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Screw press separators can divide a single by-product stream into a solid and liquid stream to improve handling and management. These processing systems are commonly used in manure handling systems but can be used for management of many organic streams. For example, a wet digestion system that accepts food waste may also integrate the technology following anaerobic digestion. Regardless of the application, screw press separators are more efficient in removing solids from manure slurry streams (greater than four percent total solids or dry matter content) than with more dilute liquid manure streams. The systems are known to improve manure handling as well as reduce environmental impacts of livestock systems.

A pdf version of this publication is available from The Learning Store, Division of Extension, University of Wisconsin-Madison.


Associate Professor, Biological Systems Engineering
University of Wisconsin-Madison
Associate Scientist, Biological Systems Engineering
University of Wisconsin-Madison
Extension Specialist, Biological and Agricultural Engineering
North Carolina State University
Asistant Professor, Soil and Crop Sciences
University of Wisconsin–Platteville
Assistant Professor, Biological and Agricultural Engineering
Texas A&M University
Assistant Professor, Soil and Water Systems
University of Idaho

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Publication date: Jan. 10, 2021

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