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Application of separating screen in the slaughterhouse


Application of separating screen in the slaughterhouse

In slaughterhouses, the installation of a wedge wire screen solid-liquid separation screen on poultry feathers and viscera processing equipment can reduce water consumption and optimize production and operation efficiency at the same time.

Screening efficiency

When handling poultry feathers, the water carrying the feathers flows through a liquid / solid separation screen which separates the feathers from the water. Feathers are used for extraction, and the water after feather removal is recycled back to the feather picking area for reuse and mixed with supplementary water. It’s a very efficient system for the continuous reuse of this water.

In the visceral treatment area, two liquid / solid separation screens can be installed. One main screen captures all the water flowing out of the decontamination process, and the other one captures the smaller particles of visceral water before it leaves the building and enters our wastewater treatment plant.
The final result of using two screens is that more organic solids are screened out from the wastewater, which not only increases the content of purification but also reduces the number of chemical substances required for wastewater treatment.

After evisceration and internal/external cleaning of the meat, the meat enters the cooler. The selected liquid / solid separation equipment is a single drum screen.
The screen separates meat solids from water by rotation. The water flows into the drum from the inside, and the solid is screened through the main screen, and the solid is screened through the secondary screen. The screen is recommended to be made of stainless steel wedge wire. Triangular wedge wires are less likely to plug than perforated steel plates.


In poultry processing facilities, when poultry fat and other smooth particles block the screen holes, the effective operation of the rotary screen will be reduced.
Many screens allow the material to pass through because they do not have the capacity to manage the volume of particulate matter in the slurry. This is a common problem of traditional screening equipment, which limits the amount of wastewater and the load that can be moved through the screen, resulting in the water and particles passing through without filtration.

Traditional roller screens for poultry processing use spray bars to prevent clogging of the roller surface, which can usually consume a lot of water per minute. However, after using the screen mentioned above, the water consumption is obviously reduced, and the water-saving efficiency is greatly improved.

System efficiency

Due to the long-term operation of liquid / solid separation equipment under strict and harsh conditions, many system designs cannot satisfactorily maintain consistent wastewater flow, particulate matter capture, and normal operation time.
In order for the liquid / solid separation system to effectively capture high levels of primary and secondary viscera while maintaining normal operation time, it must be durable and designed to be easy to use, tool friendly, and machine friendly. And the maintenance cost is low.