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Enhancing Volatile Fatty Acids Recovery Through Nanofiltration: A Sustainable and Efficient Solution Within the Circular Economy
Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II #132, 84084, Fisciano, SA, Italy.
University of Borås, Faculty of Textiles, Engineering and Business. (Swedish Centre for Resource Recovery)
Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II #132, 84084, Fisciano, SA, Italy.
Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, Via Giovanni Paolo II #132, 84084, Fisciano, SA, Italy.
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2024 (English)In: Resource Recovery from Wastewater Treatment / [ed] Giorgio Mannina, Alida Cosenza, Antonio Mineo, Springer Nature, 2024, p. 99-105Conference paper, Published paper (Refereed)
Sustainable development
According to the author(s), the content of this publication falls within the area of sustainable development.
Abstract [en]

Biologically-derived volatile fatty acids (VFAs) are gaining attention as a sustainable alternative to petroleum-based VFAs. The anaerobic digestion (AD) process can effectively recover VFAs from organic-rich waste and wastewater, aligning with the principles of the circular bio-economy and sustainability. However, this approach currently faces several challenges. The AD effluent contains mixed VFAs, in relatively low concentrations, solubilized in water along with other compounds. This necessitates the development of strategies for concentration, separation, and purification. Membrane filtration technologies, particularly nanofiltration (NF), have emerged as advantageous solutions to address these challenges. This study investigates the application of the NF process for concentrating and fractionating solubilized VFAs, exploring the impact of membrane properties and feed pH on permeate flux and VFAs rejection. Two commercial NF membranes (“DK” and “XN45”) were tested under four different pH values of the feed (4, 5.5, 7, and 9). The results indicate that increasing feed pH enhances VFAs concentration but reduces permeate flux. Membrane properties strongly influence permeate flux and VFAs concentration and fractionation. Notably, the application of the XN45 membrane with a feed pH of 9 represents the best alternative among the tested conditions in terms of VFA concentration. 

Place, publisher, year, edition, pages
Springer Nature, 2024. p. 99-105
Series
Lecture Notes in Civil Engineering ; 524
Keywords [en]
Resource recovery, membrane technology, circular economy
National Category
Other Industrial Biotechnology
Research subject
Resource Recovery; Resource Recovery
Identifiers
URN: urn:nbn:se:hb:diva-33203DOI: 10.1007/978-3-031-63353-9_18Scopus ID: 2-s2.0-85197858632OAI: oai:DiVA.org:hb-33203DiVA, id: diva2:1929932
Conference
ICWRR 2024, Palermo, June 2024.
Available from: 2025-01-21 Created: 2025-01-21 Last updated: 2025-01-21Bibliographically approved

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Mahboubi, AmirTaherzadeh, Mohammad J

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