Impact of Hydrolysis Methods on the Utilization of Agricultural Residues as Nutrient Source for D-lactic Acid Production by Sporolactobacillus inulinus
| Autor: | Anja Kuenz, Silvia Brock, Ulf Prüße |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Rapeseed Plant Science 01 natural sciences Biochemistry Genetics and Molecular Biology (miscellaneous) chemistry.chemical_compound Hydrolysis 0404 agricultural biotechnology Polylactic acid 010608 biotechnology Enzymatic hydrolysis agricultural residues Yeast extract Food science lcsh:TP500-660 nutrient sources food and beverages enzymatic hydrolysis 04 agricultural and veterinary sciences Sporolactobacillus inulinus lcsh:Fermentation industries. Beverages. Alcohol 040401 food science Lactic acid chemical hydrolysis chemistry Yield (chemistry) Fermentation Food Science |
| Zdroj: | Fermentation, Vol 5, Iss 1, p 12 (2019) Fermentation; Volume 5; Issue 1; Pages: 12 |
| ISSN: | 2311-5637 |
| Popis: | d-lactic acid is a building block for heat resistant polylactic acid, a biobased polymer with a high potential. Nevertheless, an economically efficient industrial process for d-lactic acid production still needs to be implemented. Yeast extract is an expensive nutrient source, which is used to fulfill the complex nutritional requirements in lactic acid fermentations. The substitution of yeast extract by cheap alternative nutrient sources is a challenge in many fermentation processes. In this study, chemical and enzymatic hydrolysis techniques for protein rich agricultural residues and their effectiveness are compared, as well as their impact on the d-lactic acid production of Sporolactobacillus inulinus. An efficient substitution of yeast extract could be achieved by a variety of agricultural residues, hydrolysed with 3M H2SO4, demonstrating the much higher versatility and effectiveness of this method compared to enzymatic methods. In a fed-batch experiment with chemically hydrolyzed rapeseed meal and minimal supplementation, a lactic acid titer of 221 g L−1 and an overall productivity of 1.55 g (L h)−1 (96% yield) were obtained. |
| Databáze: | OpenAIRE |
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