1 KENTECH Institute for Environmental and Climate Technology, Korea Institute of Energy Technology, 200 Hyeoksin-ro, Naju-si, Jeollanam-do, Republic of Korea.
2 Bioengineering and Environmental Engineering Lab, Department of Energy and Environmental Engineering, CSIR-Indian Institute of Chemical Technology, Hyderabad 500 007, India. Electronic address: svmohan@iict.res.in.