1. Ph.D. Candidate, Dept. of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India; and Dept. of Urban Engineering, Graduate School of Engineering, Univ. of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan.
2. Helmholtz Zentrum München, German Research Center, Institute of Groundwater Ecology, Ingolstädter Landstr. 1, 85764 Neuherberg, Germany; formerly, Postdoctoral Scientist, Dept. of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
3. Professor, Dept. of Biochemical Engineering and Biotechnology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India (corresponding author).