骨提取液的梯度膜法浓缩研究

Concentration of Bone Extracts Using Gradient Series Membrane

针对传统浓缩工艺耗能高、产品品质低等问题,设计了一种基于微滤-反渗透梯度串联膜浓缩方法用于骨提取液的浓缩。新鲜原料骨破碎后,配成质量分数为33%～40%的鸡骨渣悬浮液加入到提取罐内,在0～0.3 MPa的压力下经过30～120 min热压抽提后得到骨提取液。提取液经过静置除渣、脱脂后,利用微滤-反渗透膜循环梯度浓缩至Brix 5°～50°,然后进行调和、杀菌操作。该技术应用膜法梯度浓缩技术,能够在较低的温度下除去骨提取液中的水分,显著减少了骨提取液的营养和风味损失,降低了能耗与生产成本。

A concentration system of microfiltration and reverse osmosis membrane was designed for the concentration of bone extracts to substitute traditional process,which always consumed lot of energy and decreased the quality of products. After being broken into blocks,the fresh bone material was added to extraction tank with water（ 33% ～ 40%,w / w） to prepare bone extracts,and the hot pressure extraction time was 30 ～ 120 min at 0 ～ 0. 3 MPa. After standing in slag and degreasing,bone extracts was concentrated to brix of 5° ～ 50° using microfiltration and reverse osmosis membrane,which was followed by blending and sterilization operation. This gradient series membrane could remove water from bone extracts at the lower temperature,and thus decreasing the loss of nutrition and flavor. In addition,this technology could reduce the consumption of energy and cost of production.