A method for parallel production of sugarcane concentrated juice and sugarcane drinking water by multi-stage membrane

Abstract

A method for producing sugarcane concentrated juice and sugarcane drinking water in parallel with multi-stage membranes. The steps are as follows: sugarcane is blanched to kill enzymes, squeezed to extract juice, and coarsely filtered to obtain coarsely filtered sugarcane juice; the coarsely filtered sugarcane juice is passed through the first ceramic After membrane ultrafiltration clarification, sugarcane clarified juice is obtained; sugarcane clarified juice is concentrated by organic nanofiltration membrane to obtain nanofiltration clear liquid and nanofiltration concentrated liquid; nanofiltration concentrated liquid is sterilized by second ceramic membrane ultrafiltration and aseptic filling The concentrated sugarcane juice is obtained; the nanofiltration clear liquid is purified by an organic reverse osmosis membrane to obtain a reverse osmosis clear liquid; the reverse osmosis clear liquid is subjected to ultrafiltration and aseptic filling by a third ceramic membrane to obtain sugarcane drinking water. Based on the integration of membrane process separation, concentration and cold sterilization, the invention uses sugarcane as a raw material to produce high-quality sugarcane concentrated juice and sugarcane drinking water in parallel, which is beneficial to product optimization and upgrading and comprehensive utilization of sugarcane resources.

Description

technical field [0001] The invention relates to a method for parallel production of sugarcane concentrated juice and sugarcane drinking water by multi-stage membranes, belonging to the technical field of food processing. [0002] technical background [0003] Sugarcane is not only a raw material for sugar production, but also a fruit unique to subtropical and tropical regions. It is rich in juice, high in sugar content, and has a sweet taste, which is widely loved by people. In addition, sugarcane also has the functions of clearing away heat and detoxification, promoting body fluid and quenching thirst, harmonizing the stomach and relieving vomiting, nourishing yin and moistening dryness, etc. It is a high-quality raw material for the production of beverages. At present, the method of making beverage with sugarcane juice mainly contains two kinds: a kind of is directly squeezed sugarcane juice and is mixed with beverage; Limited by resources and raw materials, it is impossi...

AI Technical Summary

Problems solved by technology

Though this method can process the sugarcane concentrated juice that concentration is higher, thus helps to save the cost of transportation and storage, but still has many deficiencies: (1) after the sugarcane is squeezed out of the juice, the enzyme is deactivated, and the enzyme deactivation temperature High temperature (95-100°C) can easily cause the decomposition of heat-sensitive substances in sugarcane juice, such as sterols, alkanols and polyphenols, etc., resulting in the loss of nutrients and flavor substances in sugarcane juice; (2) Before ultrafiltration and clarification It needs to go through two cumbersome processes of centrifugation and enzymatic hydrolysis, high energy consumption, and sugarcane juice contains more nutrients needed for microbial growth, coupled with long enzymatic hydrolysis time (60-90min), it is very easy to infect bacteria , will cause sugarcane juice to deteriorate; (3) The temperature of evaporation and concentration is relatively high (the temperature of first-effect evaporation is close to 90°C), and the entrainment of mist in the evaporation process will cause a large loss of aromatic substances in sugarcane juice; (4) The heat load of thermal sterilization will lead to the destruction of flavor substances and nutrients in sugarcane juice, thus affecting the quality of sugarcane juice

Although this method extracts the water in the sugarcane and processes it into drinking water, it can extract the sugar in the sugarcane at the same time, but the condensed water of the first and second effects comes from the clarified sugarcane juice, and the sugarcane juice clarification process Added more chemical reagents as clarifiers, such as: lime, SO 2 , phosphoric acid and polyacrylamide, etc., the water obtained in this way will inevitably destroy the free radicals beneficial to the human body in sugarcane water, and even leave a small amount of harmful chemical substances, especially the monomer (acrylic acid) for synthesizing polyacrylamide. a carcinogen

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