1. Universiti Malaysia Perlis UniMAP; School of Environmental Engineering; Kompleks Pusat Pengajian Jejawi 3 02600 Arau, Perlis Malaysia
2. Universiti Malaysia Perlis; Centre of Excellence for Biomass Utilisation; 02600 Arau Malaysia
3. Universiti Malaysia Pahang; Faculty of Chemical & Natural Resources Engineering; Lebuhraya Tun Razak 26300 Gambang, Kuantan, Pahang Malaysia