1. Wastewater to R3 - resource recovery, recycling, and reuse efficiency in urban wastewater treatment plants 2. Energy and resources recovery from wastewater treatment systems 3. Water reclamation, recycle, and reuse 4. Advanced biological water reclamation and reuse technologies for recirculating aquaculture system 5. Hybrid forward/reverse osmosis (HFRO): An approach for optimized operation and sustainable resource recovery 7. Energy self-sufficiency in wastewater treatment plants: Perspectives, challenges, and opportunities 8. Cellulosic materials recovery from municipal wastewater: From treatment plants to the market 9. Assessing algae-based wastewater treatment-a life cycle assessment approach 10. Methanotrophic bacterial biorefineries: resource recovery and GHG mitigation through the production of bacterial biopolymers 11. Microbial electrochemical technologies for wastewater treatment: insight into theory and reality 12. Waste(water) to feed protein: effluent characteristics, protein recovery, and single-cell protein production from food industry waste streams 13. Acids (VFAs) and bioplastic (PHA) recovery 14. Algal treatment of wastewater for resources recovery 15. Polyhydroxyalkanoate production from food industry residual streams using mixed microbial cultures 16. Removal of nitrogen and phosphorus from wastewater through the moving bed biofilm reactor 17. Wastewater to biogas recovery 18. Wastewater to bioactive products: recovery of polysaccharides in activated sludge from sulfate-laden wastewater 19. Circular city concept for future biorefineries 20. Sludge treatment: an approach toward environmental remediation 21. Values added products recovery from sludge 22. Biogas recovery from sludge 23. Cellulose and extracellular polymer recovery from sludge 24. Cambi Thermal Hydrolysis Process (CambiTHP) for sewage sludge treatment 25. Reutilization of sludge as fertilizer 26. Valorizing sludge: a biorefinery perspective prospecting for sustainable development