2nd Gen

Caustic Digester Unit
(CDU)

3rd Gen

Thermal Tissue Digester
(TTD)

Compare PRI Digesters

There are two primary types of tissue digesters, one utilizes Alkaline Hydrolysis to break down the material, while the other includes Thermal and Physical Degradation.

Alkaline Hydrolysis (Gen 2): tissue is placed in a vessel that is then filled with a mixture of water and lye, and heated to a temperature around 160 °C (320 °F), at a high pressure. The tissue is broken down, and bones are collected while the liquid is disposed of as sanitary municipal waste.

Thermal & Physical Degradation (Gen 3): a revolutionary advancement in tissue disposal and sterilization, using agitation and heat to break down tissue (with or without alkali), minimizing water and caustic use in the process. Tissue and bones are broken down and disposed of as liquid through a sanitary sewer or collected as dry discharge for municipal waste.

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Biological Validation By Design

Our Carcass Treatment Systems include design features which allow routine validation of the systems. We understand the importance of a properly functioning biowaste treatment system, and that our users require routine validation. It is for these reasons that all of our biowaste treatment systems have built-in validation design features to allow staff to ensure the process is effective and leads to consistent results, without making the process cumbersome or inconvenient for you.

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Treatment System Criteria

Compare Digesters vs. Other Methods

Facility managers may consider other options such as composting, rendering, or incineration, but none offer the full benefits of a tissue digester. Each method has pro’s and con’s. An effective Carcass Treatment System should adhere to the following core principles:

  • achieve destruction and sterilization
  • operate efficiently within a closed system
  • limit material handling post treatment

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