The paper analyses the environmental impact of three forms of waste PET bottle management, i.e. through recycling, energy recovery and as a result of its disposal. The analysis was carried out using the Life Cycle Assessment (LCA) technique enabling comprehensive assessment covering both direct and indirect environmental impacts. The research carried out included changes resulting from technological progress and the development of environmental protection technologies, which may have a significant impact on the obtained results. An attempt has been made to take into account these changes and assess the environmental benefits of various forms of PET bottle management. The study confirmed the results of research carried out by Chinese and British scientists indicating that the most environmentally friendly form of waste PET bottle management is recycling (1.38 mPt). Energy recovery (2.73 mPt) shows a higher environmental burden, while disposal is the most unfavourable form of waste PET bottles management (7.31 mPt). As a result, despite differences in environmental technologies used a decade ago and today, as well as legal differences in force in the compared regions of the world, the main conclusions of the study remain valid. For this reason, it is important adopt environmentally friendly waste PET bottles management and to include them in the global material balance for the implementation of circular economy solutions that correspond directly with the Sustainable Development Goals of the 2030 Agenda of Sustainable Development.

The principles of Findability, Accessibility, Interoperability, and Reusability (FAIR) have been put forward to guide optimal sharing of data. The potential for industrial and social innovation is vast. Domain-specific metadata standards are crucial in this context, but are widely missing in the energy sector. This report provides a collaborative response from the low carbon energy research community for addressing the necessity of advancing FAIR metadata standards. We review and test existing metadata practices in the domain based on a series of community workshops. We reflect the perspectives of energy data stakeholders. The outcome is reported in terms of challenges and elicits recommendations for advancing FAIR metadata standards in the energy domain across a broad spectrum of stakeholders.

Coal mining activity contributes to energy security and employment occupation, but is associated with environmental deterioration. Coal combustion leads to GHG emissions, while coal mining results in the generation of saline effluents. These effluents are discharged in inland surface waters, applying significant pressure on their quality, with a negative impact on aquatic life and the economy of a region. This study includes water samples that were analyzed in order to investigate the organic compounds, heavy metals, and other physicochemical parameters. Biological monitoring was done according to the Water Framework Directive methodology. The results from an aquatic area in Southern Poland, which indirectly receives coal mine effluents, indicate elevated salinity with excessive chlorides, sulfates, and sodium ions. The water quality of another non-polluted aquatic area was also assessed to examine the impact of indirect coal mine wastewater discharge on this area. The high salinity levels hinder the use of river water for drinking, agricultural, or industrial purposes. The results obtained show high pressure on the ecological status of streams and rivers that receive mine effluents, and on the density and diversity of aquatic invertebrates. This pressure is clearly visible in the structure of benthic communities and in invertebrate diversity. It also contributes to the appearance of invasive species and increasing water salinity. Limiting discharges of mine water transporting large loads of saline substances would reduce the negative impact on the quality of river waters and biological life.

This paper presents comparative life cycle assessment (LCA) for biomass use in the torrefaction process. The analysis took into account the climate change category for a time horizon of 100 years. It considered subsequent stages of biomass life cycle, i.e., the stage of biomass preparation for the torrefaction process, starting from its transport until its processing (thermal treatment) on torrefaction installation. Palm kernel shell (PKS) and Polish woodchips were selected as the biomass to be analyzed. The functional unit was selected to be 1 Mg of torrefied biomass. The torrefaction process was carried out in an installation at the Institute for Chemical Processing of Coal (ICPC). The analysis showed that among the considered life stages of PKS and woodchips, the biggest environmental load indicates the torrefaction stage. The estimated environmental effect is several orders of magnitude larger in comparison with other stages of biomass life.

The paper presents the results of an LCA analysis of the “Wetland+^®” technology compared to conventional wastewater treatment technology. Wastewater contaminated with pesticide production residues from lindane was treated. The analysis is based on data from a full-scale Wetland+^® installation located in Hajek, the Czech Republic. Conventional wastewater treatment technology was selected as a comparator. For the comparative system, data for the LCA came from design calculations assuming the location of such a system in the same place and function as the Wetland+^® technology implemented. The LCA analysis was carried out using system boundaries covering the stages of construction and operation of the systems. The results indicate that with the Wetland+^® technology, a system’s overall environment burdens are >11 times less than that of conventional wastewater treatment technology.