1. Sugar decolorization
Sugar decolorization mainly refers to the treatment of raw sugar or syrup to remove pigments and impurities and improve its color and purity. The basic steps are as follows:
a. Material preparation
Raw materials: the required raw sugar or syrup.
Activated carbon: Select activated carbon that meets food grade standards, usually coconut shell or wood-based activated carbon.
b. Adsorption treatment
Add activated carbon to syrup. Usually, it needs to be mixed for a period of time to ensure that the activated carbon is fully in contact with the sugar solution.
Promote the contact between activated carbon and syrup through vibration or stirring to improve the decolorization effect.
c. Filtration
The treated syrup is filtered through a filter or filter cloth to remove the activated carbon and its adsorbed impurities and pigments.
As needed, multiple filtrations may be performed to achieve the desired decolorization effect.
d. Post-processing
After filtration, the syrup may need to be subjected to subsequent treatment (such as concentration, etc.) to obtain the final product.
2. Oil decolorization
Oil decolorization refers to the removal of undesirable pigments and impurities in oil through activated carbon to improve the appearance and quality of the oil. The basic steps of oil decolorization are as follows:
a. Material preparation
Raw materials: edible oil to be treated (such as vegetable oil, animal oil, etc.).
Activated carbon: select food-grade activated carbon with high specific surface area and good adsorption performance.
b. Heating and mixing
It is often necessary to heat the oil to a certain temperature (such as 60-80℃) to improve the adsorption capacity of activated carbon to pigments.
The hot oil is fully mixed with activated carbon, and it is usually necessary to stir for a certain period of time to ensure that the activated carbon is fully in contact with the oil.
c. Filtration
Filter the oil through a filter cloth or filter to remove the activated carbon and its adsorbed pigments.
The filtration process can use gravity filtration, vacuum filtration and other methods to improve efficiency.
d. Quality inspection
After the treatment is completed, quality inspection may be required to ensure that the decolorization effect meets the requirements.
Notes
Selection of activated carbon: Different types of activated carbon have different adsorption capacities for different substances, and it is important to choose the right type.
Control the dosage: Excessive activated carbon may cause unnecessary adsorption of ingredients, affecting the flavor or characteristics of the final product.
Monitoring the effect: The decolorization effect is monitored by sampling and analysis to determine whether the treatment needs to be repeated.
Through the above steps, the effect of activated carbon used for sugar decolorization and oil decolorization can usually significantly improve the appearance and quality of the product to meet market requirements.
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