Gewählte Publikation:
Effenberger, M; Bachmaier, J; Garc s, G; Gronauer, A; Wilderer, PA; Lebuhn, M.
(2006):
Mesophilic-thermophilic-mesophilic anaerobic digestion of liquid dairy cattle manure.
Water Sci Technol. 2006; 53(8):253-261
FullText
FullText_BOKU
- Abstract:
- The potential of a mesophilic-thermophilic-mesophilic anaerobic digestion system was investigated with respect to improvement of both digestion and sanitation efficiencies during treatment of liquid cattle manure. The pilot plant produced a high methane yield from liquid dairy cattle manure of 0.24 m(3) (kg VSfed)(-1). Considering the low system loading rate of 1.4-1.5 kg VS (m(3) d)(-1), digestion efficiency compared to conventional processes did not appear improved. The minimum guaranteed retention time in the tubular thermophilic reactor was increased compared to a continuously stirred tank reactor. Levels of intestinal enterococci in raw liquid manure as determined with cultivation methods were reduced by 2.5-3 log units to a level of around 10(2) cfu/mL. This sanitizing effect was achieved both during mesophilic-thermophilic-mesophilic and thermophilic-mesophilic treatment, provided the thermophilic digester was operated at 53-55 degrees C. A change in feeding interval from 1 h to 4 h did not significantly alter methane yield and sanitation efficiency. It was proposed that a two-stage, thermophilic-mesophilic anaerobic digestion system would be able to achieve the same sanitizing effect and equal or better digestion efficiency at lower costs.
- Autor*innen der BOKU Wien:
-
Gronauer Andreas
- BOKU Gendermonitor:
- Find related publications in this database (using NML MeSH Indexing)
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Animals -
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Bacteria, Anaerobic - metabolism
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Biodegradation, Environmental -
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Cattle -
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Enterobacteriaceae - isolation & purification
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Kinetics -
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Manure - microbiology
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Methane - biosynthesis
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Sanitary Engineering -
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Waste Disposal, Fluid - economics
- Find related publications in this database (Keywords)
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cattle manure
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mesophilic anaerobic digestion
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pilot plant
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sanitation
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thermophilic anaerobic digestion
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