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- Publications by researchers, faculty members, staff, and students of DMMMSU.
- A "lakasa" (storage) for the information materials related to La Union, Ilokano, and Iloko.
Recent Submissions
Development of a compact charcoal briquetting machine from carbonized rice husk
(Don Mariano Marcos Memorial State University – Mid La Union Campus, 2026) Acosta, Clayvon D.; Mamaradlo, Daryll C.; Mangoba, Joshua C.; Pimentel, Kyle Anthony A.; Quinzon, Bennie N.
This study developed a compact charcoal briquetting machine using carbonized rice husk as a sustainable biomass resource. It aimed to design, fabricate, and evaluate the machine’s performance in terms of production rate, efficiency, briquette quality, and economic viability using a project developmental and experimental approach. The machine, measuring 24.5" × 22" × 34", is powered by a 1 hp motor with a 100:1 gearbox for effective biomass compression. Results showed a production rate of 9 briquettes per 16.364 minutes and an efficiency of 88.52%, indicating reliable operation. The briquettes produced had acceptable fuel properties, with 26.112% moisture content, 9.41% volatile matter, 1.46% ash content, and 63.02% fixed carbon. Economic analysis revealed feasibility, with a break-even point at four units, a payback period of eight months, and a benefit–cost ratio of 1.5. Overall, the machine is technically effective and economically viable for small- to medium-scale use, providing an environmentally friendly solution for converting rice husk waste into fuel.
Design and development of molding system for soft plastics into construction boards
(Don Mariano Marcos Memorial State University – Mid La Union Campus, 2026) Garcia, Bill Andrei E.; Cabidog, Darreilyn S.; Laurian, Jenvher Rainiel F.; Renon, Ashly R.; Tiri, Hyacinth Irish A.
This study presents the development of a molding system for soft plastics into construction boards, which falls under the field of manufacturing and recycling technology. The machine is designed to convert waste soft plastics into useful construction materials such as ceiling boards through an integrated process of melting, compressing, and shaping. The system is composed of key components, including heating elements (heating coils), linear actuators, and a mechanical lever mechanism connected to a lever rod. The heating coils are responsible for melting the shredded soft plastics, while the linear actuators and mechanical lever system provide the necessary compressive force to mold the material into desired shapes. The primary objective of the study is to design and evaluate the performance of the machine in terms of molding and heating speed, as well as molding efficiency. Results of the study demonstrate that the developed system is capable of producing construction boards from recycled soft plastics, contributing to waste reduction and promoting sustainable construction practices.
Development and performance of mechanized disposable plastic bottle shredder
(Don Mariano Marcos Memorial State University – Mid La Union Campus, 2026-01) Mandap, John John C.; Cortado, Daren T.; Mendoza, Jimuel P.; Paladan, Vanessa J.; Ulidan, Nicole R.
Plastic waste, particularly from Polyethylene terephthalate (PET) and High-density polyethylene (HDPE) bottles, is an escalating environmental and health concern. Improper disposal of these bottles contributes to pollution and the spread of microplastics. Polyethylene terephthalate (PET) and High density polyethylene (HDPE) bottles are highly engineered materials made from petrochemicals and are typically designed for single-use, meaning they are discarded immediately after use. Upon using repeatedly, certain chemicals in the plastic may leach into food and beverages. Leaching is the transfer of chemicals from the packaging into the contents. In order to reduce the size of PET bottles, the study proposes the Mechanized Disposable Plastic Bottle Shredder (MDPBS). It is powered by a3 HP motor, the machine presents a single-shaft design with spacers attached between steel blades, contributing a solution for small to medium-scale operations. The machine helps manage plastic waste, reduces its volume, and promotes convenient recycling. By addressing the plastic waste problem, the MDPBS contributes to environmental sustainability, lessen the pollution, and supports a circular economy, which benefits both ecosystems and human health.
Development of an automated proto-type honey extractor for honeybees (Apis mellifera L.)
(Don Mariano Marcos Memorial State University – Mid La Union Campus, 2025-12) Velasco, Julie-Ann G.; Dayag, Justine Rey Patrick L.; Matias, Jude D.; Parrocha, Kent Charles T.; Solamillos, Samuel James C.
This study examined the development of an automated prototype honey extractor for honeybees (Apis mellifera L.) to enhance extraction efficiency and reduce manual labor for beekeepers. The study aimed to design and fabricate an automated honey extractor, evaluate its performance, and determine its production cost. A developmental research design was employed, involving the design, fabrication, testing, and evaluation of the prototype. The extractor was constructed from stainless steel and powered by a ¼-hp electric motor capable of extracting honey from six shallow hive frames at once through centrifugal force. Performance testing was conducted at the National Apiculture Research, Training and Development Institute (NARTDI) in Bacnotan, La Union. The machine was evaluated based on extraction efficiency, throughput capacity, operating time, and rotational speed at extraction durations of one to four minutes. Data were analyzed using arithmetic mean and Analysis of Variance (ANOVA). Results showed extraction efficiency ranging from 96.65% to 100%, with the highest throughput capacity of 5.14 kg/min achieved during the first minute of operation. ANOVA results indicated that extending extraction time beyond one minute did not produce a statistically significant increase in honey yield. The total fabrication cost was ₱27,008.48, demonstrating economic feasibility. Overall, the prototype provides efficient extraction.
Electrical audit of College of Engineering Building DMMMSU – MLUC
(Don Mariano Marcos Memorial State University – Mid La Union Campus, 2025-04) Malamion, Yesha D.; Angelew, Annie Murrey S.; Arsitio, Mark Darrel T.; Ormita, Jerome Claude C.; Ramos, Christeane Jhoyce P.
This study highlights the importance of electrical audits as a strategic approach to improving energy efficiency and reducing operational costs in industrial settings, particularly in universities. Conducted at Don Mariano Memorial State University, Mid La Union Campus – College of Engineering building, the audit focused on evaluating the building's energy consumption, excluding the heating and ventilation system. Using a descriptive-evaluative research design, the study analyzed energy usage patterns, including lighting, electrical equipment, insulation, and overall energy management practices through various electrical testing tools. The audit found that while most over- current protection devices complied with the Philippine Electrical Code (PEC), issues were identified with the insulation resistance of conductors, which failed to meet PEC standards. As technological advancements led to more equipment being installed, proper evaluation became crucial. It aims to propose practical recommendations to reduce energy wastage, optimize consumption, and enhance sustainability, ultimately supporting more cost- effective and environmentally responsibleinfrastructure management.