Mardal F, Parjikolaei B R, Corredig M
Department of Food Science, Aarhus University, 8200 Aarhus N, Denmark; Arla Foods Ingredients P/S, 6920 Videbaek, Denmark.
Arla Foods Ingredients P/S, 6920 Videbaek, Denmark.
J Dairy Sci. 2024 Dec;107(12):10414-10425. doi: 10.3168/jds.2024-25107. Epub 2024 Aug 3.
This research used a customized laboratory setup to compare the filtration performance and fouling buildup during microfiltration with polymeric membranes of skim milk using 2 diafiltration media: ultrafiltration permeate and ultrapure water. Two filtration modes were evaluated: in stage 1, the diafiltration media was added in a 1:1 ratio, with the collection of permeate continuing until the initial protein concentration was restored. In stage 2, retentates and permeates were recycled to simulate fouling accumulation in a steady-state without altering the retentate composition. Utilizing water as the diafiltration medium resulted in higher flux and lower resistance values compared with using ultrafiltration permeate, irrespective of the filtration mode. The concentration had a significant effect on membrane resistance, with no noticeable time-dependent effect on fouling layer development after 60 min of filtration when the retentate composition remained constant. The protein composition of the permeate and extracted foulants were comparable between the 2 media, with caseins predominating in the fouling layer.
本研究采用定制的实验室装置，使用两种渗滤介质（超滤透过液和超纯水），比较脱脂乳在微滤过程中使用聚合物膜时的过滤性能和污垢积累情况。评估了两种过滤模式：在第一阶段，以1:1的比例添加渗滤介质，并持续收集透过液，直至恢复初始蛋白质浓度。在第二阶段，截留物和透过液循环利用，以模拟稳态下的污垢积累，同时不改变截留物的组成。无论采用何种过滤模式，与使用超滤透过液相比，用水作为渗滤介质可获得更高的通量和更低的阻力值。浓度对膜阻力有显著影响，当截留物组成保持恒定时，过滤60分钟后，污垢层的发展没有明显的时间依赖性影响。两种介质的透过液和提取污垢的蛋白质组成相当，污垢层中以酪蛋白为主。
