AJIE (Asian Journal of Innovation and Entrepreneurship)

Analisis Studi Kelayakan Rencana Pembangunan Tempat Pengolahan Sampah Terpadu (TPST) Kabupaten Kapuas Hulu, Provinsi Kalimantan Barat

Khoiria A'fia — 2026-04-19

Population growth and increased activity have a direct impact on the increase in the amount and composition of waste produced by a region, requiring an effective and efficient waste management system. The development of an Integrated Waste Management Facility (TPST) is one alternative that can be implemented to address this issue. However, the construction of an ISWMP requires a significant investment, so it needs to be based on a comprehensive feasibility analysis in terms of environmental, technical, and economic aspects so that the facility can operate sustainably. This study aims to analyze this feasibility so that the ISWMP in Kapuas Hulu Regency can be built and operated until 2045. The methods used are population projection analysis until 2045, waste generation and composition projection analysis, assessment of alternative waste management technologies using a scoring method, and economic and financial feasibility analysis including Net Present Value (NPV), Internal Rate of Return (IRR), Benefit Cost Ratio (BCR), and Pay Back Period (PP). The analysis results show that the population of Kapuas Hulu Regency is projected to increase to 310,866 people by 2045, with waste generation reaching 57.95 tons/day. The composition of waste is dominated by food waste and plastic waste. Based on the technology scoring results, the recommended treatment system is a combination of BSF (Black Soldier Fly) maggots and Open Windrow composting for organic waste, Material Recovery Facility (MRF) for inorganic waste, and incineration for residual waste treatment. The economic and financial feasibility analysis shows that the TPST plan is feasible to implement, as indicated by an NPV > 0, an IRR of 112% exceeding the discount rate, a BCR > 1, and a PP shorter than the economic life of the plan. Based on these research results, the planning for the construction of the Kapuas Hulu Regency TPST is feasible from an economic and financial perspective and is therefore recommended as a long-term waste management solution.

Pemetaan Infrastruktur Pengelolaan Sampah Berbasis Masyarakat (PSBM) Menggunakan Sistem Informasi Geografis (SIG) dengan Wilayah Studi di Kabupaten Sleman, Yogyakarta

Muhammad Rifqi Satria — 2026-04-24

The population growth in Sleman Regency has led to an increase in waste generation, necessitating an effective and participatory management system. This study aims to map the distribution of Community-Based Waste Management (CBWM) infrastructure, such as TPS3R, waste banks, and "waste donation" programs, and to evaluate their distribution and effectiveness using Geographic Information Systems (GIS). A descriptive quantitative method with a spatial approach was employed using QGIS software. Data analysis utilized overlay, buffering, and nearest neighbor analysis to evaluate the spatial service coverage. The results indicate a significant surge in the number of facilities, rising from 234 units in 2022 to 508 units in 2025; however, the distribution remains uneven. Population density significantly influences this distribution, where Ngaglik District, with the highest density (202 people/ha), still possesses a sub-optimal facility ratio compared to other regions. This study recommends spatial evidence-based priority zoning, including the establishment of a 500-meter service buffer in densely populated settlements and the revitalization of inactive units. These mapping results are expected to serve as a framework for more measurable and sustainable policy-making and evaluation of waste management in Sleman Regency

Pengembangan Rear Diffuser City Car sebagai Komponen Modifikasi Berbasiskan Metode Reverse Engineering yang Didukung Teknologi 3D Scanning dan 3D Printing

Dadi Satrio Wibowo — 2026-04-19

The addition of a rear diffuser to a city car is a modification concept that lends it a distinctive character. Developing this component to provide further added value remains a challenge. In this study, the modification process for the rear diffuser of a city car was carried out using a reverse engineering approach supported by 3D scanning, re-drawing, modification, and prototyping. The 3D scanning process was performed using a 3D scanner with a scanning volume ranging from 0,2 m 0,2 m 0,2 m to 2 m 2 m 2 m and an operational range 0,45 m to 1,6 m. This process was optimized through object colorization. CAD models were re-drawn and evaluated using a combination of CAD and CAE software and their features. The results of this study indicated that reverse engineering methods supported by 3D scanning and 3D printing technologies could results in a variety of rear-diffuser designs for city cars, with airflow analysis showing that these designs do not compromise vehicle performance.