Lab-Scale Optimization of Polyhydroxyalkanoate Production by Bacterial Strain cmg1415 on Local Cheap Substrates Using One Variable at a Time Approach

Abstract

Production of polyhydroxyalkanoate (PHA) under optimum culture conditions using local cheap feedstocks is indispensable to overcome the current cost of PHA-based plastics. For this purpose, optimum culture conditions and cheap feedstocks were investigated to produce maximum yield of PHA in CMG1415. Maximum yield was obtained with sucrose or sugar beet as sole source of precursors for PHA in 8 days of incubation at 35 °C in a minimal medium adjusted at pH 7. Further, for maximum yield no mechanical shaking was needed. Local cheap feedstock such as sugar beet and molasses were found to play as significant carbon and nitrogen sources for maximum PHA yield.  Bacterial plastic produced under these low-labor-cost culture conditions may to reduce the present cost of degradable bioplastic and be much effective alternate of nondegradable varieties of synthetic plastic.