1. Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
2. Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
3. Department of Mechanical and Manufacturing Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
4. TVNI Technical Director for Asia and Oceania, Brisbane, Australia
5. Department of Environmental Engineering, Faculty of Civil Engineering, Universiti Teknologi Malaysia (UTM), Johor, Malaysia