Sanitary Disc Stack Centrifuge Technology for Continuous Fermentation Broth Clarification

Fermentation broth contains extremely complex mixed components after fermentation reaction. In addition to target bioactive substances such as enzymes, peptides and microbial metabolites, the crude liquid carries a large number of inactive impurities, including bacteria residues, broken cell fragments, residual polysaccharide culture media, denatured protein colloids and fine suspended particles. If these impurities cannot be effectively removed in the early stage, they will cause turbidity of the finished liquid, block subsequent filtration and membrane concentration equipment, reduce product purity, and seriously affect the stability and shelf life of final bio-products.

Traditional fermentation broth purification processes have prominent technical bottlenecks. Static sedimentation requires a long standing cycle and occupies a large number of storage tanks, resulting in low production efficiency and material oxidation loss. Plate-and-frame filtration requires frequent replacement of filter cloths and a large amount of auxiliary filter aids, generating massive solid waste and bringing hidden risks of secondary microbial contamination. Vacuum filtration cannot completely remove tiny colloidal impurities, making subsequent refining difficult and restricting high-value utilization of fermentation products.

Sanitary disc stack centrifuge separation technology has become an upgraded and optimal solution for industrial fermentation liquid pretreatment. Different from traditional filtration modes relying on physical interception, centrifugal separation uses high-speed rotation to generate powerful centrifugal force, rapidly separating high-density cell debris and solid impurities from low-density fermentation supernatant. Multi-layer disc stack structure greatly increases the separation settling area, enabling efficient removal of micro impurities that cannot be trapped by conventional filtration equipment.

The entire clarification process is carried out in a fully sealed sanitary stainless steel cavity with low-shear feeding design, which effectively protects the activity of heat-sensitive and shear-sensitive bioactive ingredients. The equipment supports automatic intermittent slag discharge without shutdown, realizing 24-hour uninterrupted continuous industrial production. Compared with traditional processes, it requires no filter aids, produces no disposable consumable waste, and greatly reduces manual operation and workshop management costs.

In complete bio-fermentation production lines, disc centrifuges are installed at the front end of membrane filtration, concentration and drying processes. After centrifugal clarification, most solid impurities and colloidal pollutants are removed in advance, significantly reducing the operating load and fouling rate of downstream ultrafiltration and nanofiltration membrane systems. It effectively extends membrane service life, stabilizes continuous production efficiency and improves the overall yield of fermentation active ingredients.

This technology is widely applicable to yeast fermentation, enzyme preparation, microbial polysaccharides, amino acid fermentation and various biological liquid purification scenarios. Manufacturers can adopt independent centrifugal clarification or form a combined production process of centrifugal pretreatment + membrane fine filtration according to different product purity requirements. The integrated separation system thoroughly solves common problems such as liquid turbidity, unstable batch quality and easy precipitation of finished products.

Modular sanitary disc stack centrifuges can be customized according to factory daily processing capacity, fermentation liquid impurity content and workshop layout. With stable separation accuracy, fully automatic operation and hygienic design, the equipment provides reliable, green and high-efficiency solid-liquid separation solutions for modern biological and food fermentation industries.