Horizontal Decanter Centrifuge for Food Fermentation Waste Liquid Protein Recovery

Food fermentation industries including starch fermentation, organic acid fermentation and microbial enzyme production produce massive industrial waste liquid every day. The waste liquid contains abundant recyclable resources such as residual microbial protein, unfermented starch, organic suspended solids and fine biological sediments. Traditional treatment methods such as natural sedimentation and flocculation filtration can only simply settle pollutants, failing to effectively recover high-value protein substances. A large number of usable organic resources are wasted with wastewater, while organic sediments accumulate continuously, increasing biochemical treatment pressure and overall operating costs of sewage stations.

Different from disc centrifuges suitable for fine clarification, horizontal decanter centrifuges are designed for high-load, high-solid-content material separation. Relying on the principle of centrifugal sedimentation, the high-speed rotating drum generates strong centrifugal force. High-density solid organic particles and protein sediments are rapidly settled on the inner wall of the drum, while low-density clear liquid flows out stably. The built-in differential screw conveyor continuously pushes solid sediments out of the machine without shutdown, realizing uninterrupted industrial continuous separation.

The whole separation process adopts low-shear, fully enclosed sanitary design, which avoids material overflow, odor volatilization and secondary pollution. It effectively intercepts and concentrates residual microbial protein and organic solids in fermentation waste liquid. The recovered crude protein sediment can be further processed into feed protein raw materials, realizing waste resource utilization and creating additional economic benefits for enterprises. After centrifugal separation, the clarified wastewater has significantly reduced COD and solid content, greatly reducing the treatment burden of subsequent biochemical sewage systems.

Compared with traditional sedimentation tanks and filter equipment, the horizontal decanter centrifuge has outstanding advantages of large single-machine processing capacity, small floor space and fully automatic operation. It requires no filter aids or disposable filter consumables, effectively reducing production waste and daily maintenance costs. The adjustable rotating speed and differential speed enable flexible adaptation to waste liquid with different solid content and protein concentration, ensuring stable separation efficiency under different working conditions.

This equipment is widely applied in yeast fermentation waste liquid treatment, starch sugar wastewater recovery, food processing organic sewage separation and microbial protein recycling projects. It can be used independently for wastewater pretreatment or matched with membrane systems to form a complete waste liquid resource recovery production line. While realizing clean discharge, it maximizes the recovery rate of organic resources, helping food factories reduce sewage discharge fees and obtain additional resource benefits.

With the increasingly strict global environmental protection policies and the popularization of green circular economy models, resource recovery centrifugal equipment has become standard supporting equipment for large-scale food fermentation factories. The horizontal decanter centrifuge perfectly solves the problems of low resource utilization rate and high sewage treatment cost in traditional fermentation waste liquid treatment, providing reliable low-carbon and efficient solutions for food industrial upgrading.