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Continuous Thermochemical Conversion Process to Produce Oil from Swine Manure

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  034124,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.13880) @2003
Authors:   Kim Carlo S. Ocfemia, Yuanhui Zhang, Ted Funk
Keywords:   swine manure, thermochemical conversion, waste treatment

Thermochemical conversion of livestock waste is a novel technology that has shown very promising results in treating waste and producing oil. A batch TCC system that was previously developed was shown to have successfully converted up to 70% of swine manure solids to oil and reduced manure chemical oxygen demand by up to 75%. Since a continuous-mode system is more applicable for scale-up operations, a bench-scale continuous thermochemical conversion system was designed and built to evaluate the technical feasibility and economical viability of a pilot plant that is capable of producing oil from swine manure. The system was designed to operate at 305C and 10.3MPa based on the optimal process conditions derived from the batch-process study. The main components of the system are: a manure pre-processor, a low-flow rate high-pressure slurry feeder, a process gas feeding system, a high-temperature high-pressure reactor, gas and liquid products separation vessel, and process controllers. The bench-scale unit has a capacity to process up to 3.6 kg of raw manure per hour.

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