Effect of temperature on survival of micro-organisms and performance of anaerobic two-stage reactors treating cattle slurry.
A short-term thermophilic treatment was conducted in order to study the survival of micro-organisms in slurry derived from a cattle farm, at temperatures of 58, 63 and 68 degrees C for 6 h. The second trial was a biogas production experiment with an anaerobic mesophilic first stage and a thermophilic second stage. The mesophilic treatment was at 38 degrees C and the second stage was conducted at 55, 58 or 65 degrees C. The results of first trial showed that survival of micro-organisms was decreased remarkably at higher temperatures in spite of the fact that during the experiment part of slurry was replaced with fresh slurry. Meanwhile, the second trial showed that optimum production ofbiogas was at 55 degrees C while the best result for hygienic control was achieved at 65 degrees C.
Department of Environmental Science, University of Eastern Finland, P.O. Box 1627, FIN-70211 Kuopio, Finland. mohammed.mohaibes@uef.fi
Mohammed
M
Mohaibes
Helvi
H
Heinonen-Tanski
D000818:Animals; D001421:Bacteria, Anaerobic / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology*; D002417:Cattle / Q000382:microbiology*; D002470:Cell Survival; D003198:Computer Simulation; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005243:Feces / Q000382:microbiology*; D008697:Methane / Q000378:metabolism*; D008954:Models, Biological; D012037:Refuse Disposal / Q000379:methods*; D012722:Sewage / Q000382:microbiology*
D012722:Sewage; D008697:Methane