Method and equipment for drying and fermenting feed at low temperature

Abstract

The invention provides a method and equipment for drying and fermenting feed at low temperature. The method includes the steps of raw material sterilizing, probiotics inoculating, fermenting, drying, material cooling, smashing and finished product packaging; according to the drying step, the material is dried at constant low temperature of 50 DEG C-90 DEG C, according to the fermenting process, the sterilized raw material is inoculated with an aerobic bacterium solution and then subjected to aerobic fermentation, glucosinolate and acid soluble protein content is monitored online, and when the glucosinolate removal rate and acid soluble protein content start to reduce, the raw material is inoculated with a facultative anaerobe solution to be subjected to facultative anaerobe fermentation. The equipment comprises a heat conducting oil furnace, a low-constant-temperature tube bundle drying drum, a rolling airing drum, a pulverizer, a storage silo and a packager. Low constant temperature drying and staged fermentation are combined and work along both lines, nutritive value and quality uniformity of the feed are guaranteed by increasing the probiotics survival amount and improving the detoxifying effect, and meanwhile production cost is reduced.

Description

technical field [0001] The invention relates to the field of feed production, in particular to a method and equipment for drying fermented feed at low temperature. Background technique [0002] In recent years, the fermented feed industry has developed rapidly in China, and has been hailed as the "third-generation feed" by scientists. Fermented feed means that microorganisms decompose or transform the anti-nutritional factors in plant, animal and mineral substances through their own metabolic activities under artificial control conditions, and produce nutrients that are more digestible and absorbed by livestock. Non-toxic feed ingredients. [0003] However, it is easy to produce glucosinolates when fermenting feed, and glucosinolates are the limiting factors that affect the large-scale use of rapeseed cypress. Up to 3%-8%. Under certain moisture and temperature conditions, glucosinolates can generate isosulfate and oxazolidine under the action of their own myrosinase, or ...

AI Technical Summary

Problems solved by technology

[0004] The conventional method steps of fermented feed include raw material sterilization, inoculation of probiotics, fermentation, drying, cooling of materials, crushing, and packaging of finished products. During the drying process, steam tube drums are usually used for drying. Due to the temperature of the steam Higher than 100°C, and high temperature will greatly reduce the survival of probiotics and seriously affect the nutritional value of feed; conventional fermentation methods, glucosinolate removal rate and acid-soluble protein content are insufficient

The low survival rate of probiotics and poor feed detoxification effect seriously affect the nutritional value of fermented feed

[0005] On the other hand, the air inlet and air outlet of the tubular drum are located at the front and rear ends of the drum. The steam enters from the air inlet and is discharged from the air outlet. The temperature difference between the inlet temperature and the outlet temperature is large. Changes can affect feed quality consistency

At the same time, after the steam is discharged, it cannot be recycled, which wastes resources and increases production costs.

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