On May 19th, Shi Fengzhou of Getang Town, Luhe District, Nanjing, came to the telephone to report that more than 300 pigs in his family were fed breweries' grains to feed normally in the diet. The winter and spring seasons were mainly freshly fed. The weather has gradually turned hot. Beer The bad is prone to deterioration. He asked: What should be done after the brewer's grains are processed?
Brewer's grain is one of the main wastes in beer brewing production. It uses barley as a raw material to extract residues of soluble carbohydrates from the seeds after fermentation, which accounts for about 1/4 of total beer production. It was determined that the fresh beer grains had a moisture content of 79.25%, a crude protein of 5.19%, a crude fat of 1.86%, a crude fiber of 1.41%, a nitrogen-free extract of 11.5%, and an ash content of 0.78%.
When brewer's grains are fed, they should be accompanied by a certain percentage of static feed and supplemented with trace elements and vitamin supplements. The amount of brewer's grains added does not exceed 20% of the diet, ie the amount of feed per pig per day does not exceed 1.5 kg. Fresh brewers have a strong alcohol taste and need to be fed after high temperatures or drying. Brewer's grains should not be fed to pregnant sows, lactating sows, and boars, and it affects the reproductive performance, lactation performance, and offspring quality of sows.
Researchers at the Jinan Beer Group Corporation used EM strains, brown sugar, and dried brewers' grains to ferment at a ratio of 1:1:1. They used a small amount of warm water to pour the brown sugar into an EM preparation, mix it well, and then poured it into dried beer. Worse, mix the edges and sides, mix the humidity into groups by hand, and do not drip or loosen it. Then put it into a sealed container or plastic bag (5~40°C) for anaerobic fermentation for 4 days. In the summer) until 10 days (winter), when the distiller's grains give off a strong sweet and sour taste, they can be opened and fed. Comparing the nutrient content of fermented brewer's grains with that before fermentation, crude protein increased by 15.88%, total nitrogen acid increased by 17.34%, crude fiber decreased by 10.11%, and soluble sugar increased by 15.04. Through comparative experiments with pigs, pigs fed 10% to 20% fermented brewers' grains in the diet gained 11.2% more weight than those fed conventional methods. In addition, the brewer's grains can also be made into pellet feed, after wet distillers' grains → stirring homogenization → pre-dehydration → drying → adding auxiliary materials in proportion → mixing of main and auxiliary materials → smashing → granulation, the grain distillers' grains have a long preservation time. Also easy to transport.
According to Guo Xuexia of the Ministry of Agriculture Planning and Design Institute, the distiller's grains are fermented by microorganisms such as Lactobacillus, Streptococcus lactis, and Bacillus subtilis. Compared with direct drying, the protein content is increased from 8.8% to 19.5% to 25.8% and the energy is from 10.5 MJ. /kg increased to 17.79 MJ/kg, animal digestibility was 55%~66%.
Guo Jianhua of the College of Biological and Food Engineering of Dalian University of Light Industry has proved that the solid state fermentation can be carried out at 30°C for 60 hours under the condition that the ratio of sugar grains and beer grains is 7:3. The crude protein content in the raw material was increased from 24.6% to 36%, an increase of 11.4 percentage points; and the residual sugar in the sugar and brewer's grains was reduced from the original 20.2% to 5%, and the sugar and brewer's grains were improved. Nutritional value.