The rapid increase in population and industrialization leads to huge amount of waste discharge. On the other hand the increased use of energy creates a huge demand for renewable energy resources. Several efforts were taken by researchers to overcome this issue which can be a savior for the future generations. Even though efforts were made, they should be communicated to the co-researchers for knowledge upgradation. In line with this, Department of Biotechnology of Arunai Engineering College, Tiruvannamalai, Tamilnadu, India organized a four day conference "2nd International Conference on Bioenergy, Environment and Sustainable Technologies (BEST2015)" during 28-31 January 2015. Several papers were presented orally in the theme of this conference, among which the best were offered a chance to published in this e-book of Management of Environment Quality under the theme of Renewable Energy. This edition has 9 chapters which were presented in the conference.