Effect of swine manure source and storage time on bio-crude oil conversion using hydrothermal process

Zhichao Wang, Yuanhui Zhang, Leslie Christianson, Ted Funk, Mitchell Minarick, Rong Dong, Guo Yu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Fresh and pit swine manures with different storage time were used as feedstock to investigate the effects of manure type and storage time on bio-crude conversion rates using a hydrothermal process. Both fresh and pit manures had been converted to bio-crude with refined oil yields of 32-42% (dry mass) of the total feedstock (∼ 60-70% raw oil yield). The refined oil is the toluene soluble portion of the raw oil. The testing conditions were 305°C, with an initial solid content of 20% wt, a retention time of 30 min, an initial N2 gas pressure of 0.65 MPa, and without catalysts or additives. Length of manure storage time in pit did not significantly affect the bio-oil formation compared to that of fresh manure, if the volatile solids contents were relatively similar. Manures from nursery, grower-finisher and sow pigs were tested, and statistical analysis showed that there were no significant differences of bio-oil yield for these different types of manures. A strong linear relationship was found between the refined oil yield and the sum of crude protein and crude fat contents in the feedstock. This indicates that the crude protein and crude fat are critical elements, although probably not the only two, causing bio-crude oil formation in the hydrothermal process.

Original languageEnglish (US)
Title of host publicationAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2009, ASABE 2009
Pages4462-4473
Number of pages12
StatePublished - Dec 1 2009
Externally publishedYes
EventAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2009 - Reno, NV, United States
Duration: Jun 21 2009Jun 24 2009

Publication series

NameAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2009, ASABE 2009
Volume7

Other

OtherAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2009
CountryUnited States
CityReno, NV
Period6/21/096/24/09

Keywords

  • Bio-oil
  • Hydrothermal process
  • Renewable energy
  • Swine manure

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

Fingerprint Dive into the research topics of 'Effect of swine manure source and storage time on bio-crude oil conversion using hydrothermal process'. Together they form a unique fingerprint.

Cite this