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Effect of sewage sludge addition on the startup of the anaerobic digestion of OFMSW
Date
1998-08-01
Author
Demirekler, E
Anderson, GK
Metadata
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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The performances and stabilities of three laboratory-scale semi-batch anaerobic digesters, operated at 35 degrees C, treating organic fraction of municipal solid waste (OFMSW) and primary sewage sludge (PSS) mixed at various ratios were compared during the start-up period. The OFMSW:PSS ratios in the feeds to the three digesters were 100:0, 80:20, and 60:40 on a total solids (TS) basis and their organic loading rates (OLR) were 5.2 kg VS m(-3) d(-1), 3.9 kg VS m(-3) d(-1), and 3.2 kg VS m(-3) d(-1), respectively. There were no indications of failure in any of the digesters. However, addition of primary sewage sludge significantly decreased the imbalances observed during the start-up and improved the process performance. The best performance in terms of specific gas production rate (SGPR) was obtained with a feedstock having an OFMSW:PSS ratio of 80:20. The use of inoculum from an operating anaerobic digester enabled a quick start-up and the reactors were capable of handling high OLRs from the beginning of the experiment.
Subject Keywords
Anaerobic digestion
,
Start-up
,
Stability
,
Sewage sludge
,
Performance
,
Organic fraction of municipal solid waste
URI
https://hdl.handle.net/11511/64633
Journal
ENVIRONMENTAL TECHNOLOGY
DOI
https://doi.org/10.1080/09593331908616740
Collections
Department of Environmental Engineering, Article