Method for producing feed from straw through steam explosion

Abstract

The invention discloses a method for producing a feed from straw through steam explosion. The method comprises the following steps of firstly, treating the straw with a rubbing and crushing machine, and then enabling the treated straw to enter a steam explosion machine, wherein the steam explosion temperature is 110-150 DEG C; and enabling the straw after steam explosion to be subjected to water supplement until the weight of the water is 60-75% of that of the straw, adding ammonium sulphate which is 3-9% of the weight of the straw as an additional nitrogen source, performing inoculating witha mixture of one or more of bacillus subtilis, bacillus licheniformis, white rot fungi, cellulomonas liazotes, candida utilis, lactobacillus amylovorus, lactobacillus acidophilus and microzymes for fermentation, wherein the quantity of strains for fermentation is 1-100 billions of strains / grams (dry basis), compacting and sealing the inoculated steam explosion straw, and performing anaerobic fermentation under 10-35 DEG C for 7-50 days. After fermentation, through detection, the content of crude protein can achieve 20% or above. According to the method disclosed by the invention, the straw isused as the raw material, through steam explosion, lignin of the straw and the crystal and winding of cellulose are destroyed, and further fermentation is facilitated. The composite fermentation stains are used for fermentation, in the fermentation process, mycelium protein and volatile fatty acids are generated continuously, and the nutrient and the quality of the straw feed are further improved.

Description

technical field [0001] The invention relates to a method for preparing animal protein feed by microbial solid-state fermentation of straw after the straw is treated by steam explosion. Background technique [0002] my country's crop straw has a large output, wide distribution, and many types. According to survey statistics, the theoretical resource of straw in the country is 800 million tons, of which corn straw accounts for more than half, and with the development of agriculture, the amount of straw production is increasing year by year. Comprehensive utilization of straw is of great significance for stabilizing agricultural ecological balance, alleviating resource constraints, and reducing environmental pressure. The main components of plant straw are cellulose, hemicellulose and lignin, etc., which are intertwined to form a high degree of aggregation and crystallization. The complex structure of this cell wall limits its application in animal husbandry production, and str...

AI Technical Summary

Problems solved by technology

[0004] Although the above patents combine the advantages of steam explosion and microbial fermentation, since there is no external nitrogen source, microorganisms cannot convert the cellulose and lignin in the steamed straw into protein, so the above patents only improve the palatability of the straw and part of the nutritional value, but the protein and volatile fatty acids with the highest value in the feed did not increase. On the contrary, the cost of steam explosion treatment and fermentation increased, and the production process was complicated, resulting in no market competitiveness of the feed