Improved mini-silo for studying fermentation of silage in laboratory conditions
2011
Palić, D., Institute for Food Technology, Novi Sad (Serbia) | Vukmirović, Đ., Institute for Food Technology, Novi Sad (Serbia) | Čolović, R., Institute for Food Technology, Novi Sad (Serbia) | Ivanov, D., Institute for Food Technology, Novi Sad (Serbia) | Kokić, B., Institute for Food Technology, Novi Sad (Serbia) | Spasevski, N., Institute for Food Technology, Novi Sad (Serbia) | Jeremić, D., Agri Austria GnbH [and] KG, Brunn am Gebirge (Austria)
As an alternative system to glass jars, mini-silo consisting of polypropylene (PP) container for laboratory studies of fermentation dynamics in silage was proposed in our previous study. However, suitability of this mini-silo was questioned, as there was a slight probability of air penetration into container, which would lead to silage deterioration. In this study, an improvement of the original mini-silo system for ensiling was undertaken. A non-transparent PP container was replaced with a see-through container made of co-polymer polypropylene (PP), which had a lid with layer of silicon on its edge, which made this mini-silo practically air-proof. The lid was equipped with a special water valve, for releasing of gas products of the fermentation from the silage. Moreover, the seethrough container made a provision for monitoring of micro-organisms growth and thus better explanation of the obtained results on silage microbiological status. The improved silage system was tested in an experiment in which alfalfa was compacted into transparent containers with addition of two bacterial inoculants. On day 50, percentage of silage surface covered with moulds was visually estimated and samples were taken for determination of total number of moulds and volatile fatty acids. Improved mini-silo system for silage laboratory studies proposed in this paper is simple, economical, practical and capable of preventing air penetration into the silage.
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