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All Journal The Indonesian Journal of Business Administration International Journal of Innovation in Mechanical Engineering and Advanced Materials
Murdiyati, Sari
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Automotive Engineering Decision Sciences, Operations Research & Management Energy Engineering Materials Science & Nanotechnology Mechanical Engineering

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Multicriteria decision making to assess waste to energy in Indonesia Murdiyati, Sari; Sunitiyoso, Yos
The Indonesian Journal of Business Administration Vol 7, No 1 (2018)
Publisher : The Indonesian Journal of Business Administration

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Abstract

Abstract. Indonesia’s population has risen in the last 35 years, as consequences this has led an increase in the volume of domestic waste. Waste is complex problems that related many stakeholders, however, the waste problem can be resolved by integrated waste management.  In the upstream level, waste is managed by Reduce, Reuse, Recycle activity. In the downstream level, waste is converting into energy. In order to accelerate the waste reduction in several urban cities by thermal technology, Presidential Regulation was issued in 2016, but there was a lawsuit against the regulation.   The final goal of this research is to select waste to energy technology from five alternatives, sanitary landfill, anaerobic digestion, gasification, incineration, pyrolysis. The method in this research is Analytical Hierarchy Process (AHP) consisted of Pairwise Comparison and Simple Multi-Attribute Rating Technique (SMART) to get priority of waste to energy technology in Indonesia. The expert has selected their priority in numerical scale then synthesis using the verbal weighting.  In criteria level, Technical criteria have the highest value, followed by Environmental.  In the sub-criteria level, financial feasibility has the highest value, followed by waste volume reduction. The priority of selected technology is 1) incineration; 2) Gasification; 3) Anaerobic digestion; 4) Sanitary landfill; 5) Pyrolysis.  Keywords : waste to energy, AHP, technical criteria, financial feasibility, inceneration.
Enhancing Conveyor Belt Performance: Evaluating the Impact of In-creased Capacity Using Belt Analyst Software Golwa, Gian Villany; Murdiyati, Sari; Satria, Muhammad Kevin
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 6, No 1 (2024)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v6i1.19449

Abstract

This study investigates the effects of increasing conveyor belt capacity from 148.5 tons per hour (t/h) to 180 t/h on the overall system performance, employing both manual measurements and simulations using Belt Analyst software. The research aims to evaluate critical parameters such as effective pulling force, motor power requirements, structural load, and belt deflection, which are essential for determining the feasibility and impact of such an upgrade. The analysis reveals that with the capacity increase, the effective pulling force required rises to 14,072 N, while the motor power usage escalates to 15 kW. Concurrently, the structural load experiences a significant increase from 46.144 kg/m to 56.238 kg/m, and belt deflection intensifies from 22 mm to 27 mm. These findings suggest that increasing the conveyor belt capacity to 180 t/h, may lead to increased stress on the structure and belt, which could potentially affect the lifespan and performance of the conveyor system. Furthermore, while the conveyor system's performance enhances at the higher capacity, it also places additional stress on the system's components. The study further examines the implications of these changes, emphasizing the potential risks to the conveyor belt’s structural integrity and the possible reduction in its lifespan due to the increased mechanical stress. It is highlighted that careful consideration and precise engineering adjustments are necessary when planning capacity enhancements to avoid adverse effects on the system's longevity and reliability.
Co-Authors Golwa, Gian Villany Satria, Muhammad Kevin Yos Sunitiyoso