Dr Liu is a Chair Professor of Environmental Engineering in College of Environmental Science and Engineering, Nankai University, China. Prior to that, he had been a tenured full professor in School of Civil and Environmental Engineering, Nanyang Technological University of Singapore for 25 years. His research primarily focuses on novel and innovative technologies for municipal wastewater reclamation and biosolids management with specific interests in energy/resource recovery, energy and carbon neutrality towards the urban and water sustainability. Dr Liu has published more than 380 journal papers in in the mainstream environmental biotechnology and engineering journals, with the total citation of more than 36000 and h-index of 96 by Google Scholar. He has 8 books published by Wiley, CRC Press, IWA Publishing etc. In recognition of his contributions to research and administration, Dr Liu was awarded The Singapore Public Administration Medal (Bronze) in 2014, The Singapore Minister for National Development R&D Merit Award in 2013 and Singapore National Technology Award in 2003.Dr Xiaoyuan Zhang is an Associate Professor in the College of Environmental Science and Engineering, Nankai University of China. Her research interest is more in the fields of energy and resource recovery from wastewater and biosolids. So far, Dr Zhang has published more than 50 papers in mainstream environmental journals, such as Water Res., Bioresource Technology; Chem. Eng. J., J. Hazard. Mater. etc, three of which were selected as ESI highly cited papers. She currently serves as the youth editorial board member of "China Water Supply and Drainage", “Rev. Environ. Contam. T.” and the guest editor of Front. Microbio., Front. Nanotechnol., Membranes.Dr Meng Zhang is a Professor of environmental engineering at Zhejiang University, China. He earned his bachelor’s and doctoral degrees in environmental engineering from Zhejiang University. He worked as a postdoc in Zhejiang University (2016-2018), and a Research Fellow at Nanyang Technological University of Singapore (2018-2021). His research interests focus on wastewater treatment, environmental biotechnology and microbiology, and nutrient removal and recovery from wastewater. Dr Zhang has published more than 100 journal papers in the mainstream environmental science and engineering journals (Google Scholar Citations about 3800; H-index 39, as of May 2024). As co-editor, he also publishes an IWA book. Currently, he is the editorial board member of Results in Engineering, China Water & Wastewater, and the member of IWA-YWP China.Prof Lu’s research primarily focuses on novel and innovative technologies for drinking water safety assurance and municipal wastewater reclamation with specific interests in technologies of advanced oxidation technology, new pollution control, algae organic matter extraction and utilization and wastewater, sludge and biomass resource utilization towards the urban and water sustainability. Dr Lu has published more than 80 journal papers in the mainstream environmental science and engineering journals. In recognition of his contributions to research and administration, she was awarded Tianjin Science and Technology Progress Award in 2015，National Teaching Achievement Award and Teaching Master Award in 2023.

• 1. Municipal wastewater treatment and biosolids management: Current status, challenges and directions forward2. Direct energy recovery from municipal wastewater3. Ammonium recovery from municipal wastewater and waste sludge4. Phosphorus recovery from wastewater and waste sludge5. Biopolymers recovery from waste sludge6. Enhanced fermentation and anaerobic digestion of waste sludge for energy and resource recovery7. Co-digestion of waste sludge and food waste towards energy self-sufficient municipal wastewater treatment8. Thermal-chemical treatment of biosolids for enhanced energy and resource recovery9. Microbial lipid production from biosolids10. Electric energy production from biosolids in microbial fuel cells11. Integrated engineering approaches for biosolids management towards zero-solid disposal12. On circular economy-driven wastewater and biosolids valorization: What is the next?

Dr Liu is a Chair Professor of Environmental Engineering in College of Environmental Science and Engineering, Nankai University, China. Prior to that, he had been a tenured full professor in School of Civil and Environmental Engineering, Nanyang Technological University of Singapore for 25 years. His research primarily focuses on novel and innovative technologies for municipal wastewater reclamation and biosolids management with specific interests in energy/resource recovery, energy and carbon neutrality towards the urban and water sustainability. Dr Liu has published more than 380 journal papers in in the mainstream environmental biotechnology and engineering journals, with the total citation of more than 36000 and h-index of 96 by Google Scholar. He has 8 books published by Wiley, CRC Press, IWA Publishing etc. In recognition of his contributions to research and administration, Dr Liu was awarded The Singapore Public Administration Medal (Bronze) in 2014, The Singapore Minister for National Development R&D Merit Award in 2013 and Singapore National Technology Award in 2003.Dr Xiaoyuan Zhang is an Associate Professor in the College of Environmental Science and Engineering, Nankai University of China. Her research interest is more in the fields of energy and resource recovery from wastewater and biosolids. So far, Dr Zhang has published more than 50 papers in mainstream environmental journals, such as Water Res., Bioresource Technology; Chem. Eng. J., J. Hazard. Mater. etc, three of which were selected as ESI highly cited papers. She currently serves as the youth editorial board member of "China Water Supply and Drainage", “Rev. Environ. Contam. T.” and the guest editor of Front. Microbio., Front. Nanotechnol., Membranes.Dr Meng Zhang is a Professor of environmental engineering at Zhejiang University, China. He earned his bachelor’s and doctoral degrees in environmental engineering from Zhejiang University. He worked as a postdoc in Zhejiang University (2016-2018), and a Research Fellow at Nanyang Technological University of Singapore (2018-2021). His research interests focus on wastewater treatment, environmental biotechnology and microbiology, and nutrient removal and recovery from wastewater. Dr Zhang has published more than 100 journal papers in the mainstream environmental science and engineering journals (Google Scholar Citations about 3800; H-index 39, as of May 2024). As co-editor, he also publishes an IWA book. Currently, he is the editorial board member of Results in Engineering, China Water & Wastewater, and the member of IWA-YWP China.Prof Lu’s research primarily focuses on novel and innovative technologies for drinking water safety assurance and municipal wastewater reclamation with specific interests in technologies of advanced oxidation technology, new pollution control, algae organic matter extraction and utilization and wastewater, sludge and biomass resource utilization towards the urban and water sustainability. Dr Lu has published more than 80 journal papers in the mainstream environmental science and engineering journals. In recognition of his contributions to research and administration, she was awarded Tianjin Science and Technology Progress Award in 2015，National Teaching Achievement Award and Teaching Master Award in 2023.

• 1. Municipal wastewater treatment and biosolids management: Current status, challenges and directions forward2. Direct energy recovery from municipal wastewater3. Ammonium recovery from municipal wastewater and waste sludge4. Phosphorus recovery from wastewater and waste sludge5. Biopolymers recovery from waste sludge6. Enhanced fermentation and anaerobic digestion of waste sludge for energy and resource recovery7. Co-digestion of waste sludge and food waste towards energy self-sufficient municipal wastewater treatment8. Thermal-chemical treatment of biosolids for enhanced energy and resource recovery9. Microbial lipid production from biosolids10. Electric energy production from biosolids in microbial fuel cells11. Integrated engineering approaches for biosolids management towards zero-solid disposal12. On circular economy-driven wastewater and biosolids valorization: What is the next?