1. Faculty of Fire Fighting and Rescue, The University of Fire Prevention and Fighting, 243 Khuat Duy Tien, Thanh Xuan, Hanoi, Vietnam
2. Graduate School of Environmental Engineering, The University of Kitakyushu, Kitakyushu 808-0135, Japan
3. Faculty of Environmental Engineering, The University of Kitakyushu, Kitakyushu 808-0135, Japan