Electronic waste (e-waste) has become one of the fastest-growing waste streams in the world. However, only 17.4% of it can be collected and recycled in 2019. This study aims to formulate strategies to improve the supply chain of e-waste management in Indonesia. Methods used to develop strategies in this study are the Decision-Making Trial and Evaluation Laboratory (DEMATEL), the Analytical Network Process (ANP), Strength–Weaknesses–Opportunities–Threats (SWOT), and the Quantitative Strategic Planning Matrix (QSPM). The results show that infrastructure criteria have the largest weight, that is 0.267, followed by a social environment with 0.261, regulation with 0.244, stakeholder with 0.122, and economy with 0.054. The top priority of the selected strategies is to improve public education (ST1) and provide socialization of regulations and sanctions to the public (ST2).
This study aims to make a catalyst from biomass waste in the form of coconut coir and apply it to the transesterification process of cocodiesel. The raw material for cocodiesel in this study was a coconut-based cooking oil that was also a waste and could pollute the environment. The research method includes cooking oil analysis, the catalyst’s preparation, and the catalyst’s characterization with Brunauer-Emmet-Teller (BET), X-ray fluorescence (XRF), X-ray diffraction (XRD), and Scanning electron microscope (SEM) analysis. The next step was the application of the catalyst in the transesterification reaction. The results showed interesting information, in which the addition of the calcination process increased the catalyst’s surface area and crystallinity ratio. Applying a catalyst in converting used cooking oil to cocodiesel gave 48.5% and 51% yields with densities close to the biodiesel standard.
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