Method for preparing high-protein feed for ruminant animals by converting distiller's grains through normal-temperature solid fermentation by fungi

Abstract

The invention discloses a method for preparing high-protein feed for ruminant animals by converting distiller's grains through normal-temperature solid fermentation by fungi. Firstly, through high-temperature composting fermentation under the natural conditions, the content of active organic matters in the distiller's grains is increased, and meanwhile, the effects of effectively killing pathogenic bacteria, removing odor, eliminating residual alcohol in the distiller's grains and the like are achieved; then, through solid fermentation via white-rot fungi, the content of protein in the distiller's grains is greatly increased; meanwhile, difficult-to-digest lignin, total phenols unfavorable for livestock growth and the like in the distiller's grains are degraded; and the mouthfeel of the distiller's grain feed is improved.

Description

technical field [0001] The invention belongs to the field of feed preparation for ruminants, and in particular relates to a method for preparing high-protein feed for ruminants by using fungi to convert white distiller's grains through normal-temperature solid-state fermentation. Background technique [0002] my country is a big country in the production of liquor, and the output of liquor is on the rise year by year. In 2017, my country's liquor production exceeded 12 million tons. On the other hand, as a by-product of liquor production, distiller's grains are produced in large quantities during the brewing process. Under normal circumstances, the production of 1 ton of liquor produces about 3 tons of distiller's grains, so the annual output of liquor distiller's grains in my country has exceeded 36 million tons. If such a huge output is not processed in time, it will cause serious waste of resources and environmental pollution. [0003] my country is a large animal husb...

AI Technical Summary

Problems solved by technology

However, in the process of liquor brewing, in order to facilitate the distillation of alcohol, it is necessary to add large rice husks during the distillation process to loosen the texture of the wine grains, and the addition of rice husks greatly increases the lignin content in the distiller's grains

Ruminants can effectively utilize the cellulose in distiller's grains, but the existence of lignin and the high acidity of distiller's grains make the palatability and digestibility of distiller's grains poor, which limits the efficient utilization of distiller's grains feed by ruminants and reduces Increased the feeding value of distiller's grains and became the anti-nutritional factor of distiller's grains feed

In addition, the phenolic acids present in large quantities in distiller's grains have strong toxicity. If they are directly eaten by ruminants, they will cause growth retardation of animals and even abortion of pregnant cows.

However, there is no effective method and process for the conversion and utilization of distiller's grains to produce high-quality feed

Images