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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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Probabilistic Estimation of Bromate Exposure from the Consumption of Bottled Drinking Water Distributed in the Bogor Region Handayani, Yani; Giriwono, Puspo Edi; Herawati, Dian
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 6 (2025): December 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i6.2057-2068

Abstract

Bottled drinking water is a source of human exposure to bromate, a disinfection by-product (DBP) with adverse health effects and carcinogenic potential. Little is known about bromate exposure levels and risk characterization, particularly in Bogor, Indonesia. The study aimed to obtain data on bromate concentrations in bottled drinking water, estimate bromate exposure levels based on individual consumption, and assess the risk characterization. Bromate exposure were calculated based on bromate concentrations and individual consumption, across five age groups. Bromate exposure and risk characterization were estimated probabilistically using Monte Carlo simulation. In this study, 37 bottled drinking water samples were collected from large and small manufacturers and retailers in Bogor and analyzed for bromate content. Bromate was detected in 30 samples, with 5 samples exceeding the Indonesian national standard of 10 µg/L. The average concentration was 6.88±8.88 μg/L. Exposure estimates indicate that, for all age groups, the average and 95th percentile values are 0.1086±0.0484 µg/kg BW/day and 0.4044 µg/kg BW/day in Bogor and 0.1492±0.2820 µg/kg BW/day and 0.5495 µg/kg BW/day in Indonesia, respectively. Values below the tolerable daily intake (TDI) limit for non-cancer risk, so the risk characterization for all age groups can be considered as safe.
Improvement of the Conditioning Process to Enhance the Quality of Vanilla (Vanilla planifolia) Syahrullah, Andi Ulfa Hardianty; Budiastra, I Wayan; Mardjan, Sutrisno
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 6 (2025): December 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i6.2131-2144

Abstract

The quality of national vanilla still does not fully meet national and international standards, one reason is the suboptimal conditioning process, namely, the final storage stage to stabilize quality. This study aims to examine the effect of packaging type, combined with temperature and conditioning duration, on vanilla's physical, chemical, sensory, and microbiological quality, and determine the best treatment combination in producing vanilla quality that meets SNI. Factorial Completely Randomized Design (CRD) was used in this experiment with three factors namely different material packaging (wax paper and HDPE plastic), various temperatures storage (25 °C, 30 °C, 35 °C), and conditioning durations (1, 1.5, and 2 months). Results showed that temperature, type of packaging, and conditioning duration significantly affect most of the physical, chemical, and microbiological quality parameters of vanilla, except for ash content and organoleptic aroma, which are not significantly different. The best treatment combination was obtained using HDPE packaging with a temperature of 35 °C for 1.5 months of conditioning, producing quality according to SNI 01-0010-2002 with high vanillin content and stable color. However, the total microbial count (TPC) in this treatment still exceeded the limits set by FAO.
Optimization of Sugar Reduction using Steviol Glycoside for Ready-to-Drink Sweetened Tea Mintarsih; Andarwulan, Nuri; Adawiyah, Dede Robiatul
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 6 (2025): December 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i6.2091-2101

Abstract

Excessive sugar consumption is a major contributor to increased calorie intake and the rising prevalence of obesity, particularly through sweetened ready-to-drink (RTD) teas. This study aimed to optimize formula of reduced sugar RTD tea using steviol glycoside as sweetener, in combination with maltodextrin and xanthan gum, through a mixture design approach. Steviol glycoside next called as stevia is a zero-calorie natural sweetener with a sweetness intensity approximately 300 times of sucrose. Maltodextrin was employed as filler, while xanthan gum was added to improve mouthfeel. The optimized formulation achieved a 2% reduction in sugar content using 0.009% stevia, 0.029% xanthan gum, and 1.962% maltodextrin. A reference product was formulated based on the most popular RTD jasmine black tea in the Indonesian market, which contains 7.7% (b/v) sugar per 100 mL. Result of spectrum descriptive analysis (SDA) sensory evaluation, conducted before and after ultra-high temperature (UHT) processing, showed no significant differences in sweetness, mouthfeel, astringency and jasmine aroma attributes. Compare to reference, in 100 mL product, sugar content was reduced from 7.68 to 5.78%, while total calorie slightly decreased from 30.71 to 30.13 kcal. In addition, the cost is slightly more expensive by IDR 126 per 350 mL package.
Utilization of Rice Flour and Soy Flour with the Addition of Xanthan Gum for Making Gluten-Free White Bread Yulistiani, Ratna; Ambarwati, Peni; Pratiwi, Yunita Satya; Wardianto, Muhammad Rosyid
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 6 (2025): December 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i6.2080-2090

Abstract

Gluten-free white bread formulated with rice and soy flour offers a safe alternative for individuals with celiac disease. Since gluten is absent, xanthan gum is added to improve gas retention and dough structure. This study aimed to identify the optimal formulation of gluten-free white bread by evaluating the physical, chemical, and sensory characteristics of various combinations of rice flour, soy flour, and xanthan gum, as well as analyzing the bread microstructure using Scanning Electron Microscopy (SEM). A Completely Randomized Design (CRD) with two factors- rice flour to soy flour ratios (90:10, 80:20, 70:30) and xanthan gum levels (1%, 2%, 3%)- was performed with three replications. Results showed that the best formula is rice flour to soy flour ratios of 80:20 combined with 3% xanthan gum. The bread had 39.26% water content, 1.26% ash, 10.96% fat, 8.22% protein, and 40.30% carbohydrates. Physically, it had a textural strength of 19.85 N, volume expansion of 82.64%, and porosity of 24.00%. Sensory scores (1-5 scale) were 4.24 (color), 3.92 (aroma), 3.96 (taste), and 4.68 (texture). SEM revealed that the gluten-free bread had larger and less uniform pores. These findings highlight formulation potential to enhance gluten-free bread quality and sensory acceptance.
Irrigation Deficit for Ciherang Rice Variety as a Benchmark for Developing Upland Rice Cultivation Systems Widata, Sri; Zamroni, Zamroni; Arnanto, Driska; Darnawi, Darnawi; Baharudin, Ahmad Ferry; Yunianta, Yunianta; Sudrajat, Ignatius Suprih
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 6 (2025): December 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i6.2164-2170

Abstract

This study aims to evaluate the agronomic response of Ciherang rice plants during the vegetative and generative phases under deficit irigation conditions, as a benchmark for cultivation in dry land. This study used a factorial Completely Randomized Design with two factors. First, the level of water efficiency consisting of three levels, namely 300 ml, 600 ml, and 900 ml; second, the ratio of cattle manure and urea fertilizer also consisting of three levels, namely 80:20, 50:50, and 20:80. The observed variables include vegetative phase parameters, such as plant height, number of tillers, and dry weight of biomass, as well as generative phase parameters, such as percentage of filled grains and weight of filled grains per clump. The results showed that there was a significant interaction between water efficiency and fertilizer ratio during the generative phase, but no similar interaction was found during the vegetative phase. Furthermore, the combination of 600 ml water treatment with a 50:50 fertilizer ratio produced the highest percentage of filled grains and weight of filled grains. These results indicate that Ciherang rice can grow well under efficient water conditions, making it potentially suitable for cultivation in dry land.
A Financial Feasibility Analysis and Supply Chain of XYZ Rice Polishing Business Priyanto, Agus; Ekowati, Titik; Komalawati
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 6 (2025): December 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i6.2273-2284

Abstract

The increasing demand for premium rice in Indonesia has opened up opportunities for rice polishing businesses to increase added value and competitiveness. Challenges such as rising raw material prices, increased operational costs, and process efficiency have become obstacles in maintaining the sustainability and competitiveness of these businesses. This study aims to analyze the financial feasibility and supply chain structure of the rice polishing business at UD XYZ, ABC Regency, South Sulawesi. A case study method was used with a quantitative and qualitative descriptive approach. The financial analysis included NPV, IRR, B/C ratio, PI, ROI, payback period, and sensitivity analysis. The supply chain structure is analyzed through product, financial, and information flow mapping. The results show that UD XYZ is a small-scale business and is financially feasible to operate with a positive NPV, IRR higher than the benchmark interest rate, B/C and PI greater than 1, profitable ROI, and good financial indicators, although it is vulnerable to variable cost increases of more than 2%. The supply chain is relatively short, from rice milling to end consumers. These findings have important implications for business actors and policymakers in the development of the rice polishing industry in production centers.
Ergonomic Redesign of Farm Tools to Reduce Musculoskeletal Disorders among Nigerian Farmers Unegbu, Hyginus; Yawasa, D.S
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 6 (2025): December 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i6.2297-2315

Abstract

The persistent prevalence of musculoskeletal disorders (MSDs) among Nigerian smallholder farmers remains a critical occupational health challenge, largely due to the prolonged use of poorly designed manual farm tools. This study investigated the ergonomic redesign of traditional hoes and cutlasses using a simulation-augmented, mixed-method experimental design aimed at reducing biomechanical stress and enhancing task efficiency. A total of 220 farmers (aged 18–65, with gender-balanced representation) from southwestern Nigeria participated in the study, ensuring population diversity and practical relevance. Redesign was guided by computer-aided design (CAD) modelling, finite element analysis (FEA), and field-collected anthropometric datasets. Key ergonomic indicators included Rapid Entire Body Assessment (REBA) for postural risk, surface electromyography (EMG) for muscle fatigue, task completion time, and the Borg Rating of Perceived Exertion (RPE) for perceived effort. Results showed statistically significant improvements (p < 0.01) across all performance metrics. REBA scores decreased from high to moderate/low risk categories, EMG activity reduced by over 30%, and task completion time improved by 33–36%. RPE scores were halved, indicating increased user comfort. Effect sizes (Cohen’s d > 1.2) confirmed the strong practical impact of the redesigned tools. While limited by short-term field exposure and a regional study scope, the research offers a replicable model for ergonomic tool development in informal agricultural systems. The findings support actionable interventions such as standardised tool design guidelines, local manufacturing protocols, and farmer training programmes. This study demonstrates that ergonomic simulation using CAD and biomechanical tools can lead to meaningful reductions in MSD risk, improved task performance, and higher usability in resource-limited farming environments.

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