Large textile industries are deploying Industry 4.0 Technologies (I4.0T) aiming to develop a micro-level circular economy (CECP), considering cleaner production practices as a strategic tool. However, due to the environmental impact generated by the textile industry, it has not yet achieved Strong Sustainability (SS), denoting an important path to be pursued by managers and shareholders in view of meeting the 2030 agenda. With this, the objective of this study is to evaluate whether the adoption of I4.0T promotes CECP-driving SS actions in large textile industries located in Brazil. A survey was the research method adopted, and for data analysis, structural equation modeling was used to test the hypotheses and Pearson correlation between variables. It was concluded that the adoption of I4.0T promotes CECP. However, they neglect SS actions. Facilitators for CECP practices were big data, augmented reality, and autonomous robots. In terms of SS, I4.0T has a low impact on increasing resource consumption efficiency, reusing waste as input in other processes, and increasing access to commodities. This research contributes to the linking I4.0T, CECP, and SS theory. Moreover, with the dissemination of knowledge to managers about the I4.0T that generates the CECP, it is possible to develop sustainable strategies in operations. However, to move in this direction, it is essential that there is a collective effort of the government, companies, and society, starting by raising awareness about the importance of SS in the textile sector.

The aviation industry has a significant impact on the environment, accounting for 13% of global fossil fuel consumption and 2% of annual CO₂ emissions. One of the factors that increase this consumption is engine degradation due to the accumulation of dirt on compressor blades. To mitigate this effect and restore efficiency, compressor washing is essential, but it requires high water consumption. This study analyzes the operational, economic, and environmental benefits of optimizing this process, based on the Blue Economy. Fuel efficiency was assessed using the Fuel/RTM indicator, financial viability using ROI, and environmental impacts using the MIF index. The results indicate a 1.8% gain in fuel efficiency, annual savings of $179,000, a 6.9% reduction in environmental impact, and a 50% drop in water use. The findings demonstrate that sustainable maintenance practices generate economic and environmental gains, contributing to the conservation of water resources in aviation.