1. Division of Environmental Engineering, Faculty of Engineering Hokkaido University, North 13, West 8, Kita‐ku Sapporo Hokkaido 060‐8628 Japan
2. Department of Civil Engineering National Institute of Technology, Nagaoka College 888 Nishikatakaimachi, Nagaoka, Niigata 940‐8532 Japan
3. Department of Civil and Environmental Engineering Nagaoka University of Technology 1603‐1 Kamitomioka, Nagaoka, Niigata 940‐2188 Japan
4. Bioproduction Research Institute National Institute of Advanced Industrial Science and Technology (AIST) 2‐17‐2‐1 Tsukisamu‐Higashi, Toyohira‐ku, Sapporo Hokkaido 062‐8517 Japan
5. Department of Civil and Environmental Engineering Graduate School of Advanced Science and Engineering, Hiroshima University 1‐4‐1 Kagamiyama, Higashihiroshima, Hiroshima 739‐8527 Japan
6. Department of Science of Technology Innovation Nagaoka University of Technology 1603‐1 Kamitomioka, Nagaoka, Niigata 940‐2188 Japan