Optimization of propionic acid production in apple pomace extract withPropionibacterium freudenreichii

Biochemical conversion of Brassicacarinata biomass to organic acids

“…acidipropionici . Similarly, a lower yield was reported for sweet sorghum bagasse hydrolysate (0.51 g/g; Ammar et al, 2020) and apple pomace extract (up to 0.38 g/g; Piwowarek et al, 2019) using P. freudenreichii .…”

“…Lower propionic acid yields were reported for Jerusalem artichoke hydrolysate (0.38-0.48 g/g; Liang et al, 2012), sugarcane bagasse hydrolysate (0.29 and 0.37 g/g; Zhu et al, 2012), corn stover hydrolysate (0.44-0.50 g/g; Wang et al, 2017), and sorghum bagasse hemicellulosic hydrolysate (0.41 g/g; Castro et al, 2020), when used as carbon sources for P. acidipropionici. Similarly, a lower yield was reported for sweet sorghum bagasse hydrolysate (0.51 g/g; Ammar et al, 2020) and apple pomace extract (up to 0.38 g/g; Piwowarek et al, 2019) using P. freudenreichii.…”

Use of Propionibacterium freudenreichii T82 Strain for Effective Biosynthesis of Propionic Acid and Trehalose in a Medium with Apple Pomace Extract and Potato Wastewater

“…However, the individual use of potato wastewater or apple pomace will not provide beneficial results because of the low content of separate substrates in these wastes—nitrogen in the case of pomace and sugar in the case of potato wastewater. It would result in a very high or very low molar ratio of carbon to nitrogen in the environment, which in turn would limit the metabolic activity of microorganisms [ 11 ]. A previous study has already described that the type and concentration of nitrogen and vitamin sources have an impact on the metabolic activity of PAB [ 27 , 28 ].…”

“…Growing social awareness and care for the environment have together contributed to an increased demand for ecological food and cosmetic products. An interesting alternative, which enables economical as well as sustainable production of industrially valuable substances, seems to be the biotechnological utilization of industrial waste with the use of microorganisms such as PAB [ 11 , 12 , 13 , 14 , 15 , 16 ]. They have GRAS and QPS statuses, which indicates that both living cells and metabolites of these microorganisms can be used in the production of food, cosmetics, and drugs.…”

“…Most scientific reports describe that PAB can be cultivated in an environment containing waste materials, which often requires supplementation with expensive sources of nitrogen or other elements in the form of pure laboratory preparations. Earlier studies [ 11 , 12 ] used apple pomace as the carbon source but peptone and yeast extract as the nitrogen source. Taking into account the efficiency of the process and the costs incurred, it was shown that the production of propionate under these conditions is unprofitable (price of 1 kg of propionate = $3) [ 12 ], as the costs of substrate components (peptone, yeast extract, biotin, and mineral salts) are very high.…”