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- W3091935021 abstract "Lactic acid is a building block for polylactic acid, which is one of the most promising polymers based on renewable resources and is used mainly in packaging industry. This bio-based polymer is biodegradable and provides an ecological and economical alternative to petrochemical plastics. The largest cost blocks of biotechnological lactic acid production, accounting for up to 38% of the total costs, are substrate and nutrient sources, such as peptone, meat, and yeast extract. Based on a systematic analysis of nutritional requirements, the substitution of yeast extract by low-cost protein-rich agricultural hydrolysates was estimated for the production of l-lactic acid with Lactobacillus casei. Cultivations in 24-well microtiter plates enabled analysis of nutrient requirements and the usage of various hydrolysates with a high parallel throughput and repeated sampling. Rapeseed meal (RM) and distillers’ dried grains with solubles (DDGS) were tested as low-cost protein-rich agricultural residues. By using chemically or enzymatically hydrolyzed rapeseed meal or DDGS, 70% of the nutrient sources was replaced in the fermentation process at identical productivity and product yields. All in all, the total costs of l-lactic acid production with Lactobacillus casei could potentially be reduced by up to 23%." @default.
- W3091935021 created "2020-10-15" @default.
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- W3091935021 date "2020-10-06" @default.
- W3091935021 modified "2023-09-25" @default.
- W3091935021 title "Hydrolyzed Agricultural Residues—Low-Cost Nutrient Sources for l-Lactic Acid Production" @default.
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- W3091935021 doi "https://doi.org/10.3390/fermentation6040097" @default.
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