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Author Spotlight: Optimizing Hollow-Fiber Membranes for Continuous Liquid-Liquid Extraction of Medium-Chain Fatty Acids
Published on: August 9, 2024
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Volatile fatty acid platform - a cornerstone for the circular bioeconomy
F Velghe1, F De Wilde1, S Snellinx2
1OWS nv, Dok-Noord 5, 9000 Gent, Belgium.
FEMS Microbiology Letters
|May 26, 2021
Summary
Europe can transform urban biowaste into valuable volatile fatty acids (VFAs) for a circular economy. This biowaste valorization reduces landfilling and creates sustainable bio-based products.
Area of Science:
- Circular Economy
- Biotechnology
- Waste Management
Background:
- The EU generates over 100 million tonnes of urban biowaste annually, often under-utilized or landfilled.
- Current waste management practices in Europe miss significant opportunities for material and energy recovery from biowaste.
- A circular economy approach is essential for Europe to sustainably manage its biomass potential.
Purpose of the Study:
- To develop a volatile fatty acid platform (VFAP) for converting urban biowaste into valuable products.
- To explore the reprocessing of biowaste-derived volatile fatty acids (VFAs) into biopolymers, bioactive compounds, and chemical building blocks.
- To close material loops through effective biowaste valorization.
Main Methods:
- Investigated volatile fatty acid (VFA) production from various urban biowaste streams, including food waste, vegetable, garden, and fruit waste (VGF), and the organic fraction of municipal solid waste (OF-MSW).
- Employed a membrane filtration cascade (micro-, ultra-, nano-filtration, and reverse osmosis) for purifying and concentrating VFA effluent.
- Assessed socio-economic and legal aspects of the VFAP technology.
Main Results:
- Achieved average VFA yields of 627 g COD/kg OM (food waste), 448 g COD/kg OM (VGF), and 384 g COD/kg OM (OF-MSW).
- Concentrations of VFAs in the effluent ranged from 12-48 g/L (food waste), 6-40 g/L (VGF), and 13-26 g/L (OF-MSW).
- The membrane filtration cascade proved effective for VFA purification, creating a suitable carbon source for fermentation.
Conclusions:
- The VFAP technology offers a viable solution for treating urban biowaste and recovering valuable VFAs.
- Purified VFAs can serve as a sustainable feedstock for producing biopolymers, bioactive compounds, and chemical building blocks.
- The VFAP is expected to play a significant role in future organic waste treatment and bio-based production strategies, aligning with societal and market demands.
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