Dr. Ajay Kalamdhad is currently working as an Associate Professor in Department of Civil Engineering, Indian Institute of Technology (IIT) Guwahati. He obtained his Bachelors, Masters and PhD in Civil and Environmental Engineering from GEC Jabalpur, VNIT Nagpur and IIT Roorkee respectively. Prior to joining IIT Guwahati in 2009, He was an Assistant Professor at VNIT Nagpur and worked in various projects at RRL, Bhopal (Now AMPRI, Bhopal) and NEERI, Nagpur. In addition to his book on rotary drum composting, Dr Kalamdhad has published more than 100 research papers in acclaimed journals and has presented his work in more than 150 national and international conferences/workshops. He is associated with Indian Public Health Engineers, India, International Solid Waste Association Italy and National Solid Waste Association of India; and serves as a reviewer for 20 international journals. He is a recipient of ISTE- GSITS national award for best research by young teachers) of engineering colleges for the year 2012 and IEI Young Engineers Award 2011-2012 in Environmental Engineering discipline from Institute of Engineers India.