Qilin Wang is Professor in Environmental Engineering at University of Technology Sydney . His research focuses on the development of innovative technologies to revolutionize the science and practice of urban water management. He has developed a few award-winning technologies to maximize energy recovery from wastewater/waste, to achieve carbon-neutral wastewater treatment, to reduce waste production, to improve wastewater treatment performance through innovative nitrogen removal processes, to mitigate greenhouse gas (N2O) emission, to reduce the spread of antibiotic resistance genes, and to increase the capacity of anaerobic digesters, among others. Some of these technologies have been demonstrated at pilot scale and are being demonstrated at full-scale plants. Jing AI is assistant research fellow at the National Engineering Research Center of Industrial Wastewater Detoxification and Resource Recovery, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences. Her research focuses on the development of innovative technologies to treat and recycle organic waste-solids and their relevant ecological effects on the environment. She has made a series of innovative achievements in developing conditioning agents and techniques for efficient separation of excessed sludge bound water, coupling technologies of deep dewatering and resource utilization for waste sludges, and evaluating transformation mechanisms of organic matter and relevant biological effects in sludge (water) thermochemical treatment.Jing Sun is a professor at the College of Environmental Science and Engineering, Tongji University, China. She received her B.Sc. from Hohai University, China, and Ph.D. from the University of Queensland, Australia. Her research interests include understanding and controlling in-sewer processes for odor and corrosion mitigation, innovative biological treatment technologies for energy and resource recovery from wastewater and sludge, mathematical modeling of biological wastewater treatment processes, and emerging containments in wastewater, such as microplastics. She has published more than 70 peer-reviewed journal articles with 56 in the JCR Q1 journal and secured over 10 competitive research grants from the National Natural Science Foundation of China etc. She was awarded the Young Australia China Alumni of the Year Award in 2021. She served as a management committee member of the IWA Specialist Group on Modelling and Integrated Assessment Management and is also an editorial board member for 4 SCI journals.

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• 1. Introductions - Significance of the topic and its relevant in today's world2. Introduction to the production, properties and disposal of surplus sludge3. Bioenergy production in sludge anaerobic digestion process4. Desulfurization technologies for biogas produced of sludge anaerobic digestion process5. Pyrolysis of sludge for bioenergy production6. Greenhouse gas emission and control in sludge treatment processes based on LCA7. Outlook-the potential limitations or challenges of bioenergy production from sludge8. The policy and regulation related to sludge management and energy recovery References Appendix table