254 research outputs found
Saccharina latissima, candy-factory waste, and digestate from full-scale biogas plant as alternative carbohydrate and nutrient sources for lactic acid production
To substitute petroleum-based materials with bio-based alternatives,
microbial fermentation combined with inexpensive biomass is suggested. In this
study Saccharina latissima hydrolysate, candy-factory waste, and digestate from
full-scale biogas plant were explored as substrates for lactic acid production.
The lactic acid bacteria Enterococcus faecium, Lactobacillus plantarum, and
Pediococcus pentosaceus were tested as starter cultures. Sugars released from
seaweed hydrolysate and candy-waste were successfully utilized by the studied
bacterial strains. Additionally, seaweed hydrolysate and digestate served as
nutrient supplements supporting microbial fermentation. According to the
highest achieved relative lactic acid production, a scaled-up co-fermentation
of candy-waste and digestate was performed. Lactic acid reached a concentration
of 65.65 g/L, with 61.69% relative lactic acid production, and 1.37 g/L/hour
productivity. The findings indicate that lactic acid can be successfully
produced from low-cost industrial residues.Comment: 25 pages, 6 figure
- …