Process for the production of polyhydroxyalkanoate

Summary

The present invention relates to a process for the production of polyhydroxyalkanoate (PHA), the process comprising the steps of: - introducing a gas composition comprising CO into a bioreactor comprising a PHA-producing microorganism capable of fermenting CO, an acetogenic microorganism and a culture medium; - anaerobic conversion of CO into H2 and CO2 by the PHA-producing microorganism capable of fermenting CO; - anaerobic conversion of CO2 and H2 into acetate, and optionally additional fermentation products, by the acetogenic microorganism; - anaerobic conversion of acetate, and optionally additional fermentation products, into PHA by the PHA-producing microorganism capable of fermenting CO. The invention further relates to PHA obtainable by the process according to the invention.