Journal article
Biogas potential and microbial population distributions in flushed dairy manure and implications on anaerobic digestion technology
Journal of chemical technology and biotechnology (1986), Vol.86(1), pp.145-152
01/2011
Handle:
https://hdl.handle.net/2376/118067
Abstract
BACKGROUND: There remain technological deficiencies in the economical anaerobic digestion of the entire flow of flushed dairy manure on farms within cold climates. In order to develop an anaerobic digester tailored for this purpose, this study investigated the distributions of biomass and biogas generated in three particle-size-characterized zones of flushed dairy manure.
RESULTS: Results demonstrate that comparable biogas generations are equally distributed between the solids and liquid phases of flushed dairy manure, implying that at least 50% of methane generation might be lost when utilizing existing processes that only selectively handle the liquid or solids phases. Microscopic and kinetic studies show that the majority of microorganisms in the manure are attached to the surface of undigested dairy manure fibrous solids. In particular, greater than 70% of acetate-utilizing methanogens were found closely associated with the indigestible solids. This high microbial affinity to the dairy manure solids phase can be traced back to the selection pressure driven bacterial immobilization mechanism in cattle rumen.
CONCLUSION: This study shows that dairy manure fibrous solids have the potential to act as effective natural biomass carriers for high rate and simultaneous methanation of both solids and liquid phases of flushed dairy manure in one digester. Copyright © 2010 Society of Chemical Industry
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Details
- Title
- Biogas potential and microbial population distributions in flushed dairy manure and implications on anaerobic digestion technology
- Creators
- Craig Frear - Department of Biological Systems Engineering, Washington State University, P.O. Box 646120, Pullman, WA 99164-6120, USAZhi-Wu Wang - Bioscience Division, Oak Ridge National Laboratory, P.O Box 2008, Oak Ridge, TN 37831-6445, USAChenlin Li - Deconstruction Division, Joint Bioenergy Institute, 5885 Hollis St, Emeryville CA 94608, USAShulin Chen - Department of Biological Systems Engineering, Washington State University, P.O. Box 646120, Pullman, WA 99164-6120, USA
- Publication Details
- Journal of chemical technology and biotechnology (1986), Vol.86(1), pp.145-152
- Academic Unit
- Biological Systems Engineering, Department of
- Publisher
- John Wiley & Sons, Ltd
- Number of pages
- 8
- Identifiers
- 99900583057601842
- Language
- English
- Resource Type
- Journal article