Descrizione
An experiment was set-up in order to assess the difference in odour and ammonia emissions from three types of cattle slurry: two coming from farms with different types of housing systems and one from a farm with an anaerobic digestion plant. The aim was to assess whether the anaerobic digestion process, besides its unquestionable energy benefits, is effective in reducing odour and other gases emissions of the effluent at the end of the treatment, the so-called digestate.The tests were carried out in laboratory conditions, simulating storage conditions similar to those in the farm storage tanks. Measurements were taken on eight sampling occasions with four replicates per each slurry type. Results show that the odour emissions from the digested slurry are greatly reduced in comparison with both the undigested slurries, but, on the contrary, ammonia emissions are increased.
