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System and treatment method of graded recovery of pigments and sugar from molasses

A technology for molasses and pigments, which is applied in the system of graded recovery of pigments and sugars in molasses and its treatment field, which can solve the problems of pollution, increase of osmotic pressure, waste of washing and filtering water, etc., and achieve the effect of avoiding a large amount of high-salt wastewater and reducing the load

Inactive Publication Date: 2018-09-28
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this process has the following three problems in practical application: (1) there are some colloidal suspensions in the sugarcane molasses, which are difficult to remove by centrifugation, which will affect the quality of the pigment extracted from the ultrafiltration concentrate; (2) in the molasses The non-polar pigments are easily adsorbed on the surface of the ultrafiltration membrane, forming membrane fouling, reducing the membrane flux and reducing the permeability of sucrose (increasing osmotic pressure, wasting washing water); (3) the ultrafiltration permeate contains a large amount of Small molecule pigments and high-valent salt ions, the subsequent ion exchange resin treatment load is heavy, and the amount of acid-base eluent is large, resulting in a large amount of high-salt wastewater
These problems will increase the cost of molasses refining and reduce the added value of its products

Method used

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  • System and treatment method of graded recovery of pigments and sugar from molasses

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0102] Present embodiment provides a kind of system of graded recovery pigment and sugar in molasses, such as figure 1 As shown, the system includes sequentially connected dilution device 7, separation device 8, microfiltration membrane treatment device 1, non-polar resin adsorption device 2, ultrafiltration membrane treatment device 3, nanofiltration treatment device 4, desalination device 5 And reverse osmosis treatment device 6; Described system also comprises drying unit 9, and drying unit 9 is connected with the concentrated solution outlet of ultrafiltration membrane treatment unit 3; The washing water inlet of the ultrafiltration membrane treatment device 3 is connected;

[0103] Among them, the separation device 8 is a centrifuge, the microfiltration membrane module used in the microfiltration membrane treatment device 1 is a polyvinylidene fluoride tubular membrane module with a pore size of 0.1 μm, and the resin used in the nonpolar resin adsorption device 2 is macro...

Embodiment 2

[0110]The present embodiment provides a system for graded recovery of pigments and sugars in molasses. The system refers to the system in Example 1, the only difference being:

[0111] The microfiltration membrane module used in the microfiltration membrane treatment device is a polyethersulfone coiled membrane module with a pore size of 0.01 μm, and the resin used in the non-polar resin adsorption device is macroporous styrene resin; the ultrafiltration membrane used in the ultrafiltration membrane treatment device The filter membrane module is a polyamide roll-type membrane module with a molecular weight cut-off of 500Da; the nanofiltration membrane module used in the nanofiltration treatment device is a polyamide roll-type membrane module with a molecular weight cut-off of 300Da; the reverse osmosis membrane module used in the reverse osmosis treatment device It is a polyamide spiral membrane module, and the standard desalination rate of sodium chloride is 99.0%.

[0112] T...

Embodiment 3

[0118] The present embodiment provides a system for graded recovery of pigments and sugars in molasses. The system refers to the system in Example 1, the only difference being:

[0119] The microfiltration membrane module used in the microfiltration membrane treatment device is a zirconia tubular membrane module with a pore size of 0.05 μm, and the resin used in the non-polar resin adsorption device is macroporous styrene resin; the ultrafiltration membrane used in the ultrafiltration membrane treatment device The membrane module is a polyamide coiled membrane module with a molecular weight cut-off of 1000Da; the nanofiltration membrane module used in the nanofiltration treatment device is a polyamide coiled membrane module with a molecular weight cut-off of 200Da; the reverse osmosis membrane module used in the reverse osmosis treatment device is Polyamide spiral membrane module, the standard desalination rate of sodium chloride is 99.8%.

[0120] The processing method of the...

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Abstract

The invention provides a system and a treatment method of graded recovery of pigments and sugar from molasses. The system comprises a microfiltration membrane treatment device, a nonpolar resin adsorption device, an ultrafiltration membrane treatment device, a nanofiltration treatment device, a demineralizing device and a reverse osmosis treatment device that are sequentially connected. The treatment method comprises the steps of sequentially performing microfiltration membrane treatment, nonpolar resin adsorption, ultrafiltration membrane treatment, nanofiltration treatment, demineralizing treatment and reverse osmosis treatment on the molasses separated by dilution. A technology can achieve recycling and high value utilization of the molasses; high-salt wastewater generated by resin regeneration is reduced; the pollution of an ultrafiltration membrane is avoided; sucrose transmittance is increased; and therefore, the molasses treatment cost by a membrane method is lowered.

Description

technical field [0001] The invention belongs to the technical field of refined molasses, and relates to a system for graded recovery of pigment and sugar in molasses and a processing method thereof. Background technique [0002] Molasses is a by-product of the sugar making process and is rich in reducing substances such as sugars. Sugarcane molasses is a dark brown, viscous by-product produced after pressing, clarifying and purifying cane juice, filtering, evaporating and concentrating, and crystallizing sugar from sugarcane, commonly known as orange juice. The yield of sugarcane molasses is 2.5wt%-3.0% of the raw material sugarcane, the total sugar content is about 50wt%, and the sugar hammer is greater than 60%. The sugars are mainly sucrose, glucose and fructose. In addition, sugarcane molasses also contains a large amount of inorganic salts and various pigments, such as flavonoid pigments, phenolic pigments, Maillard pigments and caramel pigments. Sugarcane molasses i...

Claims

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Application Information

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IPC IPC(8): C13B20/16C13B20/12
CPCC13B20/126C13B20/165
Inventor 罗建泉万印华
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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