2-phenylethanol (2PE) is a fragrance molecule predominantly used in perfumes and the food industry. It can be made from petrochemicals inexpensively, however, this is unsuitable for most food applications. Currently, the main method of production for the bio-derived compound is to extract the trace amounts found in rose petals, which is extremely costly. Potentially fermentation could provide an inexpensive, naturally sourced, alternative. In this investigation, 2PE was produced from the yeast Metschnikowia pulcherrima, optimised in flasks before scaling to 2L batch and continuous operation. 2PE can be produced in high titres under de novo process conditions with up to 1,500 mg/L achieved in a 2L stirred bioreactor. This is the highest reported de novo titre to date, and achieved through high sugar loadings coupled with low nitrogen conditions. The process successfully ran in continuous mode also, with a concentration of 650 mg/L of 2PE being maintained. The 2PE production was further increased by the ex-novo conversion of phenylalanine and semi-continuous solid phase extraction from the supernatant. Under optimal conditions 14,000 mg/L of 2PE was produced. The work presented here offers a novel route to naturally sourced 2PE through a scalable fermentation with a robust yeast highly suited to industrial biotechnology.
In this dataset the underlying data is presented including calibration curves. Files are named according to the figure that they are related to in the original paper.