1. Introduction to Wastewater Valorization: Turning Effluents into Valuable Resources 2. Sustainable Resource Recovery of Biomass Valorization 3. Lignin-containing Residue Valorization: Innovative Approaches 4. Electrokinetic and Electrochemical Processes for Wastewater Valorization (Example of pilot project generating electricity from WWTPs) 5. Resource Recovery by Microbial Fuel Cells and Bioelectrochemical Systems 6. Turning Waste Biomass into Bioproducts by Hydrothermal Liquefaction 7. The Fenton Process and Its Application in Wastewater Valorization.

8. Wastewater Treatment Technologies as Catalysts of the Iron Wastes 9. Oily Sludge Valorization: Methods and Industrial Applications (Case study of refineries to treat and recover) 10. Environmental Remediation and Resource Recovery utilizing Fly Ash 11. Use of Mine Tailings for Environmental and Economic Valorization 12. Algal Biorefinery Systems For Municipal And Industrial Wastewater Treatment (Case study of implementation) 13. Spent Hydroponic Solution Treatment and Biomass Production by Microalgae 14. Reverse Osmosis Reject Water Valorization: Sustainable Approaches 15.

Peri-urban Wastewater Valorization and Agriculture: Microbial Strategies 16. Recovery of Transition Metal Ions from Battery Manufacturing Wastewater (Case study: Recovery of cobalt and lithium) 17. Valorization in Wastewater: Future Trends and Challenges for Circular Economies.