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- Title
A Simple Biorefinery Concept to Produce 2G-Lactic Acid from Sugar Beet Pulp (SBP): A High-Value Target Approach to Valorize a Waste Stream.
- Authors
Alves de Oliveira, Regiane; Schneider, Roland; Hoss Lunelli, Betânia; Vaz Rossell, Carlos Eduardo; Maciel Filho, Rubens; Venus, Joachim; Łukasik, Rafał
- Abstract
Lactic acid is a high-value molecule with a vast number of applications. Its production in the biorefineries model is a possibility for this sector to aggregate value to its production chain. Thus, this investigation presents a biorefinery model based on the traditional sugar beet industry proposing an approach to produce lactic acid from a waste stream. Sugar beet is used to produce sugar and ethanol, and the remaining pulp is sent to animal feed. Using Bacillus coagulans in a continuous fermentation, 2781.01 g of lactic acid was produced from 3916.91 g of sugars from hydrolyzed sugar beet pulp, with a maximum productivity of 18.06 g L−1h−1. Without interfering in the sugar production, ethanol, or lactic acid, it is also possible to produce pectin and phenolic compounds in the biorefinery. The lactic acid produced was purified by a bipolar membrane electrodialysis and the recovery reached 788.80 g/L with 98% w/w purity.
- Subjects
LACTIC acid; SUGAR beets; PULPING; VALUE chains; ANIMAL feeds; PHENOLS; SUGAR
- Publication
Molecules, 2020, Vol 25, Issue 9, p2113
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules25092113