Effect of total solid content and pretreatment on the production of lactic acid from mixed culture dark fermentation of food waste
Abstract
Food waste landfilling causes environmental degradation, and this work assesses a sustainable food valorization technique. In this study, food waste is converted into lactic acid in a batch assembly by dark fermentation without pH control and without the addition of external inoculum at 37 °C. The effect of total solid (TS), enzymatic and aeration pretreatment was investigated on liquid products concentration and product yield. The maximum possible TS content was 34% of enzymatic pretreated waste, and showed the highest lactic acid concentration of 52 g/L, with a lactic acid selectivity of 0.6 g lactic/g totalacids. The results indicated that aeration pretreatment does not significantly improve product concentration or yield. Non-pretreated waste in a 29% TS system showed a lactic acid concentration of 31 g/L. The results showed that enzymatic pretreated waste at TS of 34% results in the highest production of lactic acid.
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A high amount of lactic acid (52 g/L) was produced by dark fermentation after enzymatic pretreatment and controlling total solid content of food waste at 34%.
“A high amount of lactic acid (52 g/L) was produced by dark fermentation after enzymatic pretreatment and controlling the total solid content of food waste at 34% [90].”
From Food Waste Biorefinery: Pathway towards Circular Bioeconomy (2021) · cites this paper as [90]
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Food Waste Biorefinery: Pathway towards Circular Bioeconomy
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- Authors
- Yousuf, A., Bastidas-Oyanedel, J.-R., & Schmidt, J. E.
- Affiliations
- Khalifa University of Science and Technology (AE)
- Venue
- Waste Management
- Publisher
- Elsevier BV
- Published
- 2018-07
- Volume
- 77
- Pages
- 516-521
- ISSN
- 0956-053X (ISSN-L)
- OpenAlex
- W2801712379
- Cited by
- 59
- References
- 40
- Citations by year
- 2026: 6 · 2025: 4 · 2024: 6 · 2023: 7 · 2022: 13 · 2021: 6 · 2020: 8 · 2019: 7 · 2018: 2
- FWCI
- 4.61
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Waste Management (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Masdar Institute of Science and Technology (SS2014-000003)
- Topics
- Physical Sciences › Engineering › Building and Construction › Anaerobic Digestion and Biogas Production
- Physical Sciences › Engineering › Biomedical Engineering › Biofuel production and bioconversion
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Composting and Vermicomposting Techniques
- Keywords
- lactic acid production, dark fermentation, food waste, total solids, enzymatic pretreatment, mixed culture fermentation, food valorization
- MeSH terms
- Fermentation, Food, Waste Management, Bioreactors, Lactic Acid
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