| 摘要 |
PURPOSE:To enable the decoloration of a liquid food in high efficiency at an arbitrary degree of decoloration using an ultrafiltration membrane, a reverse osmosis membrane having low salt rejection, etc., by adding fine particles of a polymeric substance or a hardly soluble substance to stock liquid and decoloring the liquid with a membrane. CONSTITUTION:A liquid food to be decolored is added with 0.01-1.0wt% additive consisting of one or more kinds of particles of a polymeric substance having a molecular weight of >=5,000 (e.g., gelatin, soybean protein, albumen, etc.) or a hardly soluble substance (e.g., amino acid, organic acid, inorganic acid, etc.) having particle size unable to pass through the membrane used in the present process. The obtained liquid is decolored with a membrane such as an ultrafiltration membrane having a critical molecular weight of >=5,000 or a reverse osmosis membrane having an NaCl rejection of <=30% etc. |
