[Brewer's grains silages: high effluent production and good quality]
1997
Wyss, U. (Eidg. Forschungsanstalt fuer Nutztiere (RAP), Posieux (Switzerland))
About 160 t of fresh brewer's grains were ensiled for feeding trials between autumn 1994 and spring 1996. Almost all brewer's grains came from one brewery, a small part coming from a food industry. After filling the silos the effluent production was measured, and during feeding silage samples were taken to determine the fermentation quality and aerobic stability. In the first week after filling the silos nearly 160 l effluent per tonne was recorded. Less than half of this occurred in the food industry silages. Almost all silages were of a good fermentation quality. Little or no lactic acid was formed. During storage lactic acid was reduced. In one charge coming from the food industry, which was more pressed and had a higher dry matter content, butyric acid was detected. Sporadically a high yeast contamination was observed in samples taken from the top of the silos. As regards aerobic stability, the silages were influenced by the storage time and season (temperature)
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