Technology for refining cane molasses by multistage membrane filtration

A sugarcane molasses and membrane filtration technology, which is applied in the production of sucrose, sugar production, and juice purification, etc., can solve the problems of inability to remove and utilize reducing sugar in molasses, reduce molasses generation, and complex components, and achieve high Value utilization, avoid generation and accumulation, reduce production costs

Pending Publication Date: 2017-12-05
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

CN105063247A uses ultrafiltration and nanofiltration membranes to decolorize sugarcane mixed juice and remove reducing sugar to reduce the color value of sugarcane mixed juice and improve its purity, reducing the generation of molasses; there are also activated carbon, microfiltration membranes or ion exchange resins for molasses To clarify the report of decolorization and refining, however, due to the complex composition of molasses, the removal and utilization of reducing sugar in molasses cannot be achieved

Method used

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  • Technology for refining cane molasses by multistage membrane filtration
  • Technology for refining cane molasses by multistage membrane filtration
  • Technology for refining cane molasses by multistage membrane filtration

Examples

Experimental program
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Effect test

Embodiment 1

[0051] First pump 100kg of waste molasses into the buffer tank, add 100kg of pure water, heat and mix well, add food-grade sodium hydroxide to adjust the pH to 7.2, and then remove the suspended solids through a high-speed centrifuge and enter the ultrafiltration decolorization system. The ultrafiltration membrane module is Polyamide / polysulfone spiral membrane module, molecular weight cut-off is 1000Da, operating temperature is 65°C, pressure is 1.5MPa, after concentrating twice, continue to add 500kg of washing water to the ultrafiltration membrane module to obtain 600kg of decolorized and clarified ultrafiltration The permeate enters the anion-cation exchange resin mixed bed to continue decolorization and desalination. The diluted molasses after decolorization and desalination enters the nanofiltration membrane module for concentration. 65°C, pressure 3MPa, concentrated 2 times to get 300kg of nanofiltration concentrated liquid into the crystallization tank, 300kg of nanofil...

Embodiment 2

[0057] First, pump 100kg of molasses into the buffer tank, add 300kg of pure water, heat and mix, add food grade sodium hydroxide to adjust the pH to 7.2, and then remove the suspended solids through a high-speed centrifuge and enter the ultrafiltration decolorization system. Chemicalized polyethersulfone roll-type membrane module with a molecular weight cut-off of 2000Da, an operating temperature of 60°C and a pressure of 1MPa. After concentrating for 4 times, continue to add 300kg of wash water to the ultrafiltration membrane module to obtain 600kg of decolorized ultrafiltration permeate Enter the anion-cation exchange resin mixed bed to continue decolorization and desalination. The diluted molasses after decolorization and desalination enters the nanofiltration membrane module for concentration. Pressure 4MPa, concentrated 3 times to get 200kg of nanofiltration concentrated liquid into the crystallization tank, 400kg of nanofiltration permeate into the reverse osmosis membra...

Embodiment 3

[0060] First, pump 100kg of molasses into the buffer tank, add 600kg of pure water, heat and mix well, add food-grade sodium hydroxide to adjust the pH to 7.2, and then remove the suspended solids through a high-speed centrifuge and enter the ultrafiltration decolorization system. Chemicalized polyethersulfone roll-type membrane module, with a molecular weight cut-off of 5000Da, an operating temperature of 50°C, and a pressure of 1MPa. After concentration of 7 times, 600kg of decolorized ultrafiltration permeate is obtained and enters an anion-cation exchange resin mixed bed for further decolorization and desalination. The diluted molasses after decolorization and desalination enters the nanofiltration membrane module for concentration. The nanofiltration membrane module is a polyamide roll-type membrane module with a molecular weight cut-off of 400Da, an operating temperature of 65°C, and a pressure of 4MPa. After concentration of 4 times, 150kg of nanofiltration concentrate is...

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Abstract

The invention relates to a technology for refining cane molasses by multistage membrane filtration, comprising the following steps: decolouring clarification treatment is firstly carried out on molasses obtained after dilution and centrifugation by the use of an ultrafiltration membrane; an ultrafiltration concentrate is used for natural pigment extraction; an ultrafiltration permeate undergoes further decolouring and desalting through ion exchange resin and then enters a nanofiltration membrane system; after concentration and removal of impurities through the nanofiltration membrane, a nanofiltration concentrate continues to be recycled for crystallization and sugar production; a nanofiltration permeate undergoes reverse osmosis membrane concentration; a reverse osmosis concentrate is used for preparation of a functional sugary beverage; and a reverse osmosis permeate is used for dilution and filter wash of molasses during ultrafiltration membrane treatment process. By the technology provided by the invention, recycling and high-value utilization of molasses can be realized. The equipment is simple and is easy for continuous and automatic production. There is no chemical additive, and generation of waste molasses can be avoided.

Description

technical field [0001] The invention belongs to the technical field of refined molasses, and in particular relates to a process for refining sugarcane molasses by using multistage membrane filtration. Background technique [0002] Cane sugar molasses is a dark brown, viscous by-product produced by a sugar factory using sugar cane as raw material after pressing, clarification and purification of cane juice, filtration, evaporation and concentration, and crystallization of sugar. It is commonly known as orange juice. The yield of sucrose molasses is 2.5-3.0% of the raw material sugar cane, containing water, sugar, pigment, inorganic salt and other components, the total sugar content is about 50%, and the sugar hammer is greater than 60%. The sugars are mainly sucrose, glucose and fructose. [0003] Sucrose molasses is a widely used raw material, which can be used in chemical industry, light industry, food, medicine and building materials and other industries. Most of them ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C13B20/16
CPCC13B20/165
Inventor 罗建泉万印华杭晓风陈向荣曹伟锋
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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