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All Journal EDUCATIONE: Journal of Education Research and Review
Nody Poluan Sompie
Politeknik Negeri Manado
Education Social Sciences

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BIOMASS WASTE-TO-ENERGY EXPERIMENTS FOR SUSTAINABILITY EDUCATION: DEVELOPMENT AND EVALUATION OF BIOBRIQUETTE LEARNING ACTIVITIES Aldo Akwila Richie Pongantung; Tineke Saroinsong; Nody Poluan Sompie
EDUCATIONE Vol. 4 No. 2 (2026)
Publisher : CV. TOTUS TUUS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59397/edu.v4i2.311

Abstract

Growing energy demand and the accumulation of agricultural and agro-industrial residues motivate the development of solid biofuels from locally available biomass. This study evaluated how three ratios of patchouli oil distillation waste (PW) and rice husk (RH)—20:80, 30:70, and 40:60—affected biobriquette moisture content, ash content, volatile matter, and combustion rate. Each formulation contained 12% tapioca adhesive and was compacted at 4,252 kPa. Three reported laboratory measurements per formulation were summarized descriptively as mean ± standard deviation, while combustion rate was represented by one reported value per formulation. Moisture increased from 12.78 ± 0.30% to 19.39 ± 0.61%, ash decreased from 41.19 ± 0.30% to 29.81 ± 1.79%, and volatile matter increased from 33.39 ± 0.20% to 47.07 ± 2.45% as the PW proportion increased. The reported combustion rate increased from 0.3028 to 0.5849 g/s. The 20% PW–80% RH formulation offered the lowest moisture content and slowest mass loss but the highest ash content, indicating a clear property trade-off rather than a universal optimum. All formulations exceeded the study’s SNI 01-6235-2000 benchmark limits for moisture, ash, and volatile matter. The findings support this waste combination as a preliminary biomass-valorization pathway and identify drying, carbonization, binder optimization, and broader fuel-quality testing as priorities before practical deployment.
Low-Power Grass Chopping Machine Performance as an Authentic Project for Vocational Engineering Education Valentino Massie; Hani Ruland Massie; Franklin Bawano; Nody Poluan Sompie; Djefry Paulus Hosang; Fransiscus Josep Tulung
EDUCATIONE Vol. 5 No. 1 (2027): (Issue in Progress)
Publisher : CV. TOTUS TUUS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59397/edu.v5i1.317

Abstract

Background and Objective: Vocational engineering education requires authentic projects that connect design, fabrication, measurement, testing, and evidence-based improvement, yet technical machine studies are rarely organized as reusable educational cases. This study evaluated a compact low-power grass chopping machine and examined its suitability as an authentic project case for vocational engineering education. Methods: An experimental engineering design was conducted from February to August 2026 using a FLASH-250G 1/4-HP motor, one 1.6-mm steel-plate blade, and a compact steel frame. Elephant, odot, and sansibar grass were tested at 1-5 kg loads. Rotational speed, chopping time, and post-chopping mass were recorded, and three test series were averaged for each condition; analysis was descriptive because run-level dispersion data were unavailable. Results: The machine completed all reported conditions at 2,457-2,978 rpm. Chopping time increased from approximately 2-3 minutes at 1 kg to approximately 10 minutes at 5 kg, with descriptive load-time slopes of 116.28-121.41 seconds/kg. Derived batch processing rates were approximately 22.49-29.37 kg/h. Conclusion: The prototype demonstrates functional feasibility under the reported conditions and provides a technically grounded authentic-project structure for vocational engineering learning in design, fabrication, measurement, safety, data interpretation, and redesign. Educational effectiveness was not tested and requires direct student-outcome evidence.
Co-Authors Aldo Akwila Richie Pongantung Djefry Paulus Hosang Franklin Bawano Fransiscus Josep Tulung Hani Ruland Massie Tineke Saroinsong Valentino Massie