The Specific Steps of The Application of Membrane Concentration in Juice

Juice Pretreatment: The raw juice is first subjected to pretreatment, which usually includes filtration to remove large - sized impurities such as pulp, fibers, and suspended solids. This step helps to protect the membrane from clogging and damage, and improve the efficiency and service life of the membrane concentration process.

Membrane Selection: According to the characteristics of the juice and the requirements of the concentration process, an appropriate membrane is selected. Common membrane types include reverse osmosis membranes, nanofiltration membranes, etc. The selection of the membrane needs to consider factors such as its separation accuracy, permeability, and chemical stability.

Concentration Operation: The pretreated juice is pumped into the membrane concentration system. Under the action of pressure, the water and some small - molecular substances in the juice pass through the membrane, while the large - molecular substances such as sugars, pectin, and vitamins are retained, thereby achieving the purpose of concentration. During the concentration process, parameters such as pressure, temperature, and flow rate need to be strictly controlled to ensure the quality and efficiency of the concentration.

Concentrate Collection and Post - Treatment: The concentrated juice is collected after passing through the membrane concentration system. Depending on the specific product requirements, the concentrated juice may undergo further post - treatment, such as sterilization, packaging, and addition of appropriate preservatives to ensure the safety and shelf life of the product.