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Enhancing the performance of anaerobic digestion of dairy manure through phase-separation
Date
2008-09-01
Author
Yilmaz, Vedat
Demirer, Göksel Niyazi
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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Anaerobic digestion (AD) is an effective way to convert animal manures into profitable by-products while simultaneously reducing, the pollution of water, air, and soil caused by these wastes. Conventional high-rate anaerobic reactors cannot effectively process animal manures with high solids-containing wastes. The two-phase configuration for AD has several advantages over conventional one-phase processes, e.g., increased stability of the process, smaller size and cost efficient process configurations. In the present study, the experiments were carried out in a two-phase system composed of an acidogenic reactor and a methanogenic reactor, and in a one-phase system composed of only a methanogenic reactor. The reactors were operated as unmixed (without an external mixing aid), unsophisticated, and daily-fed mode. It was found that the two-phase configuration was more efficient than the one-phase system. The biogas production in the two-phase system at a hydraulic retention time (HRT) of 8.6 days (only methanogenic phase) was calculated to be 42% higher at an organic loading rate (OLR) of 3.5 g VS/L . day than that of the one-phase with a HRT of 20 days. This translates into significant performance improvement and reduced volume requirement. This finding represents a further step in the achievement of wider use of simple anaerobic reactor configurations for waste treatment in rural areas.
Subject Keywords
Pollution
,
Water Science and Technology
,
Environmental Chemistry
URI
https://hdl.handle.net/11511/57270
Journal
CLEAN-SOIL AIR WATER
DOI
https://doi.org/10.1002/clen.200800024
Collections
Department of Environmental Engineering, Article
Citation Formats
IEEE
ACM
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MLA
BibTeX
V. Yilmaz and G. N. Demirer, “Enhancing the performance of anaerobic digestion of dairy manure through phase-separation,”
CLEAN-SOIL AIR WATER
, vol. 36, no. 9, pp. 760–766, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57270.