Decolorization Technology

Decolorization refers to the process of removing color from materials and is commonly used in industrial biotechnology, food processing, and many other industries.

The principles of decolorization mainly include various mechanisms such as physical adsorption, chemical reactions, and physical-chemical bonding. The specific method should depends on the properties of the materials to be treated.

SmarSEP can offer the following decolorization methods

1.Membrane Decolorization

• Apply membrane technology, especially nanofiltration membranes, to separate color substances. Membrane separation can selectively retain color substances based on the differences of molecular size and charge.

2. Activated Carbon Decolorization

• Different types of activated carbon are widely used in the market. Most commonly used in industrial biotechnology market are powdered activated carbon (PAC) and granular activated carbon (GAC).

3. Resin Decolorization

• There are two main types of resin used in industrial biotech market, styrene matrices and acrylic matrices. styrene matrices exhibit stronger hydrophobicity, while acrylic and phenolic matrices show better hydrophilicity, which has a significant impact on the decolorization effect. In addition to chemical structure, resins also have some critical porous structures, all of them are important factors affecting resin decolorization efficiency.

The choice of decolorization technology is typically made considering factors such as cost, efficiency, sustainability, and waste disposal. In the industrial biotechnology market, most popular decolorization methods is activated carbon, but ion exchange decolorization systems have been more and more used in last decades.

Advantages of ion exchange decolorization:

1. Selectivity

• Different resins have their inherent selectivity to remove specific types of color substances. This selectivity makes ion exchange decolorization suitable for treating various types of materials.

2. Renewability

• Ion exchange resins can be reused multiple times(typically > 500 cycles) through the regeneration process, which reducing costs and minimizing waste generation. By using appropriate regeneration chemicals to wash away the color substances adsorbed on the resin, the adsorption capacity of the resin can be restored.

3. Efficiency

• Ion exchange resins have a large surface area,high exchange speed and ion exchange capacity, allowing them to efficiently adsorb color substances, resulting in a significant decolorization effect.

4. Environment.

• Ion exchange decolorization processes can be designed as fully automated and closed loop system, easy for continuous operation and ensuring a clean workshop conditions.

It is important to note that ion exchange decolorization is not always the optimal choice for all situations. in specific applications, the choice of decolorization methods needs to consider various factors to determine the most suitable technology.

Typical Applications:

Sugar Refinig (ion exchange decolorization), Leuine/Isoleucine (nanofiltration), Lactic Acid (granular carbon decolorization).

Simplified Sugar Refinery Process