Support vector regression, Vanilla planifolia, Vanillin content.
The Impact of Geometry Engineering on Combustion Efficiency and Emissions: Performance Evaluation of Axial Diffuser Tube, Perforated Distribution Node, and Symmetrical Axial Radiator Jameel Al-Naffakh; Mohammed R. Al-Qassab; Abdulhussein H.J; Israa Jafar Jafar
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 14, No 3 (2025): June 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i3.744-754

Abstract

With increasing environmental concerns about emissions, improving combustion systems for alternative fuels, such as used engine oil, has become imperative. Investigating innovative burner designs to enhance fuel-air mixing, reduce emissions, and stabilize performance presents challenges due to high viscosity and incomplete combustion. However, previous research has not adequately addressed the role of burner head geometry in mitigating these problems. A combination of experimental tests and computational fluid dynamics (CFD) simulations was used to evaluate the performance. This study aims to fill the gap by evaluating the effects of three burner head designs—axial diffuser tube, perforated distribution node, and symmetrical axial cooler—on combustion efficiency and emissions. The results indicate that the axial diffuser tube achieved the highest efficiency (94.3%) and lowest emissions (NOx: 128 ppm, CO: 52 ppm, PM: 18 μg/m3) due to uniform heat distribution and increased turbulence. The perforated distribution node showed a balanced performance, with an efficiency of 91.7% and moderate emissions (NOx: 145 ppm, CO: 65 ppm, PM: 24 μg/m³). Meanwhile, the symmetric axial cooler, designed for thermal stability, showed lower efficiency (89.6%) and higher emissions (NOx: 167 ppm, CO: 78 ppm, PM: 30 μg/m³). The results indicate the importance of burner engineering in balancing efficiency and emissions control. The results of this study support sustainable combustion technologies for industrial and domestic applications, and underscore the global transition to clean energy solutions. Keywords: Burner head design, CFD simulations, Combustion efficiency, Emissions reduction, Geometric engineering, Waste automotive oil.
Performance Analysis of Disc Mill Type FFC-15 Grinder for Making Charcoal Husk Flour Ridwan Siskandar; Billi Rifa Kusumah; Lusia Cipto Astuti
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 13, No 4 (2024): December 2024
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v13i4.1121-1131

Abstract

This study is motivated by the great potential of rice husk as a waste material that has not yet been optimally utilized. The focus of this research is to evaluate the performance of the FFC-15 disc mill machine in producing flour from rice husk charcoal at three different moisture contents. The variations in the moisture content of rice husk charcoal studied were 10%, 15%, and 20%, with the goal of determining the optimal conditions in the production process of rice husk charcoal flour. The methodology used is experimental with repeated testing to produce data on machine capacity, electrical power consumption, flour yield, flour quality (moisture content, ash content, and mineral content), and the physical parameters of the charcoal. The results show that moisture content significantly affects the milling efficiency and quality of the flour produced, with optimal conditions achieved at a moisture content of 10%. Adjusting the moisture content before the milling process can enhance the operational efficiency of the machine and the quality of the final product. These findings are expected to provide benefits for follow-up by a group or industry that wants to optimize the utilization of rice husk charcoal. Keywords: Disc mill FFC-15, Flour quality, Husk charcoal, Milling efficiency, Moisture content.
Evaluation of Eucheuma cottonii and Gracilaria sp. as Food Buffer for The Ibu Kota Nusantara (IKN) Based on Proximate Analysis Gevbry Ranti Ramadhani Simamora; Amalia Nur Kumalaningrum; Siti Munfarida; Olga Galih Rakha Siwi
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 14, No 3 (2025): June 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i3.836-845

Abstract

East Kalimantan Province has great opportunities as a buffer for the IKN economy based on the utilization of marine potential. Eucheuma cottonii and Gracilaria sp. are the red seaweeds (Rhodophyta) most widely cultivated in Indonesia. This study aims to analyze the proximate content in two types of red seaweed, namely E. cottonii (offshore cultivation) and Gracilaria sp. (pond cultivation) obtained from farmers in dry conditions cultivated around the waters of Balikpapan, East Kalimantan, Indonesia. The results of the analysis showed significant differences between cultivation locations. Gracilaria sp. (pond cultivation) taken from Handil (HTK) and Babulu Laut (BALUKE) is considered potential because it has low water content (HTK 26.99 ± 0.02%), and has higher ash content (BALUKE 31.18 ± 0.41%), fat (BALUKE 0.36 ± 0.01%), protein (BALUKE 10.01 ± 0.01%), and crude fiber (HTK 1.90 ± 0.16%) compared to E. cottonii. These findings provide important information for the development of seaweed as a natural resource for the food and health industries. Keywords: Eucheuma cottonii, Food industry, Gracilaria sp., proximate content, Red seaweeds
Cover Vol 14 No 3, June 2025 jtep jtep
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 14, No 3 (2025): June 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i3.%p

Abstract

Optimization of Suction Channel System on Vacuum-Type Soybean Seed Metering System Powered by Hand Tractor Adhiasta Faris Setiabudi; Wawan Hermawan; Radite Praeko Agus Setiawan
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 14, No 2 (2025): April 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i2.391-403

Abstract

A vacuum-type soybean seeder powered by hand tractor for Indonesia’s local soybean has been developed to overcome soybean low productivity. The developed machine still has a weakness in the context of the suction channel system. This research was conducted to optimize the suction channel system efficiency, suction performance for bigger type of seed variety, and suction effect uniformity on all metering device. The research step consisted of seed characteristic measurement for two Indonesia’s common local soybean seed variety (Anjasmoro and Grobogan), suction channel system modification and analysis, and validation based on computational fluid dynamic (CFD). The result in this research are proposed 3-types of optimized model with final selection of 1-type of model, namely Branch model. The values produced by the optimized model compared to existing model respectively 3.393 kPa (CV 0.10%) and 3.112 kPa (CV 1.54%) for negative pressure, 14.39 m/s (CV 4.11%) and 9.08 m/s (3.44%) for suction velocity, as well as 117.342 Pa and 118.147 Pa for total pressure-loss. The required value for Anjasmoro and Grobogan seed variety respectively 3.094 kPa and 3.358 kPa for negative pressure pressure, as well as 10.22 m/s and 10.03 m/s for suction velocity. Hence, the selected optimized model is more efficient, uniform, and can accommodate required negative pressure pressure and suction velocity for both Anjasmoro and Grobogan, while the existing model can only accommodate Anjasmoro. Keywords: CFD, Metering device, Optimization, Pneumatic, Soybean.
Chickpea Plant Results Due to Liquid Organic Fertilizer Waste from Leaf Vegetable Waste and Tofu Liquid Waste Lena Walunguru; Marsema Kaka Mone
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 14, No 2 (2025): April 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i2.604-612

Abstract

The use of organic fertilisers represents an effective and sustainable approach to enhancing soil quality. Purpose of this study is to determine the influence of several concentrations of liquid organic fertilizer (LOF) made from leaf vegetable waste and liquid waste and to find out the concentration that has the best effect on chickpea yield. The experiment used a randomized group design (GRD), consisting of 11 treatments, repeated three times. The treatment tested was the concentration of LOF from leaf vegetable waste and tofu liquid waste, namely 0, 25, 50, 75, 100, 125, 150, 175, 200, 225, and 250 ml/l. The data were analyzed with ANOVA, if significant, a further test is carried out with an Honest Significant Difference (HSD) 5%. Observation variables were 1) Plant growth, namely height of plant, leaves amount, diameter of stem, and branches amount, and 2) Plant yield, namely the pods amount, length of pod, weight each of pod, and pod weight each plant. Results of the study that concentration of 250 ml/l had a better effect on amount of pods (56.75 pods), pod length (19.29 cm), weight each pod (10.62 g), and pod weight each chickpea plant (602.17 g). Keywords:   Concentration, Leaf vegetable waste, Liquid organic fertilizer, Growth and yield of chickpea, Tofu liquid waste
Biosorption Performance of Biochar from Exhausted Kahwa Coffee on Cadmium Removal Under Various Operational Parameters Nika Rahma Yanti; Aninda Tifani Puari; Frisca Lora Amalya; Rusnam Rusnam; Rahmi Awalina
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 14, No 3 (2025): June 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i3.764-771

Abstract

The primary goal of this study was to investigate the biosorption performance of biochar derived from exhausted kahwa coffee (EKC) on removing heavy metal ion, Cd²⁺ in the solution. The operational parameters, for instance pH, dosage and contact time, were varied in a certain range and the efficiency and the capacity of removal were determined. The pH was in a range of 5 – 11, while the biochar dosage in a range of 0.075 – 0.15 g and the contact time was in between 30 – 180 minutes. The batch biosorption test showed that the EKC biochar had higher removal performance in alkaline condition, with a proposed pH of 10. Meanwhile, the applied dosage showed that addition of 0.1 g EKC biochar was more effective than adding more dosage. Furthermore, the batch experiments showed that 60 minutes of biosorption process resulted in more effective removal compared to the longer biosorption time. According to the ANOVA analysis on the three conditions, it was shown that the pH and contact time had significant effects on the removal performance of EKC biochar on cadmium ion in the solution.  Keywords: Biochar, biosorption, Exhausted kahwa coffee, Heavy metal ion, Operational parameters.
Study on Chemical Components and Antioxidant Activity of Cream Products Made of Telang Flower (Clitoria ternatea L.) and Honey Sahira Josy Arifannisa; Dewi Sartika; Sussi Astuti; Tanto Pratondo Utomo; Suharyono Suharyono
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 14, No 3 (2025): June 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i3.755-763

Abstract

Facial skin is most often exposed to UV rays and various disorders that need special creams with active ingredients containing antioxidant properties. This study aims to determine the chemical compounds of butterfly pea or telang flower (Clitoria ternatea L.) and determine the antioxidant activity of its cream products. Six treatments consisted of ratio flower extract to honey were performed. The chemical components of telang flower were determined by GCMS method and antioxidant activity test using DPPH method. Results showed that major compound with retention at 23.989; 27.039; and 27.641 min were hexadecanoic acid, oleic acid, and octadecanoic acid with area percentage of 32.70%; 28.92%; and 15.42%, respectively. In addition, there were 5 minor compounds including palmitoyl chloride with retention 28.710 min and area of 7.07%, glycidyl palmitate (retention 18.767 min, area of 5.76%), Heptacosanol (retention 22.818 min, area of 3.01%), Nitroisobutylglycerol (retention 18.059 min, area of 4.50%), and Hydroxymethylfurfural (retention 14.324 min, area of 2.61%). Based on the antioxidant activity test, the highest antioxidant activity results were found in cream formulation 1 (F1) with an IC50 of 3.906 μg/mL, followed by cream formulation 2 (F2) which has antioxidant activity after of 6.532 μg/mL. Keywords: Antioxidant activity, Telang flower, DPPH, GCMS, Honey.

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