Double-stage membrane-assisted anaerobic digestion process intensification for production and recovery of volatile fatty acids from food wasteShow others and affiliations
2022 (English)In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 825, article id 154084Article in journal (Refereed) Published
Abstract [en]
The potential of organic waste streams (i.e., food waste) for the sustainable production of precursor chemicals such as volatile fatty acids (VFAs) using anaerobic digestion (AD) has received significant attention in the present days. AD-derived VFAs have great market appeal if the challenges with their recovery and purification from the complex AD effluent is overcome. In this study, a microfiltration immersed membrane bioreactor (MBR) was used for the production of VFAs from food waste and simultaneously in-situ recovery of VFAs. The MBR set-up was applied for 98 days, with a maximum yield of 0.2 gVFA/gVSadded at an organic loading rate (OLR) of 4 g VS/L/d. The recovered permeate was then subjected to further purification using a side stream ultrafiltration unit. It was found that the removal rates of total solids (TS), total suspended solids (TSS), dissolved solids (DS), volatile solids (VS) and volatile suspended solids (VSS) were above 70–80% in both membranes (10 kDa and 50 kDa), and Phosphorus (P), Total Kjeldahl Nitrogen (TKN), chemical oxygen demand (COD), and NH4+-N were also removed partially. Particularly, VFAs concentration (above 6 g/L) was higher for 10 kDa at pH 5.4 in ultrafiltered solution and permeate flux decline was higher for 10 kDa at pH 5.4. These results are also supported by the measurement of UV–Vis spectra of the solution and visual appearance, providing a promising approach towards building a VFAs-based platform. © 2022 Elsevier B.V.
Place, publisher, year, edition, pages
Elsevier B.V. , 2022. Vol. 825, article id 154084
Keywords [en]
Anaerobic membrane bioreactor, Food waste, Microfiltration, Ultrafiltration, Volatile fatty acids (VFAs), Anaerobic digestion, Bioconversion, Bioreactors, Chemical oxygen demand, Dissolved oxygen, Effluents, Organic chemicals, Purification, Recovery, Volatile fatty acids, Anaerobic digestion process, Double stage, Organic wastes, Process intensification, Sustainable production, Volatile fatty acid, Volatile solid, Waste stream, ammonia, nitrogen, oxygen, phosphorus, Article, batch fermentation, concentration (parameter), effluent, fatty acid synthesis, gas chromatography, inoculation, pH, suspended particulate matter, thermal conductivity, ultraviolet spectroscopy, waste component removal
National Category
Bioprocess Technology
Research subject
Resource Recovery
Identifiers
URN: urn:nbn:se:hb:diva-27662DOI: 10.1016/j.scitotenv.2022.154084ISI: 000766794300017Scopus ID: 2-s2.0-85125344826OAI: oai:DiVA.org:hb-27662DiVA, id: diva2:1646013
Note
Export Date: 21 March 2022; Article; CODEN: STEVA; Correspondence Address: Bilgiç, B.; Department of Environmental Engineering, Maslak, Turkey; email: bilgic@itu.edu.tr; Funding details: Vetenskapsrådet, VR; Funding details: Università degli Studi di Salerno, UNISA; Funding details: Högskolan i Borås, HB; Funding text 1: The authors would like to express their sincere gratitude to the support from the Sanitary Environmental Engineering Division (SEED) and grants FARB projects from the University of Salerno . The PhD School in “Risk and Sustainability in Civil Engineering, Environmental and Construction” is also acknowledged for the scholarships (cycle-XXXIV) of Md. Nahid Pervez. The authors would also like to express their gratitude to the University of Borås , Sweden's Innovation Agency and Swedish Research Council for their technical and financial support of this work.; Funding text 2: The authors would like to express their sincere gratitude to the support from the Sanitary Environmental Engineering Division (SEED) and grants FARB projects from the University of Salerno. The PhD School in ?Risk and Sustainability in Civil Engineering, Environmental and Construction? is also acknowledged for the scholarships (cycle-XXXIV) of Md. Nahid Pervez. The authors would also like to express their gratitude to the University of Bor?s, Sweden's Innovation Agency and Swedish Research Council for their technical and financial support of this work.
2022-03-212022-03-212022-03-31Bibliographically approved