Abstract:
:An extensive investigation of anaerobic methane fermentation requires identifying the relationship between the physical environment and biological process. In this study, a computational fluid dynamics (CFD) technique was used to characterize bacterial fermentation mechanisms intertwined with mixing and heat transfer in anaerobic digesters. The results demonstrate that the methane yield remains almost unchanged while the energy efficiency decreases with increasing mixing power in a complete-mix digester, and that the energy output increases nonlinearly with the increase in heating energy in a plug-flow digester. The CFD method can be applied to other bioreactors to gain valuable insights into their behavior as well. Integrating flow and temperature with kinetic behavior for anaerobic digestion not only solves the controversy about how mixing influences the digestive process, but also assists in optimizing the digester design and increasing the efficiency of energy conversion, and additionally, provides a reference for improving the mixing guidelines recommended by the U.S. Environmental Protection Agency.
journal_name
Biotechnol Bioengjournal_title
Biotechnology and bioengineeringauthors
Wu Bdoi
10.1002/bit.24551subject
Has Abstractpub_date
2012-11-01 00:00:00pages
2864-74issue
11eissn
0006-3592issn
1097-0290journal_volume
109pub_type
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