Recovery
Recovery is the crucial step of PHB production since it could make the production either economically efficient or inefficient. One of the commonly used recovery treatment is sodium hypochlorite [10]. PHB recovery using sodium hypochlorite treatment results in 95% recovery in recombinant E. coli. In the recovery step, the higher the concentration of the biomass, the better the recovery is. Yet, purity decreases as the concentration of biomass increases. PHB recovered using 20 % sodium hypochlorite yields 3.5% biomass concentration maximum and 83% purity (Figure 7). Due to the incompatibility between the biomass concentration and purity of PHB, sodium hypochlorite treatment does not satisfy the criteria required to make PHB production more cost efficient.