Yafan Cai is a directly employed researcher at the Biology and Joint Research Center of the School of Chemical Engineering, Zhengzhou University. He is a master’s tutor at Zhengzhou University. He obtained a doctorate in biomass engineering from the College of Agricultural Sciences and Biotechnology of China Agricultural University in 2019 and completed the postdoctoral course in the Biotransformation Department of the German Biomass Engineering Center (DBFZ) from 2019 to 2021. He is a reviewer for academic journals, such as Water Research, Bioresource Technology, Waste Management, etc., and is also a Guest Editor for Energies. He recently chaired the project funded by the National Natural Science Foundation of China (2023–2025) on the “bioaugmentation of mutually beneficial complex bacteria and the mechanism analysis of ammonia inhibition relief based on ‘ammonia inhibition steady state’”, Maotai-flavor liquor wastewater treatment process development project (2023–2025), Beijing Technology and Business University Key Laboratory Open Project about Liquor wastewater treatment process development project based on simultaneous denitrification (January 2023–December 2023). His research directions include organic waste resource utilization (bio-fermented protein feed direction), organic waste energy utilization (bio-natural gas engineering direction), and organic waste fertilization (bio-organic fertilizer direction).