1. Introduction 2. Sewage sludge from wastewater in a circular economy prospect 3. Polyhydroxyalkanoates production from wastewater organic carbon 4. Production of volatile fatty acids from sewage sludge fermentation 5. Zeolite for the recovery of nutrients from treated wastewater 6. Selecting bulking agent for Sewage sludge composting 7. Advances in technologies for sewage sludge management 8. Energy and valuable product recovery through anaerobic digestion processes 9. Life cycle assessment as a tool for resource recovery facilities in wastewater sector 10. Water reuse in the frame of circular economy: bottleneck, barriers and technological issues 11. Drivers and barriers to wider uptake of water smart solutions 12. Advances in environmental bioprocess technology for an effective transition to a green circular economy 13. Advanced technologies for a smart and integrated control of odour emissions from wastewater treatment plant 14. Microbial biotechnology diverts wastewater treatment to circular economy 15. Biological nutrients recovery from wastewater for circular economy 16. Towards circular economy implementation: the role of stakeholders engagement