Cross-flow filtration of soy sauce sediment with agitated disk membrane module in an actual process

• Published in: Nihon Shokuhin Kagaku Kōgaku kaishi Vol. 49; no. 9
• Main Authors: "Matsushita, K. (Niigata Univ. (Japan)), Ito, A, Ide, M, Watanabe, A.
• Format: Journal Article
• Language: Japanese
• Published: 01.01.2002
• Subjects: FILTRATION; SAUCES; SOYFOODS
• ISSN: 1341-027X
• DOI: 10.3136/nskkk.49.583

"We have introduced the Agitated Disk Membrane Module (AD module) to an actual soy sauce production line for over five years. The following results were obtained by after analyzing recovery operations of soy sauce from soy sauce sediment. 1) The scale-up operation with additional disk membranes in AD module keeps the permeation flux and the concentration ratio in a pilot scale. Its power consumption is proportional to the 0.09th power of the apparent viscosity of feed suspension, which is similar to the theory in turbulence region of rotating disk in a cylindrical vessel. The AD module is more suitable for clarification of high-density suspensions than conventional tubular membrane modules. 2) The permeate from soy sauce sediment through AD module have retained satisfactory quality as soy sauce for over five years. The continuous lower turbidity proved the stability of rejection of ceramic membrane. The yield of soy sauce from raw soy sauce after AD module introduction have improved to over 99.7% from 80~95% of the traditional process. 3) The permeate flux and the concentration ratio as well as the power consumption of AD module are superior to those of other membrane modules in previous reports of soy sauce sediment filtration. Therefore, it was concluded that the AD module was effective to soy sauce sediment filtration process."