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- Dr. Walid H. Shayya
- School of Agriculture & Natural Resources
- Morrisville State College
Last Updated on October 17, 2009
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- The process of filling the north side of the digester was started on the
29th of November and completed in mid December, 2006.
- During the process, half of the collected manure was fed to the north
side of the digester with the remaining half fed to the south side of
the digester that had already produced biogas for at least four weeks.
- The effluent from the south side of the digester was also pumped into
the north side of the digester to provide the inoculant to startup the
anaerobic digestion process as well as fill up the north side of the
digester as quickly as possible.
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- Production of biogas started soon after the two sides of the digester
were filled with effluent from the dairy complex.
- Biogas production became consistent starting from December 17, 2006.
- Flaring the biogas started on December 20, 2006, and went on until the
internal combustion engine(ICE)/generator set was tested on January 9,
2007.
- Flaring the biogas continued until the interconnect with the power grid
was approved and the combined heat and power generation (CHP) system was
authorized to start on February 27, 2007.
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- The system was in operation and consistently generating electrical power
until December 17, 2008.
- Due to a leak in the main heat exchanger located in the grit chamber of
the south side of the digester, hot water was turned off to the south
side of the digester in early December 2008.
- System produced very little power between in December 2008 and the
engine was finally shut down on December 17.
- Fixing the leak could not take place immediately due to several factors
including the location of the leak, the time of year, and the observed
build-up of solids.
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- The leak was fixed by an outside contractor in early April 2009.
- After extensive mixing of solids and liquid in both sides of the
digester, the process of loading the digester with influent started in
late May, 2009.
- The engine was finally started on Jun 13, 2009.
- Biogas production and electricity generation reached pre-leak levels on
June 22, 2009.
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