Biological treatment method for sulfur-free sugarcane juice clarification

Abstract

The invention belongs to the technical field of cane sugar processing and in particular relates to a biological treatment method for sulfur-free sugarcane juice clarification. The biological treatment method specifically comprises the following operation steps: (1) squeezing sugarcane; (2) carrying out rough filtration treatment; (3) carrying out adjustment; (4) carrying out immobilized enzyme treatment; (5) carrying out flocculation bacterium treatment; (6) carrying out flocculation settling; and (7) carrying out separation, namely outputting upper clear juice obtained in the step (6), carrying out filter press separation on settled muddy juice at a lower layer, and combining the settled muddy juice with the upper clear juice, so as to obtain clear juice. The biological treatment method has the advantages that a high-quality sugar product can be produced, and the food security risk can be reduced. In the process, the amount of lime and phosphoric acid only accounts for 20% or less of that of a common sulfur-free sugar making process, a small amount of filter mud is produced, and the production process is environment-friendly and safe.

Description

technical field [0001] The invention belongs to the technical field of sucrose production, and in particular relates to a biological treatment method for clarification of sulfur-free cane juice. Background technique [0002] At present, the methods commonly used in the world to produce farmland white sugar include the sulfurous acid method and the carbonic acid method. Both the sulfurous acid method and the carbonic acid method have more or less deficiencies: in the sulfurous acid method, S0 2 Adding as a clarifier will lead to sulfur residues in the finished sugar, which has certain limitations for high-end customers; while the carbonation method requires a large amount of lime, and produces a large amount of strong alkaline filter mud that is difficult to handle, which is not conducive to ecology Environmental protection; this also leads to the reason why the two-step method is usually used in the world to produce high-quality sugar. However, the production process of the...

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Problems solved by technology

[0002] At present, the commonly used methods for producing cultivated land white sugar in the world include the sulfurous acid method and the carbonic acid method. Both the sulfurous acid method and the carbonic acid method have more or less deficiencies: in the sulfurous acid method, S0 2 Adding as a clarifier will lead to sulfur residues in the finished sugar, which has certain limitations in use for high-end customers; while the carbonation method requires a large amount of lime, and produces a large amount of strong alkaline filter mud that is difficult to handle, which is not conducive to ecology Environmentally friendly; this is why the two-step process is commonly used in the world to produce high-quality sugar

Disadvantages: large amount of lime, limited clarification effect, difficult to achieve secondary clarification, high color value

[0005] Chinese Patent (Application No.) 201410088309.0 discloses a sulfur-free clarification method for sugar cane sugar production. The lime method is used for primary precipitation clarification and tannin and calcium bicarbonate reaction for secondary precipitation purification to obtain sulfur-free clear sugar juice. Two steps The temperature of the clarification process is in the boiling state of the sugar juice. Using the factors such as the structure of the sedimentation tank, fluid flow state, particle size, temperature, etc., the settling time of the single-layer fast settler is 30-45min, and the settling time of the multi-layer settler is at 60-75min, two-stage sedimentation process, the total residence time of the sugar juice in the settler is longer (the total residence time is 60-150min), the disadvantage: the conversion of sucrose is more, and the sludge juice of this method is returned to the mixed juice tank , which further increases sugar loss and production energy consumption

Disadvantages: large amount of floating phosphorus is used, the clarification effect is limited, and the proportion of separated floating matter is high

Disadvantages: It has little effect on non-sugar components of medium and large molecules

Disadvantages: the regeneration of nano-micropores is complicated and the work efficiency is low

[0009] The purpose of the present invention is to overcome the low clarification efficiency of the existing sulfite sugar production process widely used in the sugarcane sugar industry, the limited improvement range of the sugar juice purity after treatment (even there is a situation that decreases instead), and the sugar recovery rate is low. Low deficiency, to provide a clarification process in the process of sugar cane sugar production, effectively improve the clarification efficiency of cane juice, improve the purity of clarified juice after clarification treatment, reduce the loss of sugar in the process of processing, and improve the recovery of sugar rate, reduce production cost

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