Biodiversity restoration and conservation of inland water ecosystems for environmental and human well-being through the advance of treatment processes (chemical, physical, biological and their combination) to promote ecosystem recovery and conservation and to develop assessment strategies. Diatoms will be used to model ecosystem conservation and restoration since their communities show high levels of biodiversity. The diatoms will provide an expeditious method to compare different recovery strategies and water treatment processes, allowing to address timescale and key conservation/restoration questions. The full environmental, economic, and social viability of the upgraded and innovative treatment technologies will be assessed using Life Cycle Analysis and SWOT assessments. Based on this knowledge, scale-up studies in geographically different sites (Portugal and Spain) to ascertain the technical and economic feasibility at a larger scale will be performed and recommended action guidelines will be issued. Furthermore, BioReset also envisages the creation of a representative space-time picture of the presence of emerging contaminats in inland waters and its correlation to effects on diatom communities. For this, powerful analytical techniques, such as gas- and liquid chromatography, will be used. Besides these methods, and to obtain real-time information, miniaturized analytical platforms that can perform fast and on-site monitoring will also be employed.