Abu Zahrim Yaser, PhD, is Associate Professor in Waste Processing Technology at the Faculty of Engineering, Universiti Malaysia Sabah, Malaysia. He obtained his PhD from Swansea University, Wales. His inventions on composting system have been adopted by the Tongod and Nabawan districts in Sabah, Malaysia. He is a visiting scientist at the University of Hull, England, and a member of the Institutions of Chemical Engineers (United Kingdom), Board of Engineers (Malaysia), and MyBIOGAS. Siew-Xian Chin, PhD, is currently a Senior Lecturer at the Universiti Kebangsaan Malaysia (UKM). She received her PhD in Materials Science at UKM, Malaysia, in 2015. Her research interests include the development of new materials for wastewater treatment, such as membrane, bead, aerogel, etc. She has utilized agricultural by-products, including cellulose and chitosan, to produce adsorbent materials with high adsorption capacity by introducing various chemical modifications. She was a Visiting Doctoral Researcher at the Chinese A
