Xiao Feng is an associate professor at research center for eco-environmental sciences, Chinese Academy Sciences, Beijing. He earned his BSc and MSc degrees from Xian Jiaotong University, Xian, China. In 2009, he obtained his PhD in environmental engineering from the University of Hong Kong, Hong Kong. After graduation, he joined RCEES as an assistant professor (2010-2013). From 2014, he has been appointed as an associate professor in this research institute. His scientific area is mainly focused on water and environmental issues. His scientific interests include particle transport in natural waters; coagulation and flocculation in water and wastewater treatment; membrane application and advanced oxidation processes (AOP) in water and wastewater treatment.Xiao has published more than 40 SCI papers in peer-reviewed journals and hasfive Chinese patents related to water and wastewater treatment. As a principle investigator, his research funding is over six million CNY both from government and companies. He also is selected as a member of IWA Young Water Professionals (IWA-YWP) in China.

Azzaya Tumendelger received her Ph.D degree from Tokyo Institute of Technology, Japan,in 2014. During her doctoral fellow period, she revealed production and consumption mechanisms of nitrous oxide (N2O), a potent greenhouse gas, emitted during wastewater treatment system using stable isotopic analysis.Because of her expertise in studying emission process of greenhouse gas, Dr. Tumendelger was invited by Environmental Physics group at the University of Koblenz-Landau, Germany, in 2015-2016.At this time, her work concentrated on elucidation of CH4 and N2O dynamics in either WWTPs with different operations or surrounding streams located in south Germany. She estimated the emission factors of both CH4 and N2O and this was contributed to estimation of total GHGs emission from that regional area.Except doctoral topic, her research focus is on the treatment of contaminated water by heavy metals caused by mining activities, hydrometallurgical processing of natural ore containing precious and rare earth elements.She received several grants from local and international agencies in the past.