My book is my Ph.D. thesis on which i have scrutinized the bacteria which can degrade phenol as a pollutant and produce intracellular accumalation in the form of Polyhydroxybutyrate (PHB) which can be use an alternative to synthetic plastic.Where different bio-physico characterization of PHB has done to check its applicabilities as a bioplastics.Where different microbiological & bioanalytical techniques were used.