In today's rapidly advancing bioprocessing industry, the purity of organic acid products directly determines their application value in downstream sectors such as food, pharmaceuticals, and chemical industries. Efficient separation and purification of organic acids from fermentation broth is a key step in enhancing product quality.

"Zhengguang" has been deeply rooted in the fermentation industry for more than 20 years, accumulating profound technical expertise and extensive industrial application experience. The company has customized a series of specialized resin products for organic acid fermentation applications, establishing a comprehensive technical system that covers the entire process from decolorization and impurity removal to purification and chromatographic separation, providing reliable solutions for high-quality industry development.

 

Lysine Adsorption Device

1. Impurity removal and purification—cation

Zhenguang 001×7FD and ZGC108L cation resins for the food industry are well-established in applications involving organic acids such as citric acid, tartaric acid, and lactic acid, as well as in the purification of amino acids and lysine. The resin's active functional groups readily exchange with other cations, and its affinity for metal cations increases with rising ionic charge. Thanks to its high exchange capacity and excellent selectivity, it achieves efficient impurity removal.

 

 Zhengguang ZGC650L uniform particle resin image

 

2.Purification of impurities - anions

 Zhengguang J-18 and D630 macroporous anion exchange resins for the food industry feature a special pore structure and structure design, offering high exchange capacity and excellent resistance to organic contamination. They enable high-precision impurity removal without compromising the activity or flavor of target organic acids. Primarily used to remove anions such as chloride and sulfate ions, these resins significantly improve product purity. In industrial purification processes for organic acids like citric acid, tartaric acid, lactic acid, and vitamin C, weakly basic anion resins selectively adsorb strongly acidic anionic impurities while retaining the desired organic acid anions, ensuring final product purity meets food-grade standards.

 

Zhengguang J-18 resin image

 

3.Decolorization refining

For the decolorization and purification of fermented liquid, Zhengguang SD300 features a larger specific surface area and pore size, enabling rapid adsorption of organic molecules in the solution with an adsorption rate exceeding 90%, as well as a desorption rate above 95%. This significantly reduces water consumption and wastewater volume during production, making it highly suitable for decolorizing lactic acid, citric acid, malic acid, and other substances. It effectively enhances transparency and taste in further processing, delivering excellent application performance.

 

Zhengguang SD300 resin image

 

4.chromatographic separation

ZGSPC 106H cationic chromatographic resin, ZGSPA 412 anionic chromatographic resin, and SD-19 macroporous adsorption chromatographic resin feature uniform particle size and appropriate particle size range, which are beneficial for chromatographic separation processes and are used in SMB chromatographic systems for organic acid separation. These resins offer high purity, extremely low impurity content, high transformation efficiency, stable performance, and excellent adaptability to various operating conditions.

 

Zhengguang ZG SPC106H chromatographic resin microscope image

 

Zhengguang resin employs a unique pore-forming technology and optimizes functional groups based on the molecular characteristics of organic acids such as lactic acid and citric acid, as well as amino acids, significantly enhancing adsorption capacity and selectivity. Additionally, the resin features distinctive advantages in strength and particle size distribution, meeting the specific requirements of continuous ion exchange processes. It enables full-process continuity—including adsorption, elution, and regeneration—greatly improving production efficiency and earning high praise from customers.