Journal article
Fermentative Production of Lactic Acid as a Sustainable Approach to Valorize Household Bio-Waste
Department of Environmental Engineering, Technical University of Denmark1
Technical University of Denmark2
Bacterial Cell Factory Optimization, Research Groups, Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark3
Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark4
Source-sorted organic portion of municipal solid waste (bio-waste) can be fermented to lactic acid, a platform chemical widely used in the production of biodegradable polymers, green solvents, and chemicals. In the present study, fermentation of bio-waste using lactic acid producing bacterium (LAB) Lactobacillus delbrueckii was investigated.
Results showed that adding 10% (v/v) of L. delbrueckii as LAB inoculum along with pH adjustment to 6.2 had the highest lactic acid yield (0.65 g/gtotal sugars). Nevertheless, pH adjustment without bio-augmentation could also result in relatively high yield of lactic acid (0.57 g/gtotal sugars). Furthermore, enzymatic hydrolysis was applied to boost the lactic acid production slightly increasing the yield to 0.72 g/gtotal sugars.
Thus, fermentative production of lactic acid can be achieved without the addition of enzymes to reduce production costs. Overall, the results indicate that bio-waste could be a suitable substrate for the production of lactic acid.
| Language: | English |
|---|---|
| Year: | 2020 |
| ISSN: | 26734524 |
| Types: | Journal article |
| DOI: | 10.3389/frsus.2020.00004 |
| ORCIDs: | Tsapekos, Panagiotis , Alvarado-Morales, Merlin , Bosma, Elleke F. and Angelidaki, Irini |
