1. Postdoctoral Fellow, Disaster Prevention and Water Environment Research Center, National Chiao Tung Univ., Hsinchu, Taiwan.
2. Professor, Institute of Environmental Engineering, National Chiao Tung Univ., Hsinchu, Taiwan (corresponding author).
3. Professor, Dept. of Biological Science and Technology, National Chiao Tung Univ., Hsinchu, Taiwan.
4. Master Student, Institute of Environmental Engineering, National Chiao Tung Univ., Hsinchu, Taiwan.