Production of PHAs from whey has been described in different works. Marangoni et al. (6) and Koller et al. (7) produced PHAs from hydrolyzed whey permeate with Ralstonia eutropha DSM545 and Pseudomonas hydrogenovora, respectively. In the work of Nikel et al. (8) a recombinant Escherichia coli strain was used with whey supplemented with corn steep liquor. Hydrogenophaga pseudoflava DSM1034 (9) and Methylobacterium sp. ZP24 (10) have been reported as examples of wild-type microorganisms able to synthesize PHAs directly from lactose. In all of the above-mentioned examples of PHA production with whey, the use of a pure culture, recombinant or not, required aseptic conditions. Recently, Pantazaki et al. (11) described the production of a heteropolymer from whey by Thermus thermophilus HB8, and a sterile process was also necessary in this case.