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- Title
Municipal green waste as substrate for the microbial production of platform chemicals.
- Authors
Volkmar, Marianne; Maus, Anna-Lena; Weisbrodt, Martin; Bohlender, Jonathan; Langsdorf, Alexander; Holtmann, Dirk; Ulber, Roland
- Abstract
In Germany alone, more than 5·106 tons of municipal green waste is produced each year. So far, this material is not used in an economically worthwhile way. In this work, grass clippings and tree pruning as examples of municipal green waste were utilized as feedstock for the microbial production of platform chemicals. A pretreatment procedure depending on the moisture and lignin content of the biomass was developed. The suitability of grass press juice and enzymatic hydrolysate of lignocellulosic biomass pretreated with an organosolv process as fermentation medium or medium supplement for the cultivation of Saccharomyces cerevisiae, Lactobacillus delbrueckii subsp. lactis, Ustilago maydis, and Clostridium acetobutylicum was demonstrated. Product concentrations of 9.4 gethanol L−1, 16.9 glactic acid L−1, 20.0 gitaconic acid L−1, and 15.5 gsolvents L−1 were achieved in the different processes. Yields were in the same range as or higher than those of reference processes grown in established standard media. By reducing the waste arising in cities and using municipal green waste as feedstock to produce platform chemicals, this work contributes to the UN sustainability goals and supports the transition toward a circular bioeconomy.
- Subjects
GERMANY; UNITED Nations; LIGNOCELLULOSE; LACTOBACILLUS delbrueckii; USTILAGO maydis; TREE pruning; JUICERS; CITIES &; towns; CLOSTRIDIUM acetobutylicum; CLOSTRIDIA
- Publication
Bioresources & Bioprocessing, 2023, Vol 10, Issue 1, p1
- ISSN
2197-4365
- Publication type
Article
- DOI
10.1186/s40643-023-00663-2