Sanitary Disc Stack Centrifuge for Botanical Extract Pretreatment and Impurity Removal

Plant extract production relies on water or ethanol leaching to obtain functional active ingredients from herbs, fruits and agricultural raw materials. The freshly obtained crude extract inevitably contains fine plant fibers, cell debris, insoluble starch, pectin colloids and tiny suspended particles. These complex impurities are difficult to eliminate through conventional filtration methods. If retained in the feed liquid, they will cause turbidity and precipitation of finished products, block downstream membrane systems, reduce production efficiency, and affect the color, purity and stability of plant functional ingredients.

Traditional pretreatment processes have obvious limitations. Natural sedimentation requires long standing time and occupies multiple intermediate tanks, leading to low production efficiency and increased risk of raw liquid oxidation. Bag filtration and plate-frame filtration can only remove large particles but cannot intercept micro colloids, which easily cause membrane blockage in the subsequent ultrafiltration and nanofiltration process. In addition, disposable filter consumables generate large production waste, increase operating costs and cannot support continuous industrial-scale production.

Sanitary disc stack centrifugal separation technology perfectly solves the above industry pain points. Under high-speed rotation, the equipment generates powerful centrifugal force to rapidly separate high-density solid residues and colloidal impurities from low-density extract liquid. The multi-layer disc stack structure greatly expands the separation area, achieving precise removal of micro impurities that traditional filtration cannot handle. The fully enclosed low-temperature operation environment effectively protects heat-sensitive active substances and avoids loss of botanical flavonoids, polyphenols and glycosides.

This centrifuge supports automatic intermittent slag discharge without shutdown, realizing 24-hour continuous and stable production. Compared with traditional processes, it eliminates the need for filter aids and disposable filter materials, reduces solid waste discharge and greatly lowers labor and maintenance costs. After centrifugal pretreatment, the supernatant liquid is clear and stable, with over 95% of solid impurities removed, which fundamentally reduces the fouling load of downstream membrane concentration systems and significantly extends membrane service life.

In standardized plant extract production lines, the disc stack centrifuge is installed immediately after leaching and coarse filtration. It serves as the core pretreatment procedure to purify crude extract liquid, providing stable and qualified feed liquid for subsequent membrane decolorization, desalination and low-temperature concentration. Enterprises can flexibly adopt independent centrifugal clarification or form a combined process of centrifugal pretreatment + membrane fine purification according to different raw material characteristics and product standards.

Widely applicable to herbal extracts, tea polyphenol liquid, fruit botanical liquid and grain fermentation extracts, the sanitary disc stack centrifuge delivers stable clarification effect, consistent batch quality and excellent production continuity. It is an essential upgrading device for high-standard, low-consumption and green modern plant deep-processing factories.