Feasibility of nanofiltration process for high efficient recovery and concentrations of food waste-derived volatile fatty acidsShow others and affiliations
2022 (English)In: Journal of Water Process Engineering, E-ISSN 2214-7144, Vol. 48, article id 102933Article in journal (Refereed) Published
Sustainable development
According to the author(s), the content of this publication falls within the area of sustainable development.
Abstract [en]
Various methods exist for the recovery of volatile fatty acids from organic mixed waste effluents, and among them, the membrane filtration process holds a great promise over other recovery methods due to their simplicity, sustainability and high efficiency. Hence, in this study, nanofiltration experiments were carried out using two commercial nanofiltration membranes of 200–300 Da and 300–500 Da under various pH (4, 5.4, 7 and 9) at constant pressure (15 bar) and temperature of 20-21 °C in order to achieve a higher amount of volatile fatty acids from the real mixed food waste-based effluent. Results showed that solution pH plays an important role in the physicochemical parameters such as total solids removal rate was above 80 % at pH 4, chemical oxygen demand, ammonia and phosphorus removed to some extent at pH 9. Subsequently, the concentration and recovery percentages of volatile fatty acids increased with solution pH 9; in particular, lower molecular weight cut-off membrane, i.e., 200–100 Da, appeared to be more effective with an increased concentration of total volatile fatty acids (16.94 g L−1) and recovery percentage above 90 % at pH 9. Membrane performance was also evaluated and correlated with recovery performance in terms of permeate flux reduction at lower pH. An important finding of this study was the concentration and recovery percentages of volatile fatty acids reached around 96 % after 3rd cycle by conducting a repeated sequencing nanofiltration process, which was identified as a promising option to enhance the recovery percentages of volatile fatty acids.
Place, publisher, year, edition, pages
2022. Vol. 48, article id 102933
Keywords [en]
Waste biorefinery, Food waste, Circular economy, Anaerobic membrane bioreactor, Volatile fatty acids, Nanofiltration
National Category
Water Engineering Other Industrial Biotechnology
Research subject
Resource Recovery
Identifiers
URN: urn:nbn:se:hb:diva-28235DOI: 10.1016/j.jwpe.2022.102933ISI: 000812937900001Scopus ID: 2-s2.0-85132327857OAI: oai:DiVA.org:hb-28235DiVA, id: diva2:1682087
2022-07-082022-07-082023-08-25Bibliographically approved