Hai-Hsuan (Henry) Cheng | National Cheng Kung University (NCKU), Taiwan, China
Dr. Hai-Hsuan (Henry) Cheng is a dedicated researcher from National Cheng Kung University (NCKU), Taiwan, with a strong focus on environmental biotechnology and biological wastewater treatment. He has served as a Visiting Student Researcher at Stanford University and an Honorary Associate at the University of Wisconsin–Madison. Currently, he works as a Postdoctoral Researcher with Prof. Liang-Ming Whang at NCKU. His research covers anaerobic fermentation/digestion and nitrogen removal for the treatment of organic wastes, municipal and industrial wastewaters, and drinking water sources. Dr. Cheng specializes in the development and operation of innovative bioreactors, including anaerobic fluidized membrane bioreactors (AFMBR) and moving bed bioreactors (MBBR), aiming to enhance treatment efficiency, resource recovery, and operational resilience. He also bridges experimental research with computational tools, applying metabolic flux analysis and process simulation to provide insights into microbial processes. To date, Dr. Cheng has authored 25 SCI journal articles, 18 of which he was the first author, including two review papers on resource recovery from cellulosic wastes and swine wastewaters via biotechnologies.
Speech title "Anaerobic Fluidized Membrane Bioreactor (AFMBR) for High-Strength Wastewaters: Lessons Learned and Future Advances"
Abstract-Anaerobic fluidized membrane bioreactor (AFMBR) has been investigated as an innovative process for municipal wastewater treatment since its development in 2011. Beyond this, the intrinsic advantages of AFMBR, including small footprint, energy recovery, rapid startup, and low membrane fouling frequency, make it a promising option for high-strength wastewaters. From our experience, COD removal consistently exceeded 90% under stable operation when applied to diverse high-strength wastewaters, including cold-rolling wastewater (0.52 kg-COD/m³/d), dimethyl sulfoxide (DMSO)-containing wastewater (1.87 kg-COD/m³/d), N-methyl-pyrrolidone (NMP)-containing wastewater (0.38 kg-COD/m³/d), and swine wastewater (7.44 kg-COD/m³/d). Among operating parameters, volatile suspended solids (VSS) showed the strongest correlation with transmembrane pressure (TMP), highlighting sludge control as a key factor in mitigating fouling. Comparative evaluations indicated that adding granular activated carbon (GAC) was the most effective strategy to alleviate fouling, outperforming gas sparging and acidogenic pretreatment. Furthermore, the addition of GAC or activated carbon-fused polyethylene carriers enhanced methane yield, likely through stimulation of direct interspecies electron transfer (DIET). Temperature and organic loading rate were also found to critically affect AFMBR performance. Batch experiments revealed that more than 60% of COD removal and methane production was attributable to biofilm attached to GAC, rather than suspended sludge, emphasizing the dominant role of attached growth. Overall, AFMBR demonstrates strong potential for the treatment of high-strength wastewaters. Future optimization and scale-up will benefit from targeted research into microbial mechanisms, operational strategies, and integrated modeling approaches.
Wang Qiang | Beijing Normal University, China
Dr. Wang is a postdoctoral fellow at Beijing Normal University after she got PhD of Education in University of Science Malaysia. As she has strong scientific research skills, she is appointed as a distinguished professor by Krirk University and a visiting professor by Jeonju University. She has published several high-quality articles on education in international journals. Based on rich work experience and strong academic background, she has become the peer reviewer for many journals indexed by SCOPUS, ERA, Harvard Library E-Journals. She has been committed to promoting the development of education in the era of artificial intelligence and facilitating the establishment of partnerships among global education institutions.
Speech title "The Current Situation and Development Strategies of China's River Chief System"
Abstract-The river chief system is a unique river management model in China It greatly reversed the long-term trend of ecological environment deterioration and provided Chinese cases and practices of ecological environment governance As an important ecological security barrier in the upper reaches of the Yangtze River and the most important water conservation area in the Chengdu Plain, Dujiangyan City has played an extremely important role in China's food security, economic development and social stability. Protect the water environment, manage water resources, and activate the water economy. In this study, one-on-one interviews were conducted with relevant personnel of Sichuan Dujiangyan Water Conservancy Development Center. The interview mainly aims to understand the implementation of the "river chief system" collaborative governance, the effectiveness of the evaluation system, the current operation status of the river chief office, the degree of digital technology application, the advantages and disadvantages of the existing river chief system, and suggestions for optimizing the river chief system work in the future. This study proposes several suggestions for the development of the river chief system, including increasing the proportion of voluntary policy tools, adopting different coordination strategies to promote work, highlighting the driving role of technological innovation and industrial upgrading, establishing effective incentive policies, increasing publicity efforts, and implementing digital river management.