Method for producing polyhydroxyalkanoates by microorganisms

摘要

The invention relates to a method for selection and maintenance of a selected microbial consortium for polyhydroxyalkanoates (PHA) production, said microbial consortium being fed with at least one readily biodegradable carbon substrate, comprising a first step of aerobic cultivation of said microbial consortium in a mixed biological reactor. According to the invention, the specific cell growth rate µ 1 of said microbial consortium is fixed at a target value, in said first step of aerobic cultivation and in that said first step of aerobic cultivation is performed under nutrient limitation such as the readily biodegradable carbon substrate uptake rate qS 1 is unbalanced with said fixed specific cell growth rate µ 1 .