Zhao Youcai, is currently a professor of environmental engineering at School of Environmental Science and Engineering, Tongji University. He got bachelor degree from Sichuan University (1984) and Ph.D. from Institute of Chemical Metallurgy (now Institute of Process Engineering), Chinese Academy of Sciences, Beijing (1989). After finished Post-doctoral research work at Fudan University, Shanghai, he joined in Tongji University in 1991. Meanwhile, he had ever worked at Aristotle University, Greece, National University of Singapore, Tulane University, USA, and Paul Scherrer Institute, Switzerland, for 4 years as research fellow or visiting professor. He had authored or co-authored 200 publications published in peer-reviewed internationally recognized journals, 480 publications in China journals, authored 9 English books (at Elsevier and Springer) and authored or co-authored 98 Chinese books (as an author or Editor-in-chief), 4 textbooks for undergraduate, graduate and PhD students with a fourth edition of undergraduate textbook (in Chinese). Currently, his research interests include treatment and recycling of municipal and rural solid waste, construction and demolition waste, hazardous waste, industrial waste, electric and electronic waste, and sewage sludge, and polluted soil.