Nanofiltration of biogenic amines in acidic conditions: Influence of operation variables and modeling

✍ Scribed by J. Sabaté; J. Labanda; J. Llorens

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 427 KB
• Volume: 310
• Category: Article
• ISSN: 0376-7388
• DOI: 10.1016/j.memsci.2007.12.003

✦ Synopsis

Biogenic amines are present in some fermented and non-fermented beverages and can cause diseases. This study analyzes the feasibility of separating biogenic amines by nanofiltration in acidic medium. Solutions of chloride salts of three biogenic amines: putrescine, histamine and tyramine were filtered through a nanofiltration membrane with a 1000 Da molecular weight cut-off (MWCO) and a positive electrical charge at pH 3. Increasing the transmembrane pressure or cross flow velocity led to an increase in solute rejection and permeate flow. Moreover, a higher electrical charge or lower concentration of amine cations caused a larger rejection indicating that membrane-solutes repulsion governs the filtration process. Finally, the experimental results were analyzed using the classic Donnan-Steric pore model. Values of 0.83 nm and 5.4 m were estimated for pore radius and membrane effective ratio thickness-porosity from the filtration of neutral solutes. Membrane volumetric charge density and the proton diffusivity inside the pores were estimated from the experimental results.